8:05 a.m.
Anup Nair [http://community.jboss.org/people/wrecked] created the discussion
"Hibernate LazyInitializationException during swimlane creation"
To view the discussion, visit: http://community.jboss.org/message/566066#566066
--------------------------------------------------------------
Hi All,
I am a new bie to this site. I am currently using jBPM 4 with Oracle as db.
I have created a sample workflow and using the JBPM API to create instances and moving
instance from one activity to another.
However when i am trying to create a swimlane programatically i am getting
*org.hibernate.LazyInitializationException*
*I am not getting an idea how the hibernate session gets closed.
*
Following is the code snippet for swimlane creation:
public void testAddParticipants() throws Exception{
ProcessInstance processInstance =
executionService.findProcessInstanceById("ServiceCenter.1");
EnvironmentImpl environment
=(EnvironmentImpl)((EnvironmentFactory)processService).openEnvironment();
try{
Collection<? extends Execution> executionMap =
processInstance.getExecutions();
for (Execution execution : executionMap) {
System.out.println(execution.getClass());
if(execution instanceof ExecutionImpl){
final ExecutionImpl exec = (ExecutionImpl) execution;
SwimlaneImpl role = exec.createSwimlane("approver");
System.out.println("Approver role added:"+role);
}
}
}finally{
environment.close();
}
}
The exception trace is:
### EXCEPTION ###########################################
[*LazyInitializationException] failed to lazily initialize a collection of role:
org.jbpm.pvm.internal.model.ExecutionImpl.swimlanes, no session or session was closed
org.hibernate.LazyInitializationException: failed to lazily initialize a collection of
role: org.jbpm.pvm.internal.model.ExecutionImpl.swimlanes, no session or session was
closed*
at
org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationException(AbstractPersistentCollection.java:380)
at
org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationExceptionIfNotConnected(AbstractPersistentCollection.java:372)
at
org.hibernate.collection.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:365)
at org.hibernate.collection.PersistentMap.put(PersistentMap.java:184)
at org.jbpm.pvm.internal.model.ExecutionImpl.createSwimlane(ExecutionImpl.java:874)
at com.jpmc.servicecenter.ServiceCenter.testAddParticipants(ServiceCenter.java:304)
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 junit.framework.TestCase.runTest(TestCase.java:164)
at junit.framework.TestCase.runBare(TestCase.java:130)
at junit.framework.TestResult$1.protect(TestResult.java:106)
at junit.framework.TestResult.runProtected(TestResult.java:124)
at junit.framework.TestResult.run(TestResult.java:109)
at junit.framework.TestCase.run(TestCase.java:120)
at
org.eclipse.jdt.internal.junit.runner.junit3.JUnit3TestReference.run(JUnit3TestReference.java:130)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
The jbpm.cfg.xml has the following configuration:
*<?xml version="1.0" encoding="UTF-8"?>*
**
*<jbpm-configuration>*
**
* <import resource="jbpm.default.cfg.xml" />
<import resource="jbpm.businesscalendar.cfg.xml" />
<import resource="jbpm.tx.hibernate.cfg.xml" />
<import resource="jbpm.jpdl.cfg.xml" />
<import resource="jbpm.bpmn.cfg.xml" />
<import resource="jbpm.identity.cfg.xml" />
<import resource="jbpm.task.hbm.xml" />*
**
* <!-- Job executor is excluded for running the example test cases. -->
<!-- To enable timers and messages in production use, this should be included.
-->
<!--
<import resource="jbpm.jobexecutor.cfg.xml" />
-->*
**
*</jbpm-configuration>*
I am stuck with this error from the past 1 week.
please help me out.
Thanks in advance.
--------------------------------------------------------------
Reply to this message by going to Community
[http://community.jboss.org/message/566066#566066]
Start a new discussion in jBPM at Community
[http://community.jboss.org/choose-container!input.jspa?contentType=1&...]
1:24 p.m.
New subject: [jBPM] - Re: Hibernate LazyInitializationException during swimlane creation
Michael Wohlfart [http://community.jboss.org/people/mwohlf] created the discussion
"Re: Hibernate LazyInitializationException during swimlane creation"
To view the discussion, visit: http://community.jboss.org/message/566130#566130
--------------------------------------------------------------
The hibernate session is managed the way you configure it with
<hibernate-session-factory /> or <hibernate-session />, the config for this is
probably in your jbpm.tx.hibernate.cfg.xml file.
Did you try using a command like described by HuiSheng in this thread:
http://community.jboss.org/message/536708#536708 http://community.jboss.org/message/536708
?
--------------------------------------------------------------
Reply to this message by going to Community
[http://community.jboss.org/message/566130#566130]
Start a new discussion in jBPM at Community
[http://community.jboss.org/choose-container!input.jspa?contentType=1&...]
3:32 a.m.
New subject: [jBPM] - Re: Hibernate LazyInitializationException during swimlane creation
Anup Nair [http://community.jboss.org/people/wrecked] created the discussion
"Re: Hibernate LazyInitializationException during swimlane creation"
To view the discussion, visit: http://community.jboss.org/message/566196#566196
--------------------------------------------------------------
Hi Micheal,
I tried using the command as described above.
Here is my code snippet:
final ProcessInstance processInstance =
executionService.findProcessInstanceById("ServiceCenter.1");
EnvironmentImpl environment
=(EnvironmentImpl)((EnvironmentFactory)processService).openEnvironment();
try{
processService.execute(new Command() {
public Object execute(Environment environment)
throws Exception {
Session session = environment.get(Session.class);
Transaction tx = session.beginTransaction();
SwimlaneImpl role =
((ExecutionImpl)processInstance).createSwimlane("approver");
session.update(processInstance);
tx.commit();
System.out.println("Approver role added:"+role);
return role;
}
});
}finally{
environment.close();
}
The ExecutionImpl class has swimlanes map to which this newly created swimlane is
inserted. However the map is not lazily getting initialized since the session gets closed
somehow.
My jbpm.tx.hibernate.cfg.xml has following configuration:
*<?xml version="1.0" encoding="UTF-8"?>*
*<jbpm-configuration>*
* <process-engine-context>*
* <command-service name="txRequiredCommandService">
<skip-interceptor />
<retry-interceptor />
<environment-interceptor />
<standard-transaction-interceptor />
</command-service>*
* <command-service name="newTxRequiredCommandService">
<retry-interceptor />
<environment-interceptor policy="requiresNew" />
<standard-transaction-interceptor />
</command-service>*
* <hibernate-configuration>
<cfg resource="jbpm.hibernate.cfg.xml" />
</hibernate-configuration>*
* <hibernate-session-factory />
</process-engine-context>*
* <transaction-context>
<transaction />
<hibernate-session />
</transaction-context>*
Please tell me is there anything else to be added to this configuration.
Thakns in advance.
--------------------------------------------------------------
Reply to this message by going to Community
[http://community.jboss.org/message/566196#566196]
Start a new discussion in jBPM at Community
[http://community.jboss.org/choose-container!input.jspa?contentType=1&...]
5200
days inactive
5201
days old
2 comments
2 participants
participants (2)
-
Anup Nair -
Michael Wohlfart