Jozef Chocholáček [https://community.jboss.org/people/jchocholacek] created the discussion "Output mapping from Human Task does not work" To view the discussion, visit: https://community.jboss.org/message/800540#800540 -------------------------------------------------------------- Hello there, I have a problem with mapping the Human Task output to process variables. My code is inspired by the https://community.jboss.org/people/bpmn2user/blog/2011/09/21/jbpm5-web-ex... https://community.jboss.org/people/bpmn2user/blog/2011/09/21/jbpm5-web-ex... blog post. I run it in Tomcat 6, using the Mina HT service. Here is my process definition: <?xml version="1.0" encoding="UTF-8"?> <definitions id="Definition"              targetNamespace="http://www.jboss.org/drools"              typeLanguage="http://www.java.com/javaTypes"              expressionLanguage="http://www.mvel.org/2.0"              xmlns="http://www.omg.org/spec/BPMN/20100524/MODEL"              xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"              xsi:schemaLocation="http://www.omg.org/spec/BPMN/20100524/MODEL BPMN20.xsd"              xmlns:g="http://www.jboss.org/drools/flow/gpd"              xmlns:bpmndi="http://www.omg.org/spec/BPMN/20100524/DI"              xmlns:dc="http://www.omg.org/spec/DD/20100524/DC"              xmlns:di="http://www.omg.org/spec/DD/20100524/DI"              xmlns:tns="http://www.jboss.org/drools">   <itemDefinition id="_mgnlDataItem" structureRef="java.util.Map" />   <itemDefinition id="_9-mgnlDataItem" structureRef="java.util.Map" />   <process processType="Private" isExecutable="true" id="jch.workflow.test" name="Flow Test" tns:packageName="defaultPackage" >     <extensionElements>      <tns:import name="java.util.Map" />     </extensionElements>     <!-- process variables -->     <property id="mgnlData" itemSubjectRef="_mgnlDataItem"/>     <!-- nodes -->     <startEvent id="_1" name="StartProcess" />     <endEvent id="_6" name="End" >         <terminateEventDefinition/>     </endEvent>     <scriptTask id="_7" name="Entry Script" scriptFormat="http://www.java.com/java" >       <script>String processId = "" + kcontext.getProcessInstance().getId(); System.out.println("ENTRY SCRIPT: " + processId); Map data = (Map) kcontext.getVariable("mgnlData"); if (data==null) {   System.out.println("Empty DATA"); } else {   System.out.println("DATA: " + data.toString()); } </script>     </scriptTask>     <scriptTask id="_8" name="Exit Script" scriptFormat="http://www.java.com/java" >       <script>String processId = "" + kcontext.getProcessInstance().getId(); System.out.println("EXIT SCRIPT: " + processId); Map data = (Map) kcontext.getVariable("mgnlData"); if (data==null) {   System.out.println("Empty DATA"); } else {   System.out.println("DATA: " + data.toString()); } </script>     </scriptTask>     <userTask id="_9" name="User Task" >       <extensionElements>         <tns:onEntry-script scriptFormat="http://www.java.com/java">           <script>System.out.println("Human Task - Entry action");</script>         </tns:onEntry-script>         <tns:onExit-script scriptFormat="http://www.java.com/java">           <script>System.out.println("Human Task - Exit action");</script>         </tns:onExit-script>       </extensionElements>       <ioSpecification>         <dataInput id="_9_ContentInput" name="Content" />         <dataOutput id="_9_mgnlDataOutput" name="mgnlData" />         <inputSet>           <dataInputRefs>_9_ContentInput</dataInputRefs>         </inputSet>         <outputSet>           <dataOutputRefs>_9_mgnlDataOutput</dataOutputRefs>         </outputSet>       </ioSpecification>       <dataInputAssociation>         <sourceRef>mgnlData</sourceRef>         <targetRef>_9_ContentInput</targetRef>       </dataInputAssociation>       <dataOutputAssociation>         <sourceRef>_9_mgnlDataOutput</sourceRef>         <targetRef>mgnlData</targetRef>       </dataOutputAssociation>       <potentialOwner>         <resourceAssignmentExpression>           <formalExpression>peter</formalExpression>         </resourceAssignmentExpression>       </potentialOwner>     </userTask>     <!