RE: OffTopic: Entity-Beans and relational structure
You don't need BMP to do this, CMP works just fine. Create separate
entity beans for Movie, Actor, etc and establish many-to-many
relationships between them.
However, I will provide this warning: If you don't already know how to
do this, that is, if you haven't already climbed the EJB learning curve,
you will be a *lot* happier if you choose some other O/R mapping tool.
Torque, Castor, Hibernate, JDO, or even just straight JDBC; with any of
these solutions, your project will be up and running long before an
entity bean solution, and it will perform a lot better too.
Relationships in particular are hopelessly immature in Orion, and
they're even painful in WebLogic.
Jeff Schnitzer
[EMAIL PROTECTED]
-Original Message-
From: Chris Nias [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, April 24, 2002 7:49 AM
To: Orion-Interest
Subject: RE: OffTopic: Entity-Beans and relational structure
If you get the Java 2 Enterprise Edition Developers Guide (I have v
1.2.1 pdf) from www.java.sun.com
Then it is on page 135 - Mapping Table Relationships to Entity beans
It goes on to describe when you should use entity beans, and when to
use
helper classes (hint: that is what you need!)
It also gives a good example with source code.
Be warned though; you will have to use BMP!
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]] On Behalf Of Maximilian
Eberl
Sent: 24 April 2002 13:13
To: Orion-Interest
Subject: OffTopic: Entity-Beans and relational structure
Excuse me for asking off topic (and stupid), I am just learning to use
Entity Beans on Orion.
In most tutorials entity beans only represent ONE ROW from ONE TABLE,
but
relational databases go far beyond that.
I have a relational database for movies, actors, directors writers.
So I have a table tblMovies
INT id, VARCHAR title, INT year, VARCHAR description
e.g.:
1, 'Casablanca',1942,'the classical movie'
2, 'The Maltese Falcon',1946,'begin of the dark series'
3, 'The Seawulf',1947,'after the novel from Jack London'
...
I have a tblActors (INT id, VARCHAR name)
1,'Humphrey Bogart'
2,'Ingrid Bergman'
3,'Edward G. Robinson'
...
and in the same manner tblDirectors, tblWriters
And I have tables for the relations, e.g.
tblRoles (INT filmid, INT actorid)
1,1
2,1
1,2
3,3
..
and also tblMisEnScene, tblScreenplay
meaning: Humphrey Bogart (actorid: 1) appeared in 'Casablanca'
(filmid:
1)
and 'The Maltese Falcon' (filmid: 2), Ingrid Bergman (actorid: 2)
appeared
in 'Casablanca' (filmid: 1), Edward G. Robinson (actorid: 3) appeared
in
'The Seawulf' (filmid: 3) . So this relational structure allows that
one
film can have multiple actors, writers, directors and one actor can
appear
in multiple films. Relational basework, of course.
If I want to extract those films in which Humphrey Bogart appeared I
can
do
this easily in SQL (used by a Servlet) with:
SELECT title FROM tblFilms WHERE id IN (SELECT filmid FROM tblRoles
WHERE
actorid=(SELECT id FROM tblActors WHERE name='Humphrey Bogart'))
(or as in my case with JOINS from MySQL)
When I do want to write an EJB-Application using this database, how do
I
do
this ? How do I represent the relational data ?
Do I have to keep Entity Beans for EVERY row of ANY table ? Do I have
to
create temporary tables with all information merged ? This creates a
problem
because one film can have one or more writers (Casablanca had three)
and
(in
most cases) more than one actor.
This way ?
public class MovieBean implements javax.ejb.EntityBean
{
String Title;
String[] Actors;
...
public String getTitle() throws RemoteException;
{...
}
public String[] getActors() throws RemoteException;
{
return Actors[];
}
}
using Arrays filled from the database with all actors, directors,
writers ?
Please give me a hint ! (Well, I know I am stupid. But it is a good
work
to
help stupid persons)
Maximilian Eberl
http://www.derdickemax.de
mailto:[EMAIL PROTECTED]
RE: is Orion dead?
You know, this exact conversation has been surfacing every 4 months or so for the last year and a half. In particular, the internal refactoring was what occupied the 6 months before the 1.5.4 release... and now it looks like it's going on again. Every time, a handful of people (who apparently have some mysterious source of knowledge they don't care to explain) say have patience, it's about to get a lot better! My patience ran out a couple weeks ago. The 1.5.4 release has a show-stopper (for me) broken version of HttpServletResponseWrapper, and when I try to deploy my application I get a NullPointerException with a stack trace obfuscated all the way up to Thread.run(). And this isn't the first time I've had to hunt down problems with only a meaningless exception as guide. I have just fought my last obfuscated stack trace. I'm tired of waiting with no feedback. I'm in the process of porting my applications to JBoss 3.0, and so far I'm enormously pleased. The pace of development there is dizzying, and they are already ahead of Orion in terms of spec compliance. CVS commits and changes to the bug database are automatically posted to the dev list so I can see the progress daily. ...and their mailing list software actually works. Jeff Schnitzer [EMAIL PROTECTED] [I don't want to sound like I'm disparaging an obviously extraordinarily bright software development team - but it looks to me like this project has grown far beyond the reasonable scope of two or three developers.] -Original Message- From: Joseph Ottinger [mailto:[EMAIL PROTECTED]] Sent: Friday, April 12, 2002 1:05 AM To: Orion-Interest Subject: Re: is Orion dead? ...except the wait is due to an internal refactoring that should yield significant benefits. Yourconclusion was predicted by the list in general, but I disagree; the team's still working on Orion, and I figure that people will be more happy once the new versions come out. You'd hope it would be incremental changes as it was in the past (anyone remember the three-versions-a-day times?) but that's simply not realistic considering the changes being put into place. Patience. Enjoy. - Joseph B. Ottinger [EMAIL PROTECTED] http://enigmastation.comIT Consultant On Thu, 11 Apr 2002, Jarrod Roberson wrote: At 03:41 PM 4/11/2002, you wrote: Whats the current state of Ironflare and Orion? Nothing has changed in the 'stable release' of Orion for almost a year, even though there are glaring bugs in http session clustering (not even fixed in 1.5.4) and some significantly lacking components. Ironflare was supposed to be in the pavillion at JavaONE, but oddly they had no write up (apparently they didn't submit one), and didn't actually show up (so their booth was empty). There also seems to be a conspicuous infrequency to their responses here. I know that Oracle 9iAS is evolving and expanding, and I believe that IronFlare is doing a significant amount of work on the 9iAS code base (as consultants?). But whats to become of Orion? It almost appears that Oracel has consumed Orion completely and no development will happen on the old Orion. looks like someone finally figured it out! this is what happens when you get one big customer with a guaranteed revenue stream, can't much blame them myself.
RE: [orion-interest]CMP/BMP and standard JDBC, speed is of essence
From: Simon Stewart [mailto:[EMAIL PROTECTED]] Forgive me, but what about the case where you just set the prim-key-class to be java.lang.Object and don't specify a managed primary key field in your ejb-jar.xml file? While that's not the world's most advanced method for automatically generating primary keys, it's there, and it does work Of course, I have no idea how to refer to this autogenerated primary key using EJB-QL, but that's beside the point ;) Does that really work? Can you get access to the value of the key later? I've combed over that part of the spec, but it's terribly vague about how deferred keys are supposed to work. I've never seen a container that documented them, I have never seen an example of them being used, and (until now) I have never known anyone to have tried them. Jeff Schnitzer [EMAIL PROTECTED]
RE: [orion-interest]CMP/BMP and standard JDBC, speed is of essence
I probably should have phrased my question a little differently: Is this guaranteed to work on any J2EE-compliant appserver? Jeff -Original Message- From: Ray Harrison [mailto:[EMAIL PROTECTED]] Sent: Tuesday, April 09, 2002 4:30 AM To: Orion-Interest Subject: RE: [orion-interest]CMP/BMP and standard JDBC, speed is of essence Jeff - Yes, it really works. You can get access to the key value later by using getPrimaryKey on the instance. Cheers Ray Jeff Schnitzer [EMAIL PROTECTED] wrote: From: Simon Stewart [mailto:[EMAIL PROTECTED]] Forgive me, but what about the case where you just set the prim-key-class to be java.lang.Object and don't specify a managed primary key field in your ejb-jar.xml file? While that's not the world's most advanced method for automatically generating primary keys, it's there, and it does work Of course, I have no idea how to refer to this autogenerated primary key using EJB-QL, but that's beside the point ;) Does that really work? Can you get access to the value of the key later? I've combed over that part of the spec, but it's terribly vague about how deferred keys are supposed to work. I've never seen a container that documented them, I have never seen an example of them being used, and (until now) I have never known anyone to have tried them! . Jeff Schnitzer [EMAIL PROTECTED] _ Do You Yahoo!? Yahoo! Tax Center - online filing with TurboTax
RE: [orion-interest]CMP/BMP and standard JDBC, speed is of essence
From: The elephantwalker [mailto:[EMAIL PROTECTED]] You will find that if you want the _enterprise_ features offered by cmp with straight jdbc calls, your classes for jdbc calls will be slower than cmp, and _much more_ difficult to develop. I am not a smarter developer than Karl or Magnus. Their algorithms for caching, transaction management, pooling (connection, threads, objects, you name it), are among the best in the business. If I were to _attempt_ to reproduce these features, I would certainly _fail_ to reproduce these features in a reasonable time. Eh? Connection pooling and transaction management are provided to session beans through the data source. No CMP or entity beans necessary. Furthermore, if you want sane transaction demarcation, you already have to wrap all your entity bean access in session bean methods. Entity bean caching I have found to be remarkably useless. First of all, it depends on a pessimistic locking strategy, which is both hard to use (gotta love those deadlock exceptions!) and not applicable to a clustered environment or any environment in which the database table can be modified from an external source. Furthermore, finder methods are not cached - and with an eager loading strategy, I really have to wonder what the great advantage of the caching is... bringing all the bean data back usually isn't that much more expensive than bringing just the PK data back, and if it is (because of large data fields) then your cache is going to have size problems anyways. Irrespective of who may be a smarter developer, I can guarantee you that I know a *lot* more about *my* specific business logic than Karl or Magnus. Furthermore, Karl and Magnus are for the most part just implementing a specification produced by a committee of labcoats dedicated to a lowest-common-denominator set of features that IBM, BEA, Borland, Sybase, the rest of the implementers can agree to. The absence of ORDER BY in EJB-QL and the lack of a standard PK generation mechanism make me seriously wonder if any of the people writing the EJB spec have ever used it to implement a real-world application. There will always be a place for jdbc in an enterprise application. But in an enterprise application where the transaction is as important as the data, and the data structure itself may change from time to time, cmp ejbs are the way to go. Entity beans can be useful for modeling your data. For some business cases, they might actually be all you need. I, however, have yet to see one of those cases in the real world. I will reiterate the three failings I mentioned before: you cannot model relationship attributes, you cannot perform aggregation queries, and you cannot query for data that spans multiple objects. I'll add that if you're restricting yourself to EJB-QL, you're going to have even bigger problems, like the inability to order the result set without sorting yourself in Java. Relational databases have evolved over the last thirty years to provide us with a very refined solution for storing and accessing enterprise data. Entity beans are a big square peg that can only be brutally forced into the multifaceted hole that is our problem space. A resultset relies on datastructure strings, and are closely coupled with the underlying database structure. All my experience indicates that the datastructure will change many times during a project, after the project is finished, and before the application is retired. jdbc is tightly linked with the datastructure. This link goes to a low level, as many text strings need to be modified when the datastructure changes. Argh! Don't get caught in the performance trap where you application performance increases by 2%, but its almost impossible to change your application without competely rewriting it. If the primary argument for using entity beans is that they offer a layer of indirection so that you can rename columns, there are plenty of alternative approaches which are *much* simpler. I'm not saying don't use entity beans (although I would *definitely* recommend that a team which does not already have a lot of EJB expertise should avoid them), but I am saying that it is a huge mistake to consider entity beans your only means of data access. To use the square peg analogy again, reduce the size of the square to something that fits smoothly through the hole, and fill in around the edges with other mechanisms (like JDBC). Jeff Schnitzer [EMAIL PROTECTED] Consulting Contracting - J2EE, WebLogic, Orion/OC4J
RE: [orion-interest]CMP/BMP and standard JDBC, speed is of essence
From: Hani Suleiman [mailto:[EMAIL PROTECTED]] Sent: Saturday, April 06, 2002 6:20 PM To: Orion-Interest Subject: Re: [orion-interest]CMP/BMP and standard JDBC, speed is of essence CMP will load in all the entities in one go (in orion at least). There will be a performance difference between straight JDBC and EJB, since there's more involved with an EJB query. Transactions, constructing entities and so on are extra overhead that just getting a resultset back will not have. If you use JDBC from a connection obtained from a DataSource in a Session bean, all queries should have the transaction attributed defined for the Session bean method. You do not need entity beans to have transactions. So if done right, CMP will be close in speed to straight JDBC, plus you have the potential for more goodies like container caching of finders and entities and so on, that you'd get for 'free' in some new version of your favourite container, if it doesn't do so already! There's that if done right problem. If Orion (or any other app server) backed the Collection returned by a finder with the ResultSet itself (instead of producing ArrayLists), then it seems like performance wouldn't be too much different from JDBC. Of course, you're going to have all the overhead of constructing entity bean objects and loading them with all the data (ok, maybe part of the data if you're using WebLogic or other container with field groups), but it shouldn't be too dramatic compared to the remote database call. I don't know if there is a technical problem with doing this or if other containers do this, but Orion doesn't seem to be that smart. So yeah, entities are going to be slower, especially if you're listing 1000's of them. EJB-QL, even if Orion supported it, is only going to make things worse. It's an abstraction above SQL. All the hints and other database-specific goodies that you can normally encode in a SQL statement cannot be used. And you can't order the result set with EJB QL, so sorting has to be done outside the database (yeah, right!). I have found that a good approach to data access is to model your data using CMP entity beans, use them for write access, and code in JDBC whenever you need listing behavior that CMP is too slow or too inflexible to support. By far the biggest problem is that too inflexible part, IMHO... modeling relationship attributes, performing aggregation queries, or querying for data that spans multiple objects simply does not fit into the world of entity beans. This criticism seems to apply to just about any O/R mapping scheme... which is why I think they are useful, but should not be taken too seriously. A good example of this hybrid approach is the Punk Image Gallery sample application for the Maverick MVC framework: http://mav.sourceforge.net/pig. It is a comprehensive sample J2EE application which runs on Orion. It's not a trivial sample; my friends and I actually use a live instance to archive (and annotate, wiki-like) our images. There is *no* way it could perform reasonably with pure entity beans. Jeff Schnitzer [EMAIL PROTECTED] Consulting Contracting - J2EE, WebLogic, Orion/OC4J On 6/4/02 7:15 pm, Duffey, Kevin [EMAIL PROTECTED] wrote: Hi all, Kinda curious about one thing. We use BMP, and tried CMP. Both seem to load one record at a time. With straight JDBC, you can query and get a large result set back in one time. When comparing our searching using CMP and BMP, it is over 100 times slower than a straight JDBC query when getting several 1000 records. Maybe we are doing something wrong, but can anyone tell me if this makes sense? Should CMP with EJB 2.0 (and lets use all aspects, such as the EJB QL language if necessary to do a query) be as fast as a straight JDBC call? Or is it in fact that doing a query with JDBC and getting the ResultSet back is much faster than a container that implements CMP? Id really like to use EJB 2.0 and CMP, but if the results are anything like what we are seeing, it seems to be way too slow for big tasks. We are re-evaluating if we should use EJB for our tasks or not. Thanks.
RE: CMP 2.0 vs BMP - Which performes better?
From: Curt Smith [mailto:[EMAIL PROTECTED]] There are several constraints to BMP beans which make them almost always perform slower than CMP beans. In particular, the inability to bulk load beans from finder methods is a nearly fatal defect. I'd like to know more of the details? How does the container deal with the following finder in CMP differently than BMP? Collection remoteRefs = home.findSalaryGreaterThan ( 50,000); Lets assume this produces 1000 results which you then iterate through. With BMP beans, this will require 1001 database queries. First the finder, then 1000 selects to load each bean. With CMP, it's actually rather ambiguous what will happen. Last time I checked, Orion will load all the beans into an ArrayList. Yes, lots of memory consumed, but a *lot* better than 1001 database hits. Admittedly a bigger problem with orders of magnitude more objects, but even with BMP you're going to choke if the finder query returns a billion rows of primary key data. Some containers (not Orion, I don't think) allow you to specify that finders should lazy-load beans. But this brings you back to BMP performance. Some containers allow you to define field groups to minimize the amount of data brought back (especially useful if you store blobs), but not Orion. Personally, I don't understand why containers don't implement Collections backed by the ResultSet directly. 98% of the time, the client just creates an iterator and walks the results. If the client does something that the ResultSet can't support, build the full Collection. Jeff Schnitzer [EMAIL PROTECTED]
RE: CMP 2.0 vs BMP - Which performes better?
Huh? There are several constraints to BMP beans which make them almost always perform slower than CMP beans. In particular, the inability to bulk load beans from finder methods is a nearly fatal defect. In general, I recommend a combination of CMP entities and raw JDBC in session beans for queries that are not efficient or possible in a CMP environment. Just watch out for relationships in Orion. They are horribly broken, have been for years, and don't show any sign of getting better. Jeff Schnitzer [EMAIL PROTECTED] -Original Message- From: Andrew Chau [mailto:[EMAIL PROTECTED]] Sent: Friday, March 29, 2002 6:11 PM To: Orion-Interest Subject: RE: CMP 2.0 vs BMP - Which performes better? If performance is the only factor, BMP performs a million times faster than CMP. Well, may be not that much faster, but you get the point. CMP is for ease of development, basically the container does all the work for you, but it is not as flexible and you cannot fine tune the query like you can do in BMP. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of Orion Newsgroup Sent: Thursday, March 28, 2002 2:40 PM To: Orion-Interest Subject: CMP 2.0 vs BMP - Which performes better? Subject: CMP 2.0 vs BMP - Which performes better? From: alt.cybercafes [EMAIL PROTECTED] === I am in the process of building a database intensive app and wanted to know whether to use container manage persistance versus bean manage persistence for this database instensive application. What are the pros and cons of CMP and BMP.? thanks
RE: Username and Password
HttpServletRequest.getUserPrincipal().getName() should do the trick. Jeff Schnitzer [EMAIL PROTECTED] -Original Message- From: Christian, Joanne [mailto:[EMAIL PROTECTED]] Sent: Wednesday, February 06, 2002 9:30 AM To: Orion-Interest Subject: Username and Password HI All, I'm new to J2EE and Orion. I have set up form-based authorization using DataSourceUserManager. Super! From my initial jsp and/or servlet (not the login page), I would like to access the username of the person who just logged in. How can I do this? I have tried to get attributes from the ServletContext an the session. I have also tried various other things I'd rather not mention . . . So: How can I access the values of j_username and j_password once the user has been logged in? Also, where and what is j_security_check? Thanks, Joanne
RE: automatic invocation of servlet as the root-service
Create a default.jsp with either: jsp:forward page=your/servlet/path/ or % response.sendRedirect(your/servlet/path); % depending on which fits your preference best. I find that the redirect is a bit better for debugging because jsp:forward munges any errors. I never managed to configure Orion to use a servlet as the context root. Nothing in the Servlet specification seems to require this be possible, either. Jeff Schnitzer [EMAIL PROTECTED] -Original Message- From: Robert Virkus [mailto:[EMAIL PROTECTED]] Sent: Thursday, January 31, 2002 12:27 PM To: Orion-Interest Cc: Orion-Interest Subject: Re: automatic invocation of servlet as the root-service Hello Igor everyone out there, thanks for your help, I set the servlet-webdir to in the orion-web.xml and set the welcome file in the WEB-INF/web.xml to my desired servlet (welcome-file-list welcome-filecom.scaraboo.servlet.Loadbalancer/welcome-file /welcome-file-list) but if I surf to the root (eg. http://127.0.0.1), I just get a 403 Forbidden Directory browsing not allowed-Message. If I browse http://127.0.0.1/com.scaraboo.servlet.Loadbalancer instead, my servlet is invoked as expected... As you know I'd like to have my serlvet invoked each time I enter the root of the server (like in http://127.0.0.1). any further ideas? thanks a lot! - Robert Friday, February 01, 2002, 12:09:41 AM, you wrote: IC Hello, Robert . IC I sent to you the same message throw orion-interest e-mail(just reply on your message), but I am not sure you received it or not. IC Try next: IC Go to \orion\application-deployments\YourApplication... directory created IC YourSubApplication... IC folder with IC orion-web.xml where we IC can init IC servlet-webdir=/NameWebDir/ IC Default is /servlet/ IC You also can use: servlet-webdir= IC I hope it's help. IC Igor. IC Hello everybody! IC IC I hope someone can give me a hint for my problem: IC I want to try to use a servlet as the root of my web-application, so I IC want the servlet/com.company.mystuff.MyServlet - servlet called, when IC I do not specify any file in my http-request. IC IC So I want to map my servlet to the root of the web-application; if I IC call www.mycompany.com I want to get to my servlet, rather than IC receiving default.jsp or index.html (or a directory-browsing not IC allowed - message). IC IC Thanks in advance for your help!!! -- Robert Virkus scaraboo GmbH mobile Entertainment Georg-Wulf-Str.4-6 28199 Bremen Germany phone +49 - (0)421 - 59 67 549 fax+49 - (0)421 - 59 67 567 mobile +49 - (0)171 - 35 31 635 [EMAIL PROTECTED] www.scaraboo.de wap.scaraboo.de Aus Rechts- und Sicherheitsgruenden ist die in dieser E-Mail gegebene Information nicht rechtsverbindlich. Eine rechtsverbindliche Bestaetigung reichen wir Ihnen gerne auf Anforderung in schriftlicher Form nach. Beachten Sie bitte, dass jede Form der unautorisierten Nutzung, Veroeffentlichung, Vervielfaeltigung oder Weitergabe des Inhalts dieser E-Mail nicht gestattet ist. Diese Nachricht ist ausschliesslich fuer den bezeichneten Adressaten oder dessen Vertreter bestimmt. Sollten Sie nicht der vorgesehene Adressat dieser E-Mail oder dessen Vertreter sein, so bitten wir Sie, sich mit dem Absender der E-Mail in Verbindung zu setzen. For legal and security reasons the information provided in this e-mail is not legally binding. Upon request we would be pleased to provide you with a legally binding confirmation in written form. Any form of unauthorised use, publication, reproduction, copying or disclosure of the content of this e-mail is not permitted. This message is exclusively for the person addressed or their representative. If you are not the intended recipient of this message and its contents, please notify the sender immediately.
RE: Integrating LOG4J into Orion...
