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JBPM and Webservice call with callback - please advise
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created by <a href="https://community.jboss.org/people/mvermand">mvermand</a> in <i>jBPM</i> - <a href="https://community.jboss.org/message/766579#766579">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'm quite new to JBPM5, though have worked quite a lot with JBPM4.4.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>We are investigating if we can switch to JBPM5.</p><p>I need to create a Task in a bpmn flow that sends a message to an external webservice.</p><p>Lets call this Task-A.</p><p>Moreover, the external party must respond (async) within a definable time (for example 1 hour or 1 day...)</p><p>Only if the external party responds within this time period,Task-A can be completed and the next task can be started.</p><p>Else a different (error-reporting/fallback) task should be started.</p><p>If no response arrived in time, Task-A should be marked as terminated/obsolete(?) so in case a response of the external party arrives afterwards, this has no effect anymore.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Can you give me any ideas in how to accomplish this?</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><span style="text-decoration: underline;">Challenge 1: Creating a callback to complete the Task-A:</span></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>I found something similar (I think) in an example called "PersistentEmergencyServiceProcess", though</p><p>I'm not sure it is a good staring point since:</p><p>1) this handles about human tasks</p><p>2) it has an ActiveWorkItemService.java class which states:</p><p> * This class doesn't support ksession crashes. The ksession passed to its </p><p> * constructor must leave through all the process execution.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>==> what if the server get's restarted within the life-span of 1 hour or 1 day?</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><span style="text-decoration: underline;">Challenge 2: Creating a duedate/timeout on the Task-A:</span></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>In JBPM4.4 it is quite easy to set a timer (duedate) on a task.</p><p>How can this be done in JBPM5?</p><p>I do not see such property on a Task in the JBPM Editor.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><span style="text-decoration: underline;">Challenge 3: How to call an external webservice:</span></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Are there any available helper-classes to easely achieve this?</p><p>Or should I just generate POJO from a WSDL and call this code from a bean?</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Any advice will be greatly appreciated!</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Michiel</p></div>
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