Hello,
I somehow manage to get a LazyInitializationException when I use Seam-managed
transactions.
What I want to do is retrieve an id from a request, load the usecase with said
id and make it available to my jsf page - just like the dvd.xhtml in the dvd
store example does for dvds.
When I use @Factory it works fine, but when I try to use page actions and @Out
the usecase I get a LIE when it tries to access the first collection attribute
(the application frame is generated with seam-gen and unmodified, I use Seam
1.1CR2 and JBoss AS 4.0.5).
My Bean:
@Stateful
| @Name("usecasesBean")
| public class UsecasesBean implements Usecases {
|
| @PersistenceContext
| private EntityManager em;
|
| @In(required=false, scope=ScopeType.EVENT)
| private String usecaseId;
|
| @Out(required = false)
| private Usecase usecase;
|
| @DataModel
| List<Usecase> usecases;
|
| @SuppressWarnings("unchecked")
| @Factory("usecases")
| public void findAllUsecases() {
| System.out.println("findAllUsecases...");
| System.out.println("usecaseId: " + usecaseId);
| usecases = (List<Usecase>) em.createQuery("Select u from
Usecase u order by u.name").getResultList();
| }
|
| public void loadUsecaseById() {
| System.out.println("loadById...");
| if(usecaseId == null) {
| System.out.println("usecaseId was null");
| usecaseId = "1";
| }
| this.usecase = em.find(Usecase.class,
Long.parseLong(usecaseId));
| System.out.println("Usecase: " + usecase.getName());
| }
|
| // @Factory("usecase")
| // public Usecase loadUsecaseById() {
| // System.out.println("loadById...");
| // if(usecaseId == null) {
| // System.out.println("usecaseId was null");
| // usecaseId = "1";
| // }
| // return em.find(Usecase.class, Long.parseLong(usecaseId));
| // }
| }
My pages.xml:<pages>
| <page view-id="/showUsecase.xhtml"
action="#{usecasesBean.loadUsecaseById}" />
| </pages>
TransactionalSeamPhaseListener is loaded in faces-config.xml.
When I exchange the loadUsecaseById() methods, comment the @Out usecase out and
remove the pages.xml this works fine but the way above I get the following
exception:
01:35:21,631 INFO [STDOUT] findAllUsecases...
| 01:35:21,635 INFO [STDOUT] usecaseId: null
| 01:35:21,667 INFO [STDOUT] Hibernate: select usecase0_.ID as ID210_,
usecase0_.summary as summary210_, usecase0_.standardWorkflow as standard7_210_,
usecase0_.name as name210_, usecase0_.priority as priority210_,
usecase0_.version as version210_, usecase0_.status as status210_ from Usecase
usecase0_ order by usecase0_.name
| 01:35:23,555 INFO [STDOUT] Filtering URL ...
| 01:35:23,567 INFO [STDOUT] loadById...
| 01:35:23,570 INFO [STDOUT] Hibernate: select usecase0_.ID as ID210_0_,
usecase0_.summary as summary210_0_, usecase0_.standardWorkflow as
standard7_210_0_, usecase0_.name as name210_0_, usecase0_.priority as
priority210_0_, usecase0_.version as version210_0_, usecase0_.status as
status210_0_ from Usecase usecase0_ where usecase0_.ID=?
