4 Replies Latest reply on Dec 21, 2006 4:05 AM by Alberto Martinez

    Pageflow and @StartTask

    Alberto Martinez Newbie

      Hello.

      I am trying to start a task with @StartTask annotation but it seems not work because I am in a long running conversation.

      The problem is that I have a pageflow running and I call the @StartTask annotated method from a decision-node. With the pageflow I have a long conversation, so when it founds @StartTask returns a exception:


      JSF:

      <h:form>
       <h:dataTable var="task"
       value="#{taskInstanceListForType['esperandoEnvio']}"
       rendered="#{not empty taskInstanceListForType['esperandoEnvio']}">
      
       <h:column>
       <f:facet name="header">
       <h:outputText value="Título" />
       </f:facet>
       <h:outputText value="#{task.variables.peticionJBPM['url']}" />
       </h:column>
      
       <h:column>
       <s:button action="recibido" value="Recibido" taskInstance="#{task}" />
       </h:column>
      
       </h:dataTable>
      
      </h:form>
      



      Pageflow definition:
      ....
      
       <page name="Pedidos" back="enabled" view-id="/peticiones/pedidos.jsp" no-conversation-view-id="/peticiones/login.jsp">
       <redirect />
       <transition name="volver" to="Gestionar Peticiones"></transition>
       <transition name="ver" to="Informacion"></transition>
       <transition name="buscar" to="Resultados"></transition>
       <transition name="recibido" to="Recibido"></transition>
       </page>
      
       <decision name="Recibido" expression="#{avanzarEstadoPeticion.avanzar}">
       <transition name="false" to="Pedidos"></transition>
       <transition name="true" to="Pedidos"></transition>
       </decision>
      
      ....
      



      Bean:
      @Stateless
      @Name("avanzarEstadoPeticion")
      public class AvanzarEstadoPeticionImpl implements AvanzarEstadoPeticion {
      
       @StartTask
       @EndTask
       public boolean avanzar() {
       return true;
       }
      
