I'm new to using jBPM and am trying to query the jBPM database objects.
I run a query that returns summary data containing the process and the number
of tasks for the process. The summary data is displayed, however, the user then
trys to click a process to display a list of tasks for that process, but
receives a LazyInitializationException instead.
How can I make the jBPM Session behave in similar manner to the seam managed
PC? Is there anyway to make jBPM use seams entity manager instead?
Any ideas on how to solve this problem would be greatly appreciated.
Cheers, Pete.
Named query called jbpm.getProcesses
| SELECT
| count(t.processDefinition.id), t.processDefinition.id
| FROM
| org.jbpm.taskmgmt.exe.PooledActor pooledActor
| JOIN
| pooledActor.taskInstances ti
| JOIN
| ti.task t
| WHERE
| pooledActor.actorId in ( :actorIds )
| AND
| ti.actorId is null
| AND
| ti.isSuspended != true
| AND
| ti.isOpen = true
| GROUP BY
| t.processDefinition.id
|
Code that is used in a summary process list:
| public List<ProcessResult> getProcessSummary(List<String> pooledActorIds)
{
| org.hibernate.Query taskQuery =
jbpmContext.getSession().getNamedQuery("jbpm.getProcesses") ;
| taskQuery.setParameterList("actorIds", pooledActorIds) ;
| List<ProcessResult> results = new ArrayList<ProcessResult>() ;
| List<Object[]> queryResults = taskQuery.list() ;
| for (Object[] result : queryResults) {
| ProcessDefinition process = (ProcessDefinition)
jbpmContext.getSession().load(ProcessDefinition.class, (Serializable)result[1])
;
| results.add(new ProcessResult((Long)result[0], process)) ;
| }
| return results ;
|
Code that causes a LIE
| public Collection<Task> getTasksFromProcess(ProcessResult process) {
| if (process != null) {
| // next line causes LIE
| Map<String, Task> tasks = (Map<String, Task>)
process.getProcess().getTaskMgmtDefinition().getTasks() ;
| return tasks.values() ;
| } else {
| return null;
| }
| }
|
|
The LIE in the log
| org.hibernate.LazyInitializationException: failed to lazily initialize a
collection of role: org.jbpm.graph.def.ProcessDefinition.definitions, 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.readElementByIndex(AbstractPersistentCollection.java:151)
| at org.hibernate.collection.PersistentMap.get(PersistentMap.java:146)
| at
org.jbpm.graph.def.ProcessDefinition.getDefinition(ProcessDefinition.java:431)
| at
org.jbpm.graph.def.ProcessDefinition.getTaskMgmtDefinition(ProcessDefinition.java:444)
| 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:597)
| at
org.hibernate.proxy.pojo.javassist.JavassistLazyInitializer.invoke(JavassistLazyInitializer.java:173)
| at
org.jbpm.graph.def.ProcessDefinition_$$_javassist_95.getTaskMgmtDefinition(ProcessDefinition_$$_javassist_95.java)
| at
uk.co.iblocks.iflow.web.tree.expansion.JbpmExpansion.getProcessSummary(JbpmExpansion.java:402)
| at
uk.co.iblocks.iflow.web.tree.expansion.JbpmExpansion.addTaskNodes(JbpmExpansion.java:129)
| at
uk.co.iblocks.iflow.web.tree.expansion.JbpmExpansion$$FastClassByCGLIB$$b998e405.invoke(<generated>)
| at net.sf.cglib.proxy.MethodProxy.invoke(MethodProxy.java:149)
| at
org.jboss.seam.intercept.RootInvocationContext.proceed(RootInvocationContext.java:45)
| at
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:57)
| at
org.jboss.seam.interceptors.RollbackInterceptor.aroundInvoke(RollbackInterceptor.java:34)
| at
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:69)
| at
org.jboss.seam.interceptors.BijectionInterceptor.aroundInvoke(BijectionInterceptor.java:47)
| at
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:69)
| at
org.jboss.seam.interceptors.BusinessProcessInterceptor.aroundInvoke(BusinessProcessInterceptor.java:51)
| at
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:69)
| at
org.jboss.seam.interceptors.MethodContextInterceptor.aroundInvoke(MethodContextInterceptor.java:27)
| at
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:69)
| at
org.jboss.seam.interceptors.SecurityInterceptor.aroundInvoke(SecurityInterceptor.java:37)