I put the log4j.jar in orion's lib directory, and use -Dlog4j.configuration=file:path/to/log4j.properties to initialize log4j. I'm pretty happy with this approach. I control logging on a server-wide basis, so I can use the same ear file for both testing and deployment. Jeff Schnitzer [EMAIL PROTECTED] -Original Message- From: Alex Paransky [mailto:[EMAIL PROTECTED]] Sent: Friday, January 18, 2002 5:35 PM To: Orion-Interest Subject: FW: Integrating LOG4J into Orion... One more time, the last one did not show up -Original Message- From: Alex Paransky [mailto:[EMAIL PROTECTED]] Sent: Thursday, January 17, 2002 11:09 AM To: Orion-Interest Subject: Integrating LOG4J into Orion... I have a full EJB/JSP application running with Orion. Is there a preferred method of initializing LOG4J in this situation? Looking at the LOG4J documentation, they mention using a startup servlet to do the initialization. I am concerned as to how this would work with the CLASSLOADER hierarchy. If I initialize my LOG4J at the servlet (WEB) layer, will the EJB's be able to see the initialized LOG4J or will they attempt to re-initialize due to the different classloader? Thanks. -AP_
List errors
Does anyone else get You do not have permission to send to this recipient. When attempting to send mail to this list? Of course, if you're reading this, then it's allowing me to send *some* traffic... Jeff
RE: Problem implementing Custom User Management using SimpleUserManager
I am also experiencing this - no matter what I try (and I'm pretty sure I've tried everything), I cannot get an application client user to log in using a custom user manager (either SimpleUserManager-derived or DataSourceUserManager). Note that the application client logs in just fine using admin or any of the principals.xml users. But I get the Invalid username/password exception when trying users produced by the custom user manager. This is with Orion 1.5.2. Does anyone have application clients working with a custom user manager? Jeff -Original Message- From: Adam Maliborski [mailto:[EMAIL PROTECTED]] Sent: Saturday, September 29, 2001 7:09 AM To: Orion-Interest Subject: Problem implementing Custom User Management using SimpleUserManager Hi, I am trying to validate users of my ejb server via a database using the SimpleUserManager. I have extended SimpleUserManager and overridden the three methods and confirmed that they are being called and returning true. I have made the following changes to the descriptors. ORION-APPLICATION.XML orion-application deployment-version=1.5.2 ejb-module remote=false path=ejb.jar / web-module id=web path=web.war / security-role-mapping name=administration group name=administration / /security-role-mapping security-role-mapping name=productbuilder group name=productbuilder / /security-role-mapping security-role-mapping name=enduser group name=enduser / /security-role-mapping persistence path=persistence / library path=c:\test\ejb.jar / principals path=principals.xml / user-manager class=com.test.rms.user.orion.UCIServerUserManager / log file path=application.log / /log namespace-access read-access namespace-resource root= security-role-mapping name=lt;jndi-user-rolegt; group name=administration / group name=productbuilder / group name=enduser / /security-role-mapping /namespace-resource /read-access write-access namespace-resource root= security-role-mapping name=lt;jndi-user-rolegt; group name=administration / group name=productbuilder / group name=enduser / /security-role-mapping /namespace-resource /write-access /namespace-access /orion-application PRINCIPALS.XML principals groups group name=administration permission name=administration / permission name=rmi:login / permission name=com.evermind.server.rmi.RMIPermission / /group group name=productbuilder permission name=rmi:login / permission name=com.evermind.server.rmi.RMIPermission / /group group name=enduser permission name=rmi:login / permission name=com.evermind.server.rmi.RMIPermission / /group /groups users /users /principals ORION-EJB-JAR.XML orion-ejb-jar deployment-version=1.5.2 deployment-time=e93e1950d0 enterprise-beans .. .. (EJB DECLARATION) .. assembly-descriptor security-role-mapping name=administration /security-role-mapping security-role-mapping name=productbuilder /security-role-mapping security-role-mapping name=enduser /security-role-mapping default-method-access security-role-mapping name=lt;default-ejb-caller- rolegt; impliesAll=true / /default-method-access /assembly-descriptor /orion-ejb-jar When I try to access the ejb server through an external java client using the following code : Properties prop = new Properties(); prop.put (java.naming.factory.initial, com.evermind.server.ApplicationClientIn itialContextFactory); prop.put(java.naming.provider.url, ormi://localhost/UCIServer); prop.put(java.naming.security.principal, adammal); prop.put(java.naming.security.credentials, adammal); Context initial = new InitialContext(prop); I get the following error : java.lang.SecurityException: Invalid username/password for UCIServer (adammal) at com.evermind._cd._mu(Unknown Source) at com.evermind._cd._mu(Unknown Source) at com.evermind._cd._np(Unknown Source) at com.evermind._ce._np(Unknown Source) at com.evermind.server.rmi.RMIContext.lookup(Unknown Source) at com.evermind.server.administration.LazyResourceFinder._np (Unknown Source) at com.evermind.server.administration.LazyResourceFinder.getEJBHome (Unknown Source) at com.evermind._ck._ho(Unknown Source) at com.evermind.server.ApplicationClientInitialContextFactory.getInitialCon text(Unknown Source) at javax.naming.spi.NamingManager.getInitialContext (NamingManager.java:668) at javax.naming.InitialContext.getDefaultInitCtx
RE: Does orion support XSLT
There is an XSLT filter in place by default that automatically processes XML documents that reference a stylesheet in the header like this: ?xml-stylesheet href=doc.xsl type=text/xsl? See the directory default-web-app/examples/xsl for some simple examples. However, this is pretty primitive. If you want to be able to configure a pipeline of transformations, or work with dynamic content, I suggest looking at the Maverick MVC framework: http://mav.sourceforge.net. Jeff Schnitzer [EMAIL PROTECTED] -Original Message- From: Shah, Ritesh [mailto:[EMAIL PROTECTED]] Sent: Friday, August 31, 2001 11:52 AM To: Orion-Interest Subject: Does orion support XSLT Importance: High Hi, I was trying to find any help on XSL for orion application server. On the site www.orionserver.com it does say they have Lots of additional features XML/XSLT processing but when I try to go through there documentation I didn't find any link related to XSLT/XML. Now I feel does it support XSLT/XML. If yes then where can I find all documentation regarding configuration and implementation of XSLT/XML for orion server Please help me out. Thanks -Ritesh
RE: 2 parameter finder finding wrong thing
EJB-QL is not yet implemented in Orion. Try this: http://www.c2.com/cgi/wiki?OrionServerSpecSupport Note that Orion will automatically create finders with a single parameter that corresponds to the name of a cmp field. Otherwise you have to write them yourself. Jeff Schnitzer [EMAIL PROTECTED] -Original Message- From: Kit Cragin [mailto:[EMAIL PROTECTED]] Sent: Sunday, July 08, 2001 10:30 AM To: Orion-Interest Subject: 2 parameter finder finding wrong thing I am using EJB 2.0 and have a finder method that takes 2 parameters (e.g. the WHERE clause looks something like WHERE columnOne = ?1 AND columnTwo = ?2). No matter what I do, it does not return the right entity. I have tried single-object return, Collection return, narrowing, not narrowing, checking parameters, etc. I am running Orion 1.4.7 on HypersonicSQL for my testbed. Any ideas? Kit Cragin VP of Product Development Mongoose Technology, Inc. www.mongoosetech.com
RE: Features of CMP
Try this: http://www.c2.com/cgi/wiki?OrionServerSpecSupport Please update it as well. Jeff -Original Message- From: Stefan Marx [mailto:[EMAIL PROTECTED]] Sent: Friday, June 22, 2001 4:47 AM To: Orion-Interest Subject: Features of CMP Hi, Is there any List available which features ar implemented in Orion 1.5.2. I have some special interest in the implementation of the EJB QL (Chapter 11 in the EJB2.0 Spec). Thanks Stefan
RE: Collection or list as return ??
You're right, there is no guarantee from the spec that other app servers
will return data in order or even allow you to specify the ORDER BY
clause in the finder sql. For that matter, there is no guarantee that
the database has a sql interface.
It gets even worse. The current spec for EJB-QL has no support for
ordering. The *only* way to write a 100% spec-compliant app which does
ordering is to implement the sorting yourself, in application code, in
Java.
It's pretty obvious to me at least that the people developing the EJB
specification have never actually used their ideas to develop a real
world application. Fortunately for us, container vendors are less
insulated from the eventual customers; it's a pretty safe bet that most
servers will let you configure the ordering in the database query
somehow. I wouldn't worry about it, but no, it's not standard.
Jeff Schnitzer
-Original Message-
From: Eddie Post [mailto:[EMAIL PROTECTED]]
Sent: Friday, June 15, 2001 3:48 PM
To: Orion-Interest
Subject: Re: Collection or list as return ??
Thanks Scott,
Thanks for the test (stupid that I didn't thought about that
;) ). So, yes
the returned Collection (read: ArrayList) is a sorted one.
But how general is this, as I can't find anything in the J2EE
spec about
this and is it possible that Orion will change this such that
it isn't
sorted anymore ?
What do you think ? Let the DB do the order by or just let
the sort method
of Collections do the trick ? I have noticed that the sort
method is very
fast.
Eddie
From: Scot Weber [EMAIL PROTECTED]
Reply-To: Orion-Interest [EMAIL PROTECTED]
To: Orion-Interest [EMAIL PROTECTED]
Subject: Re: Collection or list as return ??
Date: Fri, 15 Jun 2001 12:15:46 -0700
Eddie,
I just tested it . . .
MyTestHome.java __
public interface MyTestHome {
public Collection findAll () ...
}
mytest.jsp__
%= myTestHome.findall ().getClass () %
output_
java.util.ArrayList
peace - scot
Eddie wrote:
Hellu there,
Some time ago someone made a remark that it make no sense
putting a
ORDER
BY in the where clause in the orion-ejb-jar.xml, as the finder
methods of
the home interface do return a Collection, which are not sorted by
definition.
Hmmm makes sence, but if I play around with it and put a
ORDER BY id
ASC
or ORDER BY id DESC in the where clause in the
orion-ejb-jar.xml, to
fine
tune some queries, it does return sorted collections
Howcome ?? Does the finder methods return a sorted List as a J2EE
feature,
that is a subClass of a Collection, or is this just Orion. ??
The thing is that I like to optimize my queries, but if
this feature
isn't
J2EE for example I will have a problem with the following
upgrades if
it's
left out for some reason !!
BTW: in the J2EE spec, in section 10.5.6 they only talk about the
Collection
data type.!!
Some advise please ??
Eddie
--
scot weber - [EMAIL PROTECTED]
-
Given a choice between a folly and a sacrament, one should
always choose the folly -- because we know a sacrament
will not bring us closer to God and there's always a chance
that a folly will. - Erasmus
The only man who never makes a mistake is the man who
never does anything. - Theodore Roosevelt.
__
___
Get Your Private, Free E-mail from MSN Hotmail at
http://www.hotmail.com.
RE: Counting CMP entities
It's not necessarily true that findAll().size() would be expensive. A slick container implementation would delay the actual query until the first method call on the Collection. If size() is the first method called, the container could easily perform the proper select count(*). The question then becomes, how slick is Orion's implementation of CMP finders? I just ran a test and discovered that Orion doesn't do this. Oh well. Maybe it should be logged in bugzilla as an enhancement. Jeff -Original Message- From: Russ White [mailto:[EMAIL PROTECTED]] Sent: Thursday, June 14, 2001 6:00 AM To: Orion-Interest Subject: Re: Counting CMP entities That would work fine but would be very expensive. I would create a getCount() method and have that method do a simple JDBC call and return the count. This way the container does not have the added overhead of creating/marshalling the collection. - Original Message - From: elephantwalker mailto:[EMAIL PROTECTED] To: Orion-Interest mailto:[EMAIL PROTECTED] Sent: Wednesday, June 13, 2001 6:56 PM Subject: RE: Counting CMP entities Sergei, Do a findAll() ,you get a collection. Then do a result.size(), that should do it. Regards, the elephantwalker -Original Message- From: [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Sergei Batiuk Sent: Tuesday, June 13, 2000 3:25 PM To: Orion-Interest Subject: Counting CMP entities Is it possible to count the number of records in a table with a CMP? WBR, Sergei
RE: Oracle deal gag
From: Jay Armstrong [mailto:[EMAIL PROTECTED]] Seriously, smartass, I'd like a 'yes' or 'no' answer from you: do you really think the CIA doesn't monitor the web? I'm not a smartass. I'm just out to get you :-) From Catch-22: They're trying to kill me, Yossarian told him calmly. No one's trying to kill you, Clevinger cried. Then why are they shooting at me? Yossarian asked. They're shooting at *everyone*, Clevinger answered. They're trying to kill everyone. And what difference does that make? The difference between cynicism and paranoia is the difference between: The CIA is monitoring email on the internet. The CIA is monitoring *my* email on the internet. I can, with almost complete confidence, assure you that nobody at Ironflare is censoring your email. From longtime observation of this list, I have discovered that the mailing list software Sucks Bigtime. I'm sorry to say this, because someone at Ironflare probably put a significant amount of time into it in a noble but misguided attempt to show off the Orion server. Unfortunately natural brilliance and a thorough understanding of J2EE do not automatically translate into detailed knowledge of ESMTP and the specific manner in which the hundreds of mail agents out there butcher it. The consequence is that with *frequent* occurance mail is lost, mail is delivered out of order, the list blacks out for weekends at a time, vacation messages get sent to everyone, mail senders get back dozens of bounce messages, etc. I started that thread you mentioned (Orion Team Needs New List Software), and it's still very much true. I suspect that vanity prevents Ironflare from converting to Mailman or some other mature package. As to why Karl never responded to your message about licensing violation, hey, maybe he's too busy working on the broken list software. Or more likely, Orion. Think about it. What's a two-person company in Sweden going to do about somebody 10,000 miles away abusing a $1500 license? The practical limitations of enforcement pretty much mean that anyone that wants to can steal the software. For a small company and a relatively inexpensive product you just have to hope that there are enough honest customers out there to pay your bills. Fortunately it looks like there are. I don't understand why you think the Oracle deal is anything but a fanstastic coup for both us (the Orion community) and Ironflare. It validates the product, puts a significant amount of $$$ in the pockets of Karl Magnus, makes it a lot easier for us to sell Orion to clients, and *radically* increases our market value as experts with The Oracle J2EE Solution as well as the obscure Swedish app server we know and love. Larry and Karl make a deal, and suddenly my resume gets a steroid injection! I couldn't be happier! Will Oracle draw from this community? Send them a resume and find out! What kind of validation are you looking for? Sure we (the users) spend a lot of time debugging the app server - but hey, nobody is forcing us to run the autoupdater. And a lot of people, myself included, consider this just the least we can offer to Ironflare for providing us with a free server. Free for noncommercial use has bought them a lot more than $1500 worth of my time, and I'm quite content about it. Jeff Schnitzer [EMAIL PROTECTED]
RE: Oracle deal gag
From: Jay Armstrong [mailto:[EMAIL PROTECTED]] [...paranoia...] Have you ever considered that maybe your communications are being intercepted and preprocessed by a CIA computer? Do you hear clicking noises every time you pick up the phone? You have accidentally sumbled across The Swedish Conspiracy. Ironflare is actually a front company for arms smuggling: It is a little known fact that Larry Ellison converted to a radical reactionary Islamic sect recently. Oracle purchases app servers from Ironflare, Ironflare uses the money to purchase Kalishnakov rifles from nearby Russia, and a renegade CIA group smuggles them into Afghanistan to support the Taliban. Magnus and Karl are ficticious identities; in fact their names are acronyms for Make Arms Gifts Neglecting Upgrading Software and Keep Armstrong's Replies Limited. Now that you have now exposed yourself and your knowledge, the Men In Black will be coming for you soon. Good luck! Jeff Schnitzer
RE: 1.5.1 vs 1.4.7 RequestDispatcher
I am definitely experiencing something very similar. I haven't tried it with a version of Orion prior to 1.4.8, but I find that using RequestDispatcher.forward() produces erratic results, usually without sending any output. I find that calling include() works as advertised. The exact same code with forward() works fine with Tomcat4. I logged bug #482 about this. It would probably help if you added more information: http://bugzilla.orionserver.com/bugzilla/show_bug.cgi?id=482 I will try 1.4.7 and see if it works. BTW, I'm using an HttpServletResponseWrapper subclass; I haven't tried without a wrapper to see if it works. Jeff -Original Message- From: Kit Cragin [mailto:[EMAIL PROTECTED]] Sent: Wednesday, May 30, 2001 11:49 AM To: Orion-Interest Subject: 1.5.1 vs 1.4.7 RequestDispatcher Is there something that changed between 1.5.1 and 1.4.7 that broke my forward() requests? I have a servlet mapped to /start and protected by a role, user, in web.xml. The servlet obtains a RequestDispatcher to /roles/user/index.jsp. This JSP has an iframe that loads /roles/user/content.html. Under 1.4.7 when I do http://localhost/webapp/start I got a login prompt as expected and everything shows up correctly. Under 1.5.1, the same URL causes 3 login prompts. On the last one, I get a 401 unauthorized on content.html. Anyone know why this could be occuring? Thanks, Kit Cragin VP of Product Development Mongoose Technology, Inc. www.mongoosetech.com
RE: Tracing SQL
I don't believe there is any way to force Orion to spit out that information. However, when running against Hypersonic in server mode, you see all the SQL on the database console. I find this to be an excellent arrangement for development. If you wanted to, you could fairly easily write a JDBC wrapper that prints the SQL. I wouldn't be surprised if someone has already written such a creature. Jeff -Original Message- From: Koster, K.J. [mailto:[EMAIL PROTECTED]] Sent: Tuesday, May 29, 2001 1:03 PM To: Orion-Interest Subject: Tracing SQL Dear All, I'm having some trouble finding what Orion is doing in my databases. I get truncated data without any error messages. How can I see what SQL statements Orion executes? (MySQL, with the mm-mysql driver, if that matters). When I have a Java long datatype for a CMP property on an enity bean. It's mapped to int(11) in the database. How come the values are truncated? Who is clipping my longs? Kees Jan You are only young once, but you can stay immature all your life.
RE: Struts help?
Struts doesn't work out of the box with Orion versions prior to 1.4.8. The message resources problem is that when re-implementing the ResouceBundle (for reasons nobody on the struts list could tell me), Struts used a method on the Orion classloader that was not implemented (getResourceAsStream). Run the autoupdate and Struts will work fine. You might have other problems, though (autoupdate versions are experimental). Or you might want to use the Maverick framework, which works well with JSP and is a lot simpler than Struts: http://mav.sourceforge.net Good luck, Jeff -Original Message- From: Chad Stansbury [mailto:[EMAIL PROTECTED]] Sent: Thursday, May 24, 2001 6:43 AM To: Orion-Interest Subject: Re: Struts help? Sorry, it was rushed when I sent the original message and forgot to include this information... Anyway, I'm using Orion 1.4.5 'out of the box' and struts 1.0-b2, also 'out of the box'. I'm getting two distinct error messages - one is that the jndi protocol is not recognized (due to struts looking for the struts DTD using a jndi://-based URL), and the second is that it 'Cannot find message resources under key org.apache.struts.action.MESSAGE'. Any help would be appreciated. Chad Stansbury - Original Message - From: Grama Bogdan To: '[EMAIL PROTECTED]' Sent: Thursday, May 24, 2001 12:32 AM Subject: RE: Struts help? What version of orion do you have? Bigdan. -Original Message- From: Chad Stansbury [mailto:[EMAIL PROTECTED]] Sent: Thursday, May 24, 2001 3:04 AM To: Orion-Interest Subject: Struts help? Hello - I'm having a little trouble getting the struts-example application working... and before I spend a lot of time trying to do so, I'd like to know if anyone else has already expended the effort. Has anyone got some experience with Struts Orion? Thanks in Advance, Chad Stansbury
RE: Deployment to multiple instances...?
Furthermore, rather than having multiple web.xml files, you can use Ant's style task to apply transforms to the base web.xml. Then all you need are xsl files which contain the different context parameters. With a little XSLT knowledge, it's really easy to do. A simpler approach, though, would be to define propeties with the -D option to the JVM. Jeff -Original Message- From: Reid Hartenbower [mailto:[EMAIL PROTECTED]] Sent: Thursday, May 17, 2001 1:19 PM To: Orion-Interest Subject: Re: Deployment to multiple instances...? This might not be the solution you're looking for, but you could use ant and specifiy your different deployments as different targets. This would at least give you a central place to build from, and because ant knows about .war packaging and supports FTP, theoretically (because I have not done this myself) you can do all you're looking for with build scripts. - Original Message - From: Attila Bodis [EMAIL PROTECTED] To: Orion-Interest [EMAIL PROTECTED] Sent: Thursday, May 17, 2001 10:57 AM Subject: Deployment to multiple instances...? Hi, This is a newbie question, I guess... Here is the situation: I have a web application (a bunch of servlets, JSPs, and supporting classes) I want to deploy to multiple Orion instances. Some of these instances are for QA, some are inside the firewall, and some are outside the firewall. My application has external dependencies on databases and files in the filesystem that are not part of the application itself. Rather than hard-code these values, I include them as context-params in WEB-INF/web.xml. Ideally, I'd like to be able to build my web application on my development machine, package it as a WAR file, and deploy it by just FTPing the WAR into the appropriate directory on my various Orion instances. The problem is, my configuration parameters are in WEB-INF/web.xml, which is inside the WAR file. These configuration parameters have to be different for my different instances (e.g. different directory structure, different database connection parameters, etc.). But the web.xml file inside the WAR file always overwrites the one already deployed, which means each time I distribute my WAR file to my different instances, I have to 1) wait for Orion to auto-unpack the archive, then 2) manually change the settings in WEB-INF/web.xml on each instance. Of course if I avoid putting container-specific (i.e. deployment environment-specific) parameters in WEB-INF/web.xml, then the same web.xml will work on all of my various instances. But then where do I put config parameters such as log level, log file directory, and path to my-secret-files, etc., which are used by the application but are specific to the particular deployment environment? Does Orion provide a way to specify config parameters for an application on a per-container basis? Thanks, Attila
RE: Standar Template
We finally released our framework, so I have some breathing time now :-) I'd love to take a look to see if we can find synergy. The only caveat is that I would like to avoid GPL; code would need an MIT/BSD/Apache (or equivalent) license. If you're interested, take a look at Maverick: http://mav.sourceforge.net Later! Jeff -Original Message- From: Daniel Lopez [mailto:[EMAIL PROTECTED]] Sent: Friday, May 11, 2001 12:27 AM To: Orion-Interest Subject: Re: Standar Template Hi, I haven't looked much into SiteMesh, but, just looking at the overview, it seems to me that you still have to generate the content of the different sites that you want to mesh, and if they look totally different then you are out of luck. We are using the same approach that Jeff is talking about and we don't consider XML/XSL to be that slow, as using precompiled stylesheets we boosted aour performance by a factor of three and the heaviest operation is accesing the database. As XSLT implementations improve day by day, I hope this will be less of a problem in the future. And using XML as the common ground is, IMHO, a very good approach to integrating different applications as you can use common stylesheets to integrate the different sources. But I won't pretend it is a perfect solution or that everybody should use it. That's what we use because it fits well into our team and requirements. And, Jeff, we also created our own framework to basically allow us to get the XLM content from various sources, including directly from PLSQL, so if you want we could talk about it privately. We GPLd our framework but we haven't publicized it as we don't have much time to do so. Just my 2c, Dan Mike Cannon-Brookes wrote: Noo - XML/XSL is too slow / fugly to actually use day to day (IMHO) I'd advise you to check out SiteMesh - it's built for this exact purpose! http://www.opensymphony.com/sitemesh Quite simply you provide JSP based decorators which are mapped to URIs. Download and install the sample app, it's the only way to learn about it. $10 says you're using it within a week ;) -mike -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Jeff Schnitzer Sent: Friday, May 11, 2001 7:12 AM To: Orion-Interest Subject: RE: Standar Template I've iterated through several solutions to this problem and can offer some advice: I started out using option 1 as you describe. I quickly noticed that *every* page contains the definition of the layout and look of the website. What if I wanted to put the navigation bar on the right instead of the left? I would have to modify *every single page* in my website. Yuck. My next step was to put the container code in separate head/foot JSP files and @include them like this: %@ include file=head_stuff.jsp % p My content /p %@ include file=foot_stuff.jsp % Which at least puts all the look and feel stuff in a handful of places. But my site has different templates for the logged in user vs the welcome/signup screens and a few other special cases as well. It quickly became a pain to keep track of all the different headers and footers, and in any case opening tags in one file and closing them in another really sucks. Yuck. Next step was option 2 as you describe. I created template_inside.jsp, template_outside.jsp, etc which contain all the layout structure and then include the appropriate content file based on a parameter. Since I'm using an MVC framework, this is pretty easy to do. This is the best option I've described so far, and it works. But it's not very sophisticated, and it doesn't make having multiple layers very easy. Fortunately I'm working on my own time, so now I'm moving on to the fourth generation of my website content: This sort of templating is where XSLT really shines. Rather than creating templating layers from the top down, XSLT allows you to start at the bottom and build up, successively transforming the input. Wrapping (in a layout template) is just one kind of transformation. Each step has no need to know anything specific about the previous step; it's all just based on transformation rules. I'm still near the bottom of the XSLT learning curve, but I'm already amazed at how powerful it is. It's also a lot easier to pick up than I had expected from first looking at a sample. The only problem with using XSLT in a web application is the lack of framework support. Cocoon did not make a favorable impression on me (to say the least). I wanted something that provides a simple MVC paradigm like WebWork or (not-so-simple) Struts but uses XSLT for the view templating. So I (and a friend) sat down and wrote it. Tomorrow
ANN: Maverick MVC framework (w/XSLT support) released!