-- connections -->     <sequenceFlow id="_8-_6" sourceRef="_8" targetRef="_6" />     <sequenceFlow id="_1-_7" sourceRef="_1" targetRef="_7" />     <sequenceFlow id="_9-_8" sourceRef="_9" targetRef="_8" />     <sequenceFlow id="_7-_9" sourceRef="_7" targetRef="_9" />   </process>   <bpmndi:BPMNDiagram>     ...   </bpmndi:BPMNDiagram> </definitions> This is how I start the process:     public RunningProcess launch(Workflow workflow, Map<String, Object> parameters) throws WorkflowException {         Map<String,Object> processParams = new HashMap<String,Object>();         processParams.put(RunningProcess.DATA, parameters);         try {             // start user transaction             UserTransaction ut = (UserTransaction) new InitialContext().lookup("java:comp/UserTransaction");             ut.begin();             // start process             ProcessInstance pi = this.ksession.startProcess(workflow.getId(), processParams);             this.ksession.fireAllRules();             // commit             ut.commit();             return new ProcessImpl(pi);         } catch (Exception e) {             log.debug("Error starting workflow [" + workflow.getId() + "].", e);             throw new WorkflowException("Error starting workflow.", e);         }     } RunningProcess.DATA containg the "mgnlData" string, Workflow is my bean holding the process definition data, RunningProcess / ProcessImpl are my wrappers for the ProcessInstace. Then I call this method from: Map<String, Object> data = new HashMap<String, Object>(); data.put("string", "string value"); data.put("int", 42); process = manager.launch("test", data); And how I handle the Human Task: // prepare data Map<String, Object> data = new HashMap<String, Object>(); Map<String, Object> mgnlData = new HashMap<String, Object>(); mgnlData.put("int", 1111); mgnlData.put("string", "new value"); data.put(RunningProcess.DATA, mgnlData); // start user transaction UserTransaction ut = (UserTransaction) new InitialContext().lookup("java:comp/UserTransaction"); ut.begin(); // start processing the task BlockingTaskOperationResponseHandler responseHandler = new BlockingTaskOperationResponseHandler(); this.taskClient.start(summary.getId(), user, responseHandler); responseHandler.waitTillDone(1000); // and complete the task responseHandler = new BlockingTaskOperationResponseHandler(); this.taskClient.complete(summary.getId(), user, map2contentData(data), responseHandler); responseHandler.waitTillDone(2000); // commit transaction ut.commit(); The map2contentData method is based on the code from jBPM5 web example blog post:     protected ContentData map2contentData(Map data) {         ContentData contentData = null;         if (data != null) {             ByteArrayOutputStream bos = new ByteArrayOutputStream();             ObjectOutputStream out;             try {                 out = new ObjectOutputStream(bos);                 out.writeObject(data);                 out.close();                 contentData = new ContentData();                 contentData.setContent(bos.toByteArray());                 contentData.setAccessType(AccessType.Inline);             } catch (IOException e) {                 log.error("Problem saving output data.", e);             }         }         return contentData;     } But it results in the empty process variable in the end (console output): ENTRY SCRIPT: 425984 DATA: {int=42, string=string value} Human Task - Entry action ... Human Task - Exit action EXIT SCRIPT: 425984 Empty DATA I expect sort-of PEBKAC error, but I couldn't find what did I forget... -------------------------------------------------------------- Reply to this message by going to Community [https://community.jboss.org/message/800540#800540] Start a new discussion in jBPM at Community [https://community.jboss.org/choose-container!input.jspa?contentType=1&...]