      }
      



      And, finally, the stacktrace:
      17:28:59,225 ERROR [[Faces Servlet]] Servlet.service() for servlet Faces Servlet threw exception
      org.jbpm.graph.def.DelegationException
       at org.jbpm.graph.def.GraphElement.raiseException(GraphElement.java:352)
       at org.jbpm.graph.def.GraphElement.raiseException(GraphElement.java:346)
       at org.jbpm.graph.node.Decision.execute(Decision.java:131)
       at org.jbpm.graph.def.Node.enter(Node.java:316)
       at org.jbpm.graph.def.Transition.take(Transition.java:119)
       at org.jbpm.graph.def.Node.leave(Node.java:383)
       at org.jbpm.graph.exe.Token.signal(Token.java:174)
       at org.jbpm.graph.exe.Token.signal(Token.java:137)
       at org.jbpm.graph.exe.ProcessInstance.signal(ProcessInstance.java:229)
       at org.jboss.seam.pageflow.PageflowHelper.signal(PageflowHelper.java:47)
       at org.jboss.seam.core.Pageflow.navigate(Pageflow.java:214)
       at org.jboss.seam.jsf.SeamNavigationHandler.handleNavigation(SeamNavigationHandler.java:30)
       at org.jboss.seam.core.Pages.handleOutcome(Pages.java:319)
       at org.jboss.seam.core.Pages.callAction(Pages.java:360)
       at org.jboss.seam.jsf.AbstractSeamPhaseListener.callPageActions(AbstractSeamPhaseListener.java:200)
       at org.jboss.seam.jsf.AbstractSeamPhaseListener.beforeRender(AbstractSeamPhaseListener.java:149)
       at org.jboss.seam.jsf.SeamPhaseListener.beforePhase(SeamPhaseListener.java:50)
       at org.apache.myfaces.lifecycle.LifecycleImpl.informPhaseListenersBefore(LifecycleImpl.java:520)
       at org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:342)
       at javax.faces.webapp.FacesServlet.service(FacesServlet.java:107)
       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$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
       at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
       at org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112)
       at java.lang.Thread.run(Thread.java:595)
      Caused by: org.jbpm.JbpmException: couldn't evaluate expression '#{avanzarEstadoPeticion.avanzar}'
       at org.jbpm.jpdl.el.impl.JbpmExpressionEvaluator.evaluate(JbpmExpressionEvaluator.java:38)
       at org.jbpm.graph.node.Decision.execute(Decision.java:108)
       ... 35 more
      Caused by: javax.ejb.EJBException: java.lang.IllegalStateException: begin method invoked from a long running conversation, try using @Begin(join=true)
       at org.jboss.ejb3.tx.Ejb3TxPolicy.handleExceptionInOurTx(Ejb3TxPolicy.java:69)
       at org.jboss.aspects.tx.TxPolicy.invokeInOurTx(TxPolicy.java:83)
       at org.jboss.aspects.tx.TxInterceptor$Required.invoke(TxInterceptor.java:197)
       at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
       at org.jboss.aspects.tx.TxPropagationInterceptor.invoke(TxPropagationInterceptor.java:76)
       at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
       at org.jboss.ejb3.stateless.StatelessInstanceInterceptor.invoke(StatelessInstanceInterceptor.java:62)
       at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
       at org.jboss.aspects.security.AuthenticationInterceptor.invoke(AuthenticationInterceptor.java:78)
       at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
       at org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagationInterceptor.java:47)
       at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
       at org.jboss.ejb3.asynchronous.AsynchronousInterceptor.invoke(AsynchronousInterceptor.java:106)
       at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
       at org.jboss.ejb3.stateless.StatelessContainer.localInvoke(StatelessContainer.java:181)
       at org.jboss.ejb3.stateless.StatelessLocalProxy.invoke(StatelessLocalProxy.java:79)
       at $Proxy518.avanzar(Unknown Source)
       at org.fundacionctic.actions.peticion.AvanzarEstadoPeticion$$FastClassByCGLIB$$acb03afc.invoke(<generated>)
       at net.sf.cglib.proxy.MethodProxy.invoke(MethodProxy.java:149)
       at org.jboss.seam.intercept.RootInvocationContext.proceed(RootInvocationContext.java:45)
       at org.jboss.seam.intercept.ClientSideInterceptor$1.proceed(ClientSideInterceptor.java:69)
       at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:55)
       at org.jboss.seam.interceptors.ExceptionInterceptor.handleExceptions(ExceptionInterceptor.java:28)
       at sun.reflect.GeneratedMethodAccessor399.invoke(Unknown Source)
       at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
       at java.lang.reflect.Method.invoke(Method.java:585)
       at org.jboss.seam.util.Reflections.invoke(Reflections.java:18)
       at org.jboss.seam.intercept.Interceptor.aroundInvoke(Interceptor.java:169)
       at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:64)
       at org.jboss.seam.intercept.RootInterceptor.createSeamInvocationContext(RootInterceptor.java:144)
       at org.jboss.seam.intercept.RootInterceptor.invokeInContexts(RootInterceptor.java:129)
       at org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:102)
       at org.jboss.seam.intercept.ClientSideInterceptor.interceptInvocation(ClientSideInterceptor.java:78)
       at org.jboss.seam.intercept.ClientSideInterceptor.intercept(ClientSideInterceptor.java:47)
       at org.jboss.seam.intercept.Proxy$$EnhancerByCGLIB$$20d7a2c3.avanzar(<generated>)
       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.jbpm.jpdl.el.impl.BeanMethod.invoke(BeanMethod.java:19)
       at org.jbpm.jpdl.el.impl.ArraySuffix.evaluate(ArraySuffix.java:287)
       at org.jbpm.jpdl.el.impl.ComplexValue.evaluate(ComplexValue.java:146)
       at org.jbpm.jpdl.el.impl.ExpressionEvaluatorImpl.evaluate(ExpressionEvaluatorImpl.java:264)
       at org.jbpm.jpdl.el.impl.ExpressionEvaluatorImpl.evaluate(ExpressionEvaluatorImpl.java:191)
       at org.jbpm.jpdl.el.impl.JbpmExpressionEvaluator.evaluate(JbpmExpressionEvaluator.java:34)
       ... 36 more
      Caused by: java.lang.IllegalStateException: begin method invoked from a long running conversation, try using @Begin(join=true)
       at org.jboss.seam.interceptors.ConversationInterceptor.endOrBeginLongRunningConversation(ConversationInterceptor.java:46)
       at sun.reflect.GeneratedMethodAccessor401.invoke(Unknown Source)
       at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
       at java.lang.reflect.Method.invoke(Method.java:585)
       at org.jboss.seam.util.Reflections.invoke(Reflections.java:18)
       at org.jboss.seam.intercept.Interceptor.aroundInvoke(Interceptor.java:169)
       at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:64)
       at org.jboss.seam.interceptors.BusinessProcessInterceptor.manageBusinessProcessContext(BusinessProcessInterceptor.java:50)
       at sun.reflect.GeneratedMethodAccessor400.invoke(Unknown Source)
       at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
       at java.lang.reflect.Method.invoke(Method.java:585)
       at org.jboss.seam.util.Reflections.invoke(Reflections.java:18)
       at org.jboss.seam.intercept.Interceptor.aroundInvoke(Interceptor.java:169)
       at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:64)
       at org.jboss.seam.intercept.RootInterceptor.createSeamInvocationContext(RootInterceptor.java:144)
       at org.jboss.seam.intercept.RootInterceptor.invokeInContexts(RootInterceptor.java:129)
       at org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:102)
       at org.jboss.seam.intercept.SessionBeanInterceptor.aroundInvoke(SessionBeanInterceptor.java:49)
       at sun.reflect.GeneratedMethodAccessor413.invoke(Unknown Source)
       at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
       at java.lang.reflect.Method.invoke(Method.java:585)
       at org.jboss.ejb3.interceptor.InvocationContextImpl.proceed(InvocationContextImpl.java:118)
       at org.jboss.ejb3.interceptor.EJB3InterceptorsInterceptor.invoke(EJB3InterceptorsInterceptor.java:63)
       at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
       at org.jboss.ejb3.entity.TransactionScopedEntityManagerInterceptor.invoke(TransactionScopedEntityManagerInterceptor.java:54)
       at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
       at org.jboss.ejb3.AllowedOperationsInterceptor.invoke(AllowedOperationsInterceptor.java:47)
       at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
       at org.jboss.aspects.tx.TxPolicy.invokeInOurTx(TxPolicy.java:79)
       ... 79 more
      