http://mav.sourceforge.net The MVC framework that a friend and I have been working on is finally ready for public consumption. What's cool about Maverick can pretty much be summed up by this snippet from a hypothetical config file: command id=statistics controller type=org.infohazard.foo.controller.Stats / view id=error source-documentunavailable.xml/source-document pipeline transform src=lookAndFeel.xsl / /pipeline /view view id=success source-model node=stats/ pipeline transform src=statistics.xsl / transform src=lookAndFeel.xsl / /pipeline /view /command This shows a command that uses a controller to perform some processing (bean properties on the controller are automatically populated from the request parameters) and that can return one of two defined views. The success view wraps the JavaBeans model obtained from the controller in an adapter pattern which provides a DOM facade to the XSLT engine. Key points: . No need for intermediate templating languages like JSP or XSP to generate XML prior to transformation. An adapter provides a DOM representation of an arbitrary graph of JavaBeans through reflection. . You can define as many transformations per view as you like. . You can stop the transformation at any point (including prior to any transformation) and obtain the XML representation. XSLT designers can then work with offline content. . You can still use traditional JSP pages just like you can with Struts, with the model being placed in an attribute collection for use by jsp:useBean. If they generate XML, the pipeline facility is available. . Extensively tested with Orion :-) This is version 0.8, the first public release. Feedback is appreciated! http://mav.sourceforge.net Enjoy :-) Jeff Schnitzer [EMAIL PROTECTED] Scott Hernandez [EMAIL PROTECTED]
RE: Standar Template
Oops. Sorry everyone, that was not supposed to be posted to the list. Jeff -Original Message- From: Jeff Schnitzer Sent: Thursday, May 17, 2001 8:47 PM To: Orion-Interest Subject: RE: Standar Template We finally released our framework, so I have some breathing time now :-) I'd love to take a look to see if we can find synergy. The only caveat is that I would like to avoid GPL; code would need an MIT/BSD/Apache (or equivalent) license. If you're interested, take a look at Maverick: http://mav.sourceforge.net Later! Jeff -Original Message- From: Daniel Lopez [mailto:[EMAIL PROTECTED]] Sent: Friday, May 11, 2001 12:27 AM To: Orion-Interest Subject: Re: Standar Template Hi, I haven't looked much into SiteMesh, but, just looking at the overview, it seems to me that you still have to generate the content of the different sites that you want to mesh, and if they look totally different then you are out of luck. We are using the same approach that Jeff is talking about and we don't consider XML/XSL to be that slow, as using precompiled stylesheets we boosted aour performance by a factor of three and the heaviest operation is accesing the database. As XSLT implementations improve day by day, I hope this will be less of a problem in the future. And using XML as the common ground is, IMHO, a very good approach to integrating different applications as you can use common stylesheets to integrate the different sources. But I won't pretend it is a perfect solution or that everybody should use it. That's what we use because it fits well into our team and requirements. And, Jeff, we also created our own framework to basically allow us to get the XLM content from various sources, including directly from PLSQL, so if you want we could talk about it privately. We GPLd our framework but we haven't publicized it as we don't have much time to do so. Just my 2c, Dan Mike Cannon-Brookes wrote: Noo - XML/XSL is too slow / fugly to actually use day to day (IMHO) I'd advise you to check out SiteMesh - it's built for this exact purpose! http://www.opensymphony.com/sitemesh Quite simply you provide JSP based decorators which are mapped to URIs. Download and install the sample app, it's the only way to learn about it. $10 says you're using it within a week ;) -mike -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Jeff Schnitzer Sent: Friday, May 11, 2001 7:12 AM To: Orion-Interest Subject: RE: Standar Template I've iterated through several solutions to this problem and can offer some advice: I started out using option 1 as you describe. I quickly noticed that *every* page contains the definition of the layout and look of the website. What if I wanted to put the navigation bar on the right instead of the left? I would have to modify *every single page* in my website. Yuck. My next step was to put the container code in separate head/foot JSP files and @include them like this: %@ include file=head_stuff.jsp % p My content /p %@ include file=foot_stuff.jsp % Which at least puts all the look and feel stuff in a handful of places. But my site has different templates for the logged in user vs the welcome/signup screens and a few other special cases as well. It quickly became a pain to keep track of all the different headers and footers, and in any case opening tags in one file and closing them in another really sucks. Yuck. Next step was option 2 as you describe. I created template_inside.jsp, template_outside.jsp, etc which contain all the layout structure and then include the appropriate content file based on a parameter. Since I'm using an MVC framework, this is pretty easy to do. This is the best option I've described so far, and it works. But it's not very sophisticated, and it doesn't make having multiple layers very easy. Fortunately I'm working on my own time, so now I'm moving on to the fourth generation of my website content: This sort of templating is where XSLT really shines. Rather than creating templating layers from the top down, XSLT allows you to start at the bottom and build up, successively transforming the input. Wrapping (in a layout template) is just one kind of transformation. Each step has no need to know anything specific about the previous step; it's all just based on transformation rules. I'm still near the bottom of the XSLT learning curve, but I'm already amazed at how powerful it is. It's also a lot easier to pick up than I had expected from
RE: Caching XLS style sheets
It's *almost* ready for release... the framework has reached a pretty stable state, but the example application (a simple contact-list book) keeps getting more sophisticated :-) Jeff -Original Message- From: Arthur Copeland (Saphari.com - www.saphari.com) [mailto:[EMAIL PROTECTED]] Sent: Monday, May 14, 2001 1:12 PM To: Orion-Interest Cc: Jeff Schnitzer Subject: RE: Caching XLS style sheets i am VERY interested.. artie Quoting Jeff Schnitzer [EMAIL PROTECTED]: Excel stylesheets? Perhaps you mean XSL :-) If you use the JAXP 1.1 transforms api, creating a Templates object should produce a precompiled version of an XSLT. Although this will be completely dependent on implementation, I don't believe any implementations actually compile to bytecode - really precompiled means preparsed and maybe stored in a format for efficient processing. On a related note: A friend and I are nearly finished constructing a simple MVC framework with sophisticated XSLT support. We will be publishing it with an Apache-style license in about a week. Cool things this framework does: . Output from a view can be run through a config-defined sequence of iterative XSLT transformations. . The JavaBeans model returned from a command can be automagically adapted to a DOM for XSLT transformation without JSP, XSP, or any other templating language. Efficiently go directly from java beans to XSLT. . The transformation process can be halted at any step, allowing the XSLT creators/designers to work from static XML generated from the previous step(s). . Other templating systems can be used to feed input to the transformation process, including JSP and Velocity. Plain XML inputs can be used as well. . XSLT transformations are not required. It's still an elegant MVC framework for simple JSP/Velocity/? - HTML processing. I've attached an example configuration file so you can see the kinds of things you can do with the framework. Is anyone interested? Jeff Schnitzer [EMAIL PROTECTED] http://www.similarity.com http://www.infohazard.org/junitee -Original Message- From: Vic Cekvenich [mailto:[EMAIL PROTECTED]] Sent: Sunday, May 06, 2001 5:55 PM To: Orion-Interest Subject: Caching XLS style sheets I asked a question on an MVC application architecture using XLS, and got advice to cache XLS / XSLT style sheets, and pre compile them. Can someone give me some more background on this. How? What if the content is dynamic? (2 million items and 100,000 of styles + with any combination) Thanks in advance, Vic
RE: Database column creation order when using compound keys
The order should be determined by the elements in the orion-ejb-jar.xml deployment descriptor. Unfortunately there is a bug in 1.4.5 which causes the order of compound PK fields to switch on every deployment. It was fixed in 1.4.6. See bug #242. There is another similar problem in 1.4.8 which my test project discovered, but my normal application works fine, so I haven't spent a lot of time worrying about it :-) Take a look at bug #413. Jeff -Original Message- From: Erwin Teseling [mailto:[EMAIL PROTECTED]] Sent: Monday, May 14, 2001 8:41 AM To: Orion-Interest Subject: Database column creation order when using compound keys Hello everybody, I am having some problems regarding the order in which Orion creates the database columns for compound keys for an entity bean when using CMP. I have an entity bean that models a many-to-many relationship, which has a compound key (subscriptionID userID). Now when creating the database tables Orion seems to be inconsistent on the order in which these two are mapped on the database table. On one machine subscriptionID is mapped on the first column and on another machine (or at another time) userID is mapped on the first column (and subscriptionID on the second). Now when I fill my database with a very simple SQL script sometimes my data gets mixed up because it fills the wrong column with the wrong data. Offcourse I can fixs this in the script, but is there a way to tell Orion which field should mapp to which column in the columns to be created in the database?? Thanks! Regards, Erwin Teseling
RE: Generating primary keys
If you're required to use triggers (or some other database-specific mechanism) to generate primary keys, someone posted a clever solution to this list a long time back: use a finder method. Since you control the SQL issued for a finder method, just add a Thingie findNew(Type param, Type param); method and have it create the appropriate row in the SQL before selecting it out. BTW, the counter.jar is *not* portable. It relies on pessimistic concurrency behavior, and as far as I know the only other appserver which supports this model is WebLogic when not clustered. Even in WL 6, the default behavior is now optimistic concurrency. Here's a direct link to Brett's article about sequences (the original link has moved on to other topics): http://www.flashline.com/content/mclaughlin/bm050701.jsp?sid=98987171807 8-1066877012-153 http://www.flashline.com/content/mclaughlin/bm050701.jsp?sid=9898717180 78-1066877012-153 This is, I believe, the *only* portable way of generating sequence-type keys in EJBland. It astounds me that this is the case given that a) nearly every database offers some sort of facility for generating keys and b) the EJB container could fake it for the ones that don't. Considering how common the need to generate primary keys is, I consider this an grossly unacceptable deficiency in the spec. I'm not normally prone to believing conspiracy theories, but I have to wonder if the big RDBMS vendors sitting on the EJB committee (read: Oracle and IBM) are deliberately trying to keep CMP from becoming too popular. This is just too wierd. Jeff Schnitzer [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] http://www.similarity.com -Original Message- From: elephantwalker [mailto:[EMAIL PROTECTED]] Sent: Monday, May 14, 2001 8:38 AM To: Orion-Interest Subject: RE: Generating primary keys two ways of doing this... 1. map your ejb pk to another ejb. The counter.jar does this. It creates a long for every beantype. See the faq at www.orionserver.com http://www.orionserver.com . I think there is something under http://www.orionsupport.com/articles/ejbuniquecounter.html http://www.orionsupport.com/articles/ejbuniquecounter.html http://www.orionsupport.com , also. In your ejbCreate(), get a reference to the counter.jar, and then ask for the new pk : long id = com.evermind.ejb.CounterUtils.getNextID(java:comp/env/ejb/Counter, mybeanname); 2. See the chain of articles by Brett McGlaughlin at http://www.flashline.com/content/community.jsp?sid=989854104625-10905805 43-153#brett http://www.flashline.com/content/community.jsp?sid=989854104625-1090580 543-153#brett http://www.flashline.com . Instead of using an ejb to generate your pk references, use jdbc and a stateless session bean. In the end you do the same thing in your ejbCreate(): long id = slsbRemote.getNextID(mybeanname); And whatever you do, stay away from triggers. Regards, the elephantwalker -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Sergei Batiuk Sent: Monday, May 14, 2001 10:08 AM To: Orion-Interest Subject: Generating primary keys Hi mailing list, I have the following problem: the primary key for my EJB is generated at the database level ( a trigger ), so I don't want to generate it in the ejbCreate() method. However, EJB specification says, that the use of the primary key is a MUST. Does anyone have the solution for this problem? Any help is greatly appreciated. Sergei.
RE: Struts and Orion - the example app [EXPIRED TRIAL LICENCE]
Upgrade to Orion 1.4.8. Version 1.4.7 and prior are missing some classloader features that Struts uses (for no good reason, as far as I can tell). Jeff -Original Message- From: Sam [mailto:[EMAIL PROTECTED]] Sent: Monday, May 14, 2001 7:16 PM To: Orion-Interest Subject: Struts and Orion - the example app [EXPIRED TRIAL LICENCE] I installed struts and tried to run the example app and received the following error: 500 Internal Server Error javax.servlet.jsp.JspException: Cannot find message resources under key org.apache.struts.action.MESSAGE at org.apache.struts.util.RequestUtils.message(RequestUtils.java:285) at org.apache.struts.taglib.bean.MessageTag.doStartTag(MessageTag .java:239) at /index.jsp._jspService(/index.jsp.java:55) (JSP page line 8) at com.orionserver.http.OrionHttpJspPage.service(JAX) at com.evermind.server.http.HttpApplication.xj(JAX) at com.evermind.server.http.JSPServlet.service(JAX) at com.evermind.server.http.d3.sw(JAX) at com.evermind.server.http.d3.su(JAX) at com.evermind.server.http.ef.s1(JAX) at com.evermind.server.http.ef.do(JAX) at com.evermind.util.f.run(JAX) I followed the instruction to correct this and the error still appeared. Has anyone crossed this bridge successfully???
RE: Session Invalidate Exception
From: Noah Nordrum [mailto:[EMAIL PROTECTED]]
So have the page where the user enters their credentials wax
their session,
then the validation of the credentials page will create a new session.
That was the solution I mentioned. It is undesirable for three reasons
I can think of; one, it requires a fix in the multiple locations where
there is a login page; two, not every page with login credentials should
cause this behavior (such as a hypothetical log in as someone else
page); three, it requires access to the session in the view.
The last one is the biggest problem, IMHO, because it violates the MVC
paradigm. Views shouldn't have code.
why do you have to invalidate the session? why can't you just do:
===
HttpSession session = request.getSession();
Enumeration attributes = session.getAttributeNames();
while (attributes.hasMoreElements()) {
session.removeAttribute((String)attributes.nextElement());
}
===
Then you'll basically have a fresh session (except for a few
exceptions).
I hadn't thought of that. I heard mention on this list some time ago
that Orion stores its security credentials in the user session. The
only problem is, I don't think there is any guarantee that J2EE app
servers store credentials in the session. That code isn't necessarily
going to work everywhere.
Of course, the RoleManager code isn't portable either, so it doesn't
really matter :-)
Thanks,
Jeff
RE: Session Invalidate Exception
I don't think that excludes the desired behavior, which is that you should be able to invalidate a session and then create a new one. It appears that session invalidate() is setting a flag in the session object causing it to be cleaned up sometime later. Since the only way to logout a user is to call invalidate(), this causes some headaches. Ideally I would like my login submit page to a) discard existing credentials and b) try new credentials. This way if a user was already logged in, the net result of a new login attempt will be the unauthenticated state. Unfortunately I can't call getSession().invalidate(); session = getSession(); because what I get is the old session, which is going to disappear at the end of the method, the call to RoleManager.login() notwithstanding. Furthermore, a failed call to RoleManager.login() does *not* discard existing credentials. The only way to accomplish the original goal is to put the invalidate() on every page with a login form. Ok, this isn't super critical, but it's annoying nevertheless. Jeff -Original Message- From: Noah Nordrum [mailto:[EMAIL PROTECTED]] Sent: Friday, May 11, 2001 7:09 PM To: Orion-Interest Subject: Re: Session Invalidate Exception Session Invalidate ExceptionServlet Spec == 7.2 Creating a Session Because HTTP is a request-response based protocol, a session is considered to be new until a client joins it. A client joins a session when session tracking information has been successfully returned to the server indicating that a session has been established. Until the client joins a session, it cannot be assumed that the next request from the client will be recognized as part of the session. The session is considered to be new if either of the following is true: . The client does not yet know about the session . The client chooses not to join a session. This implies that the servlet container has no mechanism by which to associate a request with a previous request. A Servlet Developer must design their application to handle a situation where a client has not, can not, or will not join a session. == That last line is what specifically applies to your situation, only backwards. In this case you are invalidating the HttpSession, but the client doesn't yet know about the pending invalidation, hense the IllegalStateException. Noah - Original Message - From: Kesav Kumar To: Orion-Interest Sent: Friday, May 11, 2001 7:23 PM Subject: RE: Session Invalidate Exception If there is no valid session getSession(false) should return null is in't it? Kesav Kumar Software Engineer Voquette, Inc. 650 356 3740 mailto:[EMAIL PROTECTED] http://www.voquette.com Voquette...Delivering Sound Information -Original Message- From: Jason Coward [mailto:[EMAIL PROTECTED]] Sent: Friday, May 11, 2001 2:55 PM To: Orion-Interest Subject: RE: Session Invalidate Exception Kesav: I believe that when you call request.getSession(false), it will not create a new session if a valid one does not already exist. If you want to create a new one, right after invalidation of a previous session, call request.getSession() or request.getSession(true). Obviously, you will need to reset your attribute after the new session is created. Jason -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Kesav Kumar Sent: Friday, May 11, 2001 4:17 PM To: Orion-Interest Subject: Session Invalidate Exception When we call invalidate() method on the session what happens? I was doing the following and I am getting a strange error. This is just a testcondition I am giving to reproduce my error. The reality is much complex. session.setAttribute(kesav, I am nice); session.invalidate(); HttpSession sess = request.getSession(false); if(sess == null) System.out.println(Session is null); Object obj = sess.getAttribute(kesav); After the invalidate I was thinking that I won't get session object thats the reason I had a condition for null. What happening is I am getting a session object and when I try to access any attribute I am getting java.lang.IllegalStateException: Session was invalidated at com.evermind[Orion/1.4.8 (build 10374)].server.http.EvermindHttpSession.getAttribute(Unknown Source) at /Test.jsp._jspService(/Test.jsp.java:30) (JSP page line 7) at com.orionserver[Orion/1.4.8 (build 10374)].http.OrionHttpJspPage.service(Unknown Source) at com.evermind[Orion/1.4.8 (build 10374)]._aj._nxd(Unknown Source) at com.evermind[Orion/1.4.8 (build 10374)].server.http.JSPServlet.service(Unknown Source) at com.evermind[Orion/1.4.8 (build 10374)]._iib._vfd(Unknown Source) at com.evermind[Orion/1.4.8 (build
RE: Standar Template
I've iterated through several solutions to this problem and can offer some advice: I started out using option 1 as you describe. I quickly noticed that *every* page contains the definition of the layout and look of the website. What if I wanted to put the navigation bar on the right instead of the left? I would have to modify *every single page* in my website. Yuck. My next step was to put the container code in separate head/foot JSP files and @include them like this: %@ include file=head_stuff.jsp % p My content /p %@ include file=foot_stuff.jsp % Which at least puts all the look and feel stuff in a handful of places. But my site has different templates for the logged in user vs the welcome/signup screens and a few other special cases as well. It quickly became a pain to keep track of all the different headers and footers, and in any case opening tags in one file and closing them in another really sucks. Yuck. Next step was option 2 as you describe. I created template_inside.jsp, template_outside.jsp, etc which contain all the layout structure and then include the appropriate content file based on a parameter. Since I'm using an MVC framework, this is pretty easy to do. This is the best option I've described so far, and it works. But it's not very sophisticated, and it doesn't make having multiple layers very easy. Fortunately I'm working on my own time, so now I'm moving on to the fourth generation of my website content: This sort of templating is where XSLT really shines. Rather than creating templating layers from the top down, XSLT allows you to start at the bottom and build up, successively transforming the input. Wrapping (in a layout template) is just one kind of transformation. Each step has no need to know anything specific about the previous step; it's all just based on transformation rules. I'm still near the bottom of the XSLT learning curve, but I'm already amazed at how powerful it is. It's also a lot easier to pick up than I had expected from first looking at a sample. The only problem with using XSLT in a web application is the lack of framework support. Cocoon did not make a favorable impression on me (to say the least). I wanted something that provides a simple MVC paradigm like WebWork or (not-so-simple) Struts but uses XSLT for the view templating. So I (and a friend) sat down and wrote it. Tomorrow we'll send out a link to the sourceforge site; we're still working on the documentation and examples. In summary: For a simple approach, Option 2 as you describe isn't bad. For (IMNSHO) a more elegant and powerful approach, it's worth looking into XSLT. Jeff Schnitzer [EMAIL PROTECTED] http://www.similarity.com (still using WebWork, but not for long :-) -Original Message- From: Dave Ford [mailto:[EMAIL PROTECTED]] Sent: Thursday, May 10, 2001 12:17 PM To: Orion-Interest Cc: Dan Tharp Subject: Standar Template I want to create a web app in which every page on the site has a standard header along the top and a standard menu along the left edge (a pretty standard thing). I came up with 2 ways of doing this: 1. Use a table tag and jsp:include tags on EVERY page: table tr tdjsp:include page=standardHeader.jsp//td /tr tr td colspan=2 table tr td valign=topjsp:include page=/menu.jsp //td td valign=top THIS IS WHERE THE PAGE-SPECIFIC CONTENT (i.e. the body)* /td /tr /table /td /tr /table 2. Invert the above solution to create one master template (or controller) and have the content page name passed in as a parameter. Here would be the master template-controller page: table tr tdjsp:include page=standardHeader.jsp//td /tr tr td colspan=2 table tr td valign=topjsp:include page=/menu.jsp //td td valign=top jsp:include page=%=request.getParameter(contentPage)% /* /td /tr /table /td /tr /table The key difference between these two architectures are best understood by looking at the 2 lines with the * at the end. Also, in option 2, there is only one copy of the above code. In option 1, there is one copy per content page Q1: Does anyone have any preference between options 1 and 2? Q2: Is there a better way of achieving this result? Q3: Do either have any negetive drawback I need to consider? (I will be converting an entire site) By the way, I'm currently achieving this effect VERY easily using good old client-side html frames. But due to popular demand, framse must go. Dave Ford Smart Soft - The Java Training Company http://www.smart-soft.com
RE: Pure Corba client and Orion
Orion is not an IIOP-based server. It uses client stubs to communicate using the Orion RMI Protocol (ormi). If you need to access EJBs from a pure CORBA client, you have three options I can think of: Write your own RMI proxy Use some sort of HTTP-based RPC mechanism Use an app server which speaks IIOP natively There seems to be something of a religious war over the issue of stubs/proxies vs. IIOP. There is a lot of interesting discussion in the EJB-INTEREST archives about this. Jeff -Original Message- From: Bogdan Calmac [mailto:[EMAIL PROTECTED]] Sent: Tuesday, May 08, 2001 12:07 PM To: Orion-Interest Cc: [EMAIL PROTECTED] Subject: Pure Corba client and Orion I am evalating Orion as a potential application server for our product and I want to use a pure Corba client with Orion. The question I have are: 1) Does Orion provide a tool to generate idl from the remote interfaces (similar to rmic from the jdk)? 2) If not, is the idl generated by rmic compatible with Orion server? 3) What is the default port of the naming service and how can it be configured? Thanks a lot, Bogdan Calmac, CISCO Systems.
