[jboss-user] [jBPM] - Re: JBPM 5.4.0-Final: Human Task variable mapping is not working

[vchmakov]

vchmakov [https://community.jboss.org/people/vchmakov] created the discussion

"Re: JBPM 5.4.0-Final: Human Task variable mapping is not working"

To view the discussion, visit: https://community.jboss.org/message/789841#789841

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Hi Maciej,
 
Your proposed approach works fine in terms that the my process now sees the result values. However, when the time comes for the session to complete the tasks is fails. I suspect the reason for this is the same – different persistent context. 
 
        *private* *void* handleCompletedTask(*long* taskId) {
 
// currentClient is a reference to my LocalTaskService instance I create for completeting the tasks
 
            Task task = currentClient.getTask(taskId);
            *long* workItemId = task.getTaskData().getWorkItemId();
            *if* (task.getTaskData().getStatus() == Status.+Completed+) {
                String userId = task.getTaskData().getActualOwner().getId();
                Map<String, Object> results = *new* HashMap<String, Object>();
                results.put("ActorId", userId);
                *long* contentId = task.getTaskData().getOutputContentId();
                *if* (contentId != -1) {
                    Content content = currentClient.getContent(contentId);
                    Object result = ContentMarshallerHelper.+unmarshall+(content.getContent(), session.getEnvironment());
                    results.put("Result", result);
                    *if* (result *instanceof* Map) {
                        Map<?, ?> map = (Map<?, ?>) result;
                        *for* (Map.Entry<?, ?> entry : map.entrySet()) {
                            *if* (entry.getKey() *instanceof* String) {
                                results.put((String) entry.getKey(), entry.getValue());
                            }
                        }
                    }
è  fails here
                    session.getWorkItemManager().completeWorkItem(task.getTaskData().getWorkItemId(), results);
                }
                *else* {
                    session.getWorkItemManager().completeWorkItem(workItemId, results);
                }
            }
            *else* {
                logger_processes.debug("session.getWorkItemManager().abortWorkItem()");
                session.getWorkItemManager().abortWorkItem(workItemId);
            }
        }
 
processTaskCommand() error:: com.thoughtworks.xstream.io.StreamException:  : only whitespace content allowed before start tag and not B (position: START_DOCUMENT seen B... @1:1) 
                at com.thoughtworks.xstream.io.xml.XppReader.pullNextEvent(XppReader.java:124) [xstream-1.4.1.jar:]
                at com.thoughtworks.xstream.io.xml.AbstractPullReader.readRealEvent(AbstractPullReader.java:148) [xstream-1.4.1.jar:]
                at com.thoughtworks.xstream.io.xml.AbstractPullReader.readEvent(AbstractPullReader.java:141) [xstream-1.4.1.jar:]
                at com.thoughtworks.xstream.io.xml.AbstractPullReader.move(AbstractPullReader.java:118) [xstream-1.4.1.jar:]
                at com.thoughtworks.xstream.io.xml.AbstractPullReader.moveDown(AbstractPullReader.java:103) [xstream-1.4.1.jar:]
                at com.thoughtworks.xstream.io.xml.XppReader.<init>(XppReader.java:63) [xstream-1.4.1.jar:]
                at com.thoughtworks.xstream.io.xml.AbstractXppDriver.createReader(AbstractXppDriver.java:58) [xstream-1.4.1.jar:]
                at com.thoughtworks.xstream.XStream.fromXML(XStream.java:895) [xstream-1.4.1.jar:]
                at com.thoughtworks.xstream.XStream.fromXML(XStream.java:886) [xstream-1.4.1.jar:]
                at org.drools.process.core.datatype.impl.type.ObjectDataType.readValue(ObjectDataType.java:77) [drools-core-5.5.0.Final.jar:5.5.0.Final]
                at org.jbpm.workflow.instance.node.WorkItemNodeInstance.triggerCompleted(WorkItemNodeInstance.java:223) [jbpm-flow-5.4.0.Final.jar:5.4.0.Final]
                at org.jbpm.workflow.instance.node.HumanTaskNodeInstance.triggerCompleted(HumanTaskNodeInstance.java:90) [jbpm-flow-5.4.0.Final.jar:5.4.0.Final]
                at org.jbpm.workflow.instance.node.WorkItemNodeInstance.workItemCompleted(WorkItemNodeInstance.java:309) [jbpm-flow-5.4.0.Final.jar:5.4.0.Final]
                at org.jbpm.workflow.instance.node.WorkItemNodeInstance.signalEvent(WorkItemNodeInstance.java:285) [jbpm-flow-5.4.0.Final.jar:5.4.0.Final]
                at org.jbpm.workflow.instance.impl.WorkflowProcessInstanceImpl.signalEvent(WorkflowProcessInstanceImpl.java:342) [jbpm-flow-5.4.0.Final.jar:5.4.0.Final]
                at org.drools.persistence.jpa.processinstance.JPAWorkItemManager.completeWorkItem(JPAWorkItemManager.java:121) [drools-persistence-jpa-5.5.0.Final.jar:5.5.0.Final]
                at org.drools.command.runtime.process.CompleteWorkItemCommand.execute(CompleteWorkItemCommand.java:69) [drools-core-5.5.0.Final.jar:5.5.0.Final]
                at org.drools.command.runtime.process.CompleteWorkItemCommand.execute(CompleteWorkItemCommand.java:32) [drools-core-5.5.0.Final.jar:5.5.0.Final]
                at org.drools.command.impl.DefaultCommandService.execute(DefaultCommandService.java:36) [drools-core-5.5.0.Final.jar:5.5.0.Final]
                at org.drools.persistence.SingleSessionCommandService.execute(SingleSessionCommandService.java:373) [drools-persistence-jpa-5.5.0.Final.jar:5.5.0.Final]
                at org.drools.command.impl.CommandBasedStatefulKnowledgeSession$1.completeWorkItem(CommandBasedStatefulKnowledgeSession.java:150) [drools-core-5.5.0.Final.jar:5.5.0.Final]
                at BvLocalHTWorkItemHandler$TaskCompletedHandler.handleCompletedTask(BvLocalHTWorkItemHandler.java:96) 
…
…
 
It seems like either I need to put Drools and Task Service inside the same persistent context or split the transaction boundaries between Drools and Task Service. The second one is in fact a recommended way here which  has been previously discussed in another posts, but I strongly disagree with the Task Service decoupling idea.
 
Any other thoughts/ideas?
 
Thanks,
 
Vladimir


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