Dear community, I want to use jBPM inside of a servlet and i must serialize some variables to process instances. Currently i am using MySQL/Hinernate, JBoss-4.0.2 and JVM 1.5 and jbpm-3.0.2.
Well, as you know the web archive has an web/classes directory structure that must be used. My actions class do not have a classes.package name and that is confusing jbpm. ProcessClassLoader cannot find the actions classes inside the classes dir, but they are there. (???) A work arround (still some problems...) is to deploy another jar file with the action classes. That way, jbpm can find the classes and it works fine if i dont use the serialization. When i introduce some serializable variable to a process instance the process works fine until a new deployment. If a new redeploy is made i get a ClassCastException, complaining about the action classes. JBoss needs to shutdown fot the things to work again. This is a UnClassLoading issue i guess. STATUS OK [When not using serialization] The servlet retrieves the processdefinition from DB [OK] I can signal the instance and i can see the process go through nodes [OK] When i serialize a simple object (3 String fields class) to a process instance it only works until a new redeploy and then i get a ClassCastException. If i start jboss again it gets OK again, until a new redeploy. FILES: file.war (containing the servlet) file.jar (containing the actions classes (nodes)) Processdefinitoin.xml | <?xml version="1.0" encoding="UTF-8"?> | | <process-definition xmlns="http://jbpm.org/3/jpdl"; | xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"; | xsi:schemaLocation="http://jbpm.org/3/jpdl http://jbpm.org/xsd/jpdl-3.0.xsd"; | name="ChangeNumber"> | | <start-state name="start"> | <transition to="INIT" /> | </start-state> | | <node name="INIT"> | <action | class='pt.ptinovacao.ngin.scp.smpsat.jbpm.classes.CN_Init_State' /> | <transition to="SLRI" /> | </node> | | <node name="SLRI"> | <action | class='pt.ptinovacao.ngin.scp.smpsat.jbpm.classes.CN_SLRi' /> | <transition to="SLRE" /> | </node> | | <node name="SLRE"> | <action | class='pt.ptinovacao.ngin.scp.smpsat.jbpm.classes.CN_SLRe' /> | <transition to="SDPI" /> | | | </node> | | <node name="SDPI"> | <action | class='pt.ptinovacao.ngin.scp.smpsat.jbpm.classes.CN_SDPi' /> | <transition to="SDPE" /> | | </node> | | <node name="SDPE"> | <action | class='pt.ptinovacao.ngin.scp.smpsat.jbpm.classes.CN_SDPe' /> | <transition to="end1" /> | | </node> | | <end-state name="end1"></end-state> | | | | </process-definition> | | Serialization code | JbpmSession jbpmSession = jbpmSessionFactory.openJbpmSession(); | // ... and begin a transaction on the persistence session | jbpmSession.beginTransaction(); | | // Now we can query the database for the process definition that we | // deployed above. | ProcessDefinition processDefinition = jbpmSession.getGraphSession().findLatestProcessDefinition("ChangeNumber"); | | ProcessInstance pi = new ProcessInstance(processDefinition); | | System.out.println("[States]: " + pi.getProcessDefinition().getNodes()); | | ProcessWrapper pw = new ProcessWrapper(); | pw.setOne("Smint1"); | pw.setTwo("Smint2"); | pw.setThree("Smint3"); | | pi.getContextInstance().setVariable("pw", pw); | | pi.signal(); | System.out.println("[Process]: " + pi.getRootToken().getNode().getName()); | | Exception | 02:09:49,939 ERROR [[SAPAdaptor]] Servlet.service() for servlet SAPAdaptor threw exception | org.jbpm.graph.def.DelegationException | at org.jbpm.graph.def.GraphElement.raiseException(GraphElement.java:299) | at org.jbpm.graph.def.GraphElement.raiseException(GraphElement.java:293) | at org.jbpm.graph.def.Node.execute(Node.java:299) | at org.jbpm.graph.def.Node.enter(Node.java:284) | at org.jbpm.graph.def.Transition.take(Transition.java:92) | at org.jbpm.graph.def.Node.leave(Node.java:349) | at org.jbpm.graph.node.StartState.leave(StartState.java:73) | at org.jbpm.graph.exe.Token.signal(Token.java:127) | at org.jbpm.graph.exe.Token.signal(Token.java:92) | at org.jbpm.graph.exe.ProcessInstance.signal(ProcessInstance.java:201) | at pt.ptinovacao.ftp.sapa.adaptor.SAPAServlet.doPost(SAPAServlet.java:145) | at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) | 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.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:81) | 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.CustomPrincipalValve.invoke(CustomPrincipalValve.java:39) | at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:153) | at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:59) | at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126) | at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105) | 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:856) | at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:744) | 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:595) | Caused by: java.lang.ClassCastException: pt.ptinovacao.ngin.scp.smpsat.jbpm.classes.ProcessWrapper | at pt.ptinovacao.ngin.scp.smpsat.jbpm.classes.CN_Init_State.execute(CN_Init_State.java:37) | at org.jbpm.graph.def.Action.execute(Action.java:79) | at org.jbpm.graph.def.Node.execute(Node.java:295) | | Thanks Joshua View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3918547#3918547 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=3918547 ------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. 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