<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<body link="#355491" alink="#4262a1" vlink="#355491" style="background: #e2e2e2; margin: 0; padding: 20px;">
<div>
<table cellpadding="0" bgcolor="#FFFFFF" border="0" cellspacing="0" style="border: 1px solid #dadada; margin-bottom: 30px; width: 100%; -moz-border-radius: 6px; -webkit-border-radius: 6px;">
<tbody>
<tr>
<td>
<table border="0" cellpadding="0" cellspacing="0" bgcolor="#FFFFFF" style="border: solid 2px #ccc; background: #dadada; width: 100%; -moz-border-radius: 6px; -webkit-border-radius: 6px;">
<tbody>
<tr>
<td bgcolor="#000000" valign="middle" height="58px" style="border-bottom: 1px solid #ccc; padding: 20px; -moz-border-radius-topleft: 3px; -moz-border-radius-topright: 3px; -webkit-border-top-right-radius: 5px; -webkit-border-top-left-radius: 5px;">
<h1 style="color: #333333; font: bold 22px Arial, Helvetica, sans-serif; margin: 0; display: block !important;">
<!-- To have a header image/logo replace the name below with your img tag -->
<!-- Email clients will render the images when the message is read so any image -->
<!-- must be made available on a public server, so that all recipients can load the image. -->
<a href="http://community.jboss.org/index.jspa" style="text-decoration: none; color: #E1E1E1">JBoss Community</a></h1>
</td>
</tr>
<tr>
<td bgcolor="#FFFFFF" style="font: normal 12px Arial, Helvetica, sans-serif; color:#333333; padding: 20px; -moz-border-radius-bottomleft: 4px; -moz-border-radius-bottomright: 4px; -webkit-border-bottom-right-radius: 5px; -webkit-border-bottom-left-radius: 5px;"><h3 style="margin: 10px 0 5px; font-size: 17px; font-weight: normal;">
Event Listener Problem
</h3>
<span style="margin-bottom: 10px;">
created by <a href="http://community.jboss.org/people/dev.katiyar">devendra katiyar</a> in <i>jBPM</i> - <a href="http://community.jboss.org/message/569802#569802">View the full discussion</a>
</span>
<hr style="margin: 20px 0; border: none; background-color: #dadada; height: 1px;">
<div class="jive-rendered-content"><p>I am implement Log Event Listener using example given in user guide</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><pre class="programlisting"><a class="jive-link-anchor-small"><process name="EventListener" xmlns="http://jbpm.org/4.4/jpdl"><br/><br/>  <on event="start"><br/>    <event-listener class="org.jbpm.examples.eventlistener.LogListener"><br/>      <field name="msg"><string value="start on process definition"/></field><br/>    </event-listener><br/>  </on><br/><br/>  <start><br/>    <transition to="wait"/><br/>  </start><br/><br/>  <state name="wait"><br/>    <on event="start"><br/>      <event-listener class="org.jbpm.examples.eventlistener.LogListener"><br/>        <field name="msg"><string value="start on activity wait"/></field><br/>      </event-listener><br/>    </on><br/>    <on event="end"><br/>      <event-listener class="org.jbpm.examples.eventlistener.LogListener"><br/>        <field name="msg"><string value="end on activity wait"/></field><br/>      </event-listener><br/>    </on><br/>    <transition to="park"><br/>      <event-listener class="org.jbpm.examples.eventlistener.LogListener"><br/>        <field name="msg"><string value="take transition"/></field><br/>      </event-listener><br/>    </transition><br/>  </state><br/><br/>  <state name="park"/><br/><br/></process><br/><br/><br/><br/><br/>and LogListener class like below <br/><br/><br/><pre class="programlisting"><a class="jive-link-anchor-small">public class <strong>LogListener</strong> implements EventListener {<br/><br/>  // value gets injected from process definition<br/>  String msg;<br/><br/>  public void notify(EventListenerExecution execution) {<br/>    List<String> logs = (List<String>) execution.getVariable("logs");<br/>    if (logs==null) {<br/>      logs = new ArrayList<String>();<br/>      execution.setVariable("logs", logs);<br/>    }<br/><br/>    logs.add(msg);<br/><br/>    execution.setVariable("logs", logs);<br/>  }<br/>}</a></pre>
<br/><br/><br/>but when I am testing using Junit <br/><br/>
<pre class="programlisting"><a class="jive-link-anchor-small">ProcessInstance processInstance = executionService.startProcessInstanceByKey("EventListener");</a></pre>
</a></pre><p>In above line getting Nullpointer Exception?</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>can any one help regards this , or any other reference to implement Event Listener in jbpm4</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Thanks all</p></div>
<div style="background-color: #f4f4f4; padding: 10px; margin-top: 20px;">
<p style="margin: 0;">Reply to this message by <a href="http://community.jboss.org/message/569802#569802">going to Community</a></p>
<p style="margin: 0;">Start a new discussion in jBPM at <a href="http://community.jboss.org/choose-container!input.jspa?contentType=1&containerType=14&container=2034">Community</a></p>
</div></td>
</tr>
</tbody>
</table>
</td>
</tr>
</tbody>
</table>
</div>
</body>
</html>