[JBoss-user] Declaring finders: problem and work-around
This page tells us how to declare custom finders:
<http://www.jboss.org/online-manual/HTML/ch06s07.html>
The examples use the > and < operators, e.g.:
studentCount > {0} AND teacherName = {1}
I tried something similar in my custom finder, using <= and >=, e.g.:
rideDate <= {0} and rideDate >= {1}
If you try this in your "jaws.xml", you'll see an error message like
this when you deploy your application:
[WARN,XmlFileLoader] msg=The content beginning "<=" is not legal markup.
Perhaps the "=" (d;) character should be a letter., col=-1, line=56
org.xml.sax.SAXParseException: The content beginning "<=" is not legal
markup. Perhaps the "=" (d;) character should be a letter.
The work-around: Escape the < and > with < and >, e.g.:
rideDate <= {0} and rideDate >= {1}
--
Richard Kasperowski (mailto:[EMAIL PROTECTED])
Tel: 617-576-1552, Fax: 617-576-2441
http://www.altisimo.com/
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Re: [JBoss-user] classpath confusion
Guy Rouillier wrote: > Don't put anything in classpath. It's tempting, and it can make > development easier, and you can probably get along fine for awhile. But > sooner or later, you'll get bizarre problems. The most common is that > updates to your EJBs don't take (i.e, they appear to deploy properly, > but when you invoke methods on a new version, the old version is run.) > For 2.4.x, set JBOSS_CLASSPATH as required. For 3.0, which I haven't > used much, there are additional mechanisms for specifying required > runtime jars. What's the best way to deploy a SOAP service through JBoss+TomCat without messing with JBoss's classpath? The SOAP documentation tells me that I must put my service's classes in my servlet container's classpath. -- Richard Kasperowski (mailto:[EMAIL PROTECTED]) Tel: 617-576-1552, Fax: 617-576-2441 http://www.altisimo.com/ ___ JBoss-user mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/jboss-user
Re: [JBoss-user] Design Question...
Tim Yates wrote: > Yeah, the reason we do it this way (and not via HTTP sessions or cookies), > is that it was decided early on that it should be possible to style the site > differently dependant on the device that was accessing it, and we couldn't > guarantee that storing the HTTPSession, or using cookies would work on any > of the four major browsing devices... If you're worried about clients that don't use cookies, you could set your JSP/servlet container to use URL rewriting instead of cookies to identify the session. Then your container could automatically reap expired sessions for you. -- Richard Kasperowski (mailto:[EMAIL PROTECTED]) Tel: 617-576-1552, Fax: 617-576-2441 http://www.altisimo.com/ ___ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user
Re: [JBoss-user] Custom Finders
Devraj Mukherjee wrote: > Can anyone please send me a copy of their jaws.xml where they have made > use of Custom Finders? true true true true UniqueIdsBean unique_ids BicycleBean bicycle name name findAll name RideBean ride findAll dateYear, dateMonth, dateDay -- Richard Kasperowski (mailto:[EMAIL PROTECTED]) Tel: 617-576-1552, Fax: 617-576-2441 http://www.altisimo.com/ ___ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user
Re: [JBoss-user] tomcat site traffic logging
Richard Bottoms wrote: > Any one set up Apache like logging for tomecat? If JBoss-tomcat is going to > see significant us as part of a site content delivery engine we'll need to > be able to capture the same log info Apache does. Both for troubleshooting > purposes and to monitor site traffic. This is one of the reasons to run TomCat through Apache. -- Richard Kasperowski (mailto:[EMAIL PROTECTED]) Tel: 617-576-1552, Fax: 617-576-2441 http://www.altisimo.com/ ___ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user
Re: [JBoss-user] Strange Behavior When DataSource goes down.
David Jencks wrote: > Hi, > I find it hard to understand what you want. > > jboss does try out connections from configured datasources on startup, and > hangs if they can't connect. > > I don't see how this is a severe problem: if your datasource isn't working, > neither will your app. When a datasource becomes unavailable after startup, it might be desirable for the application to tell the user, "sorry, the database is unavailable."? A user might find that more satisfactory than being denied service. -- Richard Kasperowski (mailto:[EMAIL PROTECTED]) Tel: 617-576-1552, Fax: 617-576-2441 http://www.altisimo.com/ ___ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user
Re: [JBoss-user] CMP findAll: how to specify order of returned ob jects?