      



      I have tryed with @Begin(join=true) in the bean method as suggests the exception, but it has not work.

      Any idea?

      Thanks.


        • 1. Re: Pageflow and @StartTask
          Gavin King Master

          You'll have to use the API.

          BusinessProcess.instance().resumeTask(taskId); //associate task with current conversation
          BusinessProcess.instance().startTask(); //call Task.start(actor.id)


          • 2. Re: Pageflow and @StartTask
            Alberto Martinez Newbie

            Hello.

            Thank you for the reply.

            If I follow this way... how can I get the taskId for resumeTask method?

            I have tried with:

            <h:column>
             <s:button action="recibido" value="Recibido" taskInstance="#{task}" />
            </h:column>
            


            and

            @Stateless
            @Name("avanzarEstadoPeticion")
            public class AvanzarEstadoPeticionImpl implements AvanzarEstadoPeticion {
             @In
             private TaskInstance taskInstance;
            
             /**
             * @see org.fundacionctic.actions.peticion.AvanzarEstadoPeticion#avanzar()
             */
             public boolean avanzar() {
             try {
             BusinessProcess.instance().resumeTask(taskInstance.getId());
             BusinessProcess.instance().startTask();
             return true;
             } catch (Exception e) {
             return false;
             }
             }
            
            }
            


            but it has not work:

