[jboss-user] [jBPM] - Kindly help me in passing processVariables when Human Task completed.

[Rajesh P]

Rajesh P [https://community.jboss.org/people/javalearner] created the discussion

"Kindly help me in passing processVariables when Human Task completed."

To view the discussion, visit: https://community.jboss.org/message/817191#817191

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Hi All,
Please some one give light on this problem. I am sstruggling to resolve this issue from last 2 days.

I am using JBPM 5.4.0 final with Spring 3.0 MVC and Hibernate 3. I followed the configuration given in

https://github.com/mswiderski/jbpm-examples/tree/master/jbpm-spring-web https://github.com/mswiderski/jbpm-examples/tree/master/jbpm-spring-web link.


Actually when i passing the values to processVariales while human task is going to completed, i am getting null values inside of the script task after the human task.(Please find the attached BPMN file).

The code i am using to complete the Human task is,

long taskId = unlockRequestVO.getRequestID();
humanTaskEngine.startTask(taskId,unlockRequestVO.getUser());
Map<String, Object> results = new HashMap<String,Object>();
                    results.put("muRequest",unlockRequestVO);
                    if(unlockRequestVO.getTaskStatus().equals("approve"))
                    results.put("isApproved",true);
                    else
                              results.put("isApproved", false);
humanTaskEngine.completeWithResults(taskId, user, results);

I have used the approach mentioned in the thread
https://community.jboss.org/thread/220416 https://community.jboss.org/thread/220416
But no use.



Please let me where am i doing wrong? :-/

Please let me know if any information is required.

