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getVariable and setVariable
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created by <a href="https://community.jboss.org/people/minslay">minslay minslay</a> in <i>jBPM</i> - <a href="https://community.jboss.org/message/779611#779611">View the full discussion</a>
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<div class="jive-rendered-content"><p>Hello,</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>I'm newbie with jBPM and I'm stuck with something I think it's easy but it doesn't work.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>I'm trying define a process dynamically with Process API. I want to insert a variable into my actionNode so, I create a HashMap and I use kcontext.getVariable().</p><p>Now I get my variable into my actionNode and I can use it.</p><p>Then I want to modify (or create a new variable) my variable and its value. I don't know how to modify it and use kcontext.setVariable(); also I dont know how to recover that value in my java code.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Here my code</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>    </p><p style="padding-left: 30px;"><span style="font-family: terminal, monaco; font-size: 10pt;">                    HashMap<String, Object> processParameters = new HashMap<String, Object>();</span>  </p><p style="padding-left: 30px;"><span style="font-family: terminal, monaco; font-size: 10pt;">                    KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();</span></p><p style="padding-left: 30px;"><span style="font-family: terminal, monaco; font-size: 10pt;">                    RuleFlowProcessFactory factoryP1 = RuleFlowProcessFactory.createProcess("org.jbpm.Process1");</span></p><p style="padding-left: 30px;">  </p><p style="padding-left: 30px;"><span style="font-family: terminal, monaco; font-size: 10pt;">                    // My variable and value</span></p><p style="padding-left: 30px;"><span style="font-family: terminal, monaco; font-size: 10pt;">                    processParameters.put("result",5);</span></p><p style="padding-left: 30px;">  </p><p style="padding-left: 30px;"><span style="font-family: terminal, monaco; font-size: 10pt;">                    factoryP1.name("Process1").version("1.0").packageName("org.jbpm") </span></p><p style="padding-left: 30px;"><span style="font-family: terminal, monaco; font-size: 10pt;">                              .imports("java.util.HashMap")</span></p><p style="padding-left: 30px;"><span style="font-family: terminal, monaco; font-size: 10pt;"><br/></span></p><p style="padding-left: 30px;"><span style="font-family: terminal, monaco; font-size: 10pt;">                              // creating a new var</span></p><p style="padding-left: 30px;"><span style="font-family: terminal, monaco; font-size: 10pt;">                              .variable("resultReceived", new ObjectDataType("java.lang.Integer"))</span></p><p style="padding-left: 30px;">  </p><p style="padding-left: 30px;"><span style="font-family: terminal, monaco; font-size: 10pt;">                                        .startNode(1).name("Start").done()</span></p><p style="padding-left: 30px;"><span style="font-family: terminal, monaco; font-size: 10pt;">                                        .actionNode(2).name("Action")</span></p><p style="padding-left: 30px;"><span style="font-family: terminal, monaco; font-size: 10pt;">                                        // I receive my variable from java Code with kcontext.getVariable</span></p><p style="padding-left: 30px;"><span style="font-family: terminal, monaco; font-size: 10pt;">                                        // and modify its value (now:6)</span></p><p style="padding-left: 30px;"><span style="font-family: terminal, monaco; font-size: 10pt;">                                        .action("java",          "resultReceived = (Integer) kcontext.getVariable(\"result\")+1;" +</span></p><p style="padding-left: 30px;"><span style="font-family: terminal, monaco; font-size: 10pt;">                                                            "System.out.println(resultReceived);" +</span></p><p style="padding-left: 30px;"><span style="font-family: terminal, monaco; font-size: 10pt;">                                        // I put my new variable with kcontext.setVariable </span></p><p style="padding-left: 30px;"><span style="font-family: terminal, monaco; font-size: 10pt;">                                                            "kcontext.setVariable(\"resultReceived\", resultReceived);").done()</span></p><p style="padding-left: 30px;"><span style="font-family: terminal, monaco; font-size: 10pt;">                                        // another actionNode.</span></p><p style="padding-left: 30px;"><span style="font-family: terminal, monaco; font-size: 10pt;">                                        .actionNode(3).name("Action")</span></p><p style="padding-left: 30px;"><span style="font-family: terminal, monaco; font-size: 10pt;">                                        .action("java","System.out.println(\"Another Node \");").done()</span></p><p style="padding-left: 30px;"><span style="font-family: terminal, monaco; font-size: 10pt;">                                        .endNode(4).name("End").done()</span></p><p style="padding-left: 30px;"><span style="font-family: terminal, monaco; font-size: 10pt;">                                        // Connections</span></p><p style="padding-left: 30px;"><span style="font-family: terminal, monaco; font-size: 10pt;">                                        .connection(1, 2)</span></p><p style="padding-left: 30px;"><span style="font-family: terminal, monaco; font-size: 10pt;">                                        .connection(2, 3)</span></p><p style="padding-left: 30px;"><span style="font-family: terminal, monaco; font-size: 10pt;">                                        .connection(3, 4);</span></p><p style="padding-left: 30px;">  </p><p style="padding-left: 30px;"><span style="font-family: terminal, monaco; font-size: 10pt;">                    RuleFlowProcess process1 = factoryP1.validate().getProcess(); </span></p><p style="padding-left: 30px;">  </p><p style="padding-left: 30px;"><span style="font-family: terminal, monaco; font-size: 10pt;">                    kbuilder.add(ResourceFactory.newByteArrayResource(</span></p><p style="padding-left: 30px;"><span style="font-family: terminal, monaco; font-size: 10pt;">                                        XmlBPMNProcessDumper.INSTANCE.dump(process1).getBytes()),</span></p><p style="padding-left: 30px;"><span style="font-family: terminal, monaco; font-size: 10pt;">                                        ResourceType.BPMN2);</span></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="padding-left: 30px;"><span style="font-family: terminal, monaco; font-size: 10pt;">                    KnowledgeBase kbase = kbuilder.newKnowledgeBase();</span></p><p style="padding-left: 30px;"><span style="font-family: terminal, monaco; font-size: 10pt;">                    StatefulKnowledgeSession ksession = kbase.newStatefulKnowledgeSession();</span></p><p style="padding-left: 30px;"><span style="font-family: terminal, monaco; font-size: 10pt;">                    ProcessInstance processInstance = ksession.startProcess("org.jbpm.Process1",processParameters);</span></p><p style="padding-left: 30px;">  </p><p style="padding-left: 30px;"><span style="font-family: terminal, monaco; font-size: 10pt;">                    // and now... How can I get resultReceived from actionNode???</span></p></div>
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