            14:13:43,833 ERROR [[Faces Servlet]] Servlet.service() for servlet Faces Servlet threw exception
            org.jbpm.graph.def.DelegationException
             at org.jbpm.graph.def.GraphElement.raiseException(GraphElement.java:352)
             at org.jbpm.graph.def.GraphElement.raiseException(GraphElement.java:346)
             at org.jbpm.graph.node.Decision.execute(Decision.java:131)
             at org.jbpm.graph.def.Node.enter(Node.java:316)
             at org.jbpm.graph.def.Transition.take(Transition.java:119)
             at org.jbpm.graph.def.Node.leave(Node.java:383)
             at org.jbpm.graph.exe.Token.signal(Token.java:174)
             at org.jbpm.graph.exe.Token.signal(Token.java:137)
             at org.jbpm.graph.exe.ProcessInstance.signal(ProcessInstance.java:229)
             at org.jboss.seam.pageflow.PageflowHelper.signal(PageflowHelper.java:47)
             at org.jboss.seam.core.Pageflow.navigate(Pageflow.java:214)
             at org.jboss.seam.jsf.SeamNavigationHandler.handleNavigation(SeamNavigationHandler.java:30)
             at org.jboss.seam.core.Pages.handleOutcome(Pages.java:319)
             at org.jboss.seam.core.Pages.callAction(Pages.java:360)
             at org.jboss.seam.jsf.AbstractSeamPhaseListener.callPageActions(AbstractSeamPhaseListener.java:200)
             at org.jboss.seam.jsf.AbstractSeamPhaseListener.beforeRender(AbstractSeamPhaseListener.java:149)
             at org.jboss.seam.jsf.SeamPhaseListener.beforePhase(SeamPhaseListener.java:50)
             at org.apache.myfaces.lifecycle.LifecycleImpl.informPhaseListenersBefore(LifecycleImpl.java:520)
             at org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:342)
             at javax.faces.webapp.FacesServlet.service(FacesServlet.java:107)
             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$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
             at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
             at org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112)
             at java.lang.Thread.run(Thread.java:595)
            Caused by: org.jbpm.JbpmException: couldn't evaluate expression '#{avanzarEstadoPeticion.avanzar}'
             at org.jbpm.jpdl.el.impl.JbpmExpressionEvaluator.evaluate(JbpmExpressionEvaluator.java:38)
             at org.jbpm.graph.node.Decision.execute(Decision.java:108)
             ... 35 more
            Caused by: javax.ejb.EJBException: org.jboss.seam.RequiredException: In attribute requires value for component: avanzarEstadoPeticion.taskInstance
             at org.jboss.ejb3.tx.Ejb3TxPolicy.handleExceptionInOurTx(Ejb3TxPolicy.java:69)
             at org.jboss.aspects.tx.TxPolicy.invokeInOurTx(TxPolicy.java:83)
             at org.jboss.aspects.tx.TxInterceptor$Required.invoke(TxInterceptor.java:197)
             at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
             at org.jboss.aspects.tx.TxPropagationInterceptor.invoke(TxPropagationInterceptor.java:76)
             at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
             at org.jboss.ejb3.stateless.StatelessInstanceInterceptor.invoke(StatelessInstanceInterceptor.java:62)
             at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
             at org.jboss.aspects.security.AuthenticationInterceptor.invoke(AuthenticationInterceptor.java:78)
             at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
             at org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagationInterceptor.java:47)
             at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
             at org.jboss.ejb3.asynchronous.AsynchronousInterceptor.invoke(AsynchronousInterceptor.java:106)
             at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
             at org.jboss.ejb3.stateless.StatelessContainer.localInvoke(StatelessContainer.java:181)
             at org.jboss.ejb3.stateless.StatelessLocalProxy.invoke(StatelessLocalProxy.java:79)
             at $Proxy332.avanzar(Unknown Source)
             at org.fundacionctic.actions.peticion.AvanzarEstadoPeticion$$FastClassByCGLIB$$acb03afc.invoke(<generated>)
             at net.sf.cglib.proxy.MethodProxy.invoke(MethodProxy.java:149)
             at org.jboss.seam.intercept.RootInvocationContext.proceed(RootInvocationContext.java:45)
             at org.jboss.seam.intercept.ClientSideInterceptor$1.proceed(ClientSideInterceptor.java:69)
             at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:55)
             at org.jboss.seam.interceptors.ExceptionInterceptor.handleExceptions(ExceptionInterceptor.java:28)
             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.seam.util.Reflections.invoke(Reflections.java:18)
             at org.jboss.seam.intercept.Interceptor.aroundInvoke(Interceptor.java:169)
             at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:64)
