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jBpm 4.3 service task has no optional args?
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created by <a href="http://community.jboss.org/people/tstephen">Tim Stephenson</a> in <i>jBPM</i> - <a href="http://community.jboss.org/message/557183#557183">View the full discussion</a>
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<div class="jive-rendered-content"><p>Hi,</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>I've been looking at taskService in a BPMN2 process and I don't seem to be able to define an optional argument. If I define an arg such as:</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>     <jbpm:arg><br/>            <jbpm:object expr="#{cc}" /><br/>     </jbpm:arg></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>but do not have such a variable in the process instance by the time the task is invoked then it fails with the following error:</p><p style="padding-left: 30px;">[DefaultCommandService] exception while executing command org.jbpm.pvm.internal.cmd.CompleteTaskCmd@f4189a<br/>org.jbpm.pvm.internal.wire.WireException: couldn't invoke method doTest: couldn't create argument 3: script evaluation error: javax.el.PropertyNotFoundException: Cannot find property cc<br/>    at org.jbpm.bpmn.flownodes.JavaServiceTaskActivity.perform(JavaServiceTaskActivity.java:94)</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>So it seems all args must exist or am I doing something wrong? I would prefer to handle optional params in my service class. What do you think?</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>thanks in advance, Tim</p></div>
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