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Re: How to Complete a WorkItem using REST API
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created by <a href="http://community.jboss.org/people/melc">Chris Melas</a> in <i>jBPM</i> - <a href="http://community.jboss.org/message/631386#631386">View the full discussion</a>
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<div class="jive-rendered-content"><p>Hi,</p><p>I'm very glad to have assisted in any way and thank you very much for your kind words.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>If you use jbpm-gwt-console-server then you should use the knowledge session provided by the console-server, as you have noticed.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>At first glance things are not very flexible, but there is a way of extending them in a little dirty approach.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>To understand the context, the jbpm-gwt-console-server provides a REST API by communicating with the jbpm5 API through some integration classes.</p><p>The REST API classes as you have spoted are inside the jbpm-gwt-console-server.war and the integration classes are in org.jbpm.integration.console package of the jbpm5 sources. So in your case inside ProcessMgmtFacade (from the REST API) there is a field processManagement of type org.jboss.bpm.console.server.integration.ProcessManagement, which has another field called delegate of type org.jbpm.integration.console.Delegate. The delegate field initialises all jbpm5 knowledge related objects, such as the ksession (StatefulKnowledgeSession). So this is what you need....</p><p>The proble is that it's private and all accessors are either private or not really what we could use to extend and somehow get hold of delegate and ksession etc.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>So the approaches are,</p><p>1. Edit the other classes , or inherit from them (i.e. the integration classes) and expose the field/methods that would provide what is needed. Then provide the new implementations in the already edited ProcessMgmtFacade .</p><p>2. Create your own implementation/use of all i.e. your own web services, instantiated as in jbpm-gwt-console-server etc so in other words create your own little system with jbpm-gwt-console-server as a reference implementation.</p><p>3. Use the dirty old reflection in an inappropriate manner .... as i show below <span> :) </span>  </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>So the dirty approach is to use reflection accessing private method/fields <span> :0 </span></p><p>i.e.</p><p>//inside ProcessMgmtFacade in your web method (this is the idea, haven't tested this code i write it here directly....)</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Field fields[] =this.getClass().getDeclaredFields();</p><p>for(Field field : fields){</p><p>if(field.getName().equals("delegate")){</p><p>field.setAccessible(true);</p><p>field.get(this);//this will return the delegate object, so you can do the same to retrieve the ksession field</p><p>}</p><p>}</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Generally, if there is no other way of doing it properly i.e. via inheritance, or accessing some other object that will eventually give access to ksession , then the author of this code did not intend to give such access and one has to provide his own implementation, possibly by reusing code etc as stated in approaches 1 and 2.</p></div>
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