error for jbpm webservice method
forjbpm Apr 3, 2006 4:42 PMHi all,
I am trying to develop a webservice for jbpm. In this case I am using stateless session EJB and I have exposed it as a webservice .
EJB has business method -> processDefinitionNames()
Which is a very basic method (not at all fancy! Just returns the String of all processDefinitions())
public String processDefinitionNames() { // TODO Auto-generated method stub String processDefinitionNames = "ECSPUT\n"; JbpmContext jbpmContext = JbpmContext.getCurrentJbpmContext(); java.util.List processDefinitions = jbpmContext.getGraphSession().findAllProcessDefinitions(); if (processDefinitions.isEmpty() == false) { java.util.ListIterator listProcessDefinitions = processDefinitions .listIterator(); while (listProcessDefinitions.hasNext()) { ProcessDefinition processDefinition = (ProcessDefinition) listProcessDefinitions .next(); processDefinitionNames = processDefinitionNames + processDefinition.getName() + "\n"; } } return processDefinitionNames; }
However for jbpmContext.getGraphSession().findAllProcessDefinitions();
I get following error when I try to use processDefinitionNames() method in my SOAP client
14:37:58,187 ERROR [ServerEngine] Server error: AxisFault faultCode: {http://schemas.xmlsoap.org/soap/envelope/}Client faultSubcode: faultString: RuntimeException; nested exception is: java.lang.NullPointerException faultActor: faultNode: faultDetail: {http://xml.apache.org/axis/}stackTrace: java.rmi.ServerException: RuntimeException; nested exception is: java.lang.NullPointerException at org.jboss.ejb.plugins.LogInterceptor.handleException(LogInterceptor.java:400) at org.jboss.ejb.plugins.LogInterceptor.invoke(LogInterceptor.java:210) at org.jboss.ejb.plugins.ProxyFactoryFinderInterceptor.invoke(ProxyFactoryFinderInterceptor.java:136) at org.jboss.ejb.SessionContainer.internalInvoke(SessionContainer.java:643) at org.jboss.ejb.Container.invoke(Container.java:917) 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:585) at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155) at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94) at org.jboss.mx.server.Invocation.invoke(Invocation.java:86) at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:260) at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659) at org.jboss.webservice.server.InvokerProviderEJB.invokeServiceEndpoint(InvokerProviderEJB.java:144) at org.jboss.webservice.server.InvokerProvider.invokeMethod(InvokerProvider.java:327) at org.jboss.axis.providers.java.RPCProvider.invokeTarget(RPCProvider.java:176) at org.jboss.axis.providers.java.RPCProvider.processMessage(RPCProvider.java:121) at org.jboss.axis.providers.java.JavaProvider.invoke(JavaProvider.java:358) at org.jboss.axis.strategies.InvocationStrategy.visit(InvocationStrategy.java:73) at org.jboss.axis.SimpleChain.doVisiting(SimpleChain.java:160) at org.jboss.axis.SimpleChain.invoke(SimpleChain.java:123) at org.jboss.axis.handlers.soap.SOAPService.invoke(SOAPService.java:560) at org.jboss.webservice.server.ServerEngine.invokeInternal(ServerEngine.java:215) at org.jboss.webservice.server.ServerEngine.invoke(ServerEngine.java:104) at org.jboss.axis.transport.http.AxisServlet.doPost(AxisServlet.java:911) at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) at org.jboss.axis.transport.http.AxisServletBase.service(AxisServletBase.java:370) 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.CustomPrincipalValve.invoke(CustomPrincipalValve.java:54) at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:174) 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:868) at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:663) at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527) at org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112) at java.lang.Thread.run(Thread.java:595) Caused by: java.lang.NullPointerException at com.exegenix.ExegenixWork1Bean.processDefinitionNames(ExegenixWork1Bean.java:111) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:585) at org.jboss.invocation.Invocation.performCall(Invocation.java:359) at org.jboss.ejb.StatelessSessionContainer$ContainerInterceptor.invoke(StatelessSessionContainer.java:228) at org.jboss.resource.connectionmanager.CachedConnectionInterceptor.invoke(CachedConnectionInterceptor.java:158) at org.jboss.ejb.plugins.StatelessSessionInstanceInterceptor.invoke(StatelessSessionInstanceInterceptor.java:169) at org.jboss.webservice.server.ServiceEndpointInterceptor.invoke(ServiceEndpointInterceptor.java:126) at org.jboss.ejb.plugins.CallValidationInterceptor.invoke(CallValidationInterceptor.java:63) at org.jboss.ejb.plugins.AbstractTxInterceptor.invokeNext(AbstractTxInterceptor.java:121) at org.jboss.ejb.plugins.TxInterceptorCMT.runWithTransactions(TxInterceptorCMT.java:350) at org.jboss.ejb.plugins.TxInterceptorCMT.invoke(TxInterceptorCMT.java:181) at org.jboss.ejb.plugins.SecurityInterceptor.invoke(SecurityInterceptor.java:168) at org.jboss.ejb.plugins.LogInterceptor.invoke(LogInterceptor.java:206) ... 46 more
Can any one suggest me something?
Thanks and Regards