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Re: How to create a simple waiting workflow
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created by <a href="https://community.jboss.org/people/espinosa_cz">Jan Uhlir</a> in <i>jBPM</i> - <a href="https://community.jboss.org/message/717300#717300">View the full discussion</a>
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<div class="jive-rendered-content"><p>This works (6a):</p><p><a href="https://community.jboss.org/servlet/JiveServlet/showImage/17999/jbpm+screenshot+wait+state+working+6a.png"><span> https://community.jboss.org/servlet/JiveServlet/downloadImage/17999/jbpm+screenshot+wait+state+working+6a.png </span></a></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>This works too (6b):</p><p><a href="https://community.jboss.org/servlet/JiveServlet/showImage/18000/jbpm+screenshot+wait+state+working+6b.png"><span> https://community.jboss.org/servlet/JiveServlet/downloadImage/18000/jbpm+screenshot+wait+state+working+6b.png </span></a></p><p><strong>BPMN2 Code 6a:</strong></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><strong>BPMN2 Code 6b:</strong></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><strong>Code for class behind JavaTask task node:</strong></p><p>public class JavaTask6WorkItemHandler implements WorkItemHandler {</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>    @Override</p><p>    public void executeWorkItem(WorkItem workItem, WorkItemManager manager) {</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>        System.out.println("Inside JavaTask : " + workItem.getName());</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>        // notify manager that work item has been completed</p><p>        // Essential! Custom tasks are by default set "wait for completion = true", this makes them "false"</p><p>        manager.completeWorkItem(workItem.getId(), 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>    @Override</p><p>    public void abortWorkItem(WorkItem workItem, WorkItemManager manager) {</p><p>        // do nothing</p><p>    }</p><p>}</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><strong>Test run code, start and signalize the process:</strong></p><p>public class SimpleProcess6aRun {</p><p>    </p><p>    public static void main(String[] args) {</p><p>        KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();</p><p>        kbuilder.add(ResourceFactory.newClassPathResource("simple_process_6a.bpmn"), ResourceType.BPMN2);</p><p>        KnowledgeBase kbase = kbuilder.newKnowledgeBase();</p><p>        StatefulKnowledgeSession ksession = kbase.newStatefulKnowledgeSession();</p><p>        ksession.getWorkItemManager().registerWorkItemHandler("JavaTask6", new JavaTask6WorkItemHandler());</p><p>        </p><p>        ProcessInstance processInstance = ksession.startProcess("SimpleProcess6a");</p><p>        Assert.assertNotNull(processInstance);</p><p>        </p><p>        // print all running processes</p><p>        Collection allProcesses = ksession.getProcessInstances();</p><p>        for (ProcessInstance p : allProcesses) {</p><p>            System.out.println("Running - " + p);</p><p>        }</p><p>        </p><p>        // test wait state</p><p>        Assert.assertEquals(ProcessInstance.STATE_ACTIVE, processInstance.getState());</p><p>        </p><p>        // send signal</p><p>        // ksession.signalEvent("fooSignal", "fooSignal"); // global signal</p><p>        processInstance.signalEvent("fooSignal", null); // process specific signal</p><p>        </p><p>        // test successful finish (test state)</p><p>        Assert.assertEquals(ProcessInstance.STATE_COMPLETED, processInstance.getState());</p><p>    }</p><p>}</p><p>// the code for SimpleProcess6bRun (6b process) is analogous</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>This <a class="jive-link-thread-small" href="https://community.jboss.org/thread/165545">forum thread</a> is related too. I found Esteban Aliverti <span class="font-color-meta">comment very helpful and so his examples on github.</span></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Is there any real difference between 6a and 6b? Otherwise I am going to use the simpler variant, without Gateway.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>If I have, let's say, process with 20 wait nodes, I have to add 20 more Event nodes after every task?</p></div>
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