Nordahl, David C wrote: > You can put an order field in the jaws entry > > > > SteveBean > true > STEVE > > findByAll >last_name ASC > > danch (Dan Christopherson) wrote: > You should be able to do that as a 'defined finder' with an empty query > parameter - see the JAWS section of the online manual. Worked like a charm. Thanks, -- Richard Kasperowski (mailto:[EMAIL PROTECTED]) Tel: 617-576-1552, Fax: 617-576-2441 http://www.altisimo.com/ ___ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user
Re: [JBoss-user] Key generation by random numbers
[EMAIL PROTECTED] wrote:
> On Tue, Jun 26, 2001 at 11:06:42AM -0400, Richard Kasperowski wrote:
>
>>[EMAIL PROTECTED] wrote:
>>
>>
>>>As a follow-up to the debate on how to get auto-increment primary
>>>keys:
>>>
>>>Is it feasible to use a random number generator to generate primary
>>>keys? I don't really need my records to have steadily increasing keys
>>>and my number of records will presumably be much smaller than the size
>>>of my value space (4 billion? depending on data type for prim-key). So
>>>if I do something along the following when making a new record;
>>>
>>>boolean created = false;
>>>do
>>>{
>>> Long key = generateRandomLong();
>>> created = ejb.create(key, contents);
>>>}
>>>while (!created);
>>>
>>
>>One problem with using random numbers is that they're not guaranteed to
>>be unique--two calls to generateRandomLong() can return the same value.
>>
>
> Yes, but that isn't really a problem because you'll just try again and
> it happens sufficiently rarely that the extra time used is
> insignificant. At least, that would be the theory.
But what if it's not sufficiently rare? In the worst case, it will take
O(n) time to find the next usable random number. You might as well just
use a serial number; it will always take O(1) time to find the next
usable serial number.
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Richard Kasperowski (mailto:[EMAIL PROTECTED])
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Re: [JBoss-user] Key generation by random numbers
[EMAIL PROTECTED] wrote:
> As a follow-up to the debate on how to get auto-increment primary
> keys:
>
> Is it feasible to use a random number generator to generate primary
> keys? I don't really need my records to have steadily increasing keys
> and my number of records will presumably be much smaller than the size
> of my value space (4 billion? depending on data type for prim-key). So
> if I do something along the following when making a new record;
>
> boolean created = false;
> do
> {
>Long key = generateRandomLong();
>created = ejb.create(key, contents);
> }
> while (!created);
One problem with using random numbers is that they're not guaranteed to
be unique--two calls to generateRandomLong() can return the same value.
Another problem is that computing the next random number might be
relatively computationally expensive. I'd say serial numbers are better.
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Richard Kasperowski (mailto:[EMAIL PROTECTED])
Tel: 617-576-1552, Fax: 617-576-2441
http://www.altisimo.com/
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Re: [JBoss-user] CMP example of primitive key using int
Hiep Luong wrote: > I've been trying to get the cabinbean example in the RMH > Enterprise JavaBeans book to work. This example has a primary key that is > primitive int. The way they code it is by creating a cabinPK class which > goes into the prim-key-class element in the deployment descriptor with a > corresponding primkey-field element. It compiled but when I ran this, the > table gets created but no primary key constraint is created in oracle but no > exceptions either. Beans are created just fine and I see data in the table > BUT when I try to retrieve the bean by using findbyprimarykey method I get > "No such entry!" exception always. Has anyone successful got this to work? 'int' is a primitive. A primary key must be a Serializable. You cannot use 'int' as a primary key. Try using 'Integer' instead, and see p. 157 of Monson-Haefel's _Enterprise JavaBeans_ for an example. -- Richard Kasperowski (mailto:[EMAIL PROTECTED]) Tel: 617-576-1552, Fax: 617-576-2441 http://www.altisimo.com/ ___ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user
[JBoss-user] CMP findAll: how to specify order of returned objects?