| at
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:69)
| at
org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:103)
| at
org.jboss.seam.intercept.JavaBeanInterceptor.interceptInvocation(JavaBeanInterceptor.java:154)
| at
org.jboss.seam.intercept.JavaBeanInterceptor.intercept(JavaBeanInterceptor.java:89)
| at
uk.co.iblocks.iflow.web.tree.expansion.JbpmExpansion$$EnhancerByCGLIB$$9eed0613.addTaskNodes(<generated>)
| at
uk.co.iblocks.iflow.web.tree.expansion.JbpmExpansion$JbpmType$3.addNodes(JbpmExpansion.java:68)
| at
uk.co.iblocks.iflow.web.tree.expansion.JbpmExpansion.addNodes(JbpmExpansion.java:77)
| at uk.co.iblocks.iflow.web.TreeBean.exploreNode(TreeBean.java:270)
| at
uk.co.iblocks.iflow.web.tree.TreeData$DebugNodeListener.exploreNode(TreeData.java:59)
| at
uk.co.iblocks.iflow.web.tree.TreeData$DebugNodeListener.exploreNode(TreeData.java:59)
| at
uk.co.iblocks.iflow.web.tree.TreeData$DebugNodeListener.exploreNode(TreeData.java:59)
| at uk.co.iblocks.iflow.web.tree.TreeData.setExpanded(TreeData.java:414)
| at
com.icesoft.faces.component.tree.TreeRenderer.decode(TreeRenderer.java:109)
| at
javax.faces.component.UIComponentBase.decode(UIComponentBase.java:500)
| at com.icesoft.faces.component.tree.Tree.processDecodes(Tree.java:857)
| at
javax.faces.component.UIComponentBase.processDecodes(UIComponentBase.java:602)
| at
javax.faces.component.UIComponentBase.processDecodes(UIComponentBase.java:602)
| at
javax.faces.component.UIComponentBase.processDecodes(UIComponentBase.java:602)
| at
javax.faces.component.UIComponentBase.processDecodes(UIComponentBase.java:602)
| at javax.faces.component.UIForm.processDecodes(UIForm.java:53)
| at
javax.faces.component.UIComponentBase.processDecodes(UIComponentBase.java:602)
| at
javax.faces.component.UIComponentBase.processDecodes(UIComponentBase.java:602)
| at
javax.faces.component.UIComponentBase.processDecodes(UIComponentBase.java:602)
| at
javax.faces.component.UIComponentBase.processDecodes(UIComponentBase.java:602)
| at
javax.faces.component.UIComponentBase.processDecodes(UIComponentBase.java:602)
| at
javax.faces.component.UIComponentBase.processDecodes(UIComponentBase.java:602)
| at
javax.faces.component.UIComponentBase.processDecodes(UIComponentBase.java:602)
| at
javax.faces.component.UIComponentBase.processDecodes(UIComponentBase.java:602)
| at
javax.faces.component.UIComponentBase.processDecodes(UIComponentBase.java:602)
| at
javax.faces.component.UIComponentBase.processDecodes(UIComponentBase.java:602)
| at
javax.faces.component.UIComponentBase.processDecodes(UIComponentBase.java:602)
| at
javax.faces.component.UIComponentBase.processDecodes(UIComponentBase.java:602)
| at
javax.faces.component.UIComponentBase.processDecodes(UIComponentBase.java:602)
| at javax.faces.component.UIViewRoot.processDecodes(UIViewRoot.java:135)
| at
org.apache.myfaces.lifecycle.LifecycleImpl.applyRequestValues(LifecycleImpl.java:219)
| at
org.apache.myfaces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:71)
| at
com.icesoft.faces.webapp.xmlhttp.BlockingServlet.renderCyclePartial(BlockingServlet.java:473)
| at
com.icesoft.faces.webapp.xmlhttp.BlockingServlet.receiveUpdates(BlockingServlet.java:442)
| at
com.icesoft.faces.webapp.xmlhttp.BlockingServlet.executeRequest(BlockingServlet.java:324)
| at
com.icesoft.faces.webapp.xmlhttp.BlockingServlet.service(BlockingServlet.java:186)
| at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
| at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
| at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
| at
org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:393)
| 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.Http11Processor.process(Http11Processor.java:869)
| at
org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
| at
org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
| at
org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112)
| at java.lang.Thread.run(Thread.java:619)
|
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