2008/2/25, Jacek Laskowski <[EMAIL PROTECTED]>: > > On Mon, Feb 25, 2008 at 12:20 PM, Mario Kofler <[EMAIL PROTECTED]> > wrote: > > > so there is a simple reason why i decided to close the entity manager > > explicitely: because i thought it is a good idea ;) > > > And you didn't get any exception?! It's disallowed to play with server > managed resources and close them just like you tried to do. The reason > people are still using EJB3 and all the Java EE 5 stack is their > simplicity (or attempt to be simple) as far as resources are > concerned. You just use them and don't have to worry about managing > them - that's the role of Geronimo or other less-feature-rich > application servers ;-) Use it and when you're done forget about them. > Geronimo takes care of them for you. > > > em.flush(); > > Don't do that. Forget about managing resources by yourself and let > Geronimo do that for you. Besides, it's also not recommended unless > you're using RESOURCE_LOCAL PU which is not recommended in the managed > environment like Geronimo either.
i think there was some reason why i called em.flush() but i commented it out now and it seems to work fine too. if i run into some problem i will tell ;) Show us the persistence.xml. Let's make it better/simpler/shorter > (cross out or add any word you'd like to hear about your app ;-)). The > less you write it's better for your app. That's why Geronimo (or other > Java EE 5 app servers) are for. ok thanks here is my persistence.xml: <persistence xmlns="http://java.sun.com/xml/ns/persistence"; xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"; xsi:schemaLocation=" http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd"; version="1.0"> <persistence-unit name="valhalla" transaction-type="JTA"> <description>videothek</description> <provider>org.apache.openjpa.persistence.PersistenceProviderImpl </provider> <class>vt.bean.entity.Person</class> <class>vt.bean.entity.Actor</class> <class>vt.bean.entity.Director</class> <class>vt.bean.entity.Movie</class> <class>vt.bean.entity.Dvd</class> <properties> <property name="openjpa.jdbc.DBDictionary" value="postgres"/> </properties> <jta-data-source>jdbc/postgres</jta-data-source> <non-jta-data-source>jdbc/postgres</non-jta-data-source> </persistence-unit> </persistence> it took me some configuration time to get it working this way and i think it is already as short as it can get ;) so another thing is when i keep calling the bean repeatedly to insert 1 director per transaction as in a performance test after about 100 inserts it is the first time i get an exception. the server continues inserting to the db but the exception is coming every now and then.. i wonder what it means.. i don't want to just throw exceptions here, but maybe you see it with one eye, taking a short look.. thanks in anyway, here is the stacktrace: [exec] EM created! [exec] Write of 1 Directors successful! [exec] EM created! [exec] Write of 1 Directors successful! [exec] EM created! [exec] Write of 1 Directors successful! [exec] javax.naming.NamingException: Could not look up : ejb/WriteDataBean [Root exception is java.lang.reflect.UndeclaredThrowableException] [exec] at org.apache.xbean.naming.context.ContextUtil.resolve( ContextUtil.java:65) [exec] at org.apache.xbean.naming.context.AbstractContext.lookup( AbstractContext.java:118) [exec] at org.apache.xbean.naming.context.AbstractContext.lookup( AbstractContext.java:617) [exec] at org.apache.xbean.naming.context.AbstractContext.lookup( AbstractContext.java:158) [exec] at org.apache.xbean.naming.context.AbstractContext.lookup( AbstractContext.java:617) [exec] at org.apache.xbean.naming.context.AbstractContext.lookup( AbstractContext.java:158) [exec] at org.apache.xbean.naming.context.AbstractContext.lookup( AbstractContext.java:603) [exec] at javax.naming.InitialContext.lookup(InitialContext.java :392) [exec] at vt.servlet.AddServlet.doGet(AddServlet.java:46) [exec] at javax.servlet.http.HttpServlet.service(HttpServlet.java :693) [exec] at javax.servlet.http.HttpServlet.service(HttpServlet.java :806) [exec] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter( ApplicationFilterChain.java:290) [exec] at org.apache.catalina.core.ApplicationFilterChain.doFilter( ApplicationFilterChain.java:206) [exec] at org.apache.catalina.core.StandardWrapperValve.invoke( StandardWrapperValve.java:230) [exec] at org.apache.catalina.core.StandardContextValve.invoke( StandardContextValve.java:175) [exec] at