Re: Looking up session beans between apps
Hi, try to put the remote and home interface of your bean in the app server classpath ( server.xml ), i think it will solve your problem if Bean A and Bean B are on the same server. Does anybody know how to solve this problem if bean A and bean B are on different server ?? Thanks. Rémy. Gday all, I am currently working on porting an application from jboss to orion (don't ask!) and am having problems looking up session beans between apps. What i am trying to do is lookup sessionbeanA (in app A) from sessionbeanB (from app B). (Note that sessionbeanA and sessionbeanB are different bean classes). I am getting a class cast ecxception. This is how i am doing it So in sessionbeanB I create a context using the following properties.. props.put( Context.INITIAL_CONTEXT_FACTORY, com.evermind.server.ApplicationClientInitialContextFactory ); props.put( Context.PROVIDER_URL, ormi://localhost/sso-wa ); props.put( Context.SECURITY_PRINCIPAL, guest ); props.put( Context.SECURITY_CREDENTIALS, ); .. and can successfully locate an instance of sessionbeanA. Then i attempt to narrow it. The class i want to narrow to is SSOManagerHome. The class of the object being narrowed is SSOManagerHome_StatelessSessionHomeWrapper27 It looks OK to me, but the narrow gives and exception. java.lang.ClassCastException at com.sun.corba.se.internal.javax.rmi.PortableRemoteObject.narrow(Unknown Source) at javax.rmi.PortableRemoteObject.narrow(Unknown Source) .. I have found some similar problems.. http://www.elephantwalker.com/searchresult?id=277 http://www.mail-archive.com/orion-interest@orionserver.com/msg17468.html But no solutions :( So where to from here??? Is there a solution? Will the remote access doco http://www.orionserver.com/docs/remote-access/remote-access.xml be of any help as i am going session bean to session bean? (as opposed to web component to session bean). Thanks and Regards Ryan
RE: Local interfaces difference ???
Just picking up on Scott's request... the change to using copy-by-value=false gave our application on average a 20% speedup. The application only uses Remote interfaces at present. The testing was carried out using JUnit+HTTPUnit to execute multiple passes of our regression test suite (500+ tests generating HTTP traffic, taking about 2 minutes to execute). Timings were recorded before and after the change was made. Jon -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Scott Farquhar Sent: 07 March 2002 00:06 To: Orion-Interest Subject: Re: Local interfaces difference ??? There is a workaround that has been in Orion for a while - by specifying that your beans are executed in the same container, you save the marshalling remote calls that normal EJB uses. In orion-ejb-jar.xml, you can set copy-by-value=false, which will pass by reference instead. http://kb.atlassian.com/content/orion/docs/deployment/orion-ejb-ja r.xml.html If you do any performance testing, please let me know the differences in speed. Of course - you can still use local interfaces to achieve the same thing. Cheers, Scott
Re: Caching Group Information
Christian, Joanne wrote: Hi All, I am using a custom user manager that gets group and user information from the database. I would like to cache the database information when the user manager is initialized; and access the cache to get the user information. Can anyone suggest the best method for doing this? I am thinking about using a hashmap, but I'm not quite sure what is the best option. Thanks, Joanne Hi Joanne. I am using an Entity EJB, and letting the Container worry about how to handle the cache. My UserEJB actually loads itself from several tables, and has two hashmaps and some rather complex objects. Of course, this has to be done using BeanManaged Persistance, but actually works quite smoothly. Among other things, this is key to how the security model for my application works. In the EJB specs, there is a method called getHandle(), which returns a small, serializable object, that can be passed around and/or stored in Hashmaps or other objects. It can be used to obtain a remote interface to a specific EJB w/o having to do a home lookup and a findByXXX call. (userHandle.getEJBObject does the trick). With this method, if the EJB is being used, container keeps it around. If/when not being used, container releases it (supposedly). And as this is handled by the container, you do not have to write the code to load/release the user data. And this method is also expandable into a cluster (only one instance of Entity EJB per cluster, + backup copies, with cluster worrying about how to keep data syncronized, not you). -Steve -- Stephen Davidson Java Consultant Delphi Consultants, LLC http://www.delphis.com Phone: 214-696-6224 x208
Re: Local interfaces difference ???