I have CMP bean with a findAll operation that returns a Collection of objects. The order of the objects in the collection seems to be arbitrary: sometimes the sequence is A B C, other times the sequence is B A C, and other times objects are returned in a different sequence. As far as I can tell, JBoss doesn't support EJB QL. How, then, can I specify the order of the objects in the returned Collection? Thanks, -- Richard Kasperowski (mailto:[EMAIL PROTECTED]) Tel: 617-576-1552, Fax: 617-576-2441 http://www.altisimo.com/ ___ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user
Re: [JBoss-user] CMP field type
Boris Garbuzov wrote: > Please tell me if I am any limited with persistent field types for CMP. Can I >specify any > complex class of mine, and container will do it for me? Now I do not care about >efficiency. I > think, container can do it by serializing my class or braking it down recursively. Yes, you can store any object type persistently. The file "standardjaws.xml" defines the mapping from Java types to database column types. -- Richard Kasperowski (mailto:[EMAIL PROTECTED]) Tel: 617-576-1552, Fax: 617-576-2441 http://www.altisimo.com/ ___ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user
Re: [JBoss-user] hello.ear example: Servlet works OK, but not JSP
danch (Dan Christopherson) wrote: > What is the context root set to in the web.xml for the web app? > > You should be able to hit JSPs via 'http://localhost:8080//foo.jsp Context root in web.xml? Do you mean in application.xml? Ah, there's the clue we needed. In application.xml for the hello example, context-root is "/". So *these* URL work: http://localhost:8080/ http://localhost:8080/index.jsp Thanks for the clue, -- Richard Kasperowski (mailto:[EMAIL PROTECTED]) Tel: 617-576-1552, Fax: 617-576-2441 http://www.altisimo.com/ ___ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user
Re: [JBoss-user] hello.ear example: Servlet works OK, but not JSP
Gabriel Mihalache wrote: >>Using a .ear file as in Allen's example, how do I get JBoss+TomCat to >>handle things that aren't servlets? >> > > Do you have the /lib/tools.jar from your JDK in you classpath? > You need it to compile JSPs! Yeah, that would emit a different error message. The Java compiler is there and works fine: I can use the TomCat JSP examples with no problem. -- Richard Kasperowski (mailto:[EMAIL PROTECTED]) Tel: 617-576-1552, Fax: 617-576-2441 http://www.altisimo.com/ ___ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user
[JBoss-user] hello.ear example: Servlet works OK, but not JSP
Allen Fogleson's hello example from June 16 is a nice tutorial and works well enough. I'm having a problem with it, though. This URL works fine: http://localhost:8080/hello It maps directly to the servlet. These URLs don't work: http://localhost:8080/hello/ http://localhost:8080/hello/index.jsp They result in "Not Found 404". Using a .ear file as in Allen's example, how do I get JBoss+TomCat to handle things that aren't servlets? Thanks, -- Richard Kasperowski (mailto:[EMAIL PROTECTED]) Tel: 617-576-1552, Fax: 617-576-2441 http://www.altisimo.com/ ___ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user
Re: [JBoss-user] Proxy server issues - any ideas?
[EMAIL PROTECTED] wrote: > > Well, that obviously wasn't happening at a recent trade show - on > location, our > application was behaving strangely (taking 15-20 times longer to > execute, sharing > session data...). So, SOMETHING was going on - since we aren't doing > URL rewriting > ourselves, the client-side cookies were getting set to the same cookie! > We attribute > that to going through a proxy server on site. Maybe the proxy server > wasn't set up > properly or something, I don't know. My experience is actually with Resin. I've run multiple clients on a single machine, each with its own session, no problem. I've done it both with cookies and with URL rewriting. (We switched to URL rewriting because of FUD about cookies being evil.) Is TomCat's (or whatever you're using) session identification stuff broken? If so, it's not that hard to add your own session IDs. Gee, that would stink, though. -- Richard Kasperowski (mailto:[EMAIL PROTECTED]) Tel: 617-576-1552, Fax: 617-576-2441 http://www.altisimo.com/ ___ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user
Re: [JBoss-user] optimal JVM setting for running jBoss on Solaris
Ernest Chen wrote: > This might not be a jBoss question. > > > > I'm interested to perform some load testing for an upcoming > personalization project using jBoss. What we have is a Sun Enterprise > 4500 machine with 6 CPU and 4 GB memory, our database is running > Oracle on another SUN 4500 with equivalent configuration. > > > > My questions is, how do I configure jboss and JVM to maximize CPU > utilization and Memory utilization? One thing to do is to start the JVM with a large heap. If the heap doesn't have to grow, you won't have heap-growing time delays. With Sun's JVM, the command line option is "-Xms". -- Richard Kasperowski (mailto:[EMAIL PROTECTED]) Tel: 617-576-1552, Fax: 617-576-2441 http://www.altisimo.com/ ___ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user
Re: [JBoss-user] Proxy server issues - any ideas?
[EMAIL PROTECTED] wrote: > > This is a question to those who are bit more experienced in > dealing with proxy servers and issues with them. > > Namely, how to handle session management through a proxy > where everyone ends up sharing the same session (because > the app server sees the same ip for every request)?? > > There's the obvious - passing a session id around and having > to manage things ourselves. But, I'm wondering if there aren't > other solutions to this that don't involve so much work on our end. Sessions are identified by a client-side cookie or URL rewriting. Each client gets its own session, regardless of IP address. -- Richard Kasperowski (mailto:[EMAIL PROTECTED]) Tel: 617-576-1552, Fax: 617-576-2441 http://www.altisimo.com/ ___ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user
[JBoss-user] How to specify relationships between CMP EJBs?
I'm trying to understand how container managed persistence make this
happen. I have two EJBs like so:
-
public interface Foo extends EJBObject {
Long getId() throws RemoteException;
void setId(Long param) throws RemoteException;
String getName() throws RemoteException;
void setName(String param) throws RemoteException;
Bar getBar() throws RemoteException;
void setBar(Bar param) throws RemoteException;
}
public interface Bar extends EJBObject {
Long getId() throws RemoteException;
void setId(Long param) throws RemoteException;
String getName() throws RemoteException;
void setName(String param) throws RemoteException;
}
-
The idea here is that a Foo has a Bar. The Bar must already exist.
