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Load users and groups to Human task service
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created by <a href="https://community.jboss.org/people/gkalabin">Grigory Kalabin</a> in <i>jBPM</i> - <a href="https://community.jboss.org/message/762488#762488">View the full discussion</a>
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<div class="jive-rendered-content"><p>Hi everybody!</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>I'm using jBPM 5.3.0.Final (except jbpm-human-task which version is 5.3.0.CR1, because something is wrong with my pom.xml or maven repo) and JBoss 7.1.1.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>On application startup I'm loading users and groups data to Human Task Service. Here is the code:</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>private</b></font> <font color="navy"><b>static</b></font> <font color="navy"><b>void</b></font> startHumanTaskService() <font color="navy">{</font>
        EntityManagerFactory emf = Persistence.createEntityManagerFactory(<font color="red">"org.jbpm.task"</font>);
        TaskService taskService = <font color="navy"><b>new</b></font> TaskService(emf, SystemEventListenerFactory.getSystemEventListener());
 
 
        <font color="darkgreen">// init users and groups</font>
        TaskServiceSession taskServiceSession = taskService.createSession();
        <font color="navy"><b>for</b></font> (String username : UsersUtils.getUsers()) <font color="navy">{</font>
            taskServiceSession.addUser(<font color="navy"><b>new</b></font> User(username));
        <font color="navy">}</font>
        <font color="navy"><b>for</b></font> (String group : UsersUtils.getGroups()) <font color="navy">{</font>
            <font color="darkgreen">// guest group already registered? Really?</font>
            <font color="navy"><b>if</b></font> (!group.equals(<font color="red">"guest"</font>)) <font color="navy">{</font>
                taskServiceSession.addGroup(<font color="navy"><b>new</b></font> Group(group));
            <font color="navy">}</font>
        <font color="navy">}</font>
 
 
        MinaTaskServer taskServer = <font color="navy"><b>new</b></font> MinaTaskServer(taskService);
        <font color="darkgreen">// bind to JNDI</font>
        <font color="navy"><b>try</b></font> <font color="navy">{</font>
            <font color="navy"><b>new</b></font> InitialContext().bind(TASK_SERVER_JNDI_NAME, taskServer);
            logger.info(<font color="red">"save "</font> + taskServer + <font color="red">" to "</font> + TASK_SERVER_JNDI_NAME);
        <font color="navy">}</font> <font color="navy"><b>catch</b></font> (NamingException exception) <font color="navy">{</font>
            logger.error(<font color="red">"unable to bind task server"</font>, exception);
        <font color="navy">}</font>
 
 
        <font color="darkgreen">// start the server</font>
        Thread thread = <font color="navy"><b>new</b></font> Thread(taskServer);
        thread.start();
    <font color="navy">}</font>
</code></pre><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>But If I try load "guest" group I have the following exception</p><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">15:47:38,944 ERROR [org.apache.catalina.core.ContainerBase.[jboss.web].[default-host].[/my-jbpm]] (MSC service thread 1-2) Exception sending context
initialized event to listener instance of class com.example.my.jbpm.MyJbpmServletContextListener: java.lang.RuntimeException: Operation failed
        at org.jbpm.task.service.TaskServiceSession.doOperationInTransaction(TaskServiceSession.java:902) [jbpm-human-task-5.3.0.CR1.jar:5.3.0.CR1]
        at org.jbpm.task.service.TaskServiceSession.persistInTransaction(TaskServiceSession.java:868) [jbpm-human-task-5.3.0.CR1.jar:5.3.0.CR1]
        at org.jbpm.task.service.TaskServiceSession.addGroup(TaskServiceSession.java:101) [jbpm-human-task-5.3.0.CR1.jar:5.3.0.CR1]
        at com.example.my.jbpm.utils.jbpm.JbpmApiUtils.startHumanTaskService(JbpmApiUtils.java:149) [classes:]
        at com.example.my.jbpm.utils.jbpm.JbpmApiUtils.initEngine(JbpmApiUtils.java:244) [classes:]
        at com.example.my.jbpm.MyJbpmServletContextListener.contextInitialized(MyJbpmServletContextListener.java:19) [classes:]
        at org.apache.catalina.core.StandardContext.contextListenerStart(StandardContext.java:3392) [jbossweb-7.0.13.Final.jar:]
        at org.apache.catalina.core.StandardContext.start(StandardContext.java:3850) [jbossweb-7.0.13.Final.jar:]
        at org.jboss.as.web.deployment.WebDeploymentService.start(WebDeploymentService.java:90) [jboss-as-web-7.1.1.Final.jar:7.1.1.Final]
        at org.jboss.msc.service.ServiceControllerImpl$StartTask.startService(ServiceControllerImpl.java:1811)
        at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1746)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) [rt.jar:1.6.0_31]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) [rt.jar:1.6.0_31]
        at java.lang.Thread.run(Thread.java:662) [rt.jar:1.6.0_31]
Caused by: javax.persistence.EntityExistsException: a different object with the same identifier value was already associated with the session:
  [org.jbpm.task.Group#guest]
        at org.hibernate.ejb.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1359) [hibernate-entitymanager-3.6.9.Final.jar:3.6.9.Final]
        at org.hibernate.ejb.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1315) [hibernate-entitymanager-3.6.9.Final.jar:3.6.9.Final]
        at org.hibernate.ejb.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1321) [hibernate-entitymanager-3.6.9.Final.jar:3.6.9.Final]
        at org.hibernate.ejb.AbstractEntityManagerImpl.persist(AbstractEntityManagerImpl.java:843) [hibernate-entitymanager-3.6.9.Final.jar:3.6.9.Final]
        at org.jbpm.task.service.persistence.TaskPersistenceManager.saveEntity(TaskPersistenceManager.java:200) [jbpm-human-task-5.3.0.CR1.jar:5.3.0.CR1]
        at org.jbpm.task.service.TaskServiceSession$14.doOperation(TaskServiceSession.java:870) [jbpm-human-task-5.3.0.CR1.jar:5.3.0.CR1]
        at org.jbpm.task.service.TaskServiceSession.doOperationInTransaction(TaskServiceSession.java:890) [jbpm-human-task-5.3.0.CR1.jar:5.3.0.CR1]
        ... 13 more
</code></pre><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Is that true that "guest" group already registered in jBPM? How can I check is currently inserting group persisted or not?</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Thank you for any help. Have a good day!</p></div>
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