Because SOMEONE (I'm not going to mention BEA's name) couldn't see their way around actually optimizing that way. There is an actual performance benefit, I suppose, in that local interfaces and home objects don't throw RemoteException, but personally, I think this is a sign that Sun was serious when they put the black hole in .com. - Joseph B. Ottinger [EMAIL PROTECTED] http://enigmastation.comIT Consultant On Thu, 7 Mar 2002, Greg Matthews wrote: and can anyone shed some light on why this has even been put in the J2EE spec. Visibroker for Java automatically detected if the client was local and then handed out a client stub that did not do marshalling, i.e. performed an in-process local java method call. I would have thought that the whole concept of Local references was just an optimisation that a vendor provided based on common sense. Why is it in the spec? Greg. - Original Message - From: Eddie Post [EMAIL PROTECTED] To: Orion-Interest [EMAIL PROTECTED] Sent: Thursday, March 07, 2002 4:54 AM Subject: Local interfaces difference ??? Hellu, Can someone tell me what the performance boost is when you change your remote and home interfaces to local interfaces with Orion 1.5.4 ? I did this but I know that with Bea you could already indicate if your beans and clients were located on the same machine such that it already had some kind of local workaround. I was wandering how Orion did and does this ?? Eddie _ Send and receive Hotmail on your mobile device: http://mobile.msn.com
Connection timeout of persistent connections (Keep-Alive)
Hello, is it possible to configure the connection timeout for persistent HTTP connections? When I use the Connection: keep-alive header in my HTTP request, I always get the following header field in the response from Orion HTTP server: Keep-Alive: timeout=15, max=100 This indicates that the session is being kept alive for a maximum of 100 requests and a per-request timeout of 15 seconds. I would need to keep the connection active for a longer period, but I could not find any configuration option in Orion. Thanks in advance Michal Palicka Cleverlance Prague, Czech Republic
remove
Please remove me. Thanks.
HTTP Reponse TimeOut Parameter in Orion
Hi All, How to configure http response time out parameter in OC4J? By default it is getting timedout after 5 minutes. Please advice. Regards, Anand
JDBC connection leak
Hello!
I call the following code in a Message Driven Bean in Orion 1.5.2. After the
conn.close() all entity beans I created in some code before are destroyed.
The database is empty. The sql statement gets the right result but after the
close everything is lost. No error, nothing. Without the close statement
Orion says that there is a leaked connection and that I have to close it:
==
OrionCMTConnection not closed, check your code!
LogicalDriverManagerXAConnection not closed, check your code!
(Use -Djdbc.connection.debug=true to find out where the leaked connection
was created)
==
Can anybody help me?
Thanks in advance.
Marc Lehnert,.
The code:
PreparedStatement stmt = null;
java.sql.Timestamp siteEndDate;
java.sql.Timestamp siteBeginDate;
try {
javax.sql.DataSource ds =
(javax.sql.DataSource)jndiContext.lookup(jdbc/sapdbDS);
Connection conn = ds.getConnection();
//Connection conn =
ConnectionFactory.getConnection(jdbc/sapdbDS);
String sqlStatement = select max(rw_datetime),
min(rw_datetime) from logfilerow where rw_websiteid = ?;
stmt = conn.prepareStatement(sqlStatement);
stmt.setString(1, websiteid);
ResultSet rs = stmt.executeQuery();
rs.next();
siteEndDate = rs.getTimestamp(1);
siteBeginDate = rs.getTimestamp(2);
conn.close();
} catch (Exception e) {
e.printStackTrace();
throw e;
}
RE: remove
It appears that you have sent your request to the wrong mailing list. Please submit your request to a mailing list for contract killers and your request may get carried out :-) -Original Message- From: Valentina Kateneva [mailto:[EMAIL PROTECTED]] Sent: Thursday, March 07, 2002 12:36 PM To: Orion-Interest Subject: remove Please remove me. Thanks.
Performance declines after moving to a faster Server
Hi, we are running a simple web applications - just servlets - on an older Windows NT Server with two Pentium two 233 MHz CPUs. The performance on the server was acceptable and pages showed up pretty quickly in the browsers. Now we bought a new server (still Windows NT) with two Pentium III Xeon 8xx MHz CPUs (same amount of memory) and moved the application to the new server. We expected that the performance would increase because of the faster CPUs but the opposite happened. Our first tests showed a dramatic increase of response time. Pages that showed up in just one or two seconds on the old server, now take ten and more seconds to show up. We start Orion with the same java runtime parameters as on the old server. Also the configuration of the Apache server that we use a front end to Orion did not change. Does anyone have an idea how this performance decline is possible? Shouldn't it be faster on fastes CPUs?
