Examples of org.drools.KnowledgeBase

org.drools.KnowledgeBase
The KnowlegeBase is a repository of all the application's knowledge definitions. It will contain rules, processes, functions, type models. The KnowledgeBase itself does not contain data, instead sessions are created from the KnowledgeBase in which data can be inserted and process instances started. Creating the KnowlegeBase can be heavy, where as session creation is very light, so it is recommended that KnowleBase's be cached where possible to allow for repeated session creation. The KnowledgeAgent can be used for this purpose. The KnowledgeBase is created from the KnowledgeBaseFactory, and a KnowledgeBaseConfiguration can be used.
```
 KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase(); 
```
Create sequential KnowledgeBase using the given ClassLoader.
```
 Properties properties = new Properties(); properties.setProperty( "org.drools.sequential", "true"); KnowledgeBaseConfiguration kbConf = KnowledgeBaseFactory.newKnowledgeBaseConfiguration(properties, myClassLoader); KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase(kbConf); 
```
@see org.drools.KnowledgeBaseFactory

        ProcessInstance processInstance = ksession.startProcess("ErrorEndEvent");
    assertProcessInstanceAborted(processInstance.getId(), ksession);
    }


    public void testEscalationEndEventProcess() throws Exception {
        KnowledgeBase kbase = createKnowledgeBase("BPMN2-EscalationEndEvent.bpmn2");
    StatefulKnowledgeSession ksession = createKnowledgeSession(kbase);
        ProcessInstance processInstance = ksession.startProcess("EscalationEndEvent");
    assertProcessInstanceAborted(processInstance.getId(), ksession);
    }

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        ProcessInstance processInstance = ksession.startProcess("EscalationEndEvent");
    assertProcessInstanceAborted(processInstance.getId(), ksession);
    }


    public void testEscalationIntermediateThrowEventProcess() throws Exception {
        KnowledgeBase kbase = createKnowledgeBase("BPMN2-IntermediateThrowEventEscalation.bpmn2");
    StatefulKnowledgeSession ksession = createKnowledgeSession(kbase);
        ProcessInstance processInstance = ksession.startProcess("EscalationIntermediateThrowEvent");
    assertProcessInstanceAborted(processInstance.getId(), ksession);
    }

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        ProcessInstance processInstance = ksession.startProcess("EscalationIntermediateThrowEvent");
    assertProcessInstanceAborted(processInstance.getId(), ksession);
    }


    public void testCompensateIntermediateThrowEventProcess() throws Exception {
        KnowledgeBase kbase = createKnowledgeBase("BPMN2-IntermediateThrowEventCompensate.bpmn2");
    StatefulKnowledgeSession ksession = createKnowledgeSession(kbase);
        ProcessInstance processInstance = ksession.startProcess("CompensateIntermediateThrowEvent");
    assertProcessInstanceCompleted(processInstance.getId(), ksession);
    }

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        ProcessInstance processInstance = ksession.startProcess("CompensateIntermediateThrowEvent");
    assertProcessInstanceCompleted(processInstance.getId(), ksession);
    }


    public void testCompensateEndEventProcess() throws Exception {
        KnowledgeBase kbase = createKnowledgeBase("BPMN2-CompensateEndEvent.bpmn2");
    StatefulKnowledgeSession ksession = createKnowledgeSession(kbase);
        ProcessInstance processInstance = ksession.startProcess("CompensateEndEvent");
    assertProcessInstanceCompleted(processInstance.getId(), ksession);
    }

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        ProcessInstance processInstance = ksession.startProcess("CompensateEndEvent");
    assertProcessInstanceCompleted(processInstance.getId(), ksession);
    }


    public void testServiceTask() throws Exception {
        KnowledgeBase kbase = createKnowledgeBase("BPMN2-ServiceProcess.bpmn2");
    StatefulKnowledgeSession ksession = createKnowledgeSession(kbase);
        ksession.getWorkItemManager().registerWorkItemHandler("Service Task", new ServiceTaskHandler());
        Map<String, Object> params = new HashMap<String, Object>();
        params.put("s", "john");
        WorkflowProcessInstance processInstance = (WorkflowProcessInstance)

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    assertProcessInstanceCompleted(processInstance.getId(), ksession);
        assertEquals("Hello john!", processInstance.getVariable("s"));
    }


    public void testSendTask() throws Exception {
        KnowledgeBase kbase = createKnowledgeBase("BPMN2-SendTask.bpmn2");
    StatefulKnowledgeSession ksession = createKnowledgeSession(kbase);
        ksession.getWorkItemManager().registerWorkItemHandler("Send Task", new SendTaskHandler());
        Map<String, Object> params = new HashMap<String, Object>();
        params.put("s", "john");
        WorkflowProcessInstance processInstance = (WorkflowProcessInstance)

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            ksession.startProcess("SendTask", params);
    assertProcessInstanceCompleted(processInstance.getId(), ksession);
    }


    public void testReceiveTask() throws Exception {
        KnowledgeBase kbase = createKnowledgeBase("BPMN2-ReceiveTask.bpmn2");
    StatefulKnowledgeSession ksession = createKnowledgeSession(kbase);
        ReceiveTaskHandler receiveTaskHandler = new ReceiveTaskHandler(ksession);
        ksession.getWorkItemManager().registerWorkItemHandler("Receive Task", receiveTaskHandler);
        WorkflowProcessInstance processInstance = (WorkflowProcessInstance)
            ksession.startProcess("ReceiveTask");

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//        }
//        assertEquals(5, list.size());
//    }
    
    public void testSignalStart() throws Exception {
        KnowledgeBase kbase = createKnowledgeBase("BPMN2-SignalStart.bpmn2");
    StatefulKnowledgeSession ksession = createKnowledgeSession(kbase);
    final List<Long> list = new ArrayList<Long>();
    ksession.addEventListener(new DefaultProcessEventListener() {
      public void afterProcessStarted(ProcessStartedEvent event) {
        list.add(event.getProcessInstance().getId());

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        ksession.signalEvent("MyStartSignal", "NewValue");
    assertEquals(1, list.size());
    }
    
    public void testSignalEnd() throws Exception {
        KnowledgeBase kbase = createKnowledgeBase("BPMN2-SignalEndEvent.bpmn2");
    StatefulKnowledgeSession ksession = createKnowledgeSession(kbase);
        Map<String, Object> params = new HashMap<String, Object>();
        params.put("x", "MyValue");
        ksession.startProcess("SignalEndEvent", params);
    }

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        params.put("x", "MyValue");
        ksession.startProcess("SignalEndEvent", params);
    }
    
    public void testMessageStart() throws Exception {
        KnowledgeBase kbase = createKnowledgeBase("BPMN2-MessageStart.bpmn2");
    StatefulKnowledgeSession ksession = createKnowledgeSession(kbase);
    final List<Long> list = new ArrayList<Long>();
    ksession.addEventListener(new DefaultProcessEventListener() {
      public void afterProcessStarted(ProcessStartedEvent event) {
        list.add(event.getProcessInstance().getId());

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