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<a href="https://community.jboss.org/index.jspa" style="text-decoration: none; color: #E1E1E1">JBoss Community</a></h1>
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Re: Integrating jBPM 5 into web application - architecture
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created by <a href="https://community.jboss.org/people/joploya">Sandra Renaud</a> in <i>jBPM</i> - <a href="https://community.jboss.org/message/796530#796530">View the full discussion</a>
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<div class="jive-rendered-content"><p>Hello Lisa and Anand,</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>I can't give you my application but this is the relevant code concerning the task management :</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>I use maven so I have these dependencies in the POM :</p><blockquote class="jive-quote"><p><!-- jbpm --></p><p>     <dependency></p><p>               <groupId>org.drools</groupId></p><p>                         <artifactId>drools-compiler</artifactId></p><p>                         <version>5.4.0.Final</version></p><p>                    </dependency></p><p>                     <dependency></p><p>                              <groupId>org.jbpm</groupId></p><p>                              <artifactId>jbpm-bpmn2</artifactId></p><p>                              <version>5.4.0.Final</version></p><p>                              <exclusions></p><p>                    <exclusion></p><p>                          <groupId>dom4j</groupId></p><p>                          <artifactId>dom4j</artifactId></p><p>                    </exclusion></p><p>              </exclusions></p><p>                    </dependency></p><p>                    <dependency></p><p>                              <groupId>org.jbpm</groupId></p><p>                              <artifactId>jbpm-flow</artifactId></p><p>                              <version>5.4.0.Final</version></p><p>                              <exclusions></p><p>                    <exclusion></p><p>                          <groupId>dom4j</groupId></p><p>                          <artifactId>dom4j</artifactId></p><p>                    </exclusion></p><p>              </exclusions></p><p>                    </dependency></p><p>                    <dependency></p><p>                              <groupId>org.jbpm</groupId></p><p>                              <artifactId>jbpm-human-task-core</artifactId></p><p>                              <version>5.4.0.Final</version></p><p>                              <exclusions></p><p>                    <exclusion></p><p>                          <groupId>dom4j</groupId></p><p>                          <artifactId>dom4j</artifactId></p><p>                    </exclusion></p><p>              </exclusions></p><p>                    </dependency></p></blockquote><p>Then, the two java classes :</p><blockquote class="jive-quote"><p>import java.io.InputStream;</p><p>import java.io.InputStreamReader;</p><p>import java.io.Reader;</p><p>import java.io.Serializable;</p><p>import java.util.ArrayList;</p><p>import java.util.HashMap;</p><p>import java.util.List;</p><p>import java.util.Map;</p><p>import java.util.Properties;</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>import javax.annotation.PostConstruct;</p><p>import javax.ejb.LocalBean;</p><p>import javax.ejb.Stateless;</p><p>import javax.enterprise.context.ApplicationScoped;</p><p>import javax.enterprise.inject.Produces;</p><p>import javax.persistence.EntityManagerFactory;</p><p>import javax.persistence.PersistenceUnit;</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>import org.drools.KnowledgeBase;</p><p>import org.drools.SystemEventListenerFactory;</p><p>import org.drools.builder.KnowledgeBuilder;</p><p>import org.drools.builder.KnowledgeBuilderFactory;</p><p>import org.drools.builder.ResourceType;</p><p>import org.drools.io.Resource;</p><p>import org.drools.io.ResourceFactory;</p><p>import org.drools.logger.KnowledgeRuntimeLogger;</p><p>import org.drools.logger.KnowledgeRuntimeLoggerFactory;</p><p>import org.drools.runtime.EnvironmentName;</p><p>import org.drools.runtime.StatefulKnowledgeSession;</p><p>import org.jbpm.process.workitem.email.EmailWorkItemHandler;</p><p>import org.jbpm.task.Group;</p><p>import org.jbpm.task.User;</p><p>import org.jbpm.task.identity.UserGroupCallbackManager;</p><p>import org.jbpm.task.service.TaskService;</p><p>import org.jbpm.task.service.TaskServiceSession;</p><p>import org.slf4j.Logger;</p><p>import org.slf4j.LoggerFactory;</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>//import static org.junit.Assert.