RE: Caching XLS style sheets
Excel stylesheets? Perhaps you mean XSL :-) If you use the JAXP 1.1 transforms api, creating a Templates object should produce a precompiled version of an XSLT. Although this will be completely dependent on implementation, I don't believe any implementations actually compile to bytecode - really precompiled means preparsed and maybe stored in a format for efficient processing. On a related note: A friend and I are nearly finished constructing a simple MVC framework with sophisticated XSLT support. We will be publishing it with an Apache-style license in about a week. Cool things this framework does: . Output from a view can be run through a config-defined sequence of iterative XSLT transformations. . The JavaBeans model returned from a command can be automagically adapted to a DOM for XSLT transformation without JSP, XSP, or any other templating language. Efficiently go directly from java beans to XSLT. . The transformation process can be halted at any step, allowing the XSLT creators/designers to work from static XML generated from the previous step(s). . Other templating systems can be used to feed input to the transformation process, including JSP and Velocity. Plain XML inputs can be used as well. . XSLT transformations are not required. It's still an elegant MVC framework for simple JSP/Velocity/? - HTML processing. I've attached an example configuration file so you can see the kinds of things you can do with the framework. Is anyone interested? Jeff Schnitzer [EMAIL PROTECTED] http://www.similarity.com http://www.infohazard.org/junitee -Original Message- From: Vic Cekvenich [mailto:[EMAIL PROTECTED]] Sent: Sunday, May 06, 2001 5:55 PM To: Orion-Interest Subject: Caching XLS style sheets I asked a question on an MVC application architecture using XLS, and got advice to cache XLS / XSLT style sheets, and pre compile them. Can someone give me some more background on this. How? What if the content is dynamic? (2 million items and 100,000 of styles + with any combination) Thanks in advance, Vic maverick !-- == Global Views == -- view id=goHome redirecthome.do/redirect /view !-- == Commands == -- command id=signup controller type=org.infohazard.controller.Signup / view id=success source-model root=foo / pipeline transform src=templates/file1.xsl / transform src=templates/file2.xsl / /pipeline /view view id=something source-documentfoo.xml/source-document pipeline transform src=templates/file1.xsl / transform src=templates/file2.xsl / /pipeline /view view id=another source-jsp bean=foo scope=requestjsps/blah.jsp/source-jsp pipeline transform src=templates/file1.xsl / transform src=templates/file2.xsl / transform src=templates/file3.xsl / /pipeline /view /command command id=about !-- No controller, the source document is always loaded -- source-documentabout.xml/source-document pipeline transform src=templates/file1.xsl / /pipeline !-- /view -- /command command id=home controller type=org.infohazard.action.Home / !-- Unnamed view, so this is always used no matter what perform() returns -- source-model name=data / pipeline transform src=templates/file1.xsl / transform src=templates/file2.xsl / /pipeline /command command id=plain source-documentboring.html/source-document /command /maverick
RE: Fun with compound primary keys
There have been official comments on this list to the effect that unintuitive error messages should be considered bugs. You should file a bugzilla report :-) Jeff -Original Message- From: Michael Jara [mailto:[EMAIL PROTECTED]] Sent: Wednesday, May 09, 2001 9:36 AM To: Orion-Interest Subject: Re: Fun with compound primary keys Unfortunately, it wasn't quite that simple. Since I was using CMP, my ejbCreate was returning 'null' anyway. If Orion, internally somewhere, was trying to serialize the primary key class, you would expect that it would throw an exception or at least kill the entity bean on which it was performing operations. In my case, it was killing all references to the entity beans passed in as parameters! And it was doing so only after the first creation of the faulty entity bean (e.g. one was successfully created, the next one had problems.) This is, of course, not a bug in Orion. It's just counter-intuitive behavior which occurs when the bean developer (me) does something stupid. :) Mike - Original Message - From: Frank Eggink [EMAIL PROTECTED] To: Orion-Interest [EMAIL PROTECTED] Sent: Tuesday, May 08, 2001 2:20 PM Subject: RE: Fun with compound primary keys Yep, if you don't make things serializable you get null as a 'value'. That applies to return values crossing the wire as well :-). Note that, to prevent yourself from having more fun! FE On Tuesday, May 08, 2001 2:43 AM, Michael Jara [SMTP:[EMAIL PROTECTED]] wrote: It took me a while to figure this out, so I thought I'd post it. If you are using a compound primary key class in your CMP entity bean, and you forget to make it implement java.io.Serializable, Orion may do some really strange things. In my case, I have an entity bean which represents a many to many mapping of other entity beans, called TypeDescriptionPair. This entity bean's create method took two other entity beans as parameters, EventType and EventDescription. The create method would simply extract the primary key from each of these and store it. So, I was doing something like this to test the implementation: ... eventTypes[0] = eventTypeHome.create(0, eventType0); eventTypes[1] = eventTypeHome.create(1, eventType1); ... eventDescription[0] = eventTypeHome.create(0, eventDescription0); eventDescription[1] = eventTypeHome.create(1, eventDescription1); ... typeDescriptionPairHome.create(eventTypes[0], eventDescription[0]); typeDescriptionPairHome.create(eventTypes[1], eventDescription[1]); The very last statement would throw a CreateException, because all EventType and EventDescription remote objects had mysteriously been nullified! After hours of debugging, I realized that TypeDescriptionPairs primary key class did not implement java.io.Serializable. As soon as I added implements java.io.Serailzable to the primary key class, everything was magically fixed. Mike File: ATT3.html
RE: remote shutdown of orion 1.4.8
From: Eduardo Estefano [mailto:[EMAIL PROTECTED]] The same is happening to me. Using 1.4.7 everything was fine. I already posted a message before but here it is again: - java -jar admin.jar ormi://localhost admin 123 -shutdown Works as long as no EJB/Database is called. Gives the shutting down... for ever message if ejb/jdbc is accessed This has been happening to me since I started using Orion (1.3.8). There was some discussion of this problem on the list a long time ago, and I believe the conclusion was that there is some sort of JVM problem. You might want to search the list for shutdown. I'm using Win2K with JDK 1.3 1.3_02. Jeff
RE: custom finder in CMPs
This is a perfect application for an EJB 2.0 home method. Call the
finder from within the home method and filter the results.
Basically, you put in your Home interface:
public Collection thisIsAHomeMethod() throws RemoteException;
and you put in your implementation class:
public Collection ejbHomeThisIsAHomeMethod()
{
...
}
No need to add anything to the deployment descriptor. If you want to
secure access, you can require different security roles for the finder
vs. the home method.
Jeff Schnitzer
-Original Message-
From: Armin Michel [mailto:[EMAIL PROTECTED]]
Sent: Friday, May 04, 2001 7:50 AM
To: Orion-Interest
Subject: Re: custom finder in CMPs
On Friday 04 May 2001 14:44, you wrote:
Commonly, developers build a Stateless Session EJB facade
through which
all access to Entity EJBs is accomplished. If you were to
employ such a
pattern, the method of this facade that invokes the CMP finder in
question would be an appropriate place to manipulate the
results before
returning them to the client. Have a look around
www.theserverside.com for
lots of information and discussions of EJB module design.
The facade-approach is no option, because someone could bypass that
facade
and use the home interface directly. (Everybody must be able to access
my
JNDI - thus everybody has access to the Home-Interfaces too).
It would be cool, if I could hook the cmp-finder-Method in some way. Is
that
possible? Such a callback-solution would solve my problem.
Armin Michel
PS: Meanwhile I will have a look at theserverside.com
RE: Interests sake
For production, Win2K/Orion 1.4.7/PostgreSQL. For development, Win2K/Orion 1.4.8/hsql. I'll probably move the production box to 1.4.8 soon since it seems to work well enough with my code. I have test systems running Linux/PostgreSQL too. The only problem with Win2K is that it's a pain to get everything set up as a service. RunExeSvc doesn't work with Win2K, and I haven't yet spent the time needed to get any of the various JNI service adapters working. So I'm still starting my sytem by hand from a terminal services window (which means the app server, an rmi server, and tnameserv). Yes, I'm playing fast and loose with my site availability... but in the year or so I've had the machine, it has never crashed or involuntarily rebooted :-) With Linux it's much easier to configure Java apps as daemons, but I can't render my dynamic images with any reasonable quality - XWindows renders fonts like a three-year-old with a half-eaten crayon :-) Jeff Schnitzer http://www.similarity.com http://www.infohazard.org/junitee -Original Message- From: Adam Cassar [mailto:[EMAIL PROTECTED]] Sent: Wednesday, May 02, 2001 10:53 PM To: Orion-Interest Subject: Interests sake Hi all, For interests sake, what OS is everyone on the list running orion on? Windows 2000? WinNT Linux? I would of thought that most people would be using Linux but I think from postings on this list that I might be mistaken -- Adam Cassar Technical Development Manager ___ NetRegistry http://www.netregistry.au.com Tel: +61 2 9641 8609 | Fax: +61 2 9699 6088 PO Box 270 Broadway NSW 2007 Australia
RE: Interests sake
From: Alex 'Kazuma' Garbagnati [mailto:[EMAIL PROTECTED]] With Linux it's much easier to configure Java apps as daemons, but I can't render my dynamic images with any reasonable quality - XWindows renders fonts like a three-year-old with a half-eaten crayon :-) You should try pja. It does not require any XWindow server running and I use the same fonts available on win... I tried it. Didn't produce fonts much (if at all) better than XWindows. Also tried the xvfb, which was by far the worst option. One thing you can say about MS Windows is that it does an excellent job of rendering text :-) What Linux needs is a ground-up replacement for XWindows, IMHO. Jeff
RE: MVC/XML Framework Comments please
Doh! Sorry, that wasn't supposed to go to the list. But to keep this topic going (because I'm still undecided about what direction to go): Is anyone here besides Tim using XSLT in their web application? How do you like it? Is it easy to get designers up and running with it? How do you interface between Java and XML (jsp? building dom nodes in java? something else?) ? Thanks, Jeff -Original Message- From: Jeff Schnitzer Sent: Friday, April 27, 2001 3:38 PM To: Orion-Interest Subject: RE: MVC/XML Framework Comments please I'm definitely interested in your framework; may I have a copy? Thanks, Jeff -Original Message- From: Duffey, Kevin [mailto:[EMAIL PROTECTED]] Sent: Thursday, April 26, 2001 2:39 PM To: Orion-Interest Subject: RE: MVC/XML Framework Comments please I use my own framework for a couple of sites, and have gotten feedback from others using it as well. Its only 15K in size, full source, its free to use, modify, etc. If your interested in it, send me an email. It supports xsl transformations, and is very similar to Struts only that I found struts too much for my needs, and some features it didn't do that I needed, so I went that direction. -Original Message- From: Vic Cekvenich [mailto:[EMAIL PROTECTED]] Sent: Thursday, April 26, 2001 11:53 AM To: Orion-Interest Subject: MVC/XML Framework Comments please We are bout to pick a a framework, and I am looking for are comments or recommendation on a frameworks, other than Struts. (Don't want to be HTML/JSP centric) Any feedback on your experience with a framework, or do you know of web sites in production that are using a certain frame work, or do you know of friend or someone who has used one. I would like it to be XML centric, and MVC. For example, the V should apply the XSL to XML, to make it HTML. It should do standard session tracking. It should do standard data manager, so that Java Beans do the SQL (the M). A minor plus is form entry management and a bit of image/content management. It should be a single rich framework. Here are a few we are considering: http://www.jcorporate.com/html/products/productsfm.html http://www.jcorporate.com/html/products/productsfm.html http://jakarta.apache.org/jetspeed/site/index.html http://jakarta.apache.org/jetspeed/site/index.html and all the ones under Jakarta. We need to pick one soon. Any comments and feedback welcome on frameworks/class libraries. Thanks, [EMAIL PROTECTED]
RE: Update to 1.4.8 gives strange table names after deployment ???
This line is in changes.txt: Moved orion-ejb-jar.xml's inclusion path in an ejb-jar to the META-INF/ directory from the orion/ directory for consistency. BTW, Struts now works out of the box with 1.4.8. Jeff -Original Message- From: KirkYarina [mailto:[EMAIL PROTECTED]] Sent: Wednesday, April 25, 2001 7:12 AM To: Orion-Interest Subject: Re: Update to 1.4.8 gives strange table names after deployment ??? Move (or link or copy) your orion-ejb-jar.xml under META-INF, instead of the orion directory. This was mentioned on the list a while back, but didn't seem to make it into changes.txt. It bit me, too Kirk Yarina At 01:12 PM 4/25/01 +0200, you wrote: Great to see there is a new version of Orion, my compliments. I performed the upgrade through autoupdate.jar and redpoyed my applications, whereby I first removed the applications from the application deployment dir. The orion-ejb-jar-xml that Orion generates contains incorrect table names which were correct in 1.4.7, see below for the first part of the orion-ejb-jar.xml file. It transforms table=sgsusr to :table=nl_unwired_sgs_um_User which isn't correct I suppose. Can someone please tell me what goes wrong, as I can't access my database like this ?? BTW: The orion-application contains: autocreate-tables=false. Eddie my orion-ejb.jar.xml: ?xml version=1.0? ?xml version=1.0? !DOCTYPE orion-ejb-jar PUBLIC -//Evermind//DTD Enterprise JavaBeans 1.1 runtime//EN http://www.orionserver.com/dtds/orion-ejb-jar.dtd; orion-ejb-jar deployment-version=1.4.8 deployment-time=e4a8a4f467 enterprise-beans entity-deployment table=sgsusr name=nl.unwired.sgs.um.User location=nl.unwired.sgs.um.User data-source=jdbc/postgresEJBDS exclusive-write-access=false --- The above is transformed to: !DOCTYPE orion-ejb-jar PUBLIC -//Evermind//DTD Enterprise JavaBeans 1.1 runtime//EN http://www.orionserver.com/dtds/orion-ejb-jar.dtd; orion-ejb-jar deployment-version=1.4.8 deployment-time=e614c0c4f1 enterprise-beans entity-deployment name=nl.unwired.sgs.um.User location=nl.unwired.sgs.um.User wrapper=UserHome_EntityHomeWrapper8 table=nl_unwired_sgs_um_User data-source=jdbc/postgresEJBDS
RE: MVC/XML Framework Comments please
beacuse it's so lightweight and noninvasive compared to Struts; no worries that Struts might not install on platform X (such as Orion 1.4.8 :-( ). Good luck, Jeff Schnitzer [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] http://www.similarity.com http://www.similarity.com -Original Message- From: Vic Cekvenich [mailto:[EMAIL PROTECTED]] Sent: Thursday, April 26, 2001 11:53 AM To: Orion-Interest Subject: MVC/XML Framework Comments please We are bout to pick a a framework, and I am looking for are comments or recommendation on a frameworks, other than Struts. (Don't want to be HTML/JSP centric) Any feedback on your experience with a framework, or do you know of web sites in production that are using a certain frame work, or do you know of friend or someone who has used one. I would like it to be XML centric, and MVC. For example, the V should apply the XSL to XML, to make it HTML. It should do standard session tracking. It should do standard data manager, so that Java Beans do the SQL (the M). A minor plus is form entry management and a bit of image/content management. It should be a single rich framework. Here are a few we are considering: http://www.jcorporate.com/html/products/productsfm.html http://www.jcorporate.com/html/products/productsfm.html http://jakarta.apache.org/jetspeed/site/index.html http://jakarta.apache.org/jetspeed/site/index.html and all the ones under Jakarta. We need to pick one soon. Any comments and feedback welcome on frameworks/class libraries. Thanks, [EMAIL PROTECTED]
RE: MVC/XML Framework Comments please
How do you integratecopy with dynamic content? Two layers of XSL transformation (one to mix in copy, one to mix in markup)? Or do you use JSP-type templating to build the Content XML before it is sent off to XSLT? Thanks, Jeff -Original Message- From: Tim Endres Sent: Thu 4/26/2001 5:30 PM To: Orion-Interest Cc: Subject: RE: MVC/XML Framework Comments please It sounds like Tim has a homebrew system for going directly from Logic to Presentation. My team has been thinking of eventually writing a wrapper to expose JavaBeans (the model) as a DOM using reflection so you could still have a pull-based system rather than having to build the full tree ahead of time. I'm not sure it's ultimately desirable to skip the Logic-Content step, although it would improve performance. Not quite. We use Logic (Session Beans/Commands) -- Content (XML) -- Presentation (XSL). We simply apply the XSLT transform ourselves, as opposed to having Orion do it, so we can precompile and cache appropriately. I personally think that skipping the Content step is shortsighted. For instance, our web page designers never need a live system to connect to. We simply provide them with XML files and they write the XSL against the static XML files. When the XSL is dropped into the live system, it simply operates on live XML coming from the Logic layer. I think this abstraction is important. tim. winmail.dat
RE: Strange error after upgrade to 1.4.8 ?
I have the same problem and have logged bug #414 against it. I find that the problem goes away if you set your transaction attributes to NotSupported. That may or may not be an option for you :-) It might help Magnus debug it if you attached your orion-ejb-jar.xml to the bug report too. Jeff -Original Message- From: Eddie [mailto:[EMAIL PROTECTED]] Sent: Thursday, April 26, 2001 7:45 AM To: Orion-Interest Subject: Strange error after upgrade to 1.4.8 ? Hmm, somethings are still not working well after the update from 1.4.7 to 1.4.8. After the upgrade I get the following error after using a finder method with CMP (ofcourse it worked before): java.lang.InternalError: Was not in used mode at com.evermind.server.ejb.DataSourceConnection.release(Unknown Source) The stange thing is the some parts of the application are working properly (parts that include database interaction). Neither do I receive database errors in my db log. Can someone explain me what the error mean and how to solve it ? BTW: below is my datasourse is listed below, just as the complete error: Eddie --- data-sources data-source class=com.evermind.sql.ConnectionDataSource name=Postgres datasource location=jdbc/postgresDS pooled-location=jdbc/postgresPooledDS xa-location=jdbc/xa/postgresXADS ejb-location=jdbc/postgresEJBDS schema=database-schemas/postgresql.xml url=jdbc:postgresql://localhost/wwwunweb5 connection-driver=org.postgresql.Driver username=login password=password inactivity-timeout=30 / com.evermind.server.rmi.OrionRemoteException: Transaction was rolled back: java.lang.InternalError: Was not in used mode at UserManager_StatelessSessionBeanWrapper5.getMembersFromAccount OrderedBy(User Manager_StatelessSessionBeanWrapper5.java:6291) at nl.unwired.sgs.web.smsmessage.doRequest(smsmessage.java:278) at nl.unwired.servlet.VelocityHttpServlet.doGet(VelocityHttpServl et.java:129) at javax.servlet.http.HttpServlet.service(HttpServlet.java:195) at javax.servlet.http.HttpServlet.service(HttpServlet.java:309) at javax.servlet.http.HttpServlet.service(HttpServlet.java:336) at com.evermind._iib._vfd(Unknown Source) at com.evermind._iib._qjc(Unknown Source) at com.evermind._kj._qbc(Unknown Source) at com.evermind._kj._oa(Unknown Source) at com.evermind._jw.run(Unknown Source) - Original Message - From: KirkYarina [EMAIL PROTECTED] To: Orion-Interest [EMAIL PROTECTED] Sent: Wednesday, April 25, 2001 4:12 PM Subject: Re: Update to 1.4.8 gives strange table names after deployment ??? Move (or link or copy) your orion-ejb-jar.xml under META-INF, instead of the orion directory. This was mentioned on the list a while back, but didn't seem to make it into changes.txt. It bit me, too Kirk Yarina At 01:12 PM 4/25/01 +0200, you wrote: Great to see there is a new version of Orion, my compliments. I performed the upgrade through autoupdate.jar and redpoyed my applications, whereby I first removed the applications from the application deployment dir. The orion-ejb-jar-xml that Orion generates contains incorrect table names which were correct in 1.4.7, see below for the first part of the orion-ejb-jar.xml file. It transforms table=sgsusr to :table=nl_unwired_sgs_um_User which isn't correct I suppose. Can someone please tell me what goes wrong, as I can't access my database like this ?? BTW: The orion-application contains: autocreate-tables=false. Eddie my orion-ejb.jar.xml: ?xml version=1.0? ?xml version=1.0? !DOCTYPE orion-ejb-jar PUBLIC -//Evermind//DTD Enterprise JavaBeans 1.1 runtime//EN http://www.orionserver.com/dtds/orion-ejb-jar.dtd; orion-ejb-jar deployment-version=1.4.8 deployment-time=e4a8a4f467 enterprise-beans entity-deployment table=sgsusr name=nl.unwired.sgs.um.User location=nl.unwired.sgs.um.User data-source=jdbc/postgresEJBDS exclusive-write-access=false --- The above is transformed to: !DOCTYPE orion-ejb-jar PUBLIC -//Evermind//DTD Enterprise JavaBeans 1.1 runtime//EN http://www.orionserver.com/dtds/orion-ejb-jar.dtd; orion-ejb-jar deployment-version=1.4.8 deployment-time=e614c0c4f1 enterprise-beans entity-deployment name=nl.unwired.sgs.um.User location=nl.unwired.sgs.um.User wrapper=UserHome_EntityHomeWrapper8 table=nl_unwired_sgs_um_User data-source=jdbc/postgresEJBDS
RE: Is this the Orion Team?
Nope. I know Satan, and she's not that cute :-) Jeff -Original Message- From: Hani Suleiman [mailto:[EMAIL PROTECTED]] Sent: Tuesday, April 17, 2001 7:18 AM To: Orion-Interest Subject: RE: Is this the Orion Team? And what a lovely picture it is. PS Anyone notice how one of them looks likeSatan? On Tue, 17 Apr 2001, Kemp Randy-W18971 wrote: If you go to the Swedish newspaper site, there is a picture of the developers. -Original Message- From: Johan Fredriksson [mailto:[EMAIL PROTECTED]] Sent: Tuesday, April 17, 2001 3:09 AM To: Orion-Interest Subject: Re: Is this the Orion Team? Yes - Original Message - From: "Kemp Randy" [EMAIL PROTECTED] To: "Orion-Interest" [EMAIL PROTECTED] Sent: Tuesday, April 17, 2001 2:32 AM Subject: Is this the Orion Team? Some digging though the.serverside.com, at the link http://www2.theserverside.com/reviews/thread.jsp?thread_id=165, uncovered this. Posted By: Per Norrman on November 3, 2000 in response to this message. A couple of weeks ago, the Orion team was featured in Dagens Nyheter, the largest swedish newspaper. Learn swedish, then read this article: http://www.dn.se/DNet/dyn/Crosslink.dyn?d=408a=135807f=huvudt ext.htmlt=2 v=0 In short, the Orion team consists of two guys, 22 and 24 years old, working from an apartment in Eskilstuna, Sweden. The article mentiones that they spent about two years and approx 14 000 programming hours before their first order. However, that implies constantly working more than 19 hours a day for two years Also, they have refused venture capital and and other offers, on the grounds that it would limit their freedom of doing things their own way. __ Do You Yahoo!? Get email at your own domain with Yahoo! Mail. http://personal.mail.yahoo.com/
RE: findBy referencing another entity reference
This is the right idea; you want to do a join in the finder. Relational databases were designed to do exactly this sort of thing. Putting extra information in the EJBs would just lead to consistency problems, IMHO. The EJB 2.0 specification defines EJB QL, which is a database-independent query language reminiscent of SQL and the preferred solution to your problem. Unfortunately Orion does not yet support EJB QL, so you need to manually specify the join in SQL in the orion-ejb-jar.xml finder definition. You will need to use a partial="false" finder to do a join, which means you need to be very careful about how you specify the select. Select table.* should work if you allowed Orion to create the table in the first place. Otherwise you'll need to make sure that the columns are specified in the same order as the fields in ejb-jar.xml. You will probably want to put this new finder definition in an orion-ejb-jar.xml fragment included in your ejb jar file so that deploying your j2ee app on a new server will automatically include the changes. There is much discussion in the archives about how to do this. Good luck! Jeff -Original Message- From: Adam Cassar [mailto:[EMAIL PROTECTED]] Sent: Monday, April 16, 2001 6:41 PM To: Orion-Interest Subject: Re: findBy referencing another entity reference I found this reply to an earlier posting quite usefull. http://www.mail-archive.com/orion-interest@orionserver.com/msg1 2085.html
RE: How to enable UserManager support for arbitrary user...
r account. A Visual Basic client, then uses these "command" URLs and resulting XML to present a user interface. Given the above scenario, what would be your recommendation for authenticating the user starting right after I accept the user/password from the VB form (I don't much care for VB specifics, just the part which deals with EJB/JSP/J2EE security). After accepting user authentication information from a VB dialog, what should I do next. How do I get this information "registered" with Orion or any j2ee application server so that the deployment descriptor information works correctly. Is this the way J2EE security was meant to be used. A non super-user account, cannot execute a setSuperuser(boolean) function on the User bean. Is this how I should be controlling this? Is this the proper method? I was reading the J2EE EJB spec which states that coding security should be the last resort. I am not clear on how to execute the above scenario. Thanks to all the people who have already posted in regards to this issue. -AP_ -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Jeff Schnitzer Sent: Friday, April 13, 2001 10:09 PM To: Orion-Interest Subject: RE: How to enable UserManager support for arbitrary user... I suggest using an MVC (aka "Model 2") approach, separating your view from your controller. One of the controller's responsibilities can be to check for authentication and provide to the user either the requested page or the login page. If you use a dispatcher-servlet-action framework for your controller, you typically will only need to put the authentication checking code in a base action class from which all protected action classes derive. If you use JSPs as controllers you'll need some sort of code in every one (you can use @include for this). You will be much happer if you use an MVC appraoch, trust me. The J2EE automatic form-based authentication is very crude and fails to accomodate simple use cases like automatically logging in new users. You might want to look at WebWork: http://www.sourceforge.net/projects/webwork. BTW, if you use the Orion UserManager (and RoleManager), you should not do your own database lookup. Calling RoleManager.login() causes methods to be called on the UserManager, which can either be your class or one of the UserManagers that ship with Orion. DataSourceUserManager looks up password and group information in a table. Jeff -Original Message- From: Alex Paransky [mailto:[EMAIL PROTECTED]] Sent: Friday, April 13, 2001 3:20 PM To: Orion-Interest Subject: RE: How to enable UserManager support for arbitrary user... Tim, this IS what I am looking for, but does it mean that I need to put this into every .JSP page that I have? Then, somehow (according to J2EE spec) Orion will forward this information to all EJB calls and properly make use of the deployment descriptor stuff? So every .JSP page will check the session, find the User object which I stored in there, and execute this call with the user.login and user.password? Thanks. -AP_ -Original Message- From: Tim Endres [mailto:[EMAIL PROTECTED]] Sent: Friday, April 13, 2001 3:04 PM To: Orion-Interest Cc: Alex Paransky Subject: Re: How to enable UserManager support for arbitrary user... Is this what you are looking for? RoleManager roleMgr = (RoleManager) (new InitialContext()).lookup( "java:comp/RoleManager" ); roleMgr.login( "user", "pass" ); Unfortunately, I think that can only run in the container. To accomodate multiple logins under a servlet, we used to use a new InitialContext on every servlet request and set the appropriate JNDI properties for each InitialContext construction. tim. We have developed a web application with our own user/group schema. Creating a UserManager to map our schema seems pretty trivial. What we are NOT clear on is how to tell Orion that a particular user has logged in. For example, we start our application with a LOGIN.JSP page, which accepts user name/password, and proceeds to find the user in the database. After the user is found/authenticated, we create an HTTP session, and store a certain User object in the session to tell us who the user is on the next http request. How do we introduce J2EE security into this picture. In other words, how do we tell Orion which user is logged on so that it starts using the security attributes/group/rights of the deployment descriptors? Do we need to put a special attribute into the HTTPSession so that Orion knows on behalf of what user the request is running? Thanks. -AP_
RE: How to enable UserManager support for arbitrary user...
