Help on Exception Handlers
Hi,
Iam new to JBPM and iam trying to test Exception Handling in jBPM.I didnt find any Examples on Exception Handling. So i have tried like this from previous forums and docs.
<node name="node1"> <transition name="" to="end1"></transition> <exception-handler> <action class="com.iton.classes.MyExceptionHandler"></action> </exception-handler> <action class="com.iton.classes.NodeAction"></action> </node>
Actually..I dont know how to write this class and what should it contain.
But i have written like :
public class MyExceptionHandler extends ExceptionHandler{
public MyExceptionHandler(){
System.out.println("In MyExceptionHandler");
}
}
I got the below exception :
15:55:45,500 INFO [STDOUT] In MyExceptionHandler 15:55:45,500 ERROR [[TestServlet]] Servlet.service() for servlet TestServlet threw exception org.jbpm.graph.def.DelegationException: com.iton.classes.MyExceptionHandler at org.jbpm.graph.def.GraphElement.raiseException(GraphElement.java:367) at org.jbpm.graph.def.GraphElement.raiseException(GraphElement.java:358) at org.jbpm.graph.def.Node.execute(Node.java:343) at org.jbpm.graph.def.Node.enter(Node.java:318) at org.jbpm.graph.def.Transition.take(Transition.java:151) at org.jbpm.graph.def.Node.leave(Node.java:393) at org.jbpm.graph.node.StartState.leave(StartState.java:70) at org.jbpm.graph.exe.Token.signal(Token.java:194) at org.jbpm.graph.exe.Token.signal(Token.java:139) at com.iton.servlets.TestServlet.doGet(TestServlet.java:32) at javax.servlet.http.HttpServlet.service(HttpServlet.java:697) 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: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.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:595) Caused by: java.lang.ClassCastException: com.iton.classes.MyExceptionHandler at org.jbpm.graph.def.Action.execute(Action.java:121) at org.jbpm.graph.def.ExceptionHandler.handleException(ExceptionHandler.java:60) at org.jbpm.graph.def.GraphElement.raiseException(GraphElement.java:343)
Please some one help me to write the handling class properly.
Thanks in advance..