| 01:35:23,583 INFO [STDOUT] Usecase: Login User
| 01:35:23,635 ERROR [LazyInitializationException] failed to lazily
initialize a collection of role: com.example.usecases.model.Usecase.actors, no
session or session was closed
| org.hibernate.LazyInitializationException: failed to lazily initialize a
collection of role: com.example.usecases.model.Usecase.actors, no session or
session was closed
| at
org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationException(AbstractPersistentCollection.java:358)
| at
org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationExceptionIfNotConnected(AbstractPersistentCollection.java:350)
| at
org.hibernate.collection.AbstractPersistentCollection.readSize(AbstractPersistentCollection.java:97)
| at org.hibernate.collection.PersistentBag.size(PersistentBag.java:225)
| at javax.faces.model.ListDataModel.isRowAvailable(ListDataModel.java:84)
| at javax.faces.model.ListDataModel.setRowIndex(ListDataModel.java:97)
| at
javax.faces.model.ListDataModel.setWrappedData(ListDataModel.java:111)
| at javax.faces.model.ListDataModel.<init>(ListDataModel.java:42)
| at com.sun.facelets.component.UIRepeat.getDataModel(UIRepeat.java:127)
| at com.sun.facelets.component.UIRepeat.setIndex(UIRepeat.java:305)
| at com.sun.facelets.component.UIRepeat.process(UIRepeat.java:333)
| at com.sun.facelets.component.UIRepeat.encodeChildren(UIRepeat.java:617)
| at
com.sun.facelets.tag.jsf.ComponentSupport.encodeRecursive(ComponentSupport.java:234)
| at
com.sun.facelets.tag.jsf.ComponentSupport.encodeRecursive(ComponentSupport.java:239)
| at
com.sun.facelets.FaceletViewHandler.renderView(FaceletViewHandler.java:580)
| at
org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:384)
| at javax.faces.webapp.FacesServlet.service(FacesServlet.java:138)
| at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
| at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
| at
org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:672)
| at
org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:463)
| at
org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:398)
| at
org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:301)
| at
com.example.usecases.web.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:60)
| at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
| at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
| at
org.jboss.seam.servlet.SeamRedirectFilter.doFilter(SeamRedirectFilter.java:32)
| at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
| at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
| at
org.jboss.seam.servlet.SeamExceptionFilter.doFilter(SeamExceptionFilter.java:46)
| at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
| at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
| at
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
| at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
| at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
| at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
| at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
| at
org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:175)
| at
org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:74)
| at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
| at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
| at
org.jboss.web.tomcat.tc5.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:156)
| at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
| at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
| at
org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:833)
| at
org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:639)
| at
org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1285)
| at java.lang.Thread.run(Thread.java:595)
| 01:35:23,640 ERROR [STDERR] 07.12.2006 01:35:23
com.sun.facelets.FaceletViewHandler handleRenderException
| SCHWERWIEGEND: Error Rendering View[/showUsecase.xhtml]
| org.hibernate.LazyInitializationException: failed to lazily initialize a
collection of role: com.example.usecases.model.Usecase.actors, no session or
session was closed
| at
org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationException(AbstractPersistentCollection.java:358)
| at
org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationExceptionIfNotConnected(AbstractPersistentCollection.java:350)
| at
org.hibernate.collection.AbstractPersistentCollection.readSize(AbstractPersistentCollection.java:97)
| at org.hibernate.collection.PersistentBag.size(PersistentBag.java:225)
| at javax.faces.model.ListDataModel.isRowAvailable(ListDataModel.java:84)
| at javax.faces.model.ListDataModel.setRowIndex(ListDataModel.java:97)
| at
javax.faces.model.ListDataModel.setWrappedData(ListDataModel.java:111)
| at javax.faces.model.ListDataModel.<init>(ListDataModel.java:42)
| at com.sun.facelets.component.UIRepeat.getDataModel(UIRepeat.java:127)
| at com.sun.facelets.component.UIRepeat.setIndex(UIRepeat.java:305)
| at com.sun.facelets.component.UIRepeat.process(UIRepeat.java:333)
| at com.sun.facelets.component.UIRepeat.encodeChildren(UIRepeat.java:617)
| at
com.sun.facelets.tag.jsf.ComponentSupport.encodeRecursive(ComponentSupport.java:234)
| at
com.sun.facelets.tag.jsf.ComponentSupport.encodeRecursive(ComponentSupport.java:239)
| at
com.sun.facelets.FaceletViewHandler.renderView(FaceletViewHandler.java:580)
| at
org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:384)
| at javax.faces.webapp.FacesServlet.service(FacesServlet.java:138)
| at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
| at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
| at
org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:672)
| at
org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:463)
| at
org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:398)
| at
org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:301)
| at
com.example.usecases.web.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:60)
| at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
| at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
