[jboss-user] [jBPM] - error on serialization object

[r ana]

r ana [http://community.jboss.org/people/amy3k] created the discussion

"error on serialization object"

To view the discussion, visit: http://community.jboss.org/message/540711#540711

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hello,

i new to jbpm and i have a little (but for me is big and urgent problem)

i have 2 web service - one is for "core"(WScomponents) and the second one is for creating a JBPM workflow(WSprincipal) that manage an application

in WS principal i appeal one method from WScomponents that return a list of a custom object named "folder" (=> List<folder>), this list i've tried to put this in a jbpm variable like this:

<java g="270,290,92,52" method="getAllFolders" name="getAllFolders" *var="folders"*>
      <arg><object expr="#{pathID}"/></arg>
      <arg><object expr="#{username}"/></arg>
      <transition g="-62,-35" name="to preluareVar" to="preluareVar"/>
 </java>

but in the method getAllFolders i've get an error like this:

*org.jbpm.pvm.internal.wire.WireException: couldn't invoke method getAllFolders: couldn't serialize '[wscomponents.Folder at 129e910]'*
        at org.jbpm.jpdl.internal.activity.JavaActivity.perform(JavaActivity.java:97)
        at org.jbpm.jpdl.internal.activity.JpdlAutomaticActivity.execute(JpdlAutomaticActivity.java:15)
        at org.jbpm.pvm.internal.model.op.ExecuteActivity.perform(ExecuteActivity.java:60)
        at org.jbpm.pvm.internal.model.ExecutionImpl.performAtomicOperationSync(ExecutionImpl.java:637)
        at org.jbpm.pvm.internal.model.ExecutionImpl.performAtomicOperation(ExecutionImpl.java:597)
        at org.jbpm.pvm.internal.model.ExecutionImpl.start(ExecutionImpl.java:201)
        at org.jbpm.pvm.internal.cmd.StartProcessInstanceInLatestCmd.execute(StartProcessInstanceInLatestCmd.java:65)
        at org.jbpm.pvm.internal.cmd.StartProcessInstanceInLatestCmd.execute(StartProcessInstanceInLatestCmd.java:38)
        at org.jbpm.pvm.internal.svc.DefaultCommandService.execute(DefaultCommandService.java:42)
        at org.jbpm.pvm.internal.tx.StandardTransactionInterceptor.execute(StandardTransactionInterceptor.java:54)
        at org.jbpm.pvm.internal.svc.EnvironmentInterceptor.execute(EnvironmentInterceptor.java:46)
        at org.jbpm.pvm.internal.svc.RetryInterceptor.execute(RetryInterceptor.java:55)
        at org.jbpm.pvm.internal.svc.ExecutionServiceImpl.startProcessInstanceByKey(ExecutionServiceImpl.java:78)
        at workflow.PrincipalProcess.start(PrincipalProcess.java:57)
        at workflow.principalWS.launch(principalWS.java:22)  .....and more


any help/suggestion is appreciated!!
10x,
a.

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