Dependent Object Relationship Fails in 1.5.4
I have Entity-DependentObject relationship that works fine on Orion 1.5.3. When the same application is Deployed in Orion 1.5.4, I get the following error: Unknown relationship-role-source target in relationship role 'ParameterDefinition-belongsto-Template': 'null', no entity correspondingto that ejb-name, see section 10.3.13 of the EJB specification I have looked at the EJB spec section 10.3.13 but there is no helpful information there regarding this. I have the following code in my ejb-jar.xml: !-- The Template entity -- enterprise-beans entity description/description abstract-schema-name/abstract-schema-name ejb-nameTemplate/ejb-name homecom.img.eye2eye.database.TemplateHome/home remotecom.img.eye2eye.database.Template/remote ejb-classcom.img.eye2eye.database.TemplateEJB/ejb-class persistence-typeContainer/persistence-type prim-key-classjava.lang.Integer/prim-key-class reentrantFalse/reentrant cmp-fieldfield-nameid/field-name/cmp-field cmp-fieldfield-namename/field-name/cmp-field cmp-fieldfield-namedescription/field-name/cmp-field cmp-fieldfield-namefileType/field-name/cmp-field cmp-fieldfield-nameowner/field-name/cmp-field cmp-fieldfield-namegroup/field-name/cmp-field cmp-fieldfield-nameparameterDefinitions/field-name/cmp-field cmp-fieldfield-namesize/field-name/cmp-field primkey-fieldid/primkey-field /entity /enterprise-beans !--The Relation -- relationships ejb-relation ejb-relation-nameTemplate-ParameterDefinition/ejb-relation-name ejb-relationship-role ejb-relationship-role-nameTemplate-has-ParameterDefinition/ejb-relationship-role-name multiplicityone/multiplicity relationship-role-sourceejb-nameTemplate/ejb-name/relationship-role-source cmr-field cmr-field-nameparameterDefinitions/cmr-field-name cmr-field-typejava.util.Set/cmr-field-type /cmr-field /ejb-relationship-role ejb-relationship-role ejb-relationship-role-nameParameterDefinition-belongsto-Template/ejb-relationship-role-name multiplicitymany/multiplicity relationship-role-sourcedependent-nameParameterDefinition/dependent-name/relationship-role-source cmr-field cmr-field-nametemplate/cmr-field-name cmr-field-typecom.img.eye2eye.database.Template/cmr-field-type /cmr-field /ejb-relationship-role /ejb-relation/relationships !--The Dependent -- dependents dependent dependent-classcom.img.eye2eye.database.ParameterDefinition/dependent-class dependent-nameParameterDefinition/dependent-name cmp-fieldfield-nametemplate/field-name/cmp-field cmp-fieldfield-nameid/field-name/cmp-field cmp-fieldfield-namename/field-name/cmp-field cmp-fieldfield-nametype/field-name/cmp-field cmp-fieldfield-namedescription/field-name/cmp-field cmp-fieldfield-nameoptions/field-name/cmp-field /dependent /dependents Any ideas of what could be going on here? Thanks Emil
RE: Caching Group Information
That's what I do :). The only thing you might need to worry about is that the data in the security table changes after you load up the hash map. What I usually do is if the user is not found I reload the map and try one more time. Regards, _ Robert Moskal Most Media Brooklyn, USA -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Stephen Davidson Sent: Thursday, March 07, 2002 7:12 AM To: Orion-Interest Subject: Re: Caching Group Information Christian, Joanne wrote: Hi All, I am using a custom user manager that gets group and user information from the database. I would like to cache the database information when the user manager is initialized; and access the cache to get the user information. Can anyone suggest the best method for doing this? I am thinking about using a hashmap, but I'm not quite sure what is the best option. Thanks, Joanne Hi Joanne. I am using an Entity EJB, and letting the Container worry about how to handle the cache. My UserEJB actually loads itself from several tables, and has two hashmaps and some rather complex objects. Of course, this has to be done using BeanManaged Persistance, but actually works quite smoothly. Among other things, this is key to how the security model for my application works. In the EJB specs, there is a method called getHandle(), which returns a small, serializable object, that can be passed around and/or stored in Hashmaps or other objects. It can be used to obtain a remote interface to a specific EJB w/o having to do a home lookup and a findByXXX call. (userHandle.getEJBObject does the trick). With this method, if the EJB is being used, container keeps it around. If/when not being used, container releases it (supposedly). And as this is handled by the container, you do not have to write the code to load/release the user data. And this method is also expandable into a cluster (only one instance of Entity EJB per cluster, + backup copies, with cluster worrying about how to keep data syncronized, not you). -Steve -- Stephen Davidson Java Consultant Delphi Consultants, LLC http://www.delphis.com Phone: 214-696-6224 x208
How does passivation work?
