java activity argument problem

[nuvole]

Hi, all~!
I'm using jbpm4-beta2 version and jpdl java activity.
but i don't know how java activity invoke method with Object type argument.

<?xml version="1.0" encoding="UTF-8"?>

<process name="Java" xmlns="http://jbpm.org/4.0/jpdl">

 <start g="20,20,48,48">
 <transition name="" to="invoke java method"/>
 </start>

 <java class="com.xener.jbpm.JohnDoe" g="96,16,127,52" method="hello" name="invoke java method" var="answer">

 <field name="state"><string value="fine"/></field>
 <field name="session"><env type="org.hibernate.Session"/></field>

 <arg>
 <object class="com.xener.jbpm.JohnDoeMsg">
 <field name="msg"><string value="#{msgObject}"/></field>
 </object>
 </arg>

 <transition name="" to="wait"/>

 </java>

 <state g="255,16,88,52" name="wait"/>

</process>

Thanks for any help~!

[nuvole]

"nuvole" wrote:
Hi, all~!
I'm using jbpm4-beta2 version and jpdl java activity.
but i don't know how java activity invoke method with Object type argument.

<?xml version="1.0" encoding="UTF-8"?>

<process name="Java" xmlns="http://jbpm.org/4.0/jpdl">

 <start g="20,20,48,48">
 <transition name="" to="invoke java method"/>
 </start>

 <java class="com.xener.jbpm.JohnDoe" g="96,16,127,52" method="hello" name="invoke java method" var="answer">

 <field name="state"><string value="fine"/></field>
 <field name="session"><env type="org.hibernate.Session"/></field>

 <arg>
 <object class="com.xener.jbpm.JohnDoeMsg">
 <field name="msg"><string value="#{msgObject}"/></field>
 </object>
 </arg>

 <transition name="" to="wait"/>

 </java>

 <state g="255,16,88,52" name="wait"/>

</process>

but this error occured:

16:38:12,187 ERROR [STDERR] org.hibernate.HibernateException: instance not of expected entity type:
org.jbpm.pvm.internal.type.variable.UnpersistableVariable is not a: org.jbpm.pvm.internal.type.Vari
ble
 at org.hibernate.persister.entity.AbstractEntityPersister.getSubclassEntityPersister(Abstra
tEntityPersister.java:3663)
 at org.hibernate.impl.SessionImpl.getEntityPersister(SessionImpl.java:1374)
 at org.hibernate.engine.ForeignKeys.isTransient(ForeignKeys.java:203)
 at org.hibernate.event.def.AbstractSaveEventListener.getEntityState(AbstractSaveEventListen
r.java:535)
 at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.performSaveOrUpdate(DefaultSave
rUpdateEventListener.java:103)
 at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpd
teEventListener.java:93)
 at org.hibernate.impl.SessionImpl.fireSaveOrUpdate(SessionImpl.java:534)
 at org.hibernate.impl.SessionImpl.saveOrUpdate(SessionImpl.java:526)
 at org.hibernate.engine.CascadingAction$5.cascade(CascadingAction.java:241)
 at org.hibernate.engine.Cascade.cascadeToOne(Cascade.java:291)
 at org.hibernate.engine.Cascade.cascadeAssociation(Cascade.java:239)
 at org.hibernate.engine.Cascade.cascadeProperty(Cascade.java:192)
 at org.hibernate.engine.Cascade.cascadeCollectionElements(Cascade.java:319)
 at org.hibernate.engine.Cascade.cascadeCollection(Cascade.java:265)
 at org.hibernate.engine.Cascade.cascadeAssociation(Cascade.java:242)
 at org.hibernate.engine.Cascade.cascadeProperty(Cascade.java:192)
 at org.hibernate.engine.Cascade.cascade(Cascade.java:153)
 at org.hibernate.event.def.AbstractFlushingEventListener.cascadeOnFlush(AbstractFlushingEve
tListener.java:154)
 at org.hibernate.event.def.AbstractFlushingEventListener.prepareEntityFlushes(AbstractFlush
ngEventListener.java:145)
 at org.hibernate.event.def.AbstractFlushingEventListener.flushEverythingToExecutions(Abstra
tFlushingEventListener.java:88)
 at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java
49)
 at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1027)
 at org.jbpm.pvm.internal.tx.HibernateSessionResource.prepare(HibernateSessionResource.java:
4)
 at org.jbpm.pvm.internal.tx.StandardTransaction.commit(StandardTransaction.java:106)
 at org.jbpm.pvm.internal.tx.StandardTransaction.complete(StandardTransaction.java:65)
 at org.jbpm.pvm.internal.tx.StandardTransactionInterceptor.execute(StandardTransactionInter
eptor.java:61)
 at org.jbpm.pvm.internal.svc.EnvironmentInterceptor.execute(EnvironmentInterceptor.java:54)
 at org.jbpm.pvm.internal.svc.RetryInterceptor.execute(RetryInterceptor.java:55)
 at org.jbpm.pvm.internal.svc.ExecutionServiceImpl.startProcessInstanceByKey(ExecutionServic
Impl.java:72)
 at com.xener.jbpm.JavaInstantiateTest.testJavaInstantiate(JavaInstantiateTest.java:65)
 at com.xener.jbpm.web.JBPMServlet.doGet(JBPMServlet.java:23)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.
ava:290)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206

 at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.
ava:235)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206

 at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:235)
 at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
 at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.j
va:190)
 at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:92)
 at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.process(SecurityContextE
tablishmentValve.java:126)
 at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.invoke(SecurityContextEs
ablishmentValve.java:70)
 at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
 at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
 at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java
158)
 at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
 at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:330)
 at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:829)
 at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.j
va:601)
 at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
 at java.lang.Thread.run(Thread.java:619)

Thanks for any help~!

[jokum]

In case you still got the problem. I also had this error due to the fact the Object I was adding as a variable was not Serializable.

Implementing java.io.Serializable should fix this error.

Greetz