Out of curiosity, why aren't you using SOAP? Seems like that is designed to do exactly what you want, and I'm sure there is terrific VB support for it. You can use J2EE security, but the usual paradigms for J2EE authentication aren't going to do you much good. You probably just want a login.jsp?name=xxxpassword=xxx url and from within that call RoleManager.login(). Since you have a fat client, you don't need to worry about the user trying to access a protected page without logging in; the client can be smart about what users are allowed to do. Make sure you're properly handling the http cookie returned by the server otherwise your login isn't going to "stick"... security is associated with the session, of course. IMHO, support for HTTP-based RPC in J2EE is very poor, and MS is way ahead of the game here. Jeff -Original Message- From: Alex Paransky [mailto:[EMAIL PROTECTED]] Sent: Saturday, April 14, 2001 10:03 PM To: Orion-Interest Subject: RE: How to enable UserManager support for arbitrary user... Here is the problem that I am not sure how to really fix. Our EJB application is wrapped with a number of "command" URL's which return XML results. For example: http://localhost/getAccountInformation.jsp?account=2234 would return an XML representation of an account. An http://localhost/addUserToAccount?account=2234userName=test... would add a user to a particular account. A Visual Basic client, then uses these "command" URLs and resulting XML to present a user interface. Given the above scenario, what would be your recommendation for authenticating the user starting right after I accept the user/password from the VB form (I don't much care for VB specifics, just the part which deals with EJB/JSP/J2EE security). After accepting user authentication information from a VB dialog, what should I do next. How do I get this information "registered" with Orion or any j2ee application server so that the deployment descriptor information works correctly. Is this the way J2EE security was meant to be used. A non super-user account, cannot execute a setSuperuser(boolean) function on the User bean. Is this how I should be controlling this? Is this the proper method? I was reading the J2EE EJB spec which states that coding security should be the last resort. I am not clear on how to execute the above scenario. Thanks to all the people who have already posted in regards to this issue. -AP_ -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Jeff Schnitzer Sent: Friday, April 13, 2001 10:09 PM To: Orion-Interest Subject: RE: How to enable UserManager support for arbitrary user... I suggest using an MVC (aka "Model 2") approach, separating your view from your controller. One of the controller's responsibilities can be to check for authentication and provide to the user either the requested page or the login page. If you use a dispatcher-servlet-action framework for your controller, you typically will only need to put the authentication checking code in a base action class from which all protected action classes derive. If you use JSPs as controllers you'll need some sort of code in every one (you can use @include for this). You will be much happer if you use an MVC appraoch, trust me. The J2EE automatic form-based authentication is very crude and fails to accomodate simple use cases like automatically logging in new users. You might want to look at WebWork: http://www.sourceforge.net/projects/webwork. BTW, if you use the Orion UserManager (and RoleManager), you should not do your own database lookup. Calling RoleManager.login() causes methods to be called on the UserManager, which can either be your class or one of the UserManagers that ship with Orion. DataSourceUserManager looks up password and group information in a table. Jeff -Original Message- From: Alex Paransky [mailto:[EMAIL PROTECTED]] Sent: Friday, April 13, 2001 3:20 PM To: Orion-Interest Subject: RE: How to enable UserManager support for arbitrary user... Tim, this IS what I am looking for, but does it mean that I need to put this into every .JSP page that I have? Then, somehow (according to J2EE spec) Orion will forward this information to all EJB calls and properly make use of the deployment descriptor stuff? So every .JSP page will check the session, find the User object which I stored in there, and execute this call with the user.login and user.password? Thanks. -AP_ -Original Message- From: Tim Endres [mailto:[EMAIL PROTECTED]] Sent: Friday, April 13, 2001 3:04 PM To: Orion-Interest Cc: Alex Paransky Subject: Re: How to enable UserManager support for arbitrary user... Is this what you are looking for? RoleManager roleMgr = (RoleManager) (new InitialContext()).lookup( "java:comp/RoleManager" ); roleMgr.login( "user", "pass" ); Unfortunately,
RE: productive comment.
I just wanted to point out that despite the Orion team's silence on this list, over the last couple months there has been a lot of bugzilla activity. Development is clearly moving forward, so it's not time to jump ship yet :-) While a weekly "hey, here's what's up at Ironflare" letter to this list would be nice, I think just simply echoing all bugzilla update mail to this list would go a long ways towards giving us the feeling that development has not stalled. Especially if this trend towards less frequent, bigger updates continues. Anxiously awaiting 1.4.8, Jeff
RE: productive comment.
I was under the impression that the domain has always been owned by the Orion organization. They just pointed it at whoever was willing to maintain the community site. I have a suggestion. Lets take a slice of a Wiki system, say the Portland Pattern Repository at http://www.c2.com. I think the Wiki nature will lend itself well to a community group like this. It will also act as a FAQ-O-MATIC. The natural starting point is: http://www.c2.com/cgi/wiki?OrionServer Jeff -Original Message- From: Michael J. Cannon [mailto:[EMAIL PROTECTED]] Sent: Friday, April 13, 2001 6:07 PM To: Orion-Interest Subject: RE: productive comment. Importance: High Another bit of info: From NSI WHOIS: http://www.networksolutions.com/cgi-bin/whois/whois?STRING=orio nsupport.com STRING=Search Magnus owns it now. NOW WHAT? Michael J. Cannon -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Stan Ng Sent: Friday, April 13, 2001 5:37 PM To: Orion-Interest Subject: Re: productive comment. I'm all for this idea. Orionsupport is a community support effort run on a volunteer basis and I believe that it is hosted on Joseph's development machine using Orion. :) : ) :) I'd be willing to help shoulder some of the costs in moving everything over to an ISP host. There's no need for a new domain, imho... orionsupport has been very open and supportive (no pun intended). I say that we just give those good folks a nice place to put everything without tying up their resources. Community support for Orion has been excellent. The thing I'm worried about is how the Orion developers are doing... is there anything we can do to help out the guys at orionserver/ironflare? - Original Message - From: "Michael J. Cannon" [EMAIL PROTECTED] To: "Orion-Interest" [EMAIL PROTECTED] Sent: Thursday, April 12, 2001 10:47 PM Subject: RE: productive comment. RE: How do we take the next step? A sig is, classically a _S_pecial _I_nterest _G_roup, in the computer culture. orionsig.net, orionsig.org and orionsig.com are available. Pick 'em. Don't need a license from anyone to be a 'general purpose special interest group,' as long as you don't purport to be in any 'special' circumstance or make unfounded claims or use words that have obvious legal meaning. I've got a fixed IP, but it's on a slow and restricted connection. I know an ISP that is easy to work with, charges $39/mo, knows how to run services for Java, and is relatively small and responsive, and accesses through a multiple T3 (second-tier backbone access, they're actually a small CLEC). They also are an accredited registrar for all the above TLD's (turn-around is typically about 24 hours to propagate through BIND/DNS and the internic). I'd be willing to donate the first six months worth of host costs, and, after 30 days, pay for the Orion license myself (gotta run the site on Orion, don't we?) with these guys or anyone better. Let's just DO IT. Anyone else want to help? Michael Cannon mailto: [EMAIL PROTECTED]
RE: How to enable UserManager support for arbitrary user...
I suggest using an MVC (aka "Model 2") approach, separating your view from your controller. One of the controller's responsibilities can be to check for authentication and provide to the user either the requested page or the login page. If you use a dispatcher-servlet-action framework for your controller, you typically will only need to put the authentication checking code in a base action class from which all protected action classes derive. If you use JSPs as controllers you'll need some sort of code in every one (you can use @include for this). You will be much happer if you use an MVC appraoch, trust me. The J2EE automatic form-based authentication is very crude and fails to accomodate simple use cases like automatically logging in new users. You might want to look at WebWork: http://www.sourceforge.net/projects/webwork. BTW, if you use the Orion UserManager (and RoleManager), you should not do your own database lookup. Calling RoleManager.login() causes methods to be called on the UserManager, which can either be your class or one of the UserManagers that ship with Orion. DataSourceUserManager looks up password and group information in a table. Jeff -Original Message- From: Alex Paransky [mailto:[EMAIL PROTECTED]] Sent: Friday, April 13, 2001 3:20 PM To: Orion-Interest Subject: RE: How to enable UserManager support for arbitrary user... Tim, this IS what I am looking for, but does it mean that I need to put this into every .JSP page that I have? Then, somehow (according to J2EE spec) Orion will forward this information to all EJB calls and properly make use of the deployment descriptor stuff? So every .JSP page will check the session, find the User object which I stored in there, and execute this call with the user.login and user.password? Thanks. -AP_ -Original Message- From: Tim Endres [mailto:[EMAIL PROTECTED]] Sent: Friday, April 13, 2001 3:04 PM To: Orion-Interest Cc: Alex Paransky Subject: Re: How to enable UserManager support for arbitrary user... Is this what you are looking for? RoleManager roleMgr = (RoleManager) (new InitialContext()).lookup( "java:comp/RoleManager" ); roleMgr.login( "user", "pass" ); Unfortunately, I think that can only run in the container. To accomodate multiple logins under a servlet, we used to use a new InitialContext on every servlet request and set the appropriate JNDI properties for each InitialContext construction. tim. We have developed a web application with our own user/group schema. Creating a UserManager to map our schema seems pretty trivial. What we are NOT clear on is how to tell Orion that a particular user has logged in. For example, we start our application with a LOGIN.JSP page, which accepts user name/password, and proceeds to find the user in the database. After the user is found/authenticated, we create an HTTP session, and store a certain User object in the session to tell us who the user is on the next http request. How do we introduce J2EE security into this picture. In other words, how do we tell Orion which user is logged on so that it starts using the security attributes/group/rights of the deployment descriptors? Do we need to put a special attribute into the HTTPSession so that Orion knows on behalf of what user the request is running? Thanks. -AP_
RE: Usage of the Service console...
My advice is to ignore all the GUI tools that come with Orion and stick to Ant as a build-and-deploy tool. It is my strong suspicion that nobody is using, testing, or actively developing the GUI tools. It is my personal opinion (probably shared by many on this list) that this is a good thing. I would rather see the Orion team's limited resources focused on the server core. Not that I think pretty GUI tools don't have a place, but there really is no limit to the amount of time one can sink into getting a GUI app working properly. Ant works just fine. Jeff -Original Message- From: Chaya Ramanujam [mailto:[EMAIL PROTECTED]] Sent: Thursday, April 12, 2001 12:10 PM To: Orion-Interest Subject: Usage of the Service console... I've been playing with the Service console. It took me way longer to create, install and deploy a J2ee app using the console than it did when I did everything myself on the command line (creating the directory structures, creating very simple deployment descriptors, creating the jar and war files and finally editing the server.xml and default-web-site.xml files). I know the console is said to be "alpha" quality - but was just curious - is any one out there using the console on a regular basis? Do you find it really useful? In what scenarios do you find this more useful - while creating and deploying apps or for monitoring or for redeploying apps? There seems to be a great deal of functionality in the console, however the lack of documentation/help is a big drawback. --Chaya. _ Get your FREE download of MSN Explorer at http://explorer.msn.com
RE: Creating new CMP records
If you want a CMP field that can be null, use java.lang.Integer instead of int. Jeff -Original Message- From: Eduardo Estefano Sent: Mon 4/9/2001 12:10 PM To: Orion-Interest Cc: Subject:Creating new CMP records I have a CMP EJB that has a foreign key field in it (DepartmentID). This field can be null (removed other fields for simplicity): CREATE TABLE ACTIVITY ( ACTIVITYID NUMBERNOT NULL, DEPARTMENTID NUMBER ) The ActivityID and DepartmentID are class variables of the EJB. I'm trying to create a record with no DepartmentID. But the value of the DepartmentID is always 0 (zero) because ints default to 0. The end result is a constraint error because there is no department with ID=0. My question: How can I tell orion to create the new record with a null value for DepartmentID instead of 0. - Eduardo Estefano Integrated Information Systems winmail.dat
RE: How to set the X-Window DISPLAY on Orion
You just need to configure the DISPLAY variable for the environment that Orion runs in. Are you running Orion from a script? Set the DISPLAY variable in the script. I gotta warn you though, the xvfb renders some pretty awful output. The full X server doesn't do a whole lot better, at least not when fonts are concerned. Unfortunately I have to run my server on MS to get good-looking generated images. IMHO, 75% of what's wrong with Linux is X-Windows. Jeff -Original Message- From: [EMAIL PROTECTED] Sent: Thu 4/5/2001 6:34 AM To: Orion-Interest Cc: Subject: How to set the X-Window DISPLAY on Orion Hi, We're using Oracle Reports Server on UNIX with Orion. Oracle Reports requires an X-Windows session on UNIX platforms. Basic inquiries such as font availability and font metrics are resolved through X-Windows, not just rasterization of graphic images. Reports is a bitmapped product and needs a window runtime environment. So I've set up a Virtual Frame Buffer using Xvfb I did some testing and when I set the DISPLAY=:1.0 and run xclock the virtual frame buffer works just fine. But whenever we attempt to use Reports without an Xterm running we get "can't open display". So I believe the issue is actually with the Application Server not knowing where to look for the DISPLAY. My understanding is that with Apache's JServer you can tell it to use the Xvfb instead of the the normal X server by making an entry in the jserv.properties file. How can I do this with Orion? Thanks! Rob Lent Lead Database Analyst AXA Client Services winmail.dat
RE: Bi-directional relations (my kludge)
M-N relationships do work in Orion, although not bidirectionally.
WebLogic has good support for most of the EJB2.0 spec, and there is a
product that runs on top of JBoss that allows you to deploy EJB2.0
packages (it converts everything to the 1.1 format for JBoss to
consume). I don't remember the name of it offhand, but I'm sure you'll
find it if you look through the JBoss lists.
Reid:
I've got to agree with Hani; complaining with such bitterness about the
incompleteness of Orion's EJB2.0 support is ludicrous, especially when
you consider that Orion is one of ONLY TWO servers on the market to
publicly offer *any* native EJB2.0 support.
Incidentally, rather than putting that code of yours in a separate
session bean, you can put it in the entities themselves, completely
preserving the EJB2.0 relationship method illusion. Or better yet (I
have found), you can simply hide a call to a finder within the
getEntityCollection() business methods... this allows you to leave the
relationship unidirectional in implementation.
Jeff
-Original Message-
From: Ray Harrison
Sent: Thu 4/5/2001 6:47 PM
To: Orion-Interest
Cc:
Subject: Re: Bi-directional relations (my kludge)
Hi Reid -
What App Servers currently offer m-n relationships - I'm
interested in exploring how some of them
operate.
Cheers
Ray
--- Reid Hartenbower [EMAIL PROTECTED] wrote:
I have found the lack of bi-directional support very
frustrating, and think
that it so impedes CMP functionality that it should be
qualified as a bug,
and not a pending feature.
I also don't see what the big technical challenge in
implementing it would
be.
If Orion is going to be this sluggish with support and new
features, I would
ask them to consider going open source. Let me fix it if you
won't--do you
hear me Orion guys?
My workaround is to manage the relations with a
'RelationManager' session
bean. For n-m relations, I create my join tables with
composite primary
keys, as in (for hsql):
CREATE TABLE User_Order (
userId CHAR(37)NOT NULL,
orderIdCHAR(37)NOT NULL,
PRIMARY KEY (userId, orderId));
Then in the session bean, I explicitly create both sides of
the relationship
(eg. user.addOrder(order) and order.addUser(user) ) and catch
the duplicate
key exception, as in:
user.addOrder(order);
if(NON_DIRECTIONAL_BUG) {
try {
order.addUser(user);
}
catch(EJBException e) {
// for Orion 1.4.7 bidirectional bug;
}
}
When (if) Orion fixes this bug, the modifications to my code
will be slight.
- Original Message -
From: "Ray Harrison" [EMAIL PROTECTED]
To: "Orion-Interest" [EMAIL PROTECTED]
Sent: Thursday, April 05, 2001 10:50 AM
Subject: Re: Bi-directional relations
Nope.
--- Patrik Andersson [EMAIL PROTECTED] wrote:
Does bi-directional relations work yet? I'm pretty sure it
did not work
the
last time I tried, but that was a fix fix versions ago.
Any news on this issue?
regards,
Patrik Andersson
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RE: findByXXX() with an ORDER BY parameter for Container-managed bean ?
From: Markus Holmberg [mailto:[EMAIL PROTECTED]] You are relying on an implementation detail of your container. The reason it has worked for you so far is because your container has used an instance of java.util.ArrayList/LinkedList, which indeed does guarantee order. But CMP Entity EJB's finder methods do not return java.util.List's! They return java.util.Collection. Your functionality will break when the container changes it's implementation. I'll bet a case of beer that you can't find a J2EE server that uses an unordered implementation for the Collection :-) I would guess that Orion actually walks the RowSet from the Iterator rather than trying to shove everything into core first. Otherwise finders are going to choke on big queries. I think assuming this behavior is reasonably portable. My only worry is whether or not other app servers let you customize the finder sql so easily. Jeff
RE: Servlet blues
By default, a single instance of your servlet will be created by the container to service all requests. The doGet() is not synchronized so it must be written thread-safe. Alternatively, you can have your servlet implement the SingleThreadModel interface. This instructs the container to create a pool of servlets and synchronize access to them. I do a lot of image generation from servlets, but since I have a reasonably finite quantity of images I don't bother with SingleThreadModel and just cache them in a synchronized HashMap. The overhead of creating the ImageBuffer, etc for the first instances is small. BTW, you might want to use the free Acme GIFEncoder (http://www.acme.com) instead of Sun's jpeg encoder. I believe the jpeg encoder is only available in the Sun JVM and jpeg encoding is pretty lousy for flat expanses of color anyways. Jeff -Original Message- From: Huibert Aalbers Indaberea [mailto:[EMAIL PROTECTED]] Sent: Friday, March 30, 2001 9:53 AM To: Orion-Interest Subject: Servlet blues Hi everyone, I have written a servlet that dynamically generates an image using Orion. Everything works fine under light load. However, under heavy load, when multiple users are using it simultaneously, it fails, presenting erroneous data. Does every request instantiate a new servlet class or is the same one shared? Is the doGet method synchronized? Is this behaviour specific to Orion? In a related question, sometimes, under heavy load i get the following exception: java.io.IOException: reading encoded JPEG stream at sun.awt.image.codec.JPEGImageEncoderImpl.writeJPEGStream(Native Method) Has anyone seen this problem before? Thanks a lot for your help. Huibert
RE: RMI/IIOP support in orion...
You want an appserver that uses RMI-IIOP natively. Orion isn't one of these. You would have to write an intermediate server that translates all CORBA/IIOP calls into EJB/ORMI calls. You will more than save on development costs by just spending the money up front for an IIOP-based server like BEA or Borland. If you have CORBA clients, Orion is probably not the right tool for you. Jeff -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] Sent: Tuesday, April 03, 2001 2:40 PM To: Orion-Interest Subject: RMI/IIOP support in orion... Hi, I am relatively new to appserver... We are thinking of hosting a telecom app on an appserverThe inetrface is to the eventual users of this application(s) has to be CORBA... so, please advice me on options available to us : Assuming that we would have a set of EJBs , how would a client that uses CORBA bind to these? Thanks in advance... Jobin Thomas [EMAIL PROTECTED]
RE: Concurrent modification
ConcurrentModificationException is the result of a fail-fast iterator in the JDK 1.2+ collections framework. If one thread is iterating a collection and another thread modifies the collection, the next call to the iterator will immediately throw this exception. In the ugly old days of Hashtable and Vector, the results of concurrent modification were undefined. You need to rethink your synchronization strategy for whatever shared data you are initializing in initsequence.jsp. Jeff -Original Message- From: Ing. Nicola Folino [mailto:[EMAIL PROTECTED]] Sent: Friday, March 30, 2001 12:36 AM To: Orion-Interest Subject: Concurrent modification I have a web application with some jsp pages. If I click twice on a link to another jsp page, I get the exception: java.util.ConcurrentModificationException at java.util.HashMap$HashIterator.next(Unknown Source) at java.util.Collections$6.nextElement(Unknown Source) at __jspPage21_initsequence_jsp._jspService(__jspPage21_initsequence_jsp .java:38) at com.orionserver.http.OrionHttpJspPage.service(JAX) at com.evermind.server.http.HttpApplication.xj(JAX) at com.evermind.server.http.JSPServlet.service(JAX) at com.evermind.server.http.d3.sw(JAX) at com.evermind.server.http.d3.su(JAX) at com.evermind.server.http.ef.s1(JAX) at com.evermind.server.http.ef.do(JAX) at com.evermind.util.f.run(JAX) Keep in mind that go to the other link through an intermediate page which uses the directive jsp:forward page="somePage". The same application runs perfectly on JRun, but I saw that Allaire J2EE Server moves from standard, so I'd like to develope on Orion... Thanks
RE: Implementation inheritance with ejb...
I don't think you can have an inheritance structure like this. When you
define the parent relationship, the EJB container wants a method
'abstract Category getParent()' which does not exist.
I have a similar tree structure without the inheritance (also called
'Category'), and it works with some caveats. Watch out for the lack of
support for bidirectional relationships; I only store the parent
relationship and implement the getCategoryChildren() business method
with a call to ((CategoryHome)getEJBHome()).findByParent(). There are
other ways but I found this to be the most pleasant.
Inheritance wasn't really designed into the EJB specification. You can
use interface inheritance, but otherwise you're asking for pain.
Jeff
-Original Message-
From: Alex Paransky [mailto:[EMAIL PROTECTED]]
Sent: Thursday, March 29, 2001 7:32 PM
To: Orion-Interest
Subject: Implementation inheritance with ejb...
I have a general concept of a TreeNode which could contain a
parent (another
TreeNode) and some children, a Collection of TreeNodes. So I
have defined a
basic TreeNode such as:
public class TreeNode ... {
public void setParent(TreeNode parent) throws RemoteException;
public TreeNode getParent() throws RemoteException;
public void setChildren(Collection children) throws RemoteException;
public Collection getChildren() throws RemoteException;
}
My TreeNodeBean, has the appropriate abstract functions.
Now, I have something called Category, which has a parent/children
relationship with other categories. So, when creating a
Category, I defined
it like this:
public interface Category extends TreeNode {
public String getName() throws RemoteException;
public void setName(String string) throws RemoteException
}
similary, I defined a CategoryBean as an abstract class which
is based on
TreeNodeBean, with the additional abstract functions to
get/set name. I
have created a one-to-many relationship between Categories,
using parent to
specify the parent for particular category, and children to
indicate the
children Collection.
When I try to deploy the Category bean, I get the following
exception from
Orion during deployment:
Auto-deploying model (ejb-jar.xml had been touched since the previous
deployment)... java.lang.NullPointerException
at
com.evermind.server.ejb.deployment.ContainerManagedField.aep(JAX)
at com.evermind.server.ejb.database.fj.afk(JAX)
at com.evermind.server.ejb.compilation.gf.ah9(JAX)
at com.evermind.server.ejb.compilation.f9.ah9(JAX)
at com.evermind.server.ejb.compilation.f9.s7(JAX)
at com.evermind.server.ejb.compilation.gf.s7(JAX)
at com.evermind.server.ejb.EJBContainer.b_(JAX)
at com.evermind.server.Application.b_(JAX)
at com.evermind.server.Application.gj(JAX)
at com.evermind.server.ApplicationServer.r2(JAX)
at com.evermind.server.ApplicationServer.aq0(JAX)
at com.evermind.server.ApplicationServer.gj(JAX)
at com.evermind.server.hk.run(JAX)
at java.lang.Thread.run(Thread.java:484)
at com.evermind.util.f.run(JAX)
Is this normal? What does this exception mean?
Thanks.
-AP_
RE: Collection Finders With Entity Argument Always Return Empty Collection
Try reversing the order of the fields in the primkey-mapping block for
the bean in the orion-ejb-jar.xml. Might also work just to change the
order in the ejb-jar.xml, especially if you deploy from scratch.
