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

import org.w3c.dom.Element;


public class SimpleBPMNProcessTest extends JbpmJUnitTestCase {


    public void testMinimalProcess() throws Exception {
    KnowledgeBase kbase = createKnowledgeBase("BPMN2-MinimalProcess.bpmn2");
    StatefulKnowledgeSession ksession = createKnowledgeSession(kbase);
    ProcessInstance processInstance = ksession.startProcess("Minimal");
    assertTrue(processInstance.getState() == ProcessInstance.STATE_COMPLETED);
  }

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    ProcessInstance processInstance = ksession.startProcess("Minimal");
    assertTrue(processInstance.getState() == ProcessInstance.STATE_COMPLETED);
  }


  public void testMinimalProcessWithGraphical() throws Exception {
    KnowledgeBase kbase = createKnowledgeBase("BPMN2-MinimalProcessWithGraphical.bpmn2");
    StatefulKnowledgeSession ksession = createKnowledgeSession(kbase);
    ProcessInstance processInstance = ksession.startProcess("Minimal");
    assertTrue(processInstance.getState() == ProcessInstance.STATE_COMPLETED);
  }

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    ProcessInstance processInstance = ksession.startProcess("Minimal");
    assertTrue(processInstance.getState() == ProcessInstance.STATE_COMPLETED);
  }


  public void testMinimalProcessWithDIGraphical() throws Exception {
    KnowledgeBase kbase = createKnowledgeBase("BPMN2-MinimalProcessWithDIGraphical.bpmn2");
    StatefulKnowledgeSession ksession = createKnowledgeSession(kbase);
    ProcessInstance processInstance = ksession.startProcess("Minimal");
    assertTrue(processInstance.getState() == ProcessInstance.STATE_COMPLETED);
  }

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    ProcessInstance processInstance = ksession.startProcess("Minimal");
    assertTrue(processInstance.getState() == ProcessInstance.STATE_COMPLETED);
  }


  public void testCompositeProcessWithDIGraphical() throws Exception {
    KnowledgeBase kbase = createKnowledgeBase("BPMN2-CompositeProcessWithDIGraphical.bpmn2");
    StatefulKnowledgeSession ksession = createKnowledgeSession(kbase);
    ProcessInstance processInstance = ksession.startProcess("Composite");
    assertTrue(processInstance.getState() == ProcessInstance.STATE_COMPLETED);
  }

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    ProcessInstance processInstance = ksession.startProcess("Composite");
    assertTrue(processInstance.getState() == ProcessInstance.STATE_COMPLETED);
  }


    public void testScriptTask() throws Exception {
    KnowledgeBase kbase = createKnowledgeBase("BPMN2-ScriptTask.bpmn2");
    StatefulKnowledgeSession ksession = createKnowledgeSession(kbase);
    ProcessInstance processInstance = ksession.startProcess("ScriptTask");
    assertTrue(processInstance.getState() == ProcessInstance.STATE_COMPLETED);
  }

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    ProcessInstance processInstance = ksession.startProcess("ScriptTask");
    assertTrue(processInstance.getState() == ProcessInstance.STATE_COMPLETED);
  }


    public void testImport() throws Exception {
    KnowledgeBase kbase = createKnowledgeBase("BPMN2-Import.bpmn2");
    StatefulKnowledgeSession ksession = createKnowledgeSession(kbase);
    ProcessInstance processInstance = ksession.startProcess("Import");
    assertTrue(processInstance.getState() == ProcessInstance.STATE_COMPLETED);
  }

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      for (KnowledgeBuilderError error: kbuilder.getErrors()) {
        System.err.println(error);
      }
      throw new IllegalArgumentException("Errors while parsing knowledge base");
    }
    KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase();
    kbase.addKnowledgePackages(kbuilder.getKnowledgePackages());
    StatefulKnowledgeSession ksession = createKnowledgeSession(kbase);
    List<String> list = new ArrayList<String>();
    ksession.setGlobal("list", list);
    ProcessInstance processInstance = ksession.startProcess("RuleTask");
    assertTrue(processInstance.getState() == ProcessInstance.STATE_ACTIVE);

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    assertTrue(list.size() == 1);
        assertProcessInstanceCompleted(processInstance.getId(), ksession);
  }


    public void testDataObject() throws Exception {
        KnowledgeBase kbase = createKnowledgeBase("BPMN2-DataObject.bpmn2");
    StatefulKnowledgeSession ksession = createKnowledgeSession(kbase);
        Map<String, Object> params = new HashMap<String, Object>();
        params.put("employee", "UserId-12345");
        ProcessInstance processInstance = ksession.startProcess("Evaluation", params);
        assertTrue(processInstance.getState() == ProcessInstance.STATE_COMPLETED);

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        ProcessInstance processInstance = ksession.startProcess("Evaluation", params);
        assertTrue(processInstance.getState() == ProcessInstance.STATE_COMPLETED);
    }


    public void testDataStore() throws Exception {
        KnowledgeBase kbase = createKnowledgeBase("BPMN2-DataStore.xml");
    StatefulKnowledgeSession ksession = createKnowledgeSession(kbase);
        ProcessInstance processInstance = ksession.startProcess("Evaluation");
        Definitions def = (Definitions) processInstance.getProcess().getMetaData().get("Definitions");
        assertNotNull(def.getDataStores());
        assertTrue(def.getDataStores().size() == 1);

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        assertEquals("employeeStore", dataStore.getName());
        assertEquals(String.class.getCanonicalName(), ((ObjectDataType) dataStore.getType()).getClassName());
    }


    public void testAssociation() throws Exception {
      KnowledgeBase kbase = createKnowledgeBase("BPMN2-Association.xml");
    StatefulKnowledgeSession ksession = createKnowledgeSession(kbase);
        ProcessInstance processInstance = ksession.startProcess("Evaluation");
        Definitions def = (Definitions) processInstance.getProcess().getMetaData().get("Definitions");
        assertNotNull(def.getAssociations());
        assertTrue(def.getAssociations().size() == 1);

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