*;</p><p>@Stateless</p><p>@LocalBean</p><p>public class KnowledgeSessionProducer implements Serializable{</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>          private static final long serialVersionUID = -4494168896880405667L;</p><p>          private Logger log = LoggerFactory.getLogger(KnowledgeSessionProducer.class);</p><p>          private KnowledgeRuntimeLogger logger;</p><p>  </p><p>    @PersistenceUnit(unitName = "org.jbpm.task")</p><p>    private EntityManagerFactory emf;</p><p>  </p><p>    public @PostConstruct void init(){</p><p>              log.debug("init of KnowledgeSessionProducer ...");</p><p>              TaskService taskService = new TaskService(emf, SystemEventListenerFactory.getSystemEventListener());</p><p>        TaskServiceSession taskSession = taskService.createSession();</p><p>        // Add users</p><p>        @SuppressWarnings("rawtypes")</p><p>                    Map vars = new HashMap();</p><p>        InputStream usersin = KnowledgeSessionProducer.class.getResourceAsStream( "/LoadUsers.mvel" );</p><p>        if(usersin != null) {</p><p>                  Reader reader = new InputStreamReader( usersin );   </p><p>                  @SuppressWarnings("unchecked")</p><p>                  Map<String, User> users = ( Map<String, User> ) TaskService.eval( reader, vars );   </p><p>                  log.debug("Users to load in db : ...");</p><p>                  for ( User user : users.values() ) {</p><p>                            taskSession.addUser( user );</p><p>                            log.debug(" - "+user);</p><p>                  }           </p><p>        }</p><p>        InputStream groupsin = KnowledgeSessionProducer.class.getResourceAsStream( "/LoadGroups.mvel" );</p><p>        if(groupsin != null) {</p><p>                  Reader reader = new InputStreamReader( groupsin );   </p><p>                  @SuppressWarnings("unchecked")</p><p>                  Map<String, Group> groups = ( Map<String, Group> ) TaskService.eval( reader, vars );     </p><p>                  log.debug("Groups to load in db : ...");</p><p>                  for ( Group group : groups.values() ) {</p><p>                            taskSession.addGroup( group );</p><p>                            log.debug(" - "+group);</p><p>                  }</p><p>        }</p><p>        // try to get the usergroup callback properties</p><p>        InputStream usergroupsin = KnowledgeSessionProducer.class.getResourceAsStream(  "/jbpm.usergroup.callback.properties" );</p><p>        if(usergroupsin != null) {</p><p>                  Properties callbackproperties = new Properties();</p><p>                  try {</p><p>                      // Properties.load(Reader) is a JDK 6 method</p><p>                            callbackproperties.load(usergroupsin);</p><p>                            UserGroupCallbackManager.getInstance().setCallbackFromProperties(callbackproperties);</p><p>                            System.out.println("Task service registered usergroup callback ...");</p><p>                  } catch (Exception e) {</p><p>                            System.out.println("Task service unable to register usergroup callback ...");</p><p>                  }</p><p>        }</p><p>        taskSession.dispose();</p><p>        System.out.println("Task service started correctly!");</p><p>        System.out.println("Task service running ...");</p><p>    }</p><p>    </p><p>          @Produces</p><p>          @ApplicationScoped</p><p>          public StatefulKnowledgeSession produceKnowledgeSession(){</p><p>                    log.debug("produce the KnowledgeSession ...");</p><p>                    //Create the knowledgeBase</p><p>                    /*This factory is used to build the knowledge base resources that are held collectively in KnowledgePackages.*/</p><p>                    KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();</p><p>  </p><p>                    //Add all processes to the knowledgeBuilder</p><p>                    List<Resource> resources = getProcessDefinitionList();</p><p>                    for (Resource resource : resources) {</p><p>                              kbuilder.add(resource, ResourceType.BPMN2);</p><p>                    }</p><p>  </p><p>                    /*Create a new KnowledgeBase from the knowledge packages that have been added to this builder. </p><p>                     * An exception is thrown if there are any errors.*/</p><p>//                    assertFalse( kbuilder.hasErrors() );</p><p>                    if ( kbuilder.hasErrors() ) {</p><p>                         log.error( kbuilder.getErrors().toString() );</p><p>                     }</p><p>                    KnowledgeBase kbase = kbuilder.newKnowledgeBase();</p><p>  </p><p>                    /*Create a new StatefulKnowledgeSession using the default session configuration. </p><p>                     * Don't forget to dispose() session when you are done.</p><p>                     * </p><p>                     * StatefulKnowledgeSession is the most common way to interact with the engine. </p><p>                     * A StatefulKnowledgeSession allows the application to establish an iterative conversation with the engine, </p><p>                     * where the state of the session is kept across invocations.*/</p><p>                    StatefulKnowledgeSession ksession = kbase.newStatefulKnowledgeSession();</p><p>  </p><p>        logger = KnowledgeRuntimeLoggerFactory.newThreadedFileLogger(ksession, "loggerFile", 1000);</p><p>        </p><p>        /*A work item manager is responsible for finding the right work item handler when a work item should be executed </p><p>         * and should be notified when this work item has been completed (or aborted).