Examples of org.drools.runtime.StatefulKnowledgeSession

org.drools.runtime.StatefulKnowledgeSession
a global hibernate session, that can be used for DB interactions in the rules. for( Object fact : facts ) { ksession.insert( fact ); } ksession.fireAllRules(); // this will now execute and will be able to resolve the "hbnSession" identifier. ksession.dispose();
Like StatelessKnowledgeSession this also implements CommandExecutor which can be used to script a StatefulKnowledgeSession. See CommandExecutor for more details.
@see org.drools.runtime.Globals

                             ksession );
        final byte[] b1 = bos.toByteArray();
        bos.close();


        ByteArrayInputStream bais = new ByteArrayInputStream( b1 );
        StatefulKnowledgeSession ksession2 = marshaller.unmarshall( bais,
                                                                    new SessionConfiguration(),
                                                                    EnvironmentFactory.newEnvironment() );
        bais.close();


        bos = new ByteArrayOutputStream();

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        }).start();
    
        session.startProcess("com.sample.ruleflow", null);
        assertEquals(1, session.getProcessInstances().size());
        
        StatefulKnowledgeSession ksession = new StatefulKnowledgeSessionImpl( (ReteooWorkingMemory) session );
        Marshaller marshaller = MarshallerFactory.newMarshaller( ksession.getKnowledgeBase() );
     


        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        marshaller.marshall( baos, ksession );
        byte[] b1 = baos.toByteArray();

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    public void testSingleActionNode() throws Exception {                
        KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();
        kbuilder.add( new ClassPathResource( "ActionNodeTest.xml", ActionNodeTest.class ), ResourceType.DRF );
        KnowledgeBase kbase = kbuilder.newKnowledgeBase();
        
        StatefulKnowledgeSession ksession = kbase.newStatefulKnowledgeSession();
        List<String> list = new ArrayList<String>();
        ksession.setGlobal( "list", list );
        
        ksession.startProcess( "process name" );
        
        assertEquals( 1, list.size() );
        assertEquals( "action node was here", list.get(0) );        
    }

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//        RuleBaseConfiguration config = new RuleBaseConfiguration();
//        config.setRuleBaseUpdateHandler(null);


        KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase();
        kbase.addKnowledgePackages( builder.getKnowledgePackages() );
        StatefulKnowledgeSession session = kbase.newStatefulKnowledgeSession();


        List<String> list = new ArrayList<String>();
        session.setGlobal( "list", list );


        Person p = new Person( "bobba fet", 32);
        session.insert( p );
        ProcessInstance processInstance = ( ProcessInstance ) session.startProcess("org.test.ruleflow");
        
        assertEquals(1, session.getProcessInstances().size());
        
        String process2 = 
            "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" +
            "<process xmlns=\"http://drools.org/drools-5.0/process\"\n" +
            "    xmlns:xs=\"http://www.w3.org/2001/XMLSchema-instance\"\n" +
            "    xs:schemaLocation=\"http://drools.org/drools-5.0/process drools-processes-5.0.xsd\"\n" +
            "    type=\"RuleFlow\" name=\"ruleflow\" id=\"org.test.ruleflow2\" package-name=\"org.test\" >\n" +
            "  <header>\n" +
            "    <globals>\n" +
            "      <global identifier=\"list\" type=\"java.util.List\" />\n" +
            "    </globals>\n" +
            "  </header>\n" +
            "  <nodes>\n" +
            "    <start id=\"1\" name=\"Start\" />\n" +
            "    <ruleSet id=\"2\" name=\"Hello\" ruleFlowGroup=\"hello\" />\n" +
            "    <actionNode id=\"4\" name=\"Action\" >" +
            "      <action type=\"expression\" dialect=\"java\">System.out.println();\n" +
            "list.add(\"Executed\");</action>\n" +
            "    </actionNode>\n" + 
            "    <end id=\"3\" name=\"End\" />\n" +
            "  </nodes>\n" +
            "  <connections>\n" +
            "    <connection from=\"1\" to=\"2\"/>\n" +
            "    <connection from=\"2\" to=\"4\"/>\n" +
            "    <connection from=\"4\" to=\"3\"/>\n" +
            "  </connections>\n" +
            "</process>";
        builder = KnowledgeBuilderFactory.newKnowledgeBuilder();
        builder.add( new ReaderResource( new StringReader( process2 )), ResourceType.DRF );
        kbase.addKnowledgePackages( builder.getKnowledgePackages() );
        
        WorkflowProcessInstanceUpgrader.upgradeProcessInstance(
            session, processInstance.getId(), "org.test.ruleflow2", new HashMap<String, Long>());
        assertEquals("org.test.ruleflow2", processInstance.getProcessId());
        
        session.fireAllRules();
        
        assertEquals(2, list.size());
        assertEquals(ProcessInstance.STATE_COMPLETED, processInstance.getState());
    }

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//      RuleBaseConfiguration config = new RuleBaseConfiguration();
//      config.setRuleBaseUpdateHandler(null);


        KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase();
        kbase.addKnowledgePackages( builder.getKnowledgePackages() );
        StatefulKnowledgeSession session = kbase.newStatefulKnowledgeSession();


        List<String> list = new ArrayList<String>();
        session.setGlobal( "list", list );


        Person p = new Person( "bobba fet", 32);
        session.insert( p );
        ProcessInstance processInstance = ( ProcessInstance ) session.startProcess("org.test.ruleflow");
        
        assertEquals(1, session.getProcessInstances().size());
        
        String process2 = 
            "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" +
            "<process xmlns=\"http://drools.org/drools-5.0/process\"\n" +
            "    xmlns:xs=\"http://www.w3.org/2001/XMLSchema-instance\"\n" +
            "    xs:schemaLocation=\"http://drools.org/drools-5.0/process drools-processes-5.0.xsd\"\n" +
            "    type=\"RuleFlow\" name=\"ruleflow\" id=\"org.test.ruleflow2\" package-name=\"org.test\" >\n" +
            "  <header>\n" +
            "    <globals>\n" +
            "      <global identifier=\"list\" type=\"java.util.List\" />\n" +
            "    </globals>\n" +
            "  </header>\n" +
            "  <nodes>\n" +
            "    <start id=\"1\" name=\"Start\" />\n" +
            "    <ruleSet id=\"102\" name=\"Hello\" ruleFlowGroup=\"hello\" />\n" +
            "    <actionNode id=\"4\" name=\"Action\" >" +
            "      <action type=\"expression\" dialect=\"java\">System.out.println();\n" +
            "list.add(\"Executed\");</action>\n" +
            "    </actionNode>\n" + 
            "    <end id=\"3\" name=\"End\" />\n" +
            "  </nodes>\n" +
            "  <connections>\n" +
            "    <connection from=\"1\" to=\"102\"/>\n" +
            "    <connection from=\"102\" to=\"4\"/>\n" +
            "    <connection from=\"4\" to=\"3\"/>\n" +
            "  </connections>\n" +
            "</process>";
        builder = KnowledgeBuilderFactory.newKnowledgeBuilder();
        builder.add( new ReaderResource( new StringReader( process2 )), ResourceType.DRF );
        kbase.addKnowledgePackages( builder.getKnowledgePackages() );
        
        Map<String, Long> mapping = new HashMap<String, Long>();
        mapping.put("2", 102L);
        
        WorkflowProcessInstanceUpgrader.upgradeProcessInstance(
            session, processInstance.getId(), "org.test.ruleflow2", mapping);
        assertEquals("org.test.ruleflow2", processInstance.getProcessId());
        
        session.fireAllRules();
        
        assertEquals(2, list.size());
        assertEquals(ProcessInstance.STATE_COMPLETED, processInstance.getState());
    }

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//      RuleBaseConfiguration config = new RuleBaseConfiguration();
//      config.setRuleBaseUpdateHandler(null);


        KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase();
        kbase.addKnowledgePackages( builder.getKnowledgePackages() );
        StatefulKnowledgeSession session = kbase.newStatefulKnowledgeSession();


        List<String> list = new ArrayList<String>();
        session.setGlobal( "list", list );


        Person p = new Person( "bobba fet", 32);
        session.insert( p );
        ProcessInstance processInstance = ( ProcessInstance ) session.startProcess("org.test.ruleflow");
        
        assertEquals(1, session.getProcessInstances().size());
        
        String process2 = 
            "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" +
            "<process xmlns=\"http://drools.org/drools-5.0/process\"\n" +
            "    xmlns:xs=\"http://www.w3.org/2001/XMLSchema-instance\"\n" +
            "    xs:schemaLocation=\"http://drools.org/drools-5.0/process drools-processes-5.0.xsd\"\n" +
            "    type=\"RuleFlow\" name=\"ruleflow\" id=\"org.test.ruleflow2\" package-name=\"org.test\" >\n" +
            "  <header>\n" +
            "    <globals>\n" +
            "      <global identifier=\"list\" type=\"java.util.List\" />\n" +
            "    </globals>\n" +
            "  </header>\n" +
            "  <nodes>\n" +
            "    <start id=\"1\" name=\"Start\" />\n" +
            "    <composite id=\"2\" name=\"Composite\" >\n" +
            "      <nodes>\n" +
            "        <ruleSet id=\"101\" name=\"Hello\" ruleFlowGroup=\"hello\" />\n" +
            "        <actionNode id=\"2\" name=\"Action\" >" +
            "          <action type=\"expression\" dialect=\"java\">System.out.println();\n" +
            "list.add(\"Executed\");</action>\n" +
            "        </actionNode>\n" + 
            "      </nodes>\n" +
            "      <connections>\n" +
            "        <connection from=\"101\" to=\"2\"/>\n" +
            "      </connections>\n" +
            "      <in-ports>\n" +
            "        <in-port type=\"DROOLS_DEFAULT\" nodeId=\"101\" nodeInType=\"DROOLS_DEFAULT\" />\n" +
            "      </in-ports>\n" +
            "      <out-ports>\n" +
            "        <out-port type=\"DROOLS_DEFAULT\" nodeId=\"2\" nodeOutType=\"DROOLS_DEFAULT\" />\n" +
            "      </out-ports>\n" +
            "    </composite>\n" +
            "    <end id=\"3\" name=\"End\" />\n" +
            "  </nodes>\n" +
            "  <connections>\n" +
            "    <connection from=\"1\" to=\"2\"/>\n" +
            "    <connection from=\"2\" to=\"3\"/>\n" +
            "  </connections>\n" +
            "</process>";
        builder = KnowledgeBuilderFactory.newKnowledgeBuilder();
        builder.add( new ReaderResource( new StringReader( process2 )), ResourceType.DRF );
        kbase.addKnowledgePackages( builder.getKnowledgePackages() );
        