Jeff
-Original Message-
From: Peter Pontbriand [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, March 28, 2001 7:51 AM
To: Orion-Interest
Subject: Re: Collection Finders With Entity Argument Always
Return Empty
Collection
Hmm. it seems a good under-desk gibbering session is helps
focus the brain.
Once that was over with, I copied the generated finder code
(below) into an
EJB of my own and executed it, getting the same results - not
rows in the
ResultSet. I then wasted a whack of time trying to lay my
eyeballs on the
actual final SQL statement being tossed at the database. No
luck there, no
amount of downcasting to assorted Oracle JDBC Driver Statement
classes would
produce a way to get a human readable parameterized SQL statement. No
matter, though, since by chance I spotted the problem in the
generated code:
THE ORION-GENERATED CODE REVERSES THE ORDER OF THE STATEMENT
PARAMETERS!!!
Notice the criteria in the where clause: first is
CatalogEntryEJB.catalogIdentity, second is
CatalogEntryEJB.catalogLocale.
These are the two fields of the composite primary key of CatalogEJB, a
String and a Locale respectively.
Now look at the code that inserts the values for these parameters:
First is: statement.setString(1,
com.evermind.util.ObjectUtils.toString(primaryKey398.locale));
And second is: statement.setString(2, primaryKey398.identity);
The locale is being inserted where the identity should be, and
vice-versa.
Bugzilla Bug #379 has been posted. Anybody got a
non-stomach-churningly-ugly
workaround idea?
P. Pontbriand
Canlink Interactive Technologies, Inc.
- Original Message -
From: "Peter Pontbriand" [EMAIL PROTECTED]
To: "Orion-Interest" [EMAIL PROTECTED]
Sent: Tuesday, March 27, 2001 12:27 PM
Subject: Collection Finders With Entity Argument Always Return Empty
Collection
java.sql.PreparedStatement statement =
connection.getCustomStatement("select
CatalogEntryEJB.identity, CatalogEntryEJB.catalogIdentity,
CatalogEntryEJB.catalogLocale, CatalogEntryEJB.label,
CatalogEntryEJB.targetRoleIdentity,
CatalogEntryEJB.referenceidentity,
CatalogEntryEJB.price, CatalogEntryEJB.discountRate,
CatalogEntryEJB.parentreferenceidentity,
CatalogEntryEJB.referenceTypeInt,
CatalogEntryEJB.productCode, CatalogEntryEJB.description,
CatalogEntryEJB.extendedDescription, CatalogEntryEJB.listIndex,
CatalogEntryEJB.created, CatalogEntryEJB.creator,
CatalogEntryEJB.modified,
CatalogEntryEJB.modifier from CatalogEntryEJB where
CatalogEntryEJB.catalogIdentity = ? and
CatalogEntryEJB.catalogLocale =
?");
try {
com.canlink.components.base.LocalizedEntityPK primaryKey398 =
argument0 == null ? null :
((com.canlink.components.base.LocalizedEntityPK)
argument0.getPrimaryKey());
{
if (primaryKey398 == null) {
if (((java.util.Locale) null) == null)
statement.setNull(1,
java.sql.Types.VARCHAR);
else
statement.setString(1,
com.evermind.util.ObjectUtils.toString(((java.util.Locale) null)));
if (((java.lang.String) null) == null)
statement.setNull(2,
java.sql.Types.VARCHAR);
else
statement.setString(2, ((java.lang.String) null));
}
else {
if (primaryKey398.locale == null) statement.setNull(1,
java.sql.Types.VARCHAR);
else
statement.setString(1,
com.evermind.util.ObjectUtils.toString(primaryKey398.locale));
if (primaryKey398.identity == null) statement.setNull(2,
java.sql.Types.VARCHAR);
else
statement.setString(2, primaryKey398.identity);
}
}
}
finally {
}
java.sql.ResultSet set = statement.executeQuery();
while (set.next()) {
}
RE: What versions of Postgres are people using?
I'm using Postgresql 7.0.3 on RH7 with pleasant results (except the JDBC driver's timstamp issue). I don't serialize any objects as BLOBs though. Why do you want to do this? Jeff -Original Message- From: Julian Richardson [mailto:[EMAIL PROTECTED]] Sent: Wednesday, March 21, 2001 7:28 AM To: Orion-Interest Subject: What versions of Postgres are people using? Hi, Following on from my earlier questions about alternatives to Hypersonic, a few people recommended Postgres. Well, I'd been meaning to try Postgres generally for a long time anyway, so downloaded the latest version from the site (703) and installed it. Orion wouldn't run with it, complaining about lack of binary object support (fair enough given that looking inthe JDBC source reveals that it's not implemented in 703!). Thing is, I was talking to the guy who wrote the Postgres drivers and it sounds like there was no stream support in 6.5 either; this is new in 7.1 (which isn't released yet). But Orion must require the use of somthing like this to store serialized data, surely? So what are the people on the list who use Postgres actually using? Have you patched the JDBC drivers to work, or did someone release patched 6.5 drivers for Postgres which everyone's installed? Or have you modified Orion to serialize data using some other mechanism to the default? I imagine most people on the list are using 6.5 rather than 7.0.3? Confusing, to say the least... cheers Jules
RE: bad timestamp confusion
Take a look at this message I posted in January: http://www.mail-archive.com/orion-interest@orionserver.com/msg08677.html If you patch the JDBC driver to read whatever format your dates are coming back as (you should see the actual formatted date string in the exception message), you should be ok. You might first check the CVS copy of the JDBC driver to see if it works; with any luck patches have already been made. Storing dates as strings just seems like a bad idea. It's nice to be able to do date math in SQL queries when you want to analyze your data. Jeff -Original Message- From: Eddie [mailto:[EMAIL PROTECTED]] Sent: Wednesday, March 21, 2001 4:55 AM To: Orion-Interest Subject: bad timestamp confusion Just like other people in the newsgroup, I am receiving a bad timestamp error once in a while with Postgres 7.0. I looked in the newsgroup and saw some possible solutions, but I am a bit confused. How can I solve this problem for ever in case of a DateTime field ??? Someone talked about using java.sql.Date instead of java.util.Date, the other about getting the last postgres jdbc driver I got the last postgres driver from the postgres site, so what should I do ?? I was thinking about just using Strings to store Date format info. What about this ? And what should I do when I get such an error. Filling the database all over again helps. But what, when I have everyting ready online ?? Regards, Eddie
RE: bad timestamp confusion
There are instructions for obtaining the latest source tree via anonymous CVS here: http://www.postgresql.org/devel-corner/docs/postgres/cvs.html Just get the whole thing :-) There are instructions for building the JDBC driver in the README file in the directory you found. Good luck, Jeff -Original Message- From: Eddie [mailto:[EMAIL PROTECTED]] Sent: Wednesday, March 21, 2001 1:56 PM To: Orion-Interest Subject: Re: bad timestamp confusion Thanks Jeff, H, I am a bit confused, again. I went searching for the correct postgres jdbc driver, and don't know exactly where to get the last version and source (I thought I did). I seached on http://jdbc.postgresql.org/download/ but is that the correct site ? and where can I get the source as I can't find it. I searched on http://www.postgresql.org/cgi/cvsweb.cgi/pgsql/src/interfaces/j dbc/, but there I only have a complete three and don't realy know what to download. Regards, Ed Bras - Original Message - From: Jeff Schnitzer [EMAIL PROTECTED] To: Orion-Interest [EMAIL PROTECTED] Sent: Wednesday, March 21, 2001 8:08 PM Subject: RE: bad timestamp confusion Take a look at this message I posted in January: http://www.mail-archive.com/orion-interest@orionserver.com/msg0 8677.html If you patch the JDBC driver to read whatever format your dates are coming back as (you should see the actual formatted date string in the exception message), you should be ok. You might first check the CVS copy of the JDBC driver to see if it works; with any luck patches have already been made. Storing dates as strings just seems like a bad idea. It's nice to be able to do date math in SQL queries when you want to analyze your data. Jeff -Original Message- From: Eddie [mailto:[EMAIL PROTECTED]] Sent: Wednesday, March 21, 2001 4:55 AM To: Orion-Interest Subject: bad timestamp confusion Just like other people in the newsgroup, I am receiving a bad timestamp error once in a while with Postgres 7.0. I looked in the newsgroup and saw some possible solutions, but I am a bit confused. How can I solve this problem for ever in case of a DateTime field ??? Someone talked about using java.sql.Date instead of java.util.Date, the other about getting the last postgres jdbc driver I got the last postgres driver from the postgres site, so what should I do ?? I was thinking about just using Strings to store Date format info. What about this ? And what should I do when I get such an error. Filling the database all over again helps. But what, when I have everyting ready online ?? Regards, Eddie
RE: Why Entity EJBs?
I also am questioning entity beans, after 5 months of intensive development with them. If you run Hypersonic in server mode and watch the sql output to the console, it should be readily apparent why... CMP produces *WAY* too many queries for fine-grained entity beans. The biggest problem is finder methods. Since all beans are lazy-loaded, iterating through the finder results of 1000 beans will produce 1001 SQL calls. There isn't any reason specwise that beans cannot be eager-loaded, but few (if any) appservers seem to support this. Does anyone know if there is any support for eager-loading of finder results in Orion? There doesn't appear to be from the documentation. I'm really disappointed in the entity bean concept. CMP should give us faster development times, faster code (with caching), and database independence, but at the moment we get *none* of the above. By stating in the blueprints that entity beans should only model course-grained objects and _not_ "one row of the table" they are effectively saying DO NOT USE CMP, because what is a CMP bean if not one row of a table? I noticed that most of the new J2EE patterns Sun recently posted are aimed at BMP. Sun's schizophrenia on this really pisses me off; with one face they like to show off entity beans and CMP because MS doesn't have it, with another they tell us to go back to the bronze age of handwritten SQL because the technology doesn't work. Gr. Jeff -Original Message- From: Dan North [mailto:[EMAIL PROTECTED]] Sent: Tuesday, March 20, 2001 4:41 AM To: Orion-Interest Subject: Fwd: Why Entity EJBs? Hi Johan. two-pence-worth I've been developing EJBs in a very (a) intensive and (b) short development cycle for about 5 months now. I've found that my methodology has leant towards what the JRF guys are talking about, but in a less formal way. From the backend forwards: I tend to use entity beans for storing/retrieving and most manipulation of data - ie. I have quite "fat" beans rather than just purely getters and setters. I then use session beans for workflow that doesn't seem to belong with any particular single bean, such as generating reports or anything that requires a few home interfaces' finders. I also use session beans for their transactional integrity when populating new beans from an HTML (JSP) form, especially when several beans will be created from a single form's contents and I want the whole lot to be atomic. We tend to use JSP and regular form beans for most of the other workflow stuff, and sometimes we'll have quite complex finder methods in the EJBs that join across several tables. The benefits to EJBs, and specifically orion, for me are: - Database independence: we're deploying on MS SQL Server but it's trivial to deploy to eg. Oracle for scalability or Hypersonic for local testing. - Network independence: I need to change no code to cluster orion on several hosts and also to split its responsibilities between being a web server on one host talking to another orion instance being an app server on another host. - Speed of development: I don't have to worry about how or where my data is being stored - I have orion's _fantastic_ OR mapping to do that for me. It seems to me that the JRF is taking the "best practice" approach, which is a fine and noble thing to do, but then overcomplicating the issue by wandering off into its own specification. All my SQL for each package is in one place (orion-ejb-jar.xml), and I don't have to worry about scalability or portability. If it says J2EE on the box, it'll usually have J2EE in the box. (Apart from the usual niggles with app servers being behind spec - again orion is pretty good for being up-to-date in this regard.) So I have all the benefits of JRF but with the backing of a technology as widely-adopted as J2EE. /two-pence-worth Disclaimer: I don't work for orion, I just love their product. And J2EE has been the most useful technology I've discovered since I picked up OO about 10 years ago! Regards, Dan. ps. That passage in the EJB book about having a session bean talk straight to a database is again (imo) a throwback to the technology being pretty immature and inefficient when the book was written. I have had no problems with orion's ability to manipulate and cache data for me comparably well with direct database access - but with the added benefit of lots of data integrity checking and no SQL on my part. In fact you get two levels of caching - the database and the app server. Date: Tue, 20 Mar 2001 09:22:52 +0100 (CET) From: Johan Lundberg [EMAIL PROTECTED] Subject: Why Entity EJBs? To: Orion-Interest [EMAIL PROTECTED] X-Mailer: Orion ListServer Reply-To: Orion-Interest [EMAIL PROTECTED] Sender: [EMAIL PROTECTED] X-MIME-Autoconverted: from 8bit to quoted-printable by druid.evermind.net id KAA23094 Hi The more I study the J2EE technology, the more I wonder why I should use it.
RE: Why Entity EJBs?
A! You are absolutely right, and I marvel at my own foolishness! It was something in my code that made it look like finders were issuing n+1 calls. That, combined with my expectation of trouble because this question (about n+1 sql calls for a finder) comes up with some regularity on the ejb-interest mailing list. I don't think many of the (other) appserver vendors have a satisfactory solution. My faith in CMP has been restored. I'm finding that hacking around case-sensitivity in String values is annoying, but it still beats handwriting SQL. Thanks Magnus! It's too bad that Sun doesn't espouse this same line of thought; it's pretty clear to me now that the arguments against fine-grained entities are largely a product of deficient container implementations. This should be a FAQ. Jeff -Original Message- From: Magnus Stenman [mailto:[EMAIL PROTECTED]] Sent: Tuesday, March 20, 2001 10:33 AM To: Orion-Interest Subject: Re: Why Entity EJBs? Orion should execute one SQL query for a finder (even with 1000 rows) unless: You're using BMP. You're using exclusive-write-access="false" and are outside of a TX. BMP is less than slim when it comes to SQL activity, we generally recommend CMP unless the condition is exceptional. Another "common mistake" in EJB usage is not using transactions. The same code can generate 100x+ as many calls when run outside of a TX as inside a TX. Why this is specific to EJB is that EJB treats data integrity very carefully, while your "home brewed" (hope that word isnt offensive) access may delay persistance into larger chunks etc (a "semi TX"). So: avoid exclusive-write-access="false" unless absolutely needed, use CMP if possible, and identify where your app is really "TXs" logically but isnt defined to be. What you get: cleaner and more easily abstracted code if all goes well. Transactional (and distributed, stay tuned some longer for that to come clustering doc) cache (it is fairly easy to make a cache, but another issue alltogether to make a transactional cache that scales, totally different tasks). More ease in code migration between programmers since you're closer to the "default", more of the backbone has been provided/standardized. Weakest side of entities as of now: batch updates. No candidate to that one, it is the biggest limitation (but can be worked around). As for "general design standpoint" it is usually not good custom for a vendor to push a practice; but we can say as much as that our recommendations are pretty much in line of those described by Dan North in a recent reply to this thread (CMP, logic in entities that apply to that entity - ignore the recommendation stating that they're simply data storage items, they're objects, and inter-bean logic in sessions). Just a short note... we rarely mix into this category of discussions (the ones bordering on religious beliefs ;) but I thought I'd shed some technical light on some of the issues - everyone's free to chose their own architecture, but it's sad when it's done due to lack of knowledge of architecture X's facts and benefits. Have a nice day! /Magnus Stenman, the Orion team PS. On the issue of "coarse grained" - entities fit perfectly well for fine grained access, but this is a political battle. You may have heard rumours about "local" entities, which consist more or less of entities allover but "allowed for fine grained access" this time. Our current position on that matter is that locals are superflous, what needs to change is just the notion of EJBs always being coarse grained. This is, of course, a very preliminary position. If there turns out to be genuine technical merits for the separation (things that cannot be done feasably via switch tags in the descriptor, see for instance copy-by-value in orion-ejb-jar.xml) that weight enough we'll reposition. /Magnus Stenman, the Orion team - Original Message - From: "Jeff Schnitzer" [EMAIL PROTECTED] To: "Orion-Interest" [EMAIL PROTECTED] Sent: Tuesday, March 20, 2001 6:31 PM Subject: RE: Why Entity EJBs? I also am questioning entity beans, after 5 months of intensive development with them. If you run Hypersonic in server mode and watch the sql output to the console, it should be readily apparent why... CMP produces *WAY* too many queries for fine-grained entity beans. The biggest problem is finder methods. Since all beans are lazy-loaded, iterating through the finder results of 1000 beans will produce 1001 SQL calls. There isn't any reason specwise that beans cannot be eager-loaded, but few (if any) appservers seem to support this. Does anyone know if there is any support for eager-loading of finder results in Orion? There doesn't appear to be from the documentation. I'm really disappointed in the entity bean concept. CMP
RE: Dependents remove not supported
Nevermind pd1 vs pdf support; *this* should seriously make you
reconsider using dependent objects:
http://www.mail-archive.com/ejb-interest@java.sun.com/msg16733.html
http://www.mail-archive.com/ejb-interest@java.sun.com/msg16733.html
Jeff
-Original Message-
From: Christian Billen [mailto:[EMAIL PROTECTED]]
Sent: Monday, March 19, 2001 7:52 AM
To: Orion-Interest
Subject: RE: Dependents remove not supported
Thanks, I found it 9.4.4.2 page 119 in EJB2.pdf, and tried to use it by
putting the method remove in my DO :
abstract remove();
however Orion doesn't seem to support it and pukes on startup:
"Illegal abstract method in dependent class com.mytest.ejb.MyDo: public
abstract void com.mytest.ejb.MyDo.remove()"
bummer! that seriously make me reconsider using the whole thing, or is
my method signature incorrect?
Christian
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of Tim Drury
Sent: Sunday, March 18, 2001 1:58 PM
To: Orion-Interest
Subject: RE: Dependents in 1-N don't go away
You may want to look at 9.4.4.2 in the proposed final draft which
defines the
remove() function of a DO. I don't have PD1 to tell you what section it
is there.
-tim
-Original Message-
From: Christian Billen [mailto:[EMAIL PROTECTED]]
Sent: Sunday, March 18, 2001 12:30 PM
To: Orion-Interest
Subject: RE: Dependents in 1-N don't go away
Is that remove() method an abstract method to be implemented in the DO?
they inherit Object and the only required method to implement on them is
the deepCopy(), I don't see where the remove() method is or come from.
Since they are Depedent by nature shouldn't the remove call on the
parent set or collection remove them permanently as well in the design?
maybe it is a bug in Orion ?
Thanks,
Christian
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of Tim Drury
Sent: Sunday, March 18, 2001 10:25 AM
To: Orion-Interest
Subject: RE: Dependents in 1-N don't go away
I understand. You have removed the DO from the parents list, but you
have not removed the DO from the database. This is because you did
not call the removed method of the DO. Try:
getDependents().remove(dependent); // remove DO from parent's list
dependent.remove(); // remove DO from database/container
-tim
-Original Message-
From: Christian Billen [mailto:[EMAIL PROTECTED]]
Sent: Saturday, March 17, 2001 9:29 PM
To: Orion-Interest
Subject: RE: Dependents in 1-N don't go away
Hi Tim, thanks for the info, by my problem is different
my issue is I want to remove a dependent from the java.utill.Set in its
parent object and that if I call getDependents().remove(dependent) from
the parent object the dependent doesn't go away from the list (even
though it has been found since I implemented the equal method)
Any help on this is really greatly appreciated.
Thanks,
Christian
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of Tim Drury
Sent: Saturday, March 17, 2001 9:10 AM
To: Orion-Interest
Subject: RE: Dependents in 1-N don't go away
Dependent objects (DO) do not go away automatically.
There is an un-implemented option in the deployment
descriptor called cascade-delete, but alas, it is
unimplemented.
The DO life-cycle is one of the main issues with DOs
in the spec and one reason they may be changed.
For now, just implement ejbRemove in your entity
and DOs so they call the remove of their children.
-tim
-Original Message-
From: Christian Billen [ mailto:[EMAIL PROTECTED]
mailto:[EMAIL PROTECTED] ]
Sent: Friday, March 16, 2001 7:43 PM
To: Orion-Interest
Subject: Dependents in 1-N don't go away
Hi everyone,
I am having an issue with my 1-n dependents relationship. My
dependents
don't get deleted when I remove them from the cmr Set.
I have a PhoneNumber dependent class which has a field type,
countrycode,
number, etc...
I implemented the equal method in my class such that two
phonenumber having
the same type are equal, these type being like "business",
"fax", "cell",
etc
Now I have an ejb class, the Customer ejb, which has :
abstract PhoneNumber createPhoneNumber()
abstract Set getPhoneNumbers()
abstract void setPhoneNumbers(Phonenumber n)
void addPhoneNumber(String type, String areaCode, ...)
{
PhoneNumber p = createPhoneNumber();
//Remove an existing phone
//*1
getPhoneNumbers().remove(phoneNumber);
//*2
getPhoneNumbers().add(phoneNumber);
//*3
}
Basically since my phonenumber equals on type, the desired
effect is I want
to wipe out a previous phonenumber of the same type before
adding the new
one.
My problem is that I can see the phoneNumber being
successfully removed from
the list by putting debug calls at *1,*2 and *3 that checks on
getPhoneNumbers.size() ...and the method commits
RE: Questions regarding 1-n bi-directional relationships...
As of version 1.4.7, bidirectional relationships are not yet supported by Orion. Jeff -Original Message- From: Alex Paransky [mailto:[EMAIL PROTECTED]] Sent: Friday, March 16, 2001 5:26 PM To: Orion-Interest Subject: Questions regarding 1-n bi-directional relationships... I have an entity called Account, and User. One Account can have many Users (bi-directional relationship). When I add a new User to the Account, the relationship table gets updated, but the AccountId field in the User table is not updated. Is this normal? It thought that account.getUsers().addUser(user) should BOTH update the relationship table and configure the accountId field in the User table. Can someone verify this? Thanks. -AP_
RE: Why is Hypersonic SQL still being integrated
Why not? Really, as a simple test/example database, what shortcoming does it have? Just because nobody is fixing/adding new bugs to the code at the moment doesn't mean that the current incarnation is not perfectly adequate for its task. I don't think anyone in their right mind would run a production system with hsql, but for development I've never used anything so convenient. Having the sql spit out to the hypersonic console in server-mode is great! Jeff -Original Message- From: Kemp Randy-W18971 [mailto:[EMAIL PROTECTED]] Sent: Wednesday, March 14, 2001 6:36 AM To: Orion-Interest Subject: Why is Hypersonic SQL still being integrated If HypersonicSQL is a dead project, why is it still being shipped with Orion?
RE: Using another EJB as part of the Primary Key Class
It works for me. I have an entity whose PK is a compound of two CMR 1-N fields. HOWEVER, I'm only using Collection mapping, not Set (which it looks like you're using). If you can't figure out what's wrong with your code, try using Collection and see if that fixes the problem. I would like to use Set and Map and all those cool interfaces too, but (aside from whether or not they work) they are not portable. Unfortunately the latest iteration of the spec only provides for java.util.Collection. :-( Jeff -Original Message- From: Christian Billen [mailto:[EMAIL PROTECTED]] Sent: Tuesday, March 13, 2001 1:39 PM To: Orion-Interest Subject: Using another EJB as part of the Primary Key Class Hi everyone, Can one specify another EJB Entity object as part of the primary key for one ejb? Here is a imaginary example: TreeEJB has a one to many relationship to AppleEJB And I have a primary key for AppleEJB which contains TreeEJB and a AppleID In my application when I tried to do something similar to the figurative example above I got: Apple_ORSet295.java:294: Exception java.rmi.RemoteException must be caught, or it must be declared in the throws clause of this method. I can't quite model this as a dependent relationship because I might be refering this AppleEJB from other EJB. Now my question: is this a bug or is it something I should not be doing? how else could I model that an apple must be unique within its tree? suggestions? Thanks, Christian
Orion Team Needs New List Software
Someone desperately needs to replace the list software currently hosting the Orion-Interest mailing list. This is really getting out of hand. It's bad enough that everyone who posts gets messages like this from natch.se... but now they're echoing to the list as well. If the only reason this hasn't been done is lack of suggestions, I've found use (no idea about administration) of Mailman lists to be pleasant. http://www.list.org. Somebody also needs to fix the Orion website so that when you click "unsubscribe", it gives a response page to that effect rather than the current erroneous "Thank you for subscribing" message. This is probably what generates most of the "how do I unsubscribe?" messages to the list. Jeff -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] Sent: Wednesday, March 14, 2001 11:31 AM To: Orion-Interest Subject: Re:Why is Hypersonic SQL still being integrated Sir or Madame- I am no longer available to receive email at this address. Please forward all email requests and/or information to [EMAIL PROTECTED] and/or [EMAIL PROTECTED] Thank you. ___ James M. Morgenstein VP Technology Digital Demographics, Inc. Home of Recommend-It (r) http://www.recommend-it.com (voice) 732-296-8885 (fax) 732-296-8817 Recommend-It (r): The Internet's hottest website traffic generation service. Completely free for surfers and website owners. More than 100,000 members and over 3 million newsletter subscriptions in over 220 countries and growing!
