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JBPM 4.3: Is it possible to leave current state on timer listener?
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created by <a href="http://community.jboss.org/people/nsaputro">Nugroho Saputro</a> in <i>jBPM</i> - <a href="http://community.jboss.org/message/536790#536790">View the full discussion</a>
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<div class="jive-rendered-content"><p>Hi All,</p><div> </div><div id="_mcePaste"> </div><div id="_mcePaste">Please help me, I am newbie at JBPM 4.x. I have a problem with leaving a state programmatically in timer listener. I always get exception like this:</div><div> </div><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><pre class="jive-pre"><code class="jive-code">
12 Apr 2010 11:21:11 ERROR org.jbpm.pvm.internal.cmd.ExecuteJobCmd  - exception while executing 'timer[30|2010-04-12 11:21:11,412|timeout]'
org.jbpm.api.JbpmException: execution[ADSLProvisioning.22] is not active: inactive-scope
     at org.jbpm.pvm.internal.model.ExecutionImpl.checkActive(ExecutionImpl.java:1024)
     at org.jbpm.pvm.internal.model.ExecutionImpl.take(ExecutionImpl.java:466)
     at org.jbpm.pvm.internal.model.ExecutionImpl.takeDefaultTransition(ExecutionImpl.java:449)
     at uk.co.upshot.jbpm.handler.OrderStatusChecker.notify(OrderStatusChecker.java:62)
     at org.jbpm.pvm.internal.wire.usercode.UserCodeEventListener.notify(UserCodeEventListener.java:39)
</code></pre><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><p>What I would like to do is checking status from database repeatedly every X minutes. When it found certain status e.g. COMPLETED it should go to the next state, otherwise it will repeat until that status is reached. </p><div> </div><div>Currently I implement it as a state with a repeated timer:</div><div> </div><pre class="jive-pre"><code class="jive-code jive-xml">
<span class="jive-xml-tag"><state name="Check Order Status"></span>
  <span class="jive-xml-tag"><on event="timeout"></span>
    <span class="jive-xml-tag"><timer duedate="10 minutes" repeat="10 minutes"></span><span class="jive-xml-tag"></timer></span>
    <span class="jive-xml-tag"><event-listener expr="#{OrderStatusChecker}"></span><span class="jive-xml-tag"></event-listener></span>
  <span class="jive-xml-tag"></on></span>
  <span class="jive-xml-tag"><transition name="to-status-decision" to="status-decision"></span><span class="jive-xml-tag"></transition></span>
<span class="jive-xml-tag"></state></span>
</code></pre><p style="min-height: 8pt; height: 8pt; padding: 0px;">  </p></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>and on the timer listener:</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>class</b></font> OrderStatusChecker <font color="navy"><b>implements</b></font> EventListener <font color="navy">{</font>
 
    <font color="navy"><b>public</b></font> <font color="navy"><b>void</b></font> notify(EventListenerExecution event) <font color="navy"><b>throws</b></font> Exception <font color="navy">{</font>       
        <font color="darkgreen">// Check status.</font>
        String status = ...... get status from Database ...
        event.getProcessInstance().setVariable(<font color="red">"status"</font>, status);
       
        <font color="navy"><b>if</b></font> (status.equals(<font color="red">"COMPLETED"</font>)) <font color="navy">{</font>
            <font color="darkgreen">// Leave current state</font>
            ActivityExecution execution = (ActivityExecution) event.getParent();
            execution.takeDefaultTransition();
        <font color="navy">}</font>               
    <font color="navy">}</font>
<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><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><p>Is it possible to do that in JBPM?  If it's not possible, is there any workaround for my case?</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>I use JBPM4.3 with spring 2.5.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Thank you.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Regards,</p><p>Nugroho</p></p></div>
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