I want this to work through CMP. I can't quite figure out how to tell
JBoss that there's a relationship between Foo and Bar. I've been
playing around with the tags "relationships" and "cmr-field", but I
haven't been able to get it right.
Does anyone have an example that I could follow?
Thanks,
--
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Re: [JBoss-user] Want to see the SQL DDL generated by JBoss
Thanks, that's what I wanted. Others should note that the SQL stuff is logged in "server.log", and doesn't show up in stdout. -- Richard Kasperowski (mailto:[EMAIL PROTECTED]) Tel: 617-576-1552, Fax: 617-576-2441 http://www.altisimo.com/ danch (Dan Christopherson) wrote: > You should be able to see this if you put 'true' in > jaws.xml or standardjaws.xml. This will come out at DEBUG level, though, > so make sure that you have one of your logs (log4j.properties in recent > versions, the logger MBean setups in jboss.conf in older) set to output > DEBUG level and above. > > Richard Kasperowski wrote: > >> When JBoss creates a table for my CMP EJB, I want to see the DDL code >> Jboss creates. Is there a switch I can flip somewhere to make the DDL >> code visible? ___ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user
Re: [JBoss-user] The method return values in the home interface must be of valid types for RMI/IIOP.
Emerson wrote: > Your Remote interface can´t extend anything but javax.ejb.EJBObject. My remote interface extends only EJBObject. That's not the problem. Alexander B Kogan wrote: > Remove EJBException from "throws". I just removed it from the home interface methods that JBoss was complaining about. Nordahl, David C wrote: > I ran into this a little bit ago.. There is a good thread on it in the > archive where someone listed all the possible reasons it can occur.. Try > taking out the EJBException from the stuff that gives an error. If you're > using TogetherSoft, it throws those in and the verifier gives that cryptic > error. The jboss.org web site isn't working right now. I'll check the archive later. (This new user didn't know there was a list archive. Thanks for the tip.) I am indeed using Together Control Center, and it did put those exceptions in my code. I removed them. I'll log a complained with TogetherSoft. And then another user with same problem, Phan Anh Tran, wrote: > Found the problem...In my remote interface, I used a number of data types > which were not RMI-IIOP compliant. That was it. My EJB code generator made my business methods (currently just setters and getters) throw EJBException. I removed those bogus exceptions and now all is well. Thanks, everyone, for pulling me along. -- Richard Kasperowski (mailto:[EMAIL PROTECTED]) Tel: 617-576-1552, Fax: 617-576-2441 http://www.altisimo.com/ ___ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user
[JBoss-user] jboss.org web site broken?
It looks like it's not serving JSP. Who can fix it? Thanks, -- Richard Kasperowski (mailto:[EMAIL PROTECTED]) Tel: 617-576-1552, Fax: 617-576-2441 http://www.altisimo.com/ ___ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user
Re: [JBoss-user] Auto-increment CMP primary key?
Nordahl, David C wrote: > You'd need to create a PrimaryKeyBean > like mentioned in earlier posts today ^ Duh! Sorry for the noise! -- Richard Kasperowski (mailto:[EMAIL PROTECTED]) Tel: 617-576-1552, Fax: 617-576-2441 http://www.altisimo.com/ ___ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user
[JBoss-user] Auto-increment CMP primary key?
Another newbie question: Using a totally out-of-the-box JBoss+TomCat, I built a container managed EJB. The EJB's primary key is a Long; the idea is that a simple serial number is sufficient. In my bean's ejbCreate(), is there a recommended way to automatically generate the next Long? Thanks, -- Richard Kasperowski (mailto:[EMAIL PROTECTED]) Tel: 617-576-1552, Fax: 617-576-2441 http://www.altisimo.com/ ___ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user
[JBoss-user] The method return values in the home interface must be of valid types for RMI/IIOP.
I'm a new JBoss user trying to debug my code with respect to this warning message at deploy time. I've tried making the remote interface, Bicycle, extend Serializable, but the warning doesn't go away. What am I doing wrong? - [Verifier] Bean : BicycleBean Method : public abstract Bicycle create() throws CreateException, EJBException, RemoteException, SQLException Section: 9.2.8 Warning: The method return values in the home interface must be of valid types for RMI/IIOP. [Verifier] Bean : BicycleBean Method : public abstract Bicycle findByPrimaryKey(Integer) throws FinderException, RemoteException, EJBException Section: 9.2.8 Warning: The method return values in the home interface must be of valid types for RMI/IIOP. - Thanks, -- Richard Kasperowski (mailto:[EMAIL PROTECTED]) Tel: 617-576-1552, Fax: 617-576-2441 http://www.altisimo.com/ ___ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user
