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<userTask id="dynamicAssignmentTask" name="Dynamic Assignment Task" > <documentation>Some documentation here</documentation> <extensionElements> <activiti:taskListener event="create" class="org.activiti.tasklistener.DynamicAssignmentHandler" /> </extensionElements> <potentialOwner> <resourceAssignmentExpression> <formalExpression>user(kermit), group(DynamicAssignmentGroup)</formalExpression> </resourceAssignmentExpression> </potentialOwner> </userTask>
@Override public void notify(DelegateTask delegateTask) { // This doesn't delete the candidate group specified in the XML. delegateTask.deleteCandidateGroup("DynamicAssignmentGroup"); // This doesn't delete the user specified in the XML. delegateTask.deleteCandidateUser("kermit"); // This is not specified in the XML and works perfectly. delegateTask.addCandidateUser("gonzo"); delegateTask.deleteCandidateUser("gonzo"); }
In the XML I've defined a user task with a task listener on create event like this:Quote:<userTask id="dynamicAssignmentTask" name="Dynamic Assignment Task" ><documentation>Some documentation here</documentation><extensionElements><activiti:taskListener event="create" class="org.activiti.tasklistener.DynamicAssignmentHandler" /></extensionElements><potentialOwner><resourceAssignmentExpression><formalExpression>user(kermit), group(DynamicAssignmentGroup)</formalExpression></resourceAssignmentExpression></potentialOwner></userTask>
Set<IdentityLink> identityLinks = delegateTask.getCandidates();<br> Iterator<IdentityLink> iterator = identityLinks.iterator();<br> <br> // Contains all candidate users (includes individual users and users from groups)<br> List<String> candidateUsers = new LinkedList<String>();<br> <br> // Iterate over all candidate users for this task<br> while (iterator.hasNext()) {<br> IdentityLink identityLink = iterator.next();<br> <br> if (identityLink.getType().equals(IdentityLinkType.CANDIDATE)) {<br> String userId = identityLink.getUserId();<br> String groupId = identityLink.getGroupId();<br> <br> if (userId != null) { // Single candidate user<br> log.debug("userId (single user): " + userId);<br> candidateUsers.add(userId);<br> } else if (groupId != null) { // Group candidate users<br> log.debug("groupId: " + groupId);<br> <br> List<User> users = ProcessEngines.getDefaultProcessEngine().getIdentityService().createUserQuery().memberOfGroup(groupId).list();<br> for (User user : users) {<br> candidateUsers.add(user.getId());<br> }<br> } else {<br> log.warn("userId and groupId are null");<br> }<br> }<br> <br> }<br> <br> log.info("# candidate users = " + candidateUsers.size());<br> assert candidateUsers.size() != 0;