org.apache.geronimo.tomcat.valve.DefaultSubjectValve.invoke( DefaultSubjectValve.java:56) [exec] at org.apache.geronimo.tomcat.GeronimoStandardContext$SystemMethodValve.invoke( GeronimoStandardContext.java:353) [exec] at org.apache.geronimo.tomcat.valve.GeronimoBeforeAfterValve.invoke( GeronimoBeforeAfterValve.java:47) [exec] at org.apache.catalina.core.StandardHostValve.invoke( StandardHostValve.java:128) [exec] at org.apache.catalina.valves.ErrorReportValve.invoke( ErrorReportValve.java:104) [exec] at org.apache.catalina.core.StandardEngineValve.invoke( StandardEngineValve.java:109) [exec] at org.apache.catalina.valves.AccessLogValve.invoke( AccessLogValve.java:563) [exec] at org.apache.catalina.connector.CoyoteAdapter.service( CoyoteAdapter.java:261) [exec] at org.apache.coyote.http11.Http11Processor.process( Http11Processor.java:844) [exec] at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process( Http11Protocol.java:581) [exec] at org.apache.tomcat.util.net.JIoEndpoint$Worker.run( JIoEndpoint.java:447) [exec] at java.lang.Thread.run(Thread.java:619) [exec] Caused by: java.lang.reflect.UndeclaredThrowableException [exec] at $Proxy22.create(Unknown Source) [exec] at org.apache.openejb.core.ivm.naming.BusinessRemoteReference.getObject( BusinessRemoteReference.java:33) [exec] at org.apache.openejb.core.ivm.naming.IvmContext.lookup( IvmContext.java:150) [exec] at org.apache.openejb.core.ivm.naming.IntraVmJndiReference.getObject( IntraVmJndiReference.java:38) [exec] at org.apache.openejb.core.ivm.naming.Reference.getContent( Reference.java:40) [exec] at org.apache.xbean.naming.context.ContextUtil.resolve( ContextUtil.java:61) [exec] ... 26 more [exec] Caused by: java.rmi.RemoteException: Container has suffered a SystemException; nested exception is: [exec] java.io.NotSerializableException: org.apache.openjpa.persistence.EntityManagerImpl [exec] at org.apache.openejb.core.ivm.EjbHomeProxyHandler._invoke( EjbHomeProxyHandler.java:243) [exec] at org.apache.openejb.core.ivm.BaseEjbProxyHandler.invoke( BaseEjbProxyHandler.java:245) [exec] at org.apache.openejb.util.proxy.Jdk13InvocationHandler.invoke( Jdk13InvocationHandler.java:49) [exec] ... 32 more [exec] Caused by: java.io.NotSerializableException: org.apache.openjpa.persistence.EntityManagerImpl [exec] at java.io.ObjectOutputStream.writeObject0( ObjectOutputStream.java:1156) [exec] at java.io.ObjectOutputStream.defaultWriteFields( ObjectOutputStream.java:1509) [exec] at java.io.ObjectOutputStream.writeSerialData( ObjectOutputStream.java:1474) [exec] at java.io.ObjectOutputStream.writeOrdinaryObject( ObjectOutputStream.java:1392) [exec] at java.io.ObjectOutputStream.writeObject0( ObjectOutputStream.java:1150) [exec] at java.io.ObjectOutputStream.defaultWriteFields( ObjectOutputStream.java:1509) [exec] at java.io.ObjectOutputStream.writeSerialData( ObjectOutputStream.java:1474) [exec] at java.io.ObjectOutputStream.writeOrdinaryObject( ObjectOutputStream.java:1392) [exec] at java.io.ObjectOutputStream.writeObject0( ObjectOutputStream.java:1150) [exec] at java.io.ObjectOutputStream.defaultWriteFields( ObjectOutputStream.java:1509) [exec] at java.io.ObjectOutputStream.writeSerialData( ObjectOutputStream.java:1474) [exec] at java.io.ObjectOutputStream.writeOrdinaryObject( ObjectOutputStream.java:1392) [exec] at java.io.ObjectOutputStream.writeObject0( ObjectOutputStream.java:1150) [exec] at java.io.ObjectOutputStream.writeObject( ObjectOutputStream.java:326) [exec] at org.apache.openejb.core.stateful.SimplePassivater.passivate( SimplePassivater.java:73) [exec] at org.apache.openejb.core.stateful.SimplePassivater.passivate( SimplePassivater.java:93) [exec] at org.apache.openejb.core.stateful.StatefulInstanceManager.passivate( StatefulInstanceManager.java:487) [exec] at org.apache.openejb.core.stateful.StatefulInstanceManager$BeanEntryQueue.add( StatefulInstanceManager.java:579) [exec] at org.apache.openejb.core.stateful.StatefulInstanceManager.poolInstance( StatefulInstanceManager.java:413) [exec] at org.apache.openejb.core.stateful.StatefulContainer.createEJBObject( StatefulContainer.java:291) [exec] at org.apache.openejb.core.stateful.StatefulContainer.invoke (StatefulContainer.java:241) [exec] at org.apache.openejb.core.ivm.EjbHomeProxyHandler.create( EjbHomeProxyHandler.java:267) [exec] at org.apache.openejb.core.ivm.EjbHomeProxyHandler._invoke( EjbHomeProxyHandler.java:158) [exec] ... 34 more [exec] EM created! [exec] Write of 1 Directors successful! [exec] EM created! [exec] Write of 1 Directors successful! greetings, mario