</p><p>         * </p><p>         * Register the given handler for all work items of the given type of work </p><p>         * This part is done in the LocalHumanTaskService*/</p><p>        </p><p>//        ksession.getWorkItemManager().registerWorkItemHandler("Human Task", handler );</p><p>        </p><p>        ksession.getEnvironment().set(EnvironmentName.ENTITY_MANAGER_FACTORY, emf);</p><p>        </p><p>        /*</p><p>         * Register WorkItem Handler for Email</p><p>         */</p><p>        //EmailWorkItemHandler emailHandler =  new EmailWorkItemHandler();</p><p>        //ksession.getWorkItemManager().registerWorkItemHandler("Email", emailHandler);</p><p>        </p><p>        return ksession;</p><p>          }</p><p>  </p><p>          public KnowledgeRuntimeLogger getLogger(){</p><p>                    return this.logger;</p><p>          }</p><p>  </p><p>          private List<Resource> getProcessDefinitionList(){</p><p>                    List<Resource> resourceList = new ArrayList<>();</p><p>                    resourceList.add(ResourceFactory.newClassPathResource("workflows/MyFlow.bpmn2"));</p><p>                    /**</p><p>                     * TODO </p><p>                     * add all other process here</p><p>                     */</p><p>                    return resourceList;</p><p>          }</p><p>}</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p></blockquote><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><blockquote class="jive-quote"><p>import javax.annotation.PostConstruct;</p><p>import javax.enterprise.context.SessionScoped;</p><p>import javax.enterprise.event.Event;</p><p>import javax.faces.application.FacesMessage;</p><p>import javax.faces.context.FacesContext;</p><p>import javax.inject.Inject;</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>import org.drools.runtime.StatefulKnowledgeSession;</p><p>import org.jboss.seam.security.Identity;</p><p>import org.drools.runtime.process.ProcessInstance;</p><p>import org.jbpm.task.Status;</p><p>import org.jbpm.task.query.TaskSummary;</p><p>import org.jbpm.task.service.local.LocalHumanTaskService;</p><p>import org.jbpm.workflow.instance.WorkflowProcessInstance;</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>import com.st.ams.tools.ClaimEventListener;</p><p>import com.ste.ws.authentication.seam.api.UserLDAP;</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>/**</p><p> * Linked to the task management view</p><p> *</p><p> */</p><p>public @Named @SessionScoped class TaskManager implements Serializable{</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>          private static final long serialVersionUID = 7768657778155604411L;</p><p>  </p><p>          protected @Inject Identity identity;</p><p>          private @Inject StatefulKnowledgeSession kSession;</p><p>          private @Inject Event<ClaimEventListener> event;</p><p>  </p><p>          private List<Status> listStatus = new ArrayList<Status>();</p><p>  </p><p>          public org.jbpm.task.TaskService getTaskService(){</p><p>                    return LocalHumanTaskService.getTaskService(kSession);</p><p>          }</p><p>  </p><p>          private List<TaskSummary> userTaskList = new ArrayList<TaskSummary>();</p><p>          private Map<String, List<TaskSummary>> groupTaskMap = new HashMap<String, List<TaskSummary>>();</p><p>          private TaskSummary manageTask;</p><p>          private List<String> groups;</p><p>  </p><p>  </p><p>  </p><p>          public @PostConstruct void init(){</p><p>                    System.out.println("init task manager ...");</p><p>  </p><p>                    //Load user tasks</p><p>                    listStatus.clear();</p><p>                    listStatus.add(Status.Reserved);listStatus.add(Status.InProgress);</p><p>                    System.out.println("load task list for user : "+((UserLDAP)identity.getUser()).getUser().getLogin());</p><p>                    userTaskList = new ArrayList<TaskSummary>(getTaskService().getTasksAssignedAsPotentialOwnerByStatus(</p><p>                                                                                ((UserLDAP)identity.getUser()).getUser().getLogin(), </p><p>                                                                                listStatus, </p><p>                                                                                "en-UK"));</p><p>  </p><p>                    //Load groups and tasks for each group</p><p>                    groups = new ArrayList<String>();</p><p>                    for(String grp : ((UserLDAP)identity.getUser()).getUser().getGroups()){</p><p>                 groups.add(grp);</p><p>                 groupTaskMap.put(grp, getGroupTasks(grp));</p><p>                    }</p><p>          }</p><p>  </p><p>  </p><p>          public List<TaskSummary> getUserTaskList() {</p><p>                    if((userTaskList == null) || userTaskList.isEmpty()){</p><p>                              listStatus.clear();</p><p>                              listStatus.add(Status.Reserved);listStatus.add(Status.InProgress);</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>               //Trick because UserGroupCallBackImpl is not properly