I am interested to know how does Orion Container treat the ejbPassivatemethod of an CMP entity-bean. Does it by any chance Deletes a record in theDB and then recreates it?The problem I'm facing is the following: I have a one-to-many relationshipin the DB. I have one entity bean (A) that has a List member. The listmember contains objects of class B. If I reinforce the FK constraint betweenthe tables entity A and class B are stored in, I get an Oracle error statingthe there was a FK violation, there were child records found. If I createthe child table with the ON DELETE CASCADE directive, the error dissapears,but in the DB the child record is deleted and only the parent remains. Theerror is thrown immediately after the ejbPassivate is called. This suggeststhat during passivation the parent record is deleted and recreated. When thetables are created with ON DELETE CASCADE this works, although the child ispermanently deleted. Otherwise, when trying to delete the parent Oraclereacts with an error that is caught by me.Is all this true? If yes, is there any way around it?Thanks,Cristi
Re: JDBC connection leak
Hi Marc.
Maybe try a conn.commit() before conn.close()?
-Steve
Marc Lehnert wrote:
Hello!
I call the following code in a Message Driven Bean in Orion 1.5.2. After the
conn.close() all entity beans I created in some code before are destroyed.
The database is empty. The sql statement gets the right result but after the
close everything is lost. No error, nothing. Without the close statement
Orion says that there is a leaked connection and that I have to close it:
==
OrionCMTConnection not closed, check your code!
LogicalDriverManagerXAConnection not closed, check your code!
(Use -Djdbc.connection.debug=true to find out where the leaked connection
was created)
==
Can anybody help me?
Thanks in advance.
Marc Lehnert,.
The code:
PreparedStatement stmt = null;
java.sql.Timestamp siteEndDate;
java.sql.Timestamp siteBeginDate;
try {
javax.sql.DataSource ds =
(javax.sql.DataSource)jndiContext.lookup(jdbc/sapdbDS);
Connection conn = ds.getConnection();
//Connection conn =
ConnectionFactory.getConnection(jdbc/sapdbDS);
String sqlStatement = select max(rw_datetime),
min(rw_datetime) from logfilerow where rw_websiteid = ?;
stmt = conn.prepareStatement(sqlStatement);
stmt.setString(1, websiteid);
ResultSet rs = stmt.executeQuery();
rs.next();
siteEndDate = rs.getTimestamp(1);
siteBeginDate = rs.getTimestamp(2);
conn.close();
} catch (Exception e) {
e.printStackTrace();
throw e;
}
--
Stephen Davidson
Java Consultant
Delphi Consultants, LLC
http://www.delphis.com
Phone: 214-696-6224 x208
RE: JDBC connection leak
Hi,
Not sure if this is what your looking for but you should really close all
associations to the connection
cause I think that the way CMT works with orion is that the close method
merely returns it to the pool
so you should do the following before you close:
stmt = conn.prepareStatement(sqlStatement);
stmt.setString(1, websiteid);
ResultSet rs = stmt.executeQuery();
rs.next();
siteEndDate = rs.getTimestamp(1);
siteBeginDate = rs.getTimestamp(2);
// Here
rs.close ();
stmt.close ();
conn.close();
This means that the connection is now free for the CMT to use again (I THINK
;)
john
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of Marc Lehnert
Sent: 07 March 2002 15:56
To: Orion-Interest
Subject: JDBC connection leak
Hello!
I call the following code in a Message Driven Bean in Orion 1.5.2. After the
conn.close() all entity beans I created in some code before are destroyed.
The database is empty. The sql statement gets the right result but after the
close everything is lost. No error, nothing. Without the close statement
Orion says that there is a leaked connection and that I have to close it:
==
OrionCMTConnection not closed, check your code!
LogicalDriverManagerXAConnection not closed, check your code!
(Use -Djdbc.connection.debug=true to find out where the leaked connection
was created)
==
Can anybody help me?
Thanks in advance.
Marc Lehnert,.
