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Confused about JBPM and knowledge agents
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created by <a href="https://community.jboss.org/people/ckuharski">Charlie Kuharski</a> in <i>jBPM Development</i> - <a href="https://community.jboss.org/message/743791#743791">View the full discussion</a>
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<div class="jive-rendered-content"><p>I'm new to this and I'm pretty much confused.  I'm missing some basic concepts.</p><p>I'm trying to interact with the JBPM server at the API level via a proxy.  I don't want the proxy to become the JBPM server.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>1) The code below works:</p><p>// code snippet</p><p class="line" id="LC65" style="padding: 0 0 0 10px;"> <span class="nd">@Test</span></p><p class="line" id="LC66" style="padding: 0 0 0 10px;">    <span class="kd" style="font-weight: bold;">public</span> <span class="kt" style="color: #445588; font-weight: bold;">void</span> <span class="nf" style="color: #990000; font-weight: bold;">simpleExecution</span><span class="o" style="font-weight: bold;">()</span> <span class="o" style="font-weight: bold;">{</span></p><p class="line" id="LC67" style="padding: 0 0 0 10px;">        <span class="n">ProcessInstance</span> <span class="n">processInstance</span> <span class="o" style="font-weight: bold;">=</span> <span class="n">ksession</span><span class="o" style="font-weight: bold;">.</span><span class="na" style="color: #008080;">startProcess</span><span class="o" style="font-weight: bold;">(</span><span class="s" style="color: #dd1144;">"org.jbpm.test"</span><span class="o" style="font-weight: bold;">);</span></p><p class="line" id="LC68" style="padding: 0 0 0 10px;">        <span class="kt" style="color: #445588; font-weight: bold;">long</span> <span class="n">processInstance1Id</span> <span class="o" style="font-weight: bold;">=</span> <span class="n">processInstance</span><span class="o" style="font-weight: bold;">.</span><span class="na" style="color: #008080;">getId</span><span class="o" style="font-weight: bold;">();</span></p><p class="line" id="LC69" style="padding: 0 0 0 10px;">        <span class="n">Assert</span><span class="o" style="font-weight: bold;">.</span><span class="na" style="color: #008080;">assertEquals</span><span class="o" style="font-weight: bold;">(</span><span class="n">ProcessInstance</span><span class="o" style="font-weight: bold;">.</span><span class="na" style="color: #008080;">STATE_ACTIVE</span><span class="o" style="font-weight: bold;">,</span> <span class="n">processInstance</span><span class="o" style="font-weight: bold;">.</span><span class="na" style="color: #008080;">getState</span><span class="o" style="font-weight: bold;">());</span></p><p class="line" id="LC70" style="padding: 0 0 0 10px;">        <span class="n">ksession</span><span class="o" style="font-weight: bold;">.</span><span class="na" style="color: #008080;">signalEvent</span><span class="o" style="font-weight: bold;">(</span><span class="s" style="color: #dd1144;">"continueSignal"</span><span class="o" style="font-weight: bold;">,</span> <span class="kc" style="font-weight: bold;">null</span><span class="o" style="font-weight: bold;">,</span> <span class="n">processInstance1Id</span><span class="o" style="font-weight: bold;">);</span></p><p class="line" id="LC71" style="padding: 0 0 0 10px;">        <span class="n">Assert</span><span class="o" style="font-weight: bold;">.</span><span class="na" style="color: #008080;">assertEquals</span><span class="o" style="font-weight: bold;">(</span><span class="n">ProcessInstance</span><span class="o" style="font-weight: bold;">.</span><span class="na" style="color: #008080;">STATE_COMPLETED</span><span class="o" style="font-weight: bold;">,</span> <span class="n">processInstance</span><span class="o" style="font-weight: bold;">.</span><span class="na" style="color: #008080;">getState</span><span class="o" style="font-weight: bold;">());</span></p><p class="line" id="LC72" style="padding: 0 0 0 10px;">    <span class="o" style="font-weight: bold;">}</span></p><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>1) I'm trying to integrate with an existing application and the consultants ( I believe them) have a project that does the same basic steps but needs persistence.xml local to the project in addition to the persistence.xml on the server.</p><p>/*</p><p>           * Create EntityManagerFactory and register it in the environment Create the</p><p>           * knowledge session that uses JPA to persists runtime state</p><p>           */</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>          public static StatefulKnowledgeSession createSession() throws Exception {</p><p>  </p><p>                    KnowledgeBase kbase = readKnowledgeBase("SimpleHTForm.bpmn2");</p><p>        emf = Persistence.createEntityManagerFactory( "org.jbpm.persistence.jpa" );</p><p>        Environment env = KnowledgeBaseFactory.newEnvironment();</p><p>        env.set( EnvironmentName.ENTITY_MANAGER_FACTORY, emf );</p><p>        env.set( EnvironmentName.TRANSACTION_MANAGER, TransactionManagerServices.getTransactionManager() );</p><p>        env.set( EnvironmentName.GLOBALS, new MapGlobalResolver() );</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>        Properties properties = new Properties();</p><p>        properties.put("drools.processInstanceManagerFactory", "org.jbpm.persistence.processinstance.JPAProcessInstanceManagerFactory");</p><p>        properties.put("drools.processSignalManagerFactory", "org.jbpm.persistence.processinstance.JPASignalManagerFactory");</p><p>        KnowledgeSessionConfiguration config = KnowledgeBaseFactory.newKnowledgeSessionConfiguration(properties);</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>        return JPAKnowledgeService.newStatefulKnowledgeSession(kbase, config, env);</p><p>          }</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>What is this actually doing?  Is this persisting around te JBPM server?  Is the proxy becoming its own JBPM server?  An I really interacting with JBPM or just using the classes locally and saving to the datasource?  See the test example above.  There is no server running for the test.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>I've played with the demos and that makes sense.  Interacting with an existing JBPM is very confusing.</p><p>Any direction would be greatly appreciated.</p></div>
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