implemented</p><p>               //TODO correction</p><p>                              Set<TaskSummary> set = new HashSet<TaskSummary>(getTaskService().getTasksAssignedAsPotentialOwnerByStatus(</p><p>                                                                                                                                                      ((UserLDAP)identity.getUser()).getUser().getLogin(), </p><p>                                                                                                                                                      listStatus, </p><p>                                                                                                                                                      "en-UK"));</p><p>                              userTaskList = new ArrayList<TaskSummary>(set);</p><p>                    }</p><p>                    return userTaskList;</p><p>          }</p><p>  </p><p>          /**</p><p>           * In order to refresh the user task list</p><p>           * This function allow to clear the content of the list</p><p>           */</p><p>          public void clearUserTaskList(){</p><p>                    userTaskList.clear();</p><p>          }</p><p>  </p><p>          /**</p><p>           * In order to refresh the groups task list</p><p>           * This function allow to clear the content of all lists</p><p>           */</p><p>          public void clearAllGroupTaskList(){</p><p>                    List<String> keys = new ArrayList<>(groupTaskMap.keySet());</p><p>                    for(String grp : keys){</p><p>                              clearGroupTaskList(grp);</p><p>                    }</p><p>          }</p><p>  </p><p>          /**</p><p>           * In order to refresh the group task list</p><p>           * This function allow to clear the content of the list</p><p>           */</p><p>          public void clearGroupTaskList(String group){</p><p>                    groupTaskMap.put(group, null);</p><p>          }</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>          /**</p><p>           * return all group tasks available for the user</p><p>           * @return List<TaskSummary></p><p>           */</p><p>          public List<TaskSummary> getAllGroupTaskList() {</p><p>                    List<TaskSummary> allGroupTask = new ArrayList<TaskSummary>();</p><p>                    Iterable<List<TaskSummary>> mapValues = groupTaskMap.values();</p><p>                    for(List<TaskSummary> entry : mapValues){</p><p>                              allGroupTask.addAll(entry);</p><p>                    }</p><p>                    return allGroupTask;</p><p>          }</p><p>  </p><p>          public List<String> getUserGroups(){</p><p>                    if((groups == null) || groups.isEmpty()){</p><p>                              groups = new ArrayList<String>();</p><p>                              for(String grp : ((UserLDAP)identity.getUser()).getUser().getGroups()){</p><p>                   <span style="font-size: 10pt;"> groups.add(grp);</span></p><p>                              }</p><p>                    }</p><p>                    return groups;</p><p>          }</p><p>  </p><p>          /**</p><p>           * return tasks available for the group</p><p>           * @param group</p><p>           * @return List<TaskSummary></p><p>           */</p><p>          public List<TaskSummary> getGroupTaskList(String group){</p><p>                    if((groupTaskMap.get(group) == null) || groupTaskMap.get(group).isEmpty()){</p><p>                              groupTaskMap.put(group, getGroupTasks(group));</p><p>                    }</p><p>                    return groupTaskMap.get(group);</p><p>          }</p><p>  </p><p>          /**</p><p>           * return tasks available for the group</p><p>           * @param group</p><p>           * @return List<TaskSummary></p><p>           */</p><p>          public List<TaskSummary> getGroupTasks(String group){</p><p>                    listStatus.clear();</p><p>                    listStatus.add(Status.Ready);</p><p>         </p><p>          </p><p>          //Trick because UserGroupCallBackImpl is not properly implemented</p><p>          //TODO correction</p><p><span style="font-size: 10pt;">          Set<TaskSummary> set = new HashSet<TaskSummary>(getTaskService().getTasksAssignedAsPotentialOwnerByStatus(group, listStatus, "en-UK"));</span></p><p>                    return new ArrayList<TaskSummary>(set);</p><p>          }</p><p>  </p><p>          public void removeGroup(String group){</p><p>                    groups.remove(group);</p><p>          }</p><p>  </p><p>          public void addGroup(String group){</p><p>                    if((group != null) && !group.isEmpty())</p><p>                              groups.add(group);</p><p>          }</p><p>  </p><p>          public void addGroupTask(String group){</p><p>                    groupTaskMap.put(group, getGroupTasks(group));</p><p>          }</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>          /**</p><p>           * Start a new processInstance of an existing Process</p><p>           * and set the variables of this instance</p><p>           * @param