java.lang.RuntimeException: Constraints must return boolean values: null for expression
          at org.jbpm.process.instance.impl.ReturnValueConstraintEvaluator.evaluate(ReturnValueConstraintEvaluator.java:136)
          at org.jbpm.workflow.instance.node.SplitInstance.internalTrigger(SplitInstance.java:72)
          at org.jbpm.workflow.instance.impl.NodeInstanceImpl.trigger(NodeInstanceImpl.java:126)
          at org.jbpm.workflow.instance.impl.NodeInstanceImpl.triggerNodeInstance(NodeInstanceImpl.java:279)
          at org.jbpm.workflow.instance.impl.NodeInstanceImpl.triggerCompleted(NodeInstanceImpl.java:238)
          at org.jbpm.workflow.instance.node.ActionNodeInstance.triggerCompleted(ActionNodeInstance.java:55)
          at org.jbpm.workflow.instance.node.ActionNodeInstance.internalTrigger(ActionNodeInstance.java:51)
          at org.jbpm.workflow.instance.impl.NodeInstanceImpl.trigger(NodeInstanceImpl.java:126)
          at org.jbpm.workflow.instance.impl.NodeInstanceImpl.triggerNodeInstance(NodeInstanceImpl.java:279)
          at org.jbpm.workflow.instance.impl.NodeInstanceImpl.triggerCompleted(NodeInstanceImpl.java:238)
          at org.jbpm.workflow.instance.impl.ExtendedNodeInstanceImpl.triggerCompleted(ExtendedNodeInstanceImpl.java:47)
          at org.jbpm.workflow.instance.node.StateBasedNodeInstance.triggerCompleted(StateBasedNodeInstance.java:216)
          at org.jbpm.workflow.instance.node.StateBasedNodeInstance.triggerCompleted(StateBasedNodeInstance.java:196)
          at org.jbpm.workflow.instance.node.WorkItemNodeInstance.triggerCompleted(WorkItemNodeInstance.java:247)
          at org.jbpm.workflow.instance.node.HumanTaskNodeInstance.triggerCompleted(HumanTaskNodeInstance.java:90)
          at org.jbpm.workflow.instance.node.WorkItemNodeInstance.workItemAborted(WorkItemNodeInstance.java:301)
          at org.jbpm.workflow.instance.node.WorkItemNodeInstance.signalEvent(WorkItemNodeInstance.java:287)
          at org.jbpm.workflow.instance.impl.WorkflowProcessInstanceImpl.signalEvent(WorkflowProcessInstanceImpl.java:342)
          at org.drools.persistence.jpa.processinstance.JPAWorkItemManager.abortWorkItem(JPAWorkItemManager.java:154)
          at org.drools.command.runtime.process.AbortWorkItemCommand.execute(AbortWorkItemCommand.java:56)
          at org.drools.command.runtime.process.AbortWorkItemCommand.execute(AbortWorkItemCommand.java:29)
          at org.drools.command.impl.DefaultCommandService.execute(DefaultCommandService.java:36)
          at org.drools.persistence.SingleSessionCommandService.execute(SingleSessionCommandService.java:373)
          at org.drools.command.impl.CommandBasedStatefulKnowledgeSession$1.abortWorkItem(CommandBasedStatefulKnowledgeSession.java:156)
          at org.jbpm.process.workitem.wsht.GenericHTWorkItemHandler$TaskCompletedHandler.handleCompletedTask(GenericHTWorkItemHandler.java:276)
          at org.jbpm.process.workitem.wsht.GenericHTWorkItemHandler$TaskCompletedHandler.execute(GenericHTWorkItemHandler.java:234)
          at org.jbpm.task.service.local.LocalTaskService$SimpleEventTransport.trigger(LocalTaskService.java:329)
          at org.jbpm.task.event.MessagingTaskEventListener.triggerPayload(MessagingTaskEventListener.java:76)
          at org.jbpm.task.event.MessagingTaskEventListener.handleEvent(MessagingTaskEventListener.java:92)
          at org.jbpm.task.event.MessagingTaskEventListener.taskCompleted(MessagingTaskEventListener.java:109)
          at org.jbpm.task.event.TaskEventSupport.fireTaskCompleted(TaskEventSupport.java:49)
          at org.jbpm.task.service.TaskServiceSession.postTaskCompleteOperation(TaskServiceSession.java:569)
          at org.jbpm.task.service.TaskServiceSession.taskOperation(TaskServiceSession.java:495)
          at org.jbpm.task.service.local.LocalTaskService.complete(LocalTaskService.java:83)
          at org.jbpm.task.service.local.LocalTaskService.completeWithResults(LocalTaskService.java:91)
          at com.honeywell.hses.workflow.WorkFlowService.approveOrReject(WorkFlowService.java:121)
          at com.honeywell.hses.workflow.WorkFlowService$$FastClassByCGLIB$$aec4f2ca.invoke(<generated>)
          at net.sf.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)
          at org.springframework.aop.framework.Cglib2AopProxy$CglibMethodInvocation.invokeJoinpoint(Cglib2AopProxy.java:689)
          at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)
          at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:110)
          at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
          at org.springframework.aop.framework.Cglib2AopProxy$DynamicAdvisedInterceptor.intercept(Cglib2AopProxy.java:622)
          at com.honeywell.hses.workflow.WorkFlowService$$EnhancerByCGLIB$$ec946839.approveOrReject(<generated>)
          at com.honeywell.hses.workflow.WorkFlowProvider.approveOrRejectRequest(WorkFlowProvider.java:42)
          at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
          at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
          at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
          at java.lang.reflect.Method.invoke(Unknown Source)
          at org.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:213)
          at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:126)
          at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:96)
          at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:617)
          at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:578)
          at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:80)
          at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:923)
          at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:852)
          at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:882)
          at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:789)
          at javax.servlet.http.HttpServlet.service(HttpServlet.java:647)
          at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
          at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
          at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
          at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)
          at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:118)
          at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:84)
          at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
          at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:113)
          at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
          at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:113)
          at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
          at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:54)
          at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
          at org.springframework.security.web.authentication.www.BasicAuthenticationFilter.doFilter(BasicAuthenticationFilter.java:150)
          at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
          at org.springframework.security.web.authentication.preauth.AbstractPreAuthenticatedProcessingFilter.doFilter(AbstractPreAuthenticatedProcessingFilter.java:88)
          at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
          at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:87)
          at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
          at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:192)
          at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:160)
          at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:346)
          at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:259)
          at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
          at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
          at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
          at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
          at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
          at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
          at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
          at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:936)
          at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
          at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
          at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1004)
          at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
          at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
          at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
          at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
          at java.lang.Thread.run(Unknown Source)
org.springframework.web.client.HttpServerErrorException: 500 Internal Server Error
          at org.springframework.web.client.DefaultResponseErrorHandler.handleError(DefaultResponseErrorHandler.java:92)
          at org.springframework.web.client.RestTemplate.handleResponseError(RestTemplate.java:494)
          at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:451)
          at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:409)
          at org.springframework.web.client.RestTemplate.exchange(RestTemplate.java:385)
          at com.honeywell.hses.controller.MetricController.getRestServiceResult(MetricController.java:363)
          at com.honeywell.hses.controller.MetricController.approveOrRejectRequest(MetricController.java:457)
          at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
          at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
          at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
          at java.lang.reflect.Method.invoke(Unknown Source)
          at org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:176)
          at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:436)
          at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:424)
          at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:923)
          at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:852)
          at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:882)
          at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:778)
          at javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
          at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
          at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
          at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
          at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
          at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
          at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
          at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
          at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
          at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:936)
          at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
          at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
          at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1004)
          at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
          at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
          at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
          at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
          at java.lang.Thread.run(Unknown Source)