RE: Customizing CMP deployment
You can put fragments of orion-ejb-jar.xml in your deployment package. It should go in a directory called "orion" sibling to META-INF. Check the list archives for more details. FYI, you can do the same thing with orion-application.xml, but it goes in the ear's META-INF directory. Very useful. Good luck, Jeff -Original Message- From: Sergei Batiuk [mailto:[EMAIL PROTECTED]] Sent: Monday, March 12, 2001 7:51 AM To: Orion-Interest Subject: Customizing CMP deployment Is there any way to customize deployment of CMP bean - to indicate the table name in the database to which the entity bean should map its persistence (in case the name of the table is different from the bean name) or the data source to connect to. As far as I know orion-ejb-jar.xml is responsible for these properties, but it has no effect ibefore/i the deployment. Is there an orion-specific (or some other) way to deliver such information to the container?
RE: Design Advice (And Orion JNDI syntax) Needed
Do these strings need to change dynamically without app redeployment?
If it's just error messages and the like, why not use
java.util.ResourceBundle?
String msg = ResourceBundle.getBundle("mymessages").getString(MSG_KEY);
You can store the resources in any format you like if you implement your
own ResourceBundle subclass, or you can use a .properties file. If you
pass in the cool Orion classloader I believe it will dynamically reload
the data, too. Check the javadocs.
Jeff
-Original Message-
From: Neal Kaiser [mailto:[EMAIL PROTECTED]]
Sent: Monday, March 12, 2001 4:41 PM
To: Orion-Interest
Subject: Design Advice (And Orion JNDI syntax) Needed
Hello;
Problem: My application has many text strings (i.e. email
messages, email
recipient addresses, canned messages, etc) that both my
servlets and EJBs
need to access. It needs to be done in a way that these are
not hardcoded
and can be accessed easily from servlets, ejbs, and possibly
even standalone
applications.
My Solution: Have a MessageResources object that is created by
a startup
servlet that contains all these strings. You can then use a
MessageResources.getValue(String) to get the desired string
you want. This
is all done, the startup servlet runs, reads in the XML file,
and creates
the MessageResources.
My Problem: I now need a way to pass that MessageResource
object into scope
so it is accessible by Servlets and EJBs (I'll worry about standalone
applications later).
However, I somehow need a way for the Stateless session bean
to get this
MessageResource object. I can't do StartupServlet.getMR()
because the EJBs
might be remote.
Is it possible to use JNDI and store an object? IF that is the
case, then I
could do something like this in my stateless session bean:
public String getMessage(String key) {
if (messageResources == null) {
// lookup messageResources with JNDI
}
}
How would I do this in OrionServer? I believe it is app server
specific,
right?
Does anyone have any input? Is it the right way to do it?
This must be a
common problem (global variables needed). How is everyone else
doing this?
RE: Case insensitive primary keys
Thanks for everyone's comments. From: Rafael Alvarez [mailto:[EMAIL PROTECTED]] You can do two things: .- In the EJBCreate change the user name to Upper or Lower case when setting it. Also in the PK class change it to Upper or Lower case. Not a good solution for me, because I want to preserve case. I don't want to maintain a second field with the correct case; I might as well use an integer key. .- Override the PK class equal() method, to compare the username in Upper(Lower)case. How does this work? Doesn't the database need to be made aware of the insensitivity? How would finders work? I'm confused about how an app server handles this. Any information would be very helpful :-) Thanks, Jeff Thursday, March 08, 2001, 7:30:39 PM, you wrote: JS I have a primary key which is a string (user's name), and I would like JS it to be case-insensitive. That is, if there is already a "bob" entity, JS trying to create a "Bob" entity should throw a DuplicateKeyException. JS Is there a way I can do this with Orion? JS I vaguely recall reading something in the documentation about this, but JS now I can't seem to find it. I'm starting to think that I imagined it. JS Thanks, JS Jeff -- Best regards, Rafaelmailto:[EMAIL PROTECTED]
Case insensitive primary keys
I have a primary key which is a string (user's name), and I would like it to be case-insensitive. That is, if there is already a "bob" entity, trying to create a "Bob" entity should throw a DuplicateKeyException. Is there a way I can do this with Orion? I vaguely recall reading something in the documentation about this, but now I can't seem to find it. I'm starting to think that I imagined it. Thanks, Jeff
RE: Problem retrieving dependents after Orion restart
IMHO, it is unwise to be using EJB2.0 dependent objects at this point because this is a part of the spec which is likely to change wildly. There have even been significant changes between pd1 (when Orion's implementation was built) and pfd. You can circumvent the relationship table by creating a unidrectional relationship from Phone to Person and a finder method for Phone which is "findByPerson". If you put a getPhone() method on Person, it can hide the call to the finder on Phone. Jeff -Original Message- From: Alex Paransky [mailto:[EMAIL PROTECTED]] Sent: Monday, March 05, 2001 10:37 PM To: Orion-Interest Subject: RE: Problem retrieving dependents after Orion restart Has any one been able to get the Entity(1) to Dependent(N) relationship working? I am thinking of removing Dependent objects and just using Entity Beans. However, in the way Orion handles relationships, I will have an extra table I do not really need. If I have a PersonEntity relating to PhoneEntity in a 1-N scenario, then Orion attempts to create PersonEntity-PhoneEntity join table. Is there a way to modify orion-ejb-jar.xml to avoid this type of scenario. All my Entities are identified with integer key, so my phone table simply contains a field called 'ownerId'. Different types of entities can have phones, but since all the entities are identified with the same type of primary key, I can store that in the 'ownerId' field in the phone table. Thanks. -AP_ -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Alex Paransky Sent: Monday, March 05, 2001 6:13 PM To: Orion-Interest Subject: RE: Problem retrieving dependents after Orion restart Here is an excerpt from orion-ejb-jar.xml, can someone tell me if I have something configured incorrectly. Again, the data is properly written to the database, it is just NOT READ when orion is restarted and getPhoneDependents() api is executed. entity-deployment name="ejb.person.PersonEntity" location="ejb.person.PersonEntity" wrapper="PersonEntityHome_EntityHomeWrapper33" table="ejb_person_PersonEntity" data-source="jdbc/siteDS" primkey-mapping cmp-field-mapping fields cmp-field-mapping name="id" persistence-name="id" / /fields /cmp-field-mapping /primkey-mapping cmp-field-mapping name="salutation" persistence-name="salutation" / cmp-field-mapping name="name" persistence-name="name" / cmp-field-mapping name="email" persistence-name="email" / cmp-field-mapping name="phoneDependents" collection-mapping table="ejb_phones" primkey-mapping cmp-field-mapping fields cmp-field-mapping name="id" persistence-name="id" / /fields /cmp-field-mapping /primkey-mapping value-mapping type="ejb.person.PersonPhone" cmp-field-mapping name="value" properties cmp-field-mapping name="id" persistence-name="id" / cmp-field-mapping name="number" persistence-name="number" / cmp-field-mapping name="person" entity-ref home="ejb.person.PersonEntity" cmp-field-mapping name="person" fields cmp-field-mapping name="id" persistence-name="ownerId" / /fields /cmp-field-mapping /entity-ref /cmp-field-mapping /properties /cmp-field-mapping /value-mapping /collection-mapping /cmp-field-mapping ejb-ref-mapping name="ejb/id" / /entity-deployment Again, the ejb.person.PersonEntity has a 1 to N relation with dependend ejb.pers.PersonPhone. Thanks. -AP_ -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Alex Paransky Sent: Monday, March 05, 2001 1:18 PM To: Orion-Interest Subject: Problem retrieving dependents after Orion restart I have an entity bean with 1-N relationships to dependents. I have two clients, the first client executes a method on a session that populates and works with the data. The second client tries to access the data. When I run the first client followed by the second client, second client works correctly. When I run the first client, then RESTART ORION, then run second client, second client fails to find dependents (but they are there, in the table). Here is the output: Orion/1.4.7 initialized Create person entity Add phone1 Add phone2 Add phone3 Phone: 8551 (818) 541-0029 1 Phone: 8552 None 2 Phone: 8553 (310) 880-5962 3 Deleting last phone Phones: [Lejb.util.Value;@44006e [apara@junior orion]$ ./go Orion/1.4.7 initialized Phones: null First we create a new person entity, set the phones (dependents), then list the phones, finally delete the last phone. Then restarting orion, we try to lookup the phone dependents. Phones returns as null. The table contains correct values. Phones ARE there. What could be wrong? -AP_
RE: Database schema type mappings
Yes, it fits into a long, but by default constants like 1000 * 60 * 60 * 24 * 30 are ints, so the arithmetic is done using int math. Inconveniently, the value of that expression is (slightly) greater than Integer.MAX_VALUE so overflow occurs. Thus the negative value which gets assigned to millisInMonth. The fix is to force long math: long millisInMonth = (long)1000 * 60 * 60 * 24 * 30; This should probably go in some sort of Java-puzzle magazine article. :-) Jeff -Original Message- From: Randahl Fink Isaksen [mailto:[EMAIL PROTECTED]] Sent: Thursday, March 01, 2001 1:09 AM To: Orion-Interest Subject: RE: Database schema type mappings Jeff, about the bug you mention... that sounds very strange to me and it sure should not have anything to do with byte size, I think. The value millisInMonth easily fits into a long... So if you have a long representing the current time milliseconds and subtract one month of milliseconds, yes, that should definately produce a time last month. I would like to know if I am wrong in this assumption or what the bug REALLY was about (?) R. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Jeff Schnitzer Sent: 1. marts 2001 02:38 To: Orion-Interest Subject: RE: Database schema type mappings You're thinking C++. In Java: A long is 8 bytes, always. An int is 4 bytes, always. The byte-orders are fixed independent of the hardware, too. Speaking of byte size, here's something I found amusing (and annoying): long millisInMonth = 1000 * 60 * 60 * 24 * 30; Date thirtyDaysAgo = new Date(); thirtyDaysAgo.setTime(thirtyDaysAgo.getTime() - millisInMonth); This actually produces a date in the FUTURE! It took me a while to hunt down this bug because it had really wierd effects on my application. Jeff -Original Message- From: Michael A Third [mailto:[EMAIL PROTECTED]] Sent: Wednesday, February 28, 2001 11:02 AM To: Orion-Interest Subject: RE: Database schema type mappings Randahl, We use the primitive long for all of our primary keys for a couple of reasons: * primary keys can't be null so there isn't a need for Long (or Integer) * long's are always 4 bytes no matter what the CPU (32bit vs 64bit), which is currently not a problem but could be when Itanium platforms come out. int's depend on the CPU's native integer type which happens to be 32bits on ix86 architectures. Michael Third Chief Software Architect parts.com -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Randahl Fink Isaksen Sent: Wednesday, February 28, 2001 10:02 AM To: Orion-Interest Subject: Database schema type mappings If you look at the database schema in "orion/config/database-schemas/hypersonic.xml" it looks as if it is mapping between the primitive java type "int" and the corresponding database type "int": type-mapping type="int" name="int" /. In my EJBs my primary keys and other attributes are of type Integer. Since there is no mapping for class Integer one could think that Integers would be mapped to VARBINARY. Luckily my integers are mapped to the database type "int", but this makes me ask two questions: 1. Why is Integers automatically converted to int by Orion - and is this a standard EJB convention? 2. Would it be legal to have a primary key of the primitive type "int" instead of Integer? Yours Randahl
RE: Database schema type mappings
It's at the bottom of page 159 of Richard Monson-Haefel's _Enterprise Java Beans, 2nd Ed_: "Although primary keys can be primitive wrappers (Integer, Double, Long, etc.), primary keys cannot be primitive types (int, double, long, etc.)" I wasn't able to locate an explicit statement in the spec in my quick scan, but the spec always refers to the primary key as the "primary key class" and the deployment descriptor element is "prim-key-class". This is further reinforced by the comments in the DTD. It makes sense, because EntityContext.getPrimaryKey() returns an Object. Thus all PKs *must* be Objects. About question #1: I doubt there is any explicit requirement in the spec that Integers be converted to ints in the database. In fact, the spec doesn't require a relational database; that's simply an implementation detail. Still, I doubt you will find *any* appservers which serialize Integer keys as blobs - although it would work, the performance penalty would be severe. Jeff -Original Message- From: Randahl Fink Isaksen [mailto:[EMAIL PROTECTED]] Sent: Thursday, March 01, 2001 1:22 AM To: Orion-Interest Subject: RE: Database schema type mappings Thanks for the reply Jeff. Know I have two replies: One saying primary keys can be primitive types and one that says they can't. I am really looking forward to hearing your arguments, gentlemen ;-) BTW, Jeff: Your answer to question number 1 - do you have that from the specification, or... Randahl -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Jeff Schnitzer Sent: 1. marts 2001 02:52 To: Orion-Interest Subject: RE: Database schema type mappings From: Randahl Fink Isaksen [mailto:[EMAIL PROTECTED]] 1. Why is Integers automatically converted to int by Orion - and is this a standard EJB convention? Yes. All the class representations of the primitive types should work that way. 2. Would it be legal to have a primary key of the primitive type "int" instead of Integer? No. Primary keys must be Objects. This makes sense because EntityContext.getPrimaryKey() returns an Object. Jeff
RE: CMP 2.0
I've heard comments on this list in the past from Karl Magnus that bad, misleading, or missing error messages should be logged in Bugzilla as bugs. http://www.orionserver.com/bugzilla :-) Jeff -Original Message- From: Randahl Fink Isaksen [mailto:[EMAIL PROTECTED]] Sent: Thursday, March 01, 2001 1:19 AM To: Orion-Interest Subject: RE: CMP 2.0 As I just posted, Jeff. The error was due to the fact that I had declared my primary keys as Integer but I returned the primitive type int from my ejbCreate methods. As soon as I changed this, everything worked fine. I am (to put it mildly) very surprised that Orion did _not_ give me a compile time error when I deployed - it just crashed instead or ran without working correctly. Yes I know who introduced the bug, but since I think Orion is a magnificent piece of software I would never had expected it to NOT report this compile time error. Randahl -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Jeff Schnitzer Sent: 1. marts 2001 02:42 To: Orion-Interest Subject: RE: CMP 2.0 ? I have all my transactional behavior defined as NotSupported and I use EJB 2.0 container managed relationships without issue. I don't currently need transactions for what I'm doing. Randahl, have you examined the contents of the database tables and the orion-ejb-jar.xml closely? Jeff -Original Message- From: Tim Drury [mailto:[EMAIL PROTECTED]] Sent: Wednesday, February 28, 2001 8:34 AM To: Orion-Interest Subject: RE: CMP 2.0 I've been out for a few days, so it this has been answered, sorry for the repost. This sounds like you didn't set the transactional behavior in ejb-jar.xml as "required". There is no default behavior in the spec so it is up to the container to decide what the default behavior is. I know in Weblogic, transactions default to "supports" (I think). In any event, the entities are not stored in the database unless you mark them as "required". Orion may be doing the same thing. -tim -Original Message- From: Randahl Fink Isaksen [ mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] ] Sent: Monday, February 26, 2001 5:29 AM To: Orion-Interest Subject: CMP 2.0 Would somebody please confirm that they have been able to use CMP 2.0 relationships on Orion, that they have seen them get stored in the database AND brought back into main memory correctly after a restart of the server. When I create a relationship it works fine until I restart - I simply can't make Orion restore my relationships from the keys it stores in the database. If I try the getX() / method of a cmr property it works - but after a restart it returns null. R.
RE: Struts (was: I switch from X to Orion because: )
Why on earth would you want to store a MessageResources/ResourceBundle in an application or session context? The static method ResourceBundle.getBundle(...) returns a fast hash lookup for the bundle from a table the framework maintains. It has the added bonus that if you pass in the appserver's classloader, properties files are automagically reloaded just like everything else - no need for special administrative Reload actions. All that should be needed is: String blah = ResourceBundle.getBundle(name, locale, classLoader).getString(key); Why does Struts put MessageResources in a servlet context? Jeff -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] Sent: Thursday, March 01, 2001 9:51 AM To: Orion-Interest Cc: [EMAIL PROTECTED]; [EMAIL PROTECTED] Subject: Re: Struts (was: I switch from X to Orion because: ) The reason for reimplementing ResourceBundle as MessageResources is that ResourceBundle is not Serializable. Some containers, notable WebLogic 6, have issues with non-serializable objects being stored in things like the application and session context. Its also very important that you only throw Serializable things in there espacially if you plan on using the distributable / tag in your web.xml. mark Mark R Mascolino The Procter Gamble Co. [EMAIL PROTECTED] Internet Mail Message Received from host: "Jeff Schnitzer" [EMAIL PROTECTED] To: Orion-Interest Sent by: [EMAIL PROTECTED] [EMAIL PROTECTED]cc: (bcc: Mark Mascolino-MR/PGI) Subject: Struts (was: I switch from X to 02/28/01 08:25 PMOrion because: ) Please respond to Orion-Interest This subject is especially timely for me because I just finished evaluating both WebWork and Struts. I decided to go with WebWork. It wasn't so much that I was drawn to WebWork's technological coolness - there are some neat ideas there, but I think most could be adapted into Struts with a little effort. The problem was that when I looked deeply into Struts, I didn't like what I saw. I spent a *lot* of time wavering; on one hand, Struts has a solid user community and good javadocs, on the other hand, WebWork is simpler and easier to teach future members of the team. I kept switching my favor back and forth when I discovered something new I did or didn't like. What finally pushed me over the edge was my experience hunting down the problem preventing Struts from working with Orion out of the box. Here's the story: If you've ever tried loading the Struts 1.0 example app, you are immediately confounded by missing resource errors. There is a lot of complaint in the Orion and Struts archives about this, but the closest anyone has come to nailing it down is this message: http://www.mail-archive.com/struts-user@jakarta.apache.org/msg0 0582.html in which the principal author of Struts, Craig, implies that Orion's classloader has a problem preventing it from working with the standard JDK ResourceBundle. I knew there was something wrong with this because WebWork uses ResourceBundle without issue. So I looked through Struts' source to see how it might be using ResourceBundle differently, and what I discovered is that Struts doesn't use ResourceBundle at all! In fact, Struts has a whole homebrewed framework for handling properties which mirrors the ResourceBundle API but doesn't use any of its classes or interfaces. There are javadoc comments to the effect that the Struts code should be faster than ResourceBundles, but looking at the JDK 1.3 source code, both frameworks seem to be doing pretty much the same thing. For those curious, the actual problem with Orion is that Struts uses ClassLoader.getResourceAsStream() to build the Properties object, and (I checked the decompiled code) the Orion classloader does not implement getResourceAsStream(). Orion's fault, and logged as bug #340. But why re-invent the wheel?!? The JDK provides resource management for us! Even if the Struts code was slightly faster (which I doubt), any performance gai
RE: Database schema type mappings
From: Chad Stansbury [mailto:[EMAIL PROTECTED]] Actually, a more proper way is to indicate to the compiler that you want long arithmetic by writing: long millisInMonth = 1000L * 60L * 60L * 24L * 30L I'm sure it all gets optimized out to the same thing in the end :-) But yes, you're right. I can imagine what engineers 10 years from now are going to be saying when they write Java code - damn thing only uses 32 bit math by default! How silly on our (32 * whatever) bit chips! :-) It certainly beats erratic machine-specific behavior though. Oh, and by the way, this is not really correct since you're assuming 30 days in a month. You should use the Calendar to figure out how many millis a given month actually has since this varies by month and year. The problem is not that particular. It's just a "what happened in the last 30 days" search bound. Jeff
Struts (was: I switch from X to Orion because: )
This subject is especially timely for me because I just finished evaluating both WebWork and Struts. I decided to go with WebWork. It wasn't so much that I was drawn to WebWork's technological coolness - there are some neat ideas there, but I think most could be adapted into Struts with a little effort. The problem was that when I looked deeply into Struts, I didn't like what I saw. I spent a *lot* of time wavering; on one hand, Struts has a solid user community and good javadocs, on the other hand, WebWork is simpler and easier to teach future members of the team. I kept switching my favor back and forth when I discovered something new I did or didn't like. What finally pushed me over the edge was my experience hunting down the problem preventing Struts from working with Orion out of the box. Here's the story: If you've ever tried loading the Struts 1.0 example app, you are immediately confounded by missing resource errors. There is a lot of complaint in the Orion and Struts archives about this, but the closest anyone has come to nailing it down is this message: http://www.mail-archive.com/struts-user@jakarta.apache.org/msg00582.html in which the principal author of Struts, Craig, implies that Orion's classloader has a problem preventing it from working with the standard JDK ResourceBundle. I knew there was something wrong with this because WebWork uses ResourceBundle without issue. So I looked through Struts' source to see how it might be using ResourceBundle differently, and what I discovered is that Struts doesn't use ResourceBundle at all! In fact, Struts has a whole homebrewed framework for handling properties which mirrors the ResourceBundle API but doesn't use any of its classes or interfaces. There are javadoc comments to the effect that the Struts code should be faster than ResourceBundles, but looking at the JDK 1.3 source code, both frameworks seem to be doing pretty much the same thing. For those curious, the actual problem with Orion is that Struts uses ClassLoader.getResourceAsStream() to build the Properties object, and (I checked the decompiled code) the Orion classloader does not implement getResourceAsStream(). Orion's fault, and logged as bug #340. But why re-invent the wheel?!? The JDK provides resource management for us! Even if the Struts code was slightly faster (which I doubt), any performance gain is going to be negligable compared to the amount of time spent processing taglibs, etc. I can't believe that whoever wrote the Struts MessageResources classes ever bothered to run the code through a profiler to find out where the real bottlenecks are. All this extra code and duplicated infrastructure is nothing but an opportunity for more bugs, IMHO. At this point I decided to go with WebWork. It is certainly not without issues as well, but I'm very happy with the results. And I am finding that in a framework this simple, fundamental changes are easy to make. I could elaborate on the differences between WebWork and Struts if anyone is really interested. If you're still writing JSP-centric applications, you *really* should look into an MVC framework. Jeff -Original Message- From: Arved Sandstrom [mailto:[EMAIL PROTECTED]] Sent: Wednesday, February 28, 2001 1:42 PM To: Orion-Interest Subject: RE: I switch from X to Orion because: Just a few comments...not angry comments. :-) As a committer on an Apache project, let me just say that decisions to support JDK 1.1, on a per-project basis, are not about supporting "dead things". We have, in fact, people who _must_ use JDK 1.1 (probably more than you might think). As another example, we are a J2EE shop; but just recently we had a (big) requirement to support ISAM data. That's ancient, too, but I'll bet there's more ISAM data out there than there is relational data. Would you personally turn up your nose at supporting ISAM? Well, maybe you would. I dunno. I haven't used Struts myself, but since you mention it, I'd guess you'd have to ask Rickard himself why he decided to write his own framework. With all due respect to him, the primary reason, 9 times out of 10, that people write their own code is because as an industry we are damned terrible at re-use. There are a whole bunch of bad reasons why this is so - laziness, arrogance, reluctance to share the limelight, etc etc. Only rarely do you find that somebody wrote code because they conducted a thorough search and couldn't find anything that could even be modified. I'm personally pretty hot about this topic because there is a huge amount of wasted time due to this. Frameworks are a particularly bad offender - everybody and his brother wants to write their own framework. As far as bloat, well, that's in the eye of the beholder. If a product provides 100 features, but any given user only needs 25 of them, but nearly all of the features are useful to someone, it's "bloat" to almost everyone, but also useful to almost everyone. It's only bad
RE: Database schema type mappings
You're thinking C++. In Java: A long is 8 bytes, always. An int is 4 bytes, always. The byte-orders are fixed independent of the hardware, too. Speaking of byte size, here's something I found amusing (and annoying): long millisInMonth = 1000 * 60 * 60 * 24 * 30; Date thirtyDaysAgo = new Date(); thirtyDaysAgo.setTime(thirtyDaysAgo.getTime() - millisInMonth); This actually produces a date in the FUTURE! It took me a while to hunt down this bug because it had really wierd effects on my application. Jeff -Original Message- From: Michael A Third [mailto:[EMAIL PROTECTED]] Sent: Wednesday, February 28, 2001 11:02 AM To: Orion-Interest Subject: RE: Database schema type mappings Randahl, We use the primitive long for all of our primary keys for a couple of reasons: * primary keys can't be null so there isn't a need for Long (or Integer) * long's are always 4 bytes no matter what the CPU (32bit vs 64bit), which is currently not a problem but could be when Itanium platforms come out. int's depend on the CPU's native integer type which happens to be 32bits on ix86 architectures. Michael Third Chief Software Architect parts.com -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Randahl Fink Isaksen Sent: Wednesday, February 28, 2001 10:02 AM To: Orion-Interest Subject: Database schema type mappings If you look at the database schema in "orion/config/database-schemas/hypersonic.xml" it looks as if it is mapping between the primitive java type "int" and the corresponding database type "int": type-mapping type="int" name="int" /. In my EJBs my primary keys and other attributes are of type Integer. Since there is no mapping for class Integer one could think that Integers would be mapped to VARBINARY. Luckily my integers are mapped to the database type "int", but this makes me ask two questions: 1. Why is Integers automatically converted to int by Orion - and is this a standard EJB convention? 2. Would it be legal to have a primary key of the primitive type "int" instead of Integer? Yours Randahl
RE: CMP 2.0
? I have all my transactional behavior defined as NotSupported and I use EJB 2.0 container managed relationships without issue. I don't currently need transactions for what I'm doing. Randahl, have you examined the contents of the database tables and the orion-ejb-jar.xml closely? Jeff -Original Message- From: Tim Drury [mailto:[EMAIL PROTECTED]] Sent: Wednesday, February 28, 2001 8:34 AM To: Orion-Interest Subject: RE: CMP 2.0 I've been out for a few days, so it this has been answered, sorry for the repost. This sounds like you didn't set the transactional behavior in ejb-jar.xml as "required". There is no default behavior in the spec so it is up to the container to decide what the default behavior is. I know in Weblogic, transactions default to "supports" (I think). In any event, the entities are not stored in the database unless you mark them as "required". Orion may be doing the same thing. -tim -Original Message- From: Randahl Fink Isaksen [ mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] ] Sent: Monday, February 26, 2001 5:29 AM To: Orion-Interest Subject: CMP 2.0 Would somebody please confirm that they have been able to use CMP 2.0 relationships on Orion, that they have seen them get stored in the database AND brought back into main memory correctly after a restart of the server. When I create a relationship it works fine until I restart - I simply can't make Orion restore my relationships from the keys it stores in the database. If I try the getX() / method of a cmr property it works - but after a restart it returns null. R.