        Map<String, Long> mapping = new HashMap<String, Long>();
        mapping.put("2:1", 101L);
        
        WorkflowProcessInstanceUpgrader.upgradeProcessInstance(
            session, processInstance.getId(), "org.test.ruleflow2", mapping);
        assertEquals("org.test.ruleflow2", processInstance.getProcessId());
        
        session.fireAllRules();
        
        assertEquals(2, list.size());
        assertEquals(ProcessInstance.STATE_COMPLETED, processInstance.getState());
    }

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            "  </connections>\n" +
            "\n" +
            "</process>");
        kbuilder.add(new ReaderResource(source), ResourceType.DRF);
        KnowledgeBase kbase = kbuilder.newKnowledgeBase();
        StatefulKnowledgeSession ksession = kbase.newStatefulKnowledgeSession();
        TestWorkItemHandler handler = new TestWorkItemHandler();
        ksession.getWorkItemManager().registerWorkItemHandler("Human Task", handler);
        List<String> list = new ArrayList<String>();
        ksession.setGlobal("list", list);
        ProcessInstance processInstance =
            ksession.startProcess("org.drools.actions");
        assertEquals(ProcessInstance.STATE_ACTIVE, processInstance.getState());
        WorkItem workItem = handler.getWorkItem();
        assertNotNull(workItem);
        assertEquals(1, list.size());
        ksession.getWorkItemManager().completeWorkItem(workItem.getId(), null);
        assertEquals(3, list.size());
        assertEquals(ProcessInstance.STATE_COMPLETED, processInstance.getState());
    }

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            "  </connections>\n" +
            "\n" +
            "</process>");
        kbuilder.add(new ReaderResource(source), ResourceType.DRF);
        KnowledgeBase kbase = kbuilder.newKnowledgeBase();
        StatefulKnowledgeSession ksession = kbase.newStatefulKnowledgeSession();
        List<String> list = new ArrayList<String>();
        ksession.setGlobal("list", list);
        ProcessInstance processInstance =
            ksession.startProcess("org.drools.actions");
        assertEquals(2, list.size());
        assertEquals("SomeText", list.get(0));
        assertEquals("MyActionNode", list.get(1));
        Collection<FactHandle> factHandles = ksession.getFactHandles(new ObjectFilter() {
      public boolean accept(Object object) {
        return object instanceof Message;
      }
        });
        assertFalse(factHandles.isEmpty());

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        kbuilder.add(new ReaderResource(source), ResourceType.DRF);
        if ( kbuilder.hasErrors() ) {
            fail( kbuilder.getErrors().toString() );
        }
        KnowledgeBase kbase = kbuilder.newKnowledgeBase();
        StatefulKnowledgeSession ksession = kbase.newStatefulKnowledgeSession();
        List<String> list = new ArrayList<String>();
        ksession.setGlobal("list", list);
        ProcessInstance processInstance =
            ksession.startProcess("org.drools.actions");
        assertEquals(2, list.size());
        assertEquals("SomeText", list.get(0));
        assertEquals("MyActionNode", list.get(1));
        Collection<FactHandle> factHandles = ksession.getFactHandles(new ObjectFilter() {
      public boolean accept(Object object) {
        return object instanceof Message;
      }
        });
        assertFalse(factHandles.isEmpty());

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            "  </connections>\n" +
            "\n" +
            "</process>");
        kbuilder.add(new ReaderResource(source), ResourceType.DRF);
        KnowledgeBase kbase = kbuilder.newKnowledgeBase();
        StatefulKnowledgeSession ksession = kbase.newStatefulKnowledgeSession();
        List<String> list = new ArrayList<String>();
        ksession.setGlobal("list", list);
        TestVariable person = new TestVariable("John Doe");
        Map<String, Object> params = new HashMap<String, Object>();
        params.put("person", person);
        ProcessInstance processInstance =
            ksession.startProcess("org.drools.actions", params);
        assertEquals(1, list.size());
        assertEquals("John Doe", list.get(0));
        assertEquals(ProcessInstance.STATE_COMPLETED, processInstance.getState());
    }

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