             at org.jboss.seam.intercept.RootInterceptor.createSeamInvocationContext(RootInterceptor.java:144)
             at org.jboss.seam.intercept.RootInterceptor.invokeInContexts(RootInterceptor.java:129)
             at org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:102)
             at org.jboss.seam.intercept.ClientSideInterceptor.interceptInvocation(ClientSideInterceptor.java:78)
             at org.jboss.seam.intercept.ClientSideInterceptor.intercept(ClientSideInterceptor.java:47)
             at org.jboss.seam.intercept.Proxy$$EnhancerByCGLIB$$55bbded2.avanzar(<generated>)
             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.jbpm.jpdl.el.impl.BeanMethod.invoke(BeanMethod.java:19)
             at org.jbpm.jpdl.el.impl.ArraySuffix.evaluate(ArraySuffix.java:287)
             at org.jbpm.jpdl.el.impl.ComplexValue.evaluate(ComplexValue.java:146)
             at org.jbpm.jpdl.el.impl.ExpressionEvaluatorImpl.evaluate(ExpressionEvaluatorImpl.java:264)
             at org.jbpm.jpdl.el.impl.ExpressionEvaluatorImpl.evaluate(ExpressionEvaluatorImpl.java:191)
             at org.jbpm.jpdl.el.impl.JbpmExpressionEvaluator.evaluate(JbpmExpressionEvaluator.java:34)
             ... 36 more
            Caused by: org.jboss.seam.RequiredException: In attribute requires value for component: avanzarEstadoPeticion.taskInstance
             at org.jboss.seam.Component.getInstanceToInject(Component.java:1828)
             at org.jboss.seam.Component.injectFields(Component.java:1317)
             at org.jboss.seam.Component.inject(Component.java:1087)
             at org.jboss.seam.interceptors.BijectionInterceptor.bijectTargetComponent(BijectionInterceptor.java:48)
             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.seam.util.Reflections.invoke(Reflections.java:18)
             at org.jboss.seam.intercept.Interceptor.aroundInvoke(Interceptor.java:169)
             at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:64)
             at org.jboss.seam.interceptors.OutcomeInterceptor.interceptOutcome(OutcomeInterceptor.java:23)
             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.seam.util.Reflections.invoke(Reflections.java:18)
             at org.jboss.seam.intercept.Interceptor.aroundInvoke(Interceptor.java:169)
             at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:64)
             at org.jboss.seam.interceptors.ConversationInterceptor.endOrBeginLongRunningConversation(ConversationInterceptor.java:55)
             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.seam.util.Reflections.invoke(Reflections.java:18)
             at org.jboss.seam.intercept.Interceptor.aroundInvoke(Interceptor.java:169)
             at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:64)
             at org.jboss.seam.interceptors.BusinessProcessInterceptor.manageBusinessProcessContext(BusinessProcessInterceptor.java:50)
             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.seam.util.Reflections.invoke(Reflections.java:18)
             at org.jboss.seam.intercept.Interceptor.aroundInvoke(Interceptor.java:169)
             at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:64)
             at org.jboss.seam.intercept.RootInterceptor.createSeamInvocationContext(RootInterceptor.java:144)
             at org.jboss.seam.intercept.RootInterceptor.invokeInContexts(RootInterceptor.java:129)
             at org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:102)
             at org.jboss.seam.intercept.SessionBeanInterceptor.aroundInvoke(SessionBeanInterceptor.java:49)
             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.ejb3.interceptor.InvocationContextImpl.proceed(InvocationContextImpl.java:118)
             at org.jboss.ejb3.interceptor.EJB3InterceptorsInterceptor.invoke(EJB3InterceptorsInterceptor.java:63)
             at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
             at org.jboss.ejb3.entity.TransactionScopedEntityManagerInterceptor.invoke(TransactionScopedEntityManagerInterceptor.java:54)
             at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
             at org.jboss.ejb3.AllowedOperationsInterceptor.invoke(AllowedOperationsInterceptor.java:47)
             at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
             at org.jboss.aspects.tx.TxPolicy.invokeInOurTx(TxPolicy.java:79)
            
            


            I dont know how can I get taskId without injecting it from TaskInstace... am I loosing something?

            Thanks.

            • 3. Re: Pageflow and @StartTask
              Gavin King Master

              Um. You can get it anywhere you like?! A request parameter?

              • 4. Re: Pageflow and @StartTask
                Alberto Martinez Newbie

                Ok, it is working now.

                I was blind with injection and I couldn't see the easiest way.

                Thank you.