RE: Database schema type mappings
From: Randahl Fink Isaksen [mailto:[EMAIL PROTECTED]] 1. Why is Integers automatically converted to int by Orion - and is this a standard EJB convention? Yes. All the class representations of the primitive types should work that way. 2. Would it be legal to have a primary key of the primitive type "int" instead of Integer? No. Primary keys must be Objects. This makes sense because EntityContext.getPrimaryKey() returns an Object. Jeff
RE: jsp form-based authentication
You should look in the Orion javadocs for DataSourceUserManager. Here's an example of what to put in the orion-application.xml: user-manager class="com.evermind.sql.DataSourceUserManager" property name="table" value="Member" / property name="passwordField" value="password" / property name="defaultGroups" value="authenticated,god" / property name="usernameField" value="name" / property name="dataSource" value="jdbc/SimilarityCoreDS" / property name="staleness" value="0" / /user-manager Note that you will also need to define your groups in principals.xml (either the deployment version or the global version). Good luck, Jeff -Original Message- From: Roland Dong [mailto:[EMAIL PROTECTED]] Sent: Tuesday, February 27, 2001 12:07 AM To: Orion-Interest Subject: RE: jsp form-based authentication Has anyone responded to this message? I am also interested in that... Roland -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Vaskin Kissoyan Sent: Friday, February 23, 2001 10:46 AM To: Orion-Interest Subject: jsp form-based authentication I need a good example of looking up username/password in a database, how do you override the security so that it checks a database instead of checking the internal web.xml file and principals.xml?
RE: How do I map a .doc extension to a .jsp execution
While that would work, you would have to create a separate jsp for each document... really you should probably create your own servlet, map it to *.doc in the same way, and use request.getPathInfo() and request.getPathTranslated() (or just forward to the request to a URL in a protected directory). Or better yet, look into filters. I haven't looked at the Servlet 2.3 specification for filters yet, but I suspect this is exactly the sort of problem filters are designed to solve. Jeff -Original Message- From: Christian Billen [mailto:[EMAIL PROTECTED]] Sent: Tuesday, February 27, 2001 5:03 AM To: Orion-Interest Subject: RE: How do I map a .doc extension to a .jsp execution I haven't tried this but try to modify the config/global-web-application.xml and add a mapping for the jsp servlet: servlet-mapping servlet-namejsp/servlet-name url-pattern/*.doc/url-pattern /servlet-mapping -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Christian Kvalheim Sent: Monday, February 26, 2001 3:31 PM To: Orion-Interest Subject: How do I map a .doc extension to a .jsp execution Hello I have the following problem. We have a certain number of Word documents in out database that we want to output to the browser. Everything is fine, we get the document as a blob from the database and into the jsp variables. However for internet explorer to recognise the file as a word document (and start the viewer) we need to append a .doc extension. Since the urlcode is ...something/mydocument.jsp it does not get recognised. How can I make orion treat .doc files as .jsp files for execution on the server ?? This would allow me to wrap the execution logic into the .doc file and let the browser see the document (changing acording to which document is fetched from the server) Yours Christian Amor Kvalheim Quality Manager + __ Do You Yahoo!? Get email at your own domain with Yahoo! Mail. http://personal.mail.yahoo.com/
RE: ONCE AGAIN !!!! PK.class CMP beans in ORION
It's difficult to tell without seeing your deployment descriptor, but it sounds like you're trying to use the PK class as a cmp-field. You should not be doing this. You should instead have cmp-fields for each of the fields in the PK. The only mention of the PK class in the ejb-jar.xml should be the prim-key-class element. I've found that it's pretty much necessary to read the DTDs for the deployment descriptors. Jeff -Original Message- From: faisal [mailto:[EMAIL PROTECTED]] Sent: Tuesday, February 27, 2001 11:09 AM To: Orion-Interest Subject: ONCE AGAIN PK.class CMP beans in ORION Hi All I already asked this question long time ago.Including the pk class in Orion ejb.jar seems to be beyond my intelligence.I ve been trying to apply Roman e-commerce application from his book "Mastering Java Enterprise beans" .May be there is another way of making the primary key in CMP bean available to the rest of bean classes ...Any suggestion please.. Again the problem is : when I include the pk.class among the cmp bean CMP FIELDS -the deployment descriptor can 't recognise the PK class of the CMP bean
RE: Orion FORM based authentication Configuraton problem
If I'm reading the steps correctly, this behavior is actually fully spec-compliant. This is the reason I don't use FORM-based login. j_security_check is only required to be valid immediately after an attempt to visit a secured page. There is no provision to be able to re-enter credentials from the failure page, and the Orion implementation doesn't allow it. The user must hit the back button :-( Also, Orion performs a forward() rather than a redirect() when a successful login does occur. Thus the ugly url in the user's browser. I logged bug #126 against this issue but it was denied :-) Jeff -Original Message- From: gnoht orion [mailto:[EMAIL PROTECTED]] Sent: Monday, February 26, 2001 3:41 AM To: Orion-Interest Subject: Re: Orion FORM based authentication Configuraton problem ran into same problem, i think it's a bug in orion. just remove the j_security_check from your action field and login will still work, but correct url will show up. can't really understand why it works this way, hope it helps. -t --- cybermaster [EMAIL PROTECTED] wrote: When I use % authentication (1.4.5, W2K Server, jdk1.3), I've got a couple of problems: (1) Basic setup is: /Home.jsp, link to /secure/loginDummy.jsp (2) User tries to get to /secure/loginDummy.jsp - Orion redirects to /login.jsp (3) login correct works fine with /login.jsp - (browser shows /secure/dummyLogin as URL) (4a) browser displays /secure/loginDummy.jsp - OK, but: - (browser shows /secure/j_security_check as URL) BUT (4b) if first login incorrect, Orion redirects to /loginError.jsp - (browser shows /secure/j_security_check as URL) (5a) error again, page stays at /loginError.jsp jsp - (browser shows /secure/j_security_check as URL) (5b) user enteres correct passwd - "ERROR 404 Not Found - Resource /formAuth/secure/j_security_check not found on this server" somehow Orion forgets the correct URL (it shouldn't show j_security_check in the first place, I guess). The user is actually logged in, and can go to the /secure/* pages at this time. Peter Saurugger Everest eCommerce [EMAIL PROTECTED] __ Do You Yahoo!? Get email at your own domain with Yahoo! Mail. http://personal.mail.yahoo.com/
RE: Orion FORM based authentication Configuraton problem
But then I also want to be able to enter login credentials on the default page, so now that page must be login-required error the homepage... While I have no doubt that it could be made to work, this is not an elegant or appropriate solution to the problem. Sun needs to fix the spec. Jeff -Original Message- From: Nick Newman [mailto:[EMAIL PROTECTED]] Sent: Monday, February 26, 2001 12:26 PM To: Orion-Interest Subject: RE: Orion FORM based authentication Configuraton problem I suppose that you could use the SAME page for login and error. You could tell which context it's being called in by playing with a session variable, I think. That should give you the flexibility you want, and all within spec. Nick Newman At 11:31 AM 2/26/01 -0700, you wrote: I agree with Jeff the Servlet 2.2 Spec only specifies that an error page is returned - so Orion's behaviour is up to spec. To allow continuation of the login process from loginError page would be an add-on ... cerrtainly a useful one, because it's more user friendly. But of course, it is Orion's developers who call the shots. --peter -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Jeff Schnitzer Sent: Monday, February 26, 2001 8:06 AM To: Orion-Interest Subject: RE: Orion FORM based authentication Configuraton problem If I'm reading the steps correctly, this behavior is actually fully spec-compliant. This is the reason I don't use FORM-based login. j_security_check is only required to be valid immediately after an attempt to visit a secured page. There is no provision to be able to re-enter credentials from the failure page, and the Orion implementation doesn't allow it. The user must hit the back button :-( Also, Orion performs a forward() rather than a redirect() when a successful login does occur. Thus the ugly url in the user's browser. I logged bug #126 against this issue but it was denied :-) Jeff
RE: HELP!!! - Using UserManagers - Logging in users without asking for credentials
You want to use the RoleManager:
Context ctx = new InitialContext();
RoleManager roleMan =
(RoleManager)ctx.lookup("java:comp/RoleManager");
try
{
roleMan.login(memberName, password);
}
catch (SecurityException ex)
{
return false;
}
return true;
-Original Message-
From: Chris Evans [mailto:[EMAIL PROTECTED]]
Sent: Sunday, February 25, 2001 3:49 PM
To: Orion-Interest
Subject: HELP!!! - Using UserManagers - Logging in users without asking
for credentials
Hey,
I've tried everything that I can think of without any proper
documentation/examples to go by. What i'm trying to do is have a
servlet accept requests from another website. Balled up in that request
would be user credentials(ie: username, password, etc...). From the
request I want to log in that user to my application without them
knowing they have switched sites. I thought EJBManager was the way to
go but without any real documentation i'm at a loss as to how to go
about doing this. Right now we use DataSourceUserManager and form-based
login to accept the users info and that works fine.
Does anybody have any idea/examples on how to do this???
I've tried changing the user-manager in orion-application.xml to
"com.evermind.ejb.EJBManager" but I can't figure out how to use/see it
in a servlet to be able to do lookups on the DB.
Thanks,
Chris Evans
Canlink Interactive Technologies
RE: CMP 2.0
From: Randahl Fink Isaksen [mailto:[EMAIL PROTECTED]] Question A: Are the ones of you who are using CMP 2.0 using version 1.4.4, 1.4.5 or 1.4.7 of Orion? I'm using 1.4.5 because 1.4.7 introduced a showstopper bug for me (fixed in 1.4.8, whenver that happens). Bug #296. Question B: When _you_ use the uni-directional relationship-features does that make Orion create a seperate table for the relation or is the relationship stored as a serialized collection attribute (in the 1:N case, of course)? It depends on how you set the visibility. If you put the unidirectional relationship on the 1: side, a separate relationship table is created. If you put the unidirectional relationship on the :N side, a column is created in the N table. Question C: Would you mind posting an example of a unidirectional ejb-relation declaration that you have made work. Preferably both a 1:N and 1:1 relationship. I couple weeks ago I posted some examples of "modern" ant buildfiles which included a small test project you will probably find helpful: http://www.infohazard.org/ServerTest.zip This is the project I've been using to probe the rough spots of Orion. It currently is set up for a bidirectional 1:N relationship between two entities (Foo and Bar). Changing it to unidirectional should be trivial. A think the ideas behind CMP 2.0 are absolute magnificent, but gee, it has been a hard struggle for me to make it work on Orion :) . Often when I test my new CMP 2.0 application Orion simply just crashes - no error messages, nothing, it just closes. - I think I am starting to understand what was ment with "CMP 2.0 preview" as it says on the web site (LOL). It works. I had a rough time when I started too, but mostly because the only documentation for EJB2.0 was (and probably still is) the spec. My most perverse case is a bean whose PK is a compound of two CMR fields, and it works just fine. To be honest, and I think this is a common complaint with entity beans - if I had simply used JDBC in session beans, I would have been done a long, long time ago. And the app would probably perform an order of magnitude faster. I cringe when I see the blizzard of select statements issued by a finder method. Jeff
RE: CLASSPATH setup
The J2EE sdk is not necessary, and probably should be removed. It is the reference implementation of a J2EE server. You will be using Orion instead. Why aren't you using the 1.3 jdk? Put the postgres jdbc driver in the orion/lib directory. That should work :-) Jeff -Original Message- From: Peter Peltonen [mailto:[EMAIL PROTECTED]] Sent: Friday, February 23, 2001 4:27 AM To: Orion-Interest Subject: CLASSPATH setup I'm a beginner with Orion and Java setup with Linux. I would like to know if I have setup my system correctly. I have installed the following on my RedHat 6.2 system: postgresql-jdbc-7.0.2-2 jdk-1.2.2 j2sdkee-1.2.1 orion-1.4.5 For everything work right, I should have the CLASSPATH variable setup right, yes? I am a bit confused where to setup it, actually. Java 2 SDK Enterprise Edition - Reading the j2sdkee-1.2.1 installation instructions I added the postgres jdbc-driver to the J2EE_CLASSPATH variable in /usr/local/java/j2sdkee1.2.1/bin/userconfig.sh: --snip-- J2EE_CLASSPATH=/usr/src/j2sdkee1.2.1/lib/j2ee.jar:/usr/src/j2sd kee1.2.1/lib/system/jdbc7.0-1.2.jar export J2EE_CLASSPATH --snip-- I tried running the userconfig.sh script but nothing seems to happen. My J2EE_CLASSPATH variable did not appear to be existing when I ran echo. So, when is this file read, then? And what does this warning mean (quoted from the installation instructions): "Note: You should remove the driver .jar files from the CLASSPATH environment variable." So, what is the relation with J2EE_CLASSPATH and CLASSPATH? In my setup (see below) J2EE_CLASSPATH is included in CLASSPATH, is this wrong? /etc/profile As running usreconfig.sh did nothing, I configured the variables I needed in /etc/profile. In my /etc/profile reads: --snip-- JAVA_HOME=/usr/local/java/jdk1.2.2 J2EE_CLASSPATH=/usr/src/j2sdkee1.2.1/lib/system/jdbc7.0-1.2.jar CLASSPATH=$JAVA_HOME:$J2EE_CLASSPATH export JAVA_HOME J2EE_CLASSPATH CLASSPATH --snip-- So, my current setup is this: [peter@cayman orion]$ echo $CLASSPATH /usr/local/java/jdk1.2.2:/usr/src/j2sdkee1.2.1/lib/system/jdbc7 .0-1.2.jar [peter@cayman orion]$ echo $JAVA_HOME /usr/local/java/jdk1.2.2 [peter@cayman orion]$ echo $J2EE_CLASSPATH /usr/src/j2sdkee1.2.1/lib/system/jdbc7.0-1.2.jar Is this alright? Am I missing something etc.? Regards, Peter
RE: deployment
A side note:
In the current Orion release, you need to specify the action as
action="%= request.encodeURL("/servlet/MyServlet") %"
For some reason, Orion does not automatically rewrite action urls with
the session id like it does with other urls in pages. I've logged this
in Bugzilla.
It's worthwhile stepping through your application with cookies turned
off to find the problem spots.
Jeff
-Original Message-
From: Richard Doust [mailto:[EMAIL PROTECTED]]
Sent: Friday, February 23, 2001 12:42 PM
To: Orion-Interest
Cc: [EMAIL PROTECTED]
Subject: RE: deployment
There's more to deploying the servlet than just setting the
correct values
in the FORM tag, here's some thoughts:
Use "POST" as the method for processing the FORM. That's
basically what it's
meant for.
The ACTION attribute should be the name of your servlet. If you've
configured your servlet in the .xml files that Orion uses for
that purpose,
there's more to it than if you simply deploy your
Servlet.class file to the
default directory which I think is
/orion/default-web-app/WEB-INF/Classes.
Assuming you put it in the default directory, your servlet should get
invoked when you click on the form's submit button.
Try:
ACTION="/servlet/MyServlet"
/servlet is set up as the default servlet-webdir in the
global-web-application.xml file.
Rich
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of Siling Zhang
Sent: Friday, February 23, 2001 3:11 PM
To: Orion-Interest
Cc: [EMAIL PROTECTED]
Subject: deployment
Does anyone know how to deploy a servlet and html form page on
orion? What
should go into the Action=" " on the html form?
FROM METHOD = "get" ACTION = "??.."
Siling
RE: EJB 2.0 CMP features of Orion
Unidirectional 1-1 and 1-n relationships between EJBs work, but bidirectional relationships do not. There are easy ways to fake it, though. It's not strictly according to the specification - with Orion, you must define the CMR fields as cmp-fields in the entity. pd2 and pdf say you shouldn't. This may have been a change going from pd1 to pd2; most of the CMR (and DO) stuff is based on pd1. I can't fault the Orion team for not keeping up with every zigzag (there have been several). Another thing I noticed is that (at least in 1.4.5) primitive EJB-QL seems to work. When I create a simple findByField method, Orion figures out how to create the appropriate finder-method in orion-ejb-jar.xml. Jeff -Original Message- From: Randahl Fink Isaksen [mailto:[EMAIL PROTECTED]] Sent: Wednesday, February 21, 2001 4:48 AM To: Orion-Interest Subject: EJB 2.0 CMP features of Orion Has anyone tried out OR-mapping of 1-1 relationships and 1-n relationships between two EJBs? I have seen Jim Archer's fine tutorial about EJBs having a 1-1 or 1-n relationship to a *dependent object*, but is the same thing possible between two EJBs? I know the web site states that Orion 1.2.9 does NOT support n-m relationships, but is 1-1 or 1-n supported in the latest release, and is the support for 1-1 and 1-n in accordance with the specification? Randahl
RE: Application clients
There are a number of posts in the archive about how to configure the initial context (either programmatically or by using a jndi.properties file). In addition to that: Define a META-INF/application-client.xml and package it in the client's jar. Define the application client in the j2ee application.xml descriptor with modulejava. Package the client jar in the ear. Deploy the ear file. Run the client from the "applications" directory. Theoretically the client has been "deployed", but I don't think Orion does anything to it other than unpack the ear. Make sure that orion.jar is in the classpath when executing the client. This is more challenging that you would think. The Sun JDK 1.3 "java" ignores the classpath (even if you specify it on the command line) if you use the -jar parameter ($@#%!!). You can either put your app client jar and orion.jar on the classpath and specify the main class, or you can put orion.jar in the Class-Path field of the META-INF/MANIFEST.MF for your application client (but be careful of the path). If you're running on Windows, watch out executing the app client from the orion "applications" directory (or whever you have it deployed to); subsequent deployments of the ear file will fail with an IO error because it can't write to the client jar file. Even if you haven't changed the client jar file and it shouldn't need to be written. There are probably other ways of doing this, but this is what seemed most j2ee-correct to me. I imagine some app servers do something special to the client in the process of deploying it, but Orion is not that sophisticated (yet). Jeff -Original Message- From: Alexander Jerusalem [mailto:[EMAIL PROTECTED]] Sent: Wednesday, February 21, 2001 2:11 PM To: Orion-Interest Subject: Application clients Hi, Can anyone tell what I have to do to use EJBs in Orion from an application client? thanks, Alexander Jerusalem vknn [EMAIL PROTECTED]
RE: Any way to forward to j_security_check?
Yes, this works, and is how I perform user authentication. It's not app
server portable though. :-(
Jeff
-Original Message-
From: Andre Vanha [mailto:[EMAIL PROTECTED]]
Sent: Thursday, February 22, 2001 8:52 AM
To: Orion-Interest
Subject: RE: Any way to "forward" to j_security_check?
It might be possible to achieve this without forwarding. I
haven't tried
it, but using Orion's role manager might do the trick. First you can
retrieve the role manager using RoleManager manager = (RoleManager)new
InitialContext().lookup("java:comp/RoleManager"); The you can
call login on
the RoleManager with the appropriate username and password.
This may do the
trick. You can get more info about the user manager in the
Orion API docs
or at
http://www.orionserver.com/docs/api/com/evermind/security/RoleM
anager.html.
Let me know if this works, I'm curious muslef.
Andre
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]
Sent: Thursday, February 22, 2001 5:27 AM
To: Orion-Interest
Subject: Any way to "forward" to j_security_check?
Does anyone know a way to "forward" to the j_security_check
processing in
Orion ? We use form-based login but have our own processing to
do ahead of
the
standard j_security_check.
On J2EE Reference Implementation (and e.g. Weblogic) we post
the form to our
own servlet instead of j_security_check, then forward from this to
j_security_check. This doesn't seem to work on Orion i.e.
j_security_check
doesn't seem to be something one can get a request dispatcher for.
Of course, the servlet spec doesn't mandate anything about how
the server
should implement the j_security_check mechanism, so
potentially it doesn't
have to have anything that can be referenced and invoked from
application
code. But it would be useful to be able to.
I've also thought about programmatically simulating a post to
j_security_check
instead of trying to forward to it, but doesn't look simple
and not sure
this
would work on Orion either. Might be helped by Servlet 2.3 but
can't move to
that yet.
Am I just missing some trick to this, or is it not possible on
Orion? Or is
it
related to a bug somewhere ? (n.b. even a normal post to
j_security_check
seems to fail, and to get sign-on to work I have to use
Orion's non-standard
feature of leaving the action unspecified).
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RE: EJB Clustering -- ANYONE? [Urgent!]
I would like to see the documentation for the orion deployment descriptors fleshed out. Right now it's sparse and choppy, with some sentences just cut off in the middle. Verbose explanations with examples would be a major improvement. More than anything else, though, I think Orion needs a FAQ-O-MATIC. Jeff -Original Message- From: Magnus Stenman [mailto:[EMAIL PROTECTED]] Sent: Thursday, February 22, 2001 7:43 AM To: Orion-Interest Subject: Re: EJB Clustering -- ANYONE? [Urgent!] Hello, stay tune for a little while longer (if you want to and are able to). There will be a clustering-howto released in roughly a week or so (no promises though, just an estimate), and yes there's plenty of support (and more to come). The doc will be kind of an 'umbrella doc' to the already released http-clustering-howto covering the other tiers of an application. While on that note, what are the other especially wanted areas for improved/more elaborate documentation (howto's and similar)? Please be as specific as possible (ie the opposite of "improved overall documentation" :) and keep in mind that the security-primer is already in the pipe. Thanks in advance! /Magnus Stenman, the Orion team PS. Not getting a reply when asking where to send money do sound strange indeed. We're understaffed relative to the demand so we have a hard time getting back to sales queries etc, but actual ordering should not be any problem whatsoever. Can you please forward what you sent to [EMAIL PROTECTED] and to me as well and I'll try to see what has happened to it. Thanks! - Original Message - From: "Dylan Parker" [EMAIL PROTECTED] To: "Orion-Interest" [EMAIL PROTECTED] Sent: Wednesday, February 21, 2001 7:33 PM Subject: EJB Clustering -- ANYONE? [Urgent!] Hello, all. My company is about to drop Orion. The documentation issues, the dead website, the documentation issues, the absence of company responses, the documentation issues... We've contacted them asking where to send our money. Nothing back. In one last futile attempt to keep Orion afloat in my company a little longer, can anyone provide me with the following information? How does one do EJB Clustering with Orion? Has anyone made this work? Can anyone give some background on the configuration steps? If I don't hear anything... then JRun, here we come. Thanks, Dylan Parker
