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<a href="http://community.jboss.org/index.jspa" style="text-decoration: none; color: #E1E1E1">JBoss Community</a></h1>
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Process variables, rules, Gateway constraints
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created by <a href="http://community.jboss.org/people/GaryS">Gary Struthers</a> in <i>jBPM</i> - <a href="http://community.jboss.org/message/616560#616560">View the full discussion</a>
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<div class="jive-rendered-content"><p>I followed <span style="font-size: 12pt;"><a class="jive-link-message-small" href="http://community.jboss.org/message/607839#607839">Accessing process variables in rule-task</a> </span><a class="jive-link-external-small" href="http://community.jboss.org/message/607839#607839#607839" target="_blank">http://community.jboss.org/message/607839#607839</a></p><p>But I'm starting a new thread because I have new problems and that thread was marked as answered.</p><p>I'm missing something important about how to handle variables in rules and constraints but I can't find it.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>A JUnit4 test fails when I call fireAllRules()</p><p style="margin: 0.0px 0.0px 0.0px 0.0px;">org.drools.RuntimeDroolsException: Unexpected exception executing action org.jbpm.process.instance.event.DefaultSignalManager$SignalAction@3e4ac866</p><p style="margin: 0.0px 0.0px 0.0px 0.0px;">          at org.drools.common.AbstractWorkingMemory.executeQueuedActions(AbstractWorkingMemory.java:1000)</p><p style="margin: 0.0px 0.0px 0.0px 0.0px;">          at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:733)</p><p style="margin: 0.0px 0.0px 0.0px 0.0px;">          at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:702)</p><p style="margin: 0.0px 0.0px 0.0px 0.0px;">          at org.drools.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:218)</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="margin: 0.0px 0.0px 0.0px 0.0px; color: #777777;"><span style="color: #000000;">  </span>@Test<span style="color: #000000;"> </span></p><p style="margin: 0.0px 0.0px 0.0px 0.0px;">          <span style="color: #a5006a;">public</span> <span style="color: #a5006a;">void</span> assignApplication() <span style="color: #a5006a;">throws</span> Exception {</p><p style="margin: 0.0px 0.0px 0.0px 0.0px; color: #229571;"><span style="color: #000000;">  </span>// given </p><p style="margin: 0.0px 0.0px 0.0px 0.0px;">                    StatefulKnowledgeSession kSession = createKnowledgeSession(getKbase());</p><p style="margin: 0.0px 0.0px 0.0px 0.0px;">                    String ready = <span style="color: #a5006a;">new</span> String(<span style="color: #4e00ff;">"false"</span>);</p><p style="margin: 0.0px 0.0px 0.0px 0.0px;">                    String assignLHS = <span style="color: #a5006a;">new</span> String(<span style="color: #4e00ff;">"true"</span>);</p><p style="margin: 0.0px 0.0px 0.0px 0.0px;">                    Map<String, Object> params = <span style="color: #a5006a;">new</span> HashMap<String, Object>();</p><p style="margin: 0.0px 0.0px 0.0px 0.0px;">                    params.put(<span style="color: #4e00ff;">"ready"</span>, ready);</p><p style="margin: 0.0px 0.0px 0.0px 0.0px;">                    params.put(<span style="color: #4e00ff;">"assignLHS"</span>, assignLHS);</p><p style="margin: 0.0px 0.0px 0.0px 0.0px;">                    ProcessInstance pi = kSession.startProcess(<span style="color: #4e00ff;">"dummy"</span>, params);</p><p style="margin: 0.0px 0.0px 0.0px 0.0px;">                    <span style="color: #a5006a;">this</span>.assertNodeTriggered(pi.getId(), <span style="color: #4e00ff;">"Start"</span>,<span style="color: #4e00ff;">"AddPiFact"</span>, <span style="color: #4e00ff;">"Assign Application"</span>);</p><p style="margin: 0.0px 0.0px 0.0px 0.0px;">                    kSession.fireAllRules();</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>AddPiFact is a script immediately after Start with this action:</p><p style="margin: 0.0px 0.0px 0.0px 0.0px;"><span style="color: #bc0000;"><strong>import</strong></span> org.drools.runtime.KnowledgeContext</p><p style="margin: 0.0px 0.0px 0.0px 0.0px;"><span style="color: #bc0000;"><strong>import</strong></span> org.drools.runtime.KnowledgeRuntime</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="margin: 0.0px 0.0px 0.0px 0.0px;">kcontext.getKnowledgeRuntime().<span style="color: #bc0000;"><strong>insert</strong></span>(kcontext.getProcessInstance());</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>The rule is supposed to set "ready" if "assignLHS" is true</p><p style="margin: 0.0px 0.0px 0.0px 0.0px;"><span style="color: #bc0000;">import</span> org.drools.runtime.process.WorkflowProcessInstance</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="margin: 0.0px 0.0px 0.0px 0.0px;"> <span style="color: #bc0000;">rule</span><span style="color: #000000;"> </span>"applicationReady"</p><p style="margin: 0.0px 0.0px 0.0px 0.0px; color: #009800;"><span style="color: #000000;">    </span><span style="color: #bc0000;">ruleflow-group</span><span style="color: #000000;"> </span>"assignApplication"</p><p style="margin: 0.0px 0.0px 0.0px 0.0px;">    <span style="color: #bc0000;">when</span></p><p style="margin: 0.0px 0.0px 0.0px 0.0px;">        $process: WorkflowProcessInstance()</p><p style="margin: 0.0px 0.0px 0.0px 0.0px;">        $assignLHS :String() <span style="color: #bc0000;">from</span> (String)$process.getVariable(<span style="color: #009800;">"assignLHS"</span>);</p><p style="margin: 0.0px 0.0px 0.0px 0.0px;">        <span style="color: #bc0000;">eval</span>($assignLHS == <span style="color: #009800;">"true"</span>);</p><p style="margin: 0.0px 0.0px 0.0px 0.0px;">    <span style="color: #bc0000;">then</span></p><p style="margin: 0.0px 0.0px 0.0px 0.0px;">        $process.setVariable(<span style="color: #009800;">"ready"</span>, <span style="color: #009800;">"true"</span>);</p><p style="margin: 0.0px 0.0px 0.0px 0.0px;">        <span style="color: #bc0000;">update</span>($process);</p><p style="margin: 0.0px 0.0px 0.0px 0.0px; color: #bc0000;">end</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>I want an XOR Gateway to use "ready" in its Constraints but if I write it like</p><p>return ready.compareIgnoreCase("true");</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>The KnowledgeBuilder has an error that "ready" can't be resolved.</p></div>
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