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Use rule to decide flow of process
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created by <a href="https://community.jboss.org/people/mylos78">Mylos Kathos</a> in <i>jBPM</i> - <a href="https://community.jboss.org/message/817402#817402">View the full discussion</a>
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<div class="jive-rendered-content"><p>Hi all !</p><p>I'm trying to integrate some Drool Rules in a simple process. Basically I'm creating an user class which has some properties:</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><span style="font-family: courier new,courier;">User user = new User("George",50);</span></p><p>      </p><p><span style="font-family: courier new,courier;">Map<String, Object> params = new HashMap<String, Object>();</span></p><p><span style="font-family: courier new,courier;">params.put("user", user);</span></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><span style="font-family: courier new,courier;">ProcessInstance processInstance = ksession.createProcessInstance("DemoProcess", params);</span></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><span style="font-family: courier new,courier;">ksession.insert(processInstance);</span></p><p><span style="font-family: courier new,courier;">ksession.insert(user);</span></p><p><span style="font-family: courier new,courier;">ksession.startProcessInstance(processInstance.getId());</span></p><p><span style="font-family: courier new,courier;">ksession.fireAllRules();</span></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>When the process is started, there is a Gateway with the following rule in it:</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><span style="font-family: courier new,courier;">                 --------- Node X</span></p><p><span style="font-family: courier new,courier;">[Start] -----X</span></p><p><span style="font-family: courier new,courier;">                 --------- Node Y</span></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>The Rules in the Gateway(X) are:</p><p><span style="font-family: courier new,courier;">user.IsAdult   -->Go to Node X</span></p><p><span style="font-family: courier new,courier;">!user.IsAdult  -->Go to Node Y</span></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>The problem is that the condition is <strong>always evaluated to Y</strong> because the Rule that sets isAdult seems to be evaluated later (when the process already passed that Gateway)</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><span style="font-family: courier new,courier;">rule "check user"</span></p><p><span style="font-family: courier new,courier;">   no-loop</span></p><p><span style="font-family: courier new,courier;">when</span></p><p><span style="font-family: courier new,courier;">$p: User( age > 18)</span></p><p><span style="font-family: courier new,courier;">$pi: WorkflowProcessInstanceImpl($user: variables['user']) </span></p><p><span style="font-family: courier new,courier;">then</span></p><p><span style="font-family: courier new,courier;">$p.setIsAdult(true);</span></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><span style="font-family: courier new,courier;">$pi.setVariable("user", $p);</span></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><span style="font-family: courier new,courier;">update($p);</span></p><p><span style="font-family: courier new,courier;">end</span></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Is there something I am missing in my process ????</p><p>Thanks a lot</p><p>Mylos</p></div>
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<p style="margin: 0;">Reply to this message by <a href="https://community.jboss.org/message/817402#817402">going to Community</a></p>
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