[jbpm-issues] [JBoss JIRA] Updated: (JBPM-2529) jBPM-Spring Integration doesn't work for EvenListener-s

jBPM-Spring Integration doesn't work for EvenListener-s ------------------------------------------------------- Key: JBPM-2529 URL: https://jira.jboss.org/jira/browse/JBPM-2529 Project: jBPM Issue Type: Bug Security Level: Public(Everyone can see) Components: Runtime Engine Affects Versions: jBPM 4.1 Environment: jBPM 4.1, Java 6, JOTM, Spring 2.5.6, OSX Snow Leopard Reporter: Christian Bonami Assignee: Joram Barrez Fix For: jBPM 4.3 jBPM-Spring integration works for <custom /> activities (ActivityBehaviour, ExternalActivityBehaviour). But registration of EventListener-implementations with Spring doesn't work yet. Take a look: <?xml version="1.0" encoding="UTF-8"?> <process name="test" xmlns="http://jbpm.org/4.0/jpdl"> <start g="38,16,48,48" name="start"> <transition g="-25,-18" name="to a" to="a" /> </start> <state g="16,96,92,52" name="a"> <on event="start"> <event-listener expr="${simpleListener}" /> </on> <transition g="-46,-18" name="to service" to="service" /> </state> <custom name="service" g="16,180,92,52" expr="${executeServiceAndWaitState}"> <transition name="to end" to="end" g="-39,-18" /> </custom> <end g="38,264,48,48" name="end" /> </process> and @Component("simpleListener") public class SimpleListener implements EventListener{ private static final long serialVersionUID = -3904780616247094815L; @Override public void notify(EventListenerExecution execution) throws Exception { System.out.println(">>>>SimpleListener caught event - execution="+execution.getId()); } } @Component("executeServiceAndWaitState") public class ExecuteServiceAndWaitState implements ExternalActivityBehaviour { private static final long serialVersionUID = 5989768864384356423L; @Autowired private EchoService echoService; @Override public void execute(ActivityExecution execution) throws Exception { System.out.println(this.echoService.echo("ExecuteServiceAndWait.execute(..)")); execution.waitForSignal(); } @Override public void signal(ActivityExecution execution, String signalName, Map<String, ?> parameters) throws Exception { System.out.println(this.echoService.echo("ExecuteServiceAndWait.signal(..)")); } } When I omit the event definition from the jPDL and execute it, everything works as expected. However, when I leave it in, I get a NullPointerException: 9/8/09 6:56:09 PM (F) Jdk14Log.debug : executing activity(start) 9/8/09 6:56:09 PM (I) Jdk14Log.info : exception while executing command org.jbpm.pvm.internal.cmd.StartProcessInstanceInLatestCmd@2d34ab9b java.lang.NullPointerException at org.jbpm.pvm.internal.model.op.ExecuteEventListener.perform(ExecuteEventListener.java:81) 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.spring.CommandTransactionCallback.doInTransaction(CommandTransactionCallback.java:50) at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:128) at org.jbpm.pvm.internal.tx.SpringTransactionInterceptor.execute(SpringTransactionInterceptor.java:77) 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:66) at org.rjv.ambi.kas.process.FindExecutionTest.testFindExecutionById(FindExecutionTest.java:15) 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:168) at junit.framework.TestCase.runBare(TestCase.java:134) at org.springframework.test.ConditionalTestCase.runBare(ConditionalTestCase.java:76) at junit.framework.TestResult$1.protect(TestResult.java:110) at junit.framework.TestResult.runProtected(TestResult.java:128) at junit.framework.TestResult.run(TestResult.java:113) at junit.framework.TestCase.run(TestCase.java:124) at junit.framework.TestSuite.runTest(TestSuite.java:232) at junit.framework.TestSuite.run(TestSuite.java:227) 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) Note: I make use of the JOTM jtaTransactionmanager, and not the hibernateTransactionManager, but I don't think that this has nything to do with it. The code fails on line "eventListener.notify(execution);" in the following code snippet: ... public void perform(ExecutionImpl execution) { EventImpl event = execution.getEvent(); ObservableElementImpl observableElement = event.getObservableElement(); int eventListenerIndex = execution.getEventListenerIndex(); List<EventListenerReference> eventListenerReferences = event.getListenerReferences(); if ( (eventListenerReferences!=null) && (!eventListenerReferences.isEmpty()) ) { EventListenerReference eventListenerReference = eventListenerReferences.get(eventListenerIndex); ObservableElement eventSource = execution.getEventSource(); if ((eventSource == observableElement) || (eventListenerReference.isPropagationEnabled())) { EventListener eventListener = eventListenerReference.get(); log.trace("executing " + eventListener + " for " + event); try { // TODO can/should this invocation be unified with the exception handler invocation of the event notification method? eventListener.notify(execution); } catch (Exception e) { log.trace("exception during action: " + e); execution.handleException((ObservableElementImpl) observableElement, event, eventListenerReference, e, "couldn't run action " + eventListener); } } // increment the event listener index eventListenerIndex++; execution.setEventListenerIndex(eventListenerIndex); } ... There's a null-eventListener. I checked this with Andries Inze and he also thinks this is a bug.