processId, map of variables, id of the requestor</p><p>           * @return ProcessInstance created</p><p>           */</p><p>          public ProcessInstance startProcess(String processId, Map<String, Object> parameters){</p><p>                    ProcessInstance p = kSession.startProcess(processId,parameters);</p><p>                    return p;</p><p>          }</p><p>  </p><p>          /**</p><p>           * Return the WorkflowProcessInstance associated to a Task</p><p>           * This instance allow to access the map of variables</p><p>           * @return WorkflowProcessInstance managed</p><p>           */</p><p>          public WorkflowProcessInstance getWorkflowProcessInstance(long processInstanceId){</p><p>                    return (WorkflowProcessInstance)kSession.getProcessInstance(processInstanceId);</p><p>          }</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>          /**</p><p>           * Start a new processInstance of an existing Process</p><p>           * @param processId</p><p>           * @return ProcessInstance created</p><p>           */</p><p>          public ProcessInstance startProcess(String processId){</p><p>                    return kSession.startProcess(processId);</p><p>          }</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>          /**</p><p>           * When a user claim a task, the task go to RESERVED state</p><p>           * Then we call start and the task goes to IN_PROGRESS state</p><p>           * and is not visible for others</p><p>           * @param task</p><p>           */</p><p>          public void claimTask(TaskSummary task){</p><p>                    addMessage("task "+task.getId()+" claimed");</p><p>                    setManageTask(task);</p><p>                    getTaskService().claim(task.getId(), </p><p>                                        ((UserLDAP)identity.getUser()).getUser().getLogin());</p><p>                    getTaskService().start(task.getId(), ((UserLDAP)identity.getUser()).getUser().getLogin());</p><p>                    event.fire(new ClaimEventListener());</p><p>          }</p><p>  </p><p>          /**</p><p>           * return a task to group task</p><p>           * @param task</p><p>           */</p><p>          public void revokeTask(TaskSummary task){</p><p>                    addMessage("task "+task.getId()+" revoked");</p><p>                    setManageTask(task);</p><p>                    getTaskService().release(task.getId(), </p><p>                                        ((UserLDAP)identity.getUser()).getUser().getLogin());</p><p>          }</p><p>  </p><p>          public void completeTask(TaskSummary task, Object results){</p><p>                    getTaskService().completeWithResults(task.getId(), </p><p>                                        ((UserLDAP)identity.getUser()).getUser().getLogin(), results);</p><p>          }</p><p>  </p><p>          /**</p><p>           * The current manage task</p><p>           * @return TaskSummary</p><p>           */</p><p>          public TaskSummary getManageTask() {</p><p>                    return manageTask;</p><p>          }</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>          /**</p><p>           * Set the currently manage task </p><p>           * (save it during the session)</p><p>           * @param manageTask</p><p>           */</p><p>          private void setManageTask(TaskSummary manageTask) {</p><p>                    this.manageTask = manageTask;</p><p>          }</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>          /**</p><p>           * faces message rendered</p><p>           * @param message to display</p><p>           */</p><p>          public void addMessage(String summary) {  </p><p>        FacesMessage message = new FacesMessage(FacesMessage.SEVERITY_INFO, summary,  null);  </p><p>        FacesContext.getCurrentInstance().addMessage(null, message);  </p><p>    } </p><p>  </p><p>}</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p></blockquote><p>You have to implement the UserGroupCallBackImpl. (See the doc for that : <a class="jive-link-external-small" href="http://docs.jboss.org/jbpm/v5.4/userguide/ch.human-tasks.html#d0e5419">http://docs.jboss.org/jbpm/v5.4/userguide/ch.human-tasks.html#d0e5419</a>)</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="margin-bottom: .0001pt;"><span style="font-size: 10pt; font-family: Arial, sans-serif;">You have to register your implementation of usergroupcallback by creating a file jbpm.usergroup.callback.properties in the folder resources.</span></p><p style="margin-bottom: .0001pt;"><blockquote class="jive-quote"><span style="font-family: Arial, sans-serif; font-size: 10pt;">jbpm.usergroup.callback=com.your.package.path.with.dot.MyUserGroupCallbackImpl</span></blockquote></p><p style="margin-bottom: .0001pt;"> <a href="https://community.jboss.org/servlet/JiveServlet/showImage/2-796530-20279/resources.png"><span> https://community.jboss.org/servlet/JiveServlet/downloadImage/2-796530-20279/252-141/resources.png </span></a></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>The persistence.xml must be configured like this :</p></div>
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