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Re: How to make a process instance go on with jBPM5?
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created by <a href="https://community.jboss.org/people/jesus.deoliveira">Jesus De Oliveira</a> in <i>jBPM</i> - <a href="https://community.jboss.org/message/719772#719772">View the full discussion</a>
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<div class="jive-rendered-content"><p>Hi,</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>I also have found that you must force to complete the WorkItem after completing a human task.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>A more detailed and a little bit cleaner version of Melih and Donald approach also works perfectly, even when the human task server is running on a separate thread or JVM, provided that the process engine JPA persistence is correctly configured and the original statefull knowledge session is restored upon start-up. Some boilerplate code intentionally omitted for the sake of simplicity:</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><span>// If no previous statefull knowledge session exists public void createStatefullKnowledgeSession() {      //... create kbase, load process definitions, etc ...      EntityManagerFactory emf = Persistence.createEntityManagerFactory("org.jbpm.persistence.jpa");      Environment env = KnowledgeBaseFactory.newEnvironment();      env.set(EnvironmentName.ENTITY_MANAGER_FACTORY, emf);      env.set(EnvironmentName.TRANSACTION_MANAGER, TransactionManagerServices.getTransactionManager());      ksessionStatefull = JPAKnowledgeService.newStatefulKnowledgeSession(kbase, null, env);      int sessionId = ksessionStatefull.getId();      // *** STORE sessionId SOMEWHERE PERSISTENTLY, to be able to      // recover this session later upon services restart }</span><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><pre class="jive-pre"><code class="jive-code jive-java"><font color="navy"><b>public</b></font> <font color="navy"><b>void</b></font> loadStatefullKnowledgeSession() <font color="navy">{</font>
 
     <font color="darkgreen">//... create kbase, load process definitions, etc ...</font>
 
     EntityManagerFactory emf = Persistence.createEntityManagerFactory(<font color="red">"org.jbpm.persistence.jpa"</font>);
     Environment env = KnowledgeBaseFactory.newEnvironment();
     env.set(EnvironmentName.ENTITY_MANAGER_FACTORY, emf);
     env.set(EnvironmentName.TRANSACTION_MANAGER, TransactionManagerServices.getTransactionManager());
 
     <font color="darkgreen">// *** RECOVER sessionId FROM PERSISTENT STORAGE</font>
     <font color="darkgreen">// and use it here to recover persisted process engine state</font>
     ksessionStatefull = JPAKnowledgeService.loadStatefulKnowledgeSession(sessionId, kbase, null, env);
 
<font color="navy">}</font>
</code></pre><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><pre class="jive-pre"><code class="jive-code jive-java"><font color="navy"><b>public</b></font> <font color="navy"><b>void</b></font> complete(<font color="navy"><b>long</b></font> taskId, String userName)
    <font color="navy"><b>throws</b></font> Exception <font color="navy">{</font>
 
            <font color="darkgreen">// ... create the TaskClient (client), and connect it to the task server ...</font>
 
            <font color="darkgreen">// first mark the task as completed on the task server</font>
            taskOperationHandler = <font color="navy"><b>new</b></font> BlockingTaskOperationResponseHandler();
            client.complete(taskId, userName, null, taskOperationHandler);
            taskOperationHandler.waitTillDone(1000);
 
            <font color="darkgreen">// then retrieve the task to extract the workItemId, where the process instance is waiting</font>
            BlockingGetTaskResponseHandler responseHandler = <font color="navy"><b>new</b></font> BlockingGetTaskResponseHandler();
            client.getTask(taskId, responseHandler);
            responseHandler.waitTillDone(1000);
 
            Task task = responseHandler.getTask();
 
            <font color="darkgreen">// force completition of the workItem associated with the task, on which the process instance is waiting</font>
            <font color="navy"><b>final</b></font> Map<String, Object> results = <font color="navy"><b>new</b></font> HashMap<String, Object>();
            ksessionStatefull.getWorkItemManager().completeWorkItem(task.getTaskData().getWorkItemId(), results);
<font color="navy">}</font>
</code></pre><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Hope this will be useful to anyone, best regards!</p></div>
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<p style="margin: 0;">Reply to this message by <a href="https://community.jboss.org/message/719772#719772">going to Community</a></p>
<p style="margin: 0;">Start a new discussion in jBPM at <a href="https://community.jboss.org/choose-container!input.jspa?contentType=1&containerType=14&container=2034">Community</a></p>
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