| at
org.jboss.seam.servlet.SeamRedirectFilter.doFilter(SeamRedirectFilter.java:32)
| at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
| at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
| at
org.jboss.seam.servlet.SeamExceptionFilter.doFilter(SeamExceptionFilter.java:46)
| at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
| at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
| at
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
| at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
| at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
| at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
| at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
| at
org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:175)
| at
org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:74)
| at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
| at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
| at
org.jboss.web.tomcat.tc5.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:156)
| at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
| at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
| at
org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:833)
| at
org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:639)
| at
org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1285)
| at java.lang.Thread.run(Thread.java:595)
| 01:35:23,676 ERROR [LazyInitializationException] could not initialize proxy
- the owning Session was closed
| org.hibernate.LazyInitializationException: could not initialize proxy - the
owning Session was closed
| at
org.hibernate.proxy.AbstractLazyInitializer.initialize(AbstractLazyInitializer.java:60)
| at
org.hibernate.proxy.AbstractLazyInitializer.getImplementation(AbstractLazyInitializer.java:111)
| at
org.hibernate.proxy.pojo.javassist.JavassistLazyInitializer.invoke(JavassistLazyInitializer.java:198)
| at
com.example.usecases.model.Workflow_$$_javassist_87.getWorkflowSteps(Workflow_$$_javassist_87.java)
| at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
| at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
| at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
| at java.lang.reflect.Method.invoke(Method.java:585)
| at
org.apache.myfaces.el.PropertyResolverImpl.getProperty(PropertyResolverImpl.java:438)
| at
org.apache.myfaces.el.PropertyResolverImpl.getValue(PropertyResolverImpl.java:82)
| at
com.sun.facelets.el.LegacyELContext$LegacyELResolver.getValue(LegacyELContext.java:141)
| at com.sun.el.parser.AstValue.getValue(AstValue.java:117)
| at com.sun.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:192)
| at
com.sun.facelets.el.TagValueExpression.getValue(TagValueExpression.java:71)
| at
com.sun.facelets.el.LegacyValueBinding.getValue(LegacyValueBinding.java:56)
| at com.sun.facelets.component.UIRepeat.getValue(UIRepeat.java:143)
| at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
| at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
| at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
| at java.lang.reflect.Method.invoke(Method.java:585)
| at com.sun.facelets.util.DevTools.writeAttributes(DevTools.java:240)
| at com.sun.facelets.util.DevTools.writeStart(DevTools.java:284)
| at com.sun.facelets.util.DevTools.writeComponent(DevTools.java:189)
| at com.sun.facelets.util.DevTools.writeComponent(DevTools.java:207)
| at com.sun.facelets.util.DevTools.debugHtml(DevTools.java:107)
| at
com.sun.facelets.FaceletViewHandler.handleRenderException(FaceletViewHandler.java:677)
| at
com.sun.facelets.FaceletViewHandler.renderView(FaceletViewHandler.java:646)
| at
org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:384)
| at javax.faces.webapp.FacesServlet.service(FacesServlet.java:138)
| at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
| at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
| at
org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:672)
| at
org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:463)
| at
org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:398)
| at
org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:301)
| at
com.example.usecases.web.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:60)
| at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
| at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
| at
org.jboss.seam.servlet.SeamRedirectFilter.doFilter(SeamRedirectFilter.java:32)
| at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
| at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
| at
org.jboss.seam.servlet.SeamExceptionFilter.doFilter(SeamExceptionFilter.java:46)
| at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
| at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
| at
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
| at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
| at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
| at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
| at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
| at
org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:175)
| at
org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:74)
| at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
| at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
| at
org.jboss.web.tomcat.tc5.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:156)
| at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
| at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
| at
org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:833)
| at
org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:639)
| at
org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1285)
| at java.lang.Thread.run(Thread.java:595)
|
As you can see the page function is action is correctly called and the usecase
is loaded from the db but I get a LIE when I access the first collection
attribute (actors.) in my jsf.
Can someone please explain me why this happens.
Thanks a lot in advance.
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