The code:
PreparedStatement stmt = null;
java.sql.Timestamp siteEndDate;
java.sql.Timestamp siteBeginDate;
try {
javax.sql.DataSource ds =
(javax.sql.DataSource)jndiContext.lookup(jdbc/sapdbDS);
Connection conn = ds.getConnection();
//Connection conn =
ConnectionFactory.getConnection(jdbc/sapdbDS);
String sqlStatement = select max(rw_datetime),
min(rw_datetime) from logfilerow where rw_websiteid = ?;
stmt = conn.prepareStatement(sqlStatement);
stmt.setString(1, websiteid);
ResultSet rs = stmt.executeQuery();
rs.next();
siteEndDate = rs.getTimestamp(1);
siteBeginDate = rs.getTimestamp(2);
conn.close();
} catch (Exception e) {
e.printStackTrace();
throw e;
}
remove
Please remove me. Thanks, Steve
Re: Performance declines after moving to a faster Server
NT offers a near infinate number of causes for slowness. Start by installing a good defrag'er and defrag all disks. Your new box may have dog slow disks? Eh? How about size of L2 Cache? Do the PIII's have same size L2 cach as the PII's which I think where all 256Kb... Or maybe there where a bread of early PII's that had 512Kb? Your new box may have a slow as molasis NIC or a crapie driver with your new install of NT. Here's a set of tools to test: - Ftp to both boxes from a 3rd box of a large file (50Mb) time it. This will test both the NIC the LAN and a much lesser extent the disks. - find iozone it's a common tool on unix, I found a copy for NT. It's great a measuring disk io. - Check that your NIC is hard set to full or half duplex. Don't let it choose via auto. * This might be your problem. * Good luck, curt Cugier (extern) wrote: Hi, we are running a simple web applications - just servlets - on an older Windows NT Server with two Pentium two 233 MHz CPUs. The performance on the server was acceptable and pages showed up pretty quickly in the browsers. Now we bought a new server (still Windows NT) with two Pentium III Xeon 8xx MHz CPUs (same amount of memory) and moved the application to the new server. We expected that the performance would increase because of the faster CPUs but the opposite happened. Our first tests showed a dramatic increase of response time. Pages that showed up in just one or two seconds on the old server, now take ten and more seconds to show up. We start Orion with the same java runtime parameters as on the old server. Also the configuration of the Apache server that we use a front end to Orion did not change. Does anyone have an idea how this performance decline is possible? Shouldn't it be faster on fastes CPUs? -- Curt Smith [EMAIL PROTECTED] (w) 404-463-0973 (h) 404-294-6686
Re: How does passivation work?
Probably the easiest way to solve this would be to turn database logging on, and then see what SQL statements are being run on your db when Orion runs. Cheers, Scott Cristian Donciulescu wrote: I am interested to know how does Orion Container treat the ejbPassivate method of an CMP entity-bean. Does it by any chance Deletes a record in the DB and then recreates it? The problem I'm facing is the following: I have a one-to-many relationship in the DB. I have one entity bean (A) that has a List member. The list member contains objects of class B. If I reinforce the FK constraint between the tables entity A and class B are stored in, I get an Oracle error stating the there was a FK violation, there were child records found. If I create the child table with the ON DELETE CASCADE directive, the error dissapears, but in the DB the child record is deleted and only the parent remains. The error is thrown immediately after the ejbPassivate is called. This suggests that during passivation the parent record is deleted and recreated. When the tables are created with ON DELETE CASCADE this works, although the child is permanently deleted. Otherwise, when trying to delete the parent Oracle reacts with an error that is caught by me. Is all this true? If yes, is there any way around it? Thanks, Cristi -- Scott Farquhar :: [EMAIL PROTECTED] Atlassian :: http://www.atlassian.com Supporting YOUR J2EE World
Accessing Orion EJB from Weblogic JSP
Hello, Has anyone successfully used an EJB running in Orion from a JSP running in Weblogic? I have tried several things but can not get Weblogic to connect to Orion I was hoping it would be as simple as creating a JNDI context with the Orion provfider URL and RMI context factory, but that does not help. Thanks, Vidur -- Vidur Dhanda Epistemic Corporation tel: 617/566-1252 fax: 509/693-1248 cell: 617/821-7115 ICQ: 129193878 [EMAIL PROTECTED] www.epistemic.com
Tomcat with Orion /Apteach with Orion
Hello, Can any one explain me how to configure Orion as a application server And Tomcat /Aptech as a web server. does It require any plugin. If can one know pl reply me fast . Its very important sachin __ Do You Yahoo!? Try FREE Yahoo! Mail - the world's greatest free email! http://mail.yahoo.com/