Thanks in advance.

Rajesh,
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[Rajesh P]

Rajesh P [https://community.jboss.org/people/javalearner] created the discussion

"Re: Kindly help me in passing processVariables when Human Task completed."

To view the discussion, visit: https://community.jboss.org/message/817265#817265

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Please some one help me on this issue.
--------------------------------------------------------------

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[Shobhit Tyagi]

Shobhit Tyagi [https://community.jboss.org/people/roxy1987] created the discussion

"Re: Kindly help me in passing processVariables when Human Task completed."

To view the discussion, visit: https://community.jboss.org/message/817664#817664

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Rajesh,

What I do is, rather than using completeWithResults(), I complete the task and set the variables like following :


public void setProcessVariables(final long intProcessInstId, final Map<String, Object> hshVariableMap)
{
  StatefulKnowledgeSession objKSession = BpmRepositoryConfig.createSession(); //Get the session. 
  try {
   objKSession.execute(new GenericCommand<Map<String, Object>>() {
    public Map<String, Object> execute(Context objContext) {
           StatefulKnowledgeSession objKSession = ((KnowledgeCommandContext) objContext).
                      getStatefulKnowledgesession();
           org.jbpm.process.instance.ProcessInstance objProcessInstance = (org.jbpm.process.instance.
                           ProcessInstance) objKSession.
                           getProcessInstance(intProcessInstId);
           VariableScopeInstance objVariableScope = (VariableScopeInstance) objProcessInstance.
                       getContextInstance(VariableScope.VARIABLE_SCOPE);
           Iterator<Map.Entry<String, Object>> objIterator = hshVariableMap.entrySet().iterator();
           while(objIterator.hasNext()) {
            Map.Entry<String, Object> objPairs = (Map.Entry<String, Object>)objIterator.next();
            objVariableScope.setVariable(objPairs.getKey(), objPairs.getValue());
           }
           return null;
       }
   });
  } catch(Exception objException) {
   objLogger.loggerError(objException);
  }
}
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[Rajesh P]

Rajesh P [https://community.jboss.org/people/javalearner] created the discussion

"Re: Kindly help me in passing processVariables when Human Task completed."

To view the discussion, visit: https://community.jboss.org/message/817765#817765

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Thanks a lot Shobhit Tyagi for your answer.

I resolved this issue by implementing own LocalHTHandler as suggested in the below link
https://community.jboss.org/thread/218281?start=0&tstart=0 https://community.jboss.org/thread/218281?start=0&tstart=0.

Once again thank you very much Shobhit Tyagi. I will try your approach too.


Thanks,
Rajesh.
--------------------------------------------------------------

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