Examples of org.drools.runtime.process.WorkItem

org.drools.runtime.process.WorkItem
Represents one unit of work that needs to be executed. It contains all the information that it necessary to execute this unit of work as parameters, and (possibly) results related to its execution. WorkItems represent a unit of work in an abstract, high-level and implementation-independent manner. They are created by the engine whenever an external task needs to be performed. The engine will delegate the work item to the appropriate WorkItemHandler for execution. Whenever a work item is completed (or whenever the work item cannot be executed and should be aborted), the work item manager should be notified. For example, a work item could be created whenever an email needs to be sent. This work item would have a name that represents the type of work that needs to be executed (e.g. "Email") and parameters related to its execution (e.g. "From" = "me@mail.com", "To" = ..., "Body" = ..., ...). Result parameters can contain results related to the execution of this work item (e.g. "Success" = true). @see org.drools.runtime.process.WorkItemHandler @see org.drools.runtime.process.WorkItemManager

        RuleFlowProcessInstance processInstance = (RuleFlowProcessInstance) service.execute( startProcessCommand );
        log.info( "Started process instance {}", processInstance.getId() );
        long processInstanceId = processInstance.getId();


        TestWorkItemHandler handler = TestWorkItemHandler.getInstance();
        WorkItem workItem = handler.getWorkItem();
        assertNotNull( workItem );
        service.dispose();


        service = jpaService.loadStatefulKnowledgeSession(sessionId);
        GetProcessInstanceCommand getProcessInstanceCommand = new GetProcessInstanceCommand();
        getProcessInstanceCommand.setProcessInstanceId( processInstanceId );
        processInstance = (RuleFlowProcessInstance) service.execute( getProcessInstanceCommand );
        assertNotNull( processInstance );


        Collection<NodeInstance> nodeInstances = processInstance.getNodeInstances();
        assertEquals( 1,
                      nodeInstances.size() );
        SubProcessNodeInstance subProcessNodeInstance = (SubProcessNodeInstance) nodeInstances.iterator().next();
        long subProcessInstanceId = subProcessNodeInstance.getProcessInstanceId();
        getProcessInstanceCommand = new GetProcessInstanceCommand();
        getProcessInstanceCommand.setProcessInstanceId( subProcessInstanceId );
        RuleFlowProcessInstance subProcessInstance = (RuleFlowProcessInstance) service.execute( getProcessInstanceCommand );
        assertNotNull( subProcessInstance );
        service.dispose();


        service = jpaService.loadStatefulKnowledgeSession(sessionId);
        CompleteWorkItemCommand completeWorkItemCommand = new CompleteWorkItemCommand();
        completeWorkItemCommand.setWorkItemId( workItem.getId() );
        service.execute( completeWorkItemCommand );
        service.dispose();


        service = jpaService.loadStatefulKnowledgeSession(sessionId);
        getProcessInstanceCommand = new GetProcessInstanceCommand();

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        startProcessCommand.setParameters(parameters);
        WorkflowProcessInstance processInstance = (WorkflowProcessInstance) service.execute( startProcessCommand );
        log.info( "Started process instance {}", processInstance.getId() );
    
        TestWorkItemHandler handler = TestWorkItemHandler.getInstance();
        WorkItem workItem = handler.getWorkItem();
        assertNotNull( workItem );
        service.dispose();
        
        EntityManagerFactory emf = (EntityManagerFactory) ctx.getBean("myEmf");

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  public void abortWorkItem(WorkItem workItem, WorkItemManager manager) {
  }
  
  public WorkItem getWorkItem() {
    WorkItem result = workItem;
    workItem = null;
    return result;
  }

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        person.setName("John Doe");
        parameters.put("Person", person);
        WorkflowProcessInstance processInstance = (WorkflowProcessInstance)
          ksession.startProcess("org.drools.actions", parameters);
        assertEquals(ProcessInstance.STATE_ACTIVE, processInstance.getState());
        WorkItem workItem = handler.getWorkItem();
        assertNotNull(workItem);
        assertEquals("John Doe", workItem.getParameter("ActorId"));
        assertEquals("John Doe", workItem.getParameter("Content"));
        assertEquals("John Doe", workItem.getParameter("Comment"));
        ksession.getWorkItemManager().completeWorkItem(workItem.getId(), null);
        assertEquals(ProcessInstance.STATE_COMPLETED, processInstance.getState());
        
        parameters = new HashMap<String, Object>();
        parameters.put("UserName", "Jane Doe");
        parameters.put("MyObject", "SomeString");
        person = new Person();
        person.setName("Jane Doe");
        parameters.put("Person", person);
        processInstance = (WorkflowProcessInstance)
          ksession.startProcess("org.drools.actions", parameters);
        assertEquals(ProcessInstance.STATE_ACTIVE, processInstance.getState());
        workItem = handler.getWorkItem();
        assertNotNull(workItem);
        assertEquals("Jane Doe", workItem.getParameter("ActorId"));
        assertEquals("SomeString", workItem.getParameter("Attachment"));
        assertEquals("Jane Doe", workItem.getParameter("Content"));
        assertEquals("Jane Doe", workItem.getParameter("Comment"));
        Map<String, Object> results = new HashMap<String, Object>();
        results.put("Result", "SomeOtherString");
        ksession.getWorkItemManager().completeWorkItem(workItem.getId(), results);
        assertEquals(ProcessInstance.STATE_COMPLETED, processInstance.getState());
        assertEquals("SomeOtherString", processInstance.getVariable("MyObject"));
        assertEquals(15, processInstance.getVariable("Number"));
    }

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        List<String> list = new ArrayList<String>();
        workingMemory.setGlobal("list", list);
        ProcessInstance processInstance = ( ProcessInstance )
            workingMemory.startProcess("org.drools.actions");
        assertEquals(ProcessInstance.STATE_ACTIVE, processInstance.getState());
        WorkItem workItem = handler.getWorkItem();
        assertNotNull(workItem);
        assertEquals(1, list.size());
        workingMemory.getWorkItemManager().completeWorkItem(workItem.getId(), null);
        assertEquals(3, list.size());
        assertEquals(ProcessInstance.STATE_COMPLETED, processInstance.getState());
    }

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        workingMemory.getWorkItemManager().registerWorkItemHandler("Work", testHandler);
        ProcessInstance processInstance = ( ProcessInstance )
            workingMemory.startProcess("org.drools.dynamic");
        assertEquals(ProcessInstance.STATE_ACTIVE, processInstance.getState());
        assertEquals(1, list.size());
        WorkItem workItem = testHandler.getWorkItem(); 
        assertNotNull(workItem);
        workingMemory.getWorkItemManager().completeWorkItem(workItem.getId(), null);
        assertEquals(ProcessInstance.STATE_COMPLETED, processInstance.getState());
        assertEquals(3, list.size());
    }

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        TestWorkItemHandler handler = new TestWorkItemHandler();
        workingMemory.getWorkItemManager().registerWorkItemHandler("Human Task", handler);
        ProcessInstance processInstance = ( ProcessInstance )
            workingMemory.startProcess("org.drools.humantask");
        assertEquals(ProcessInstance.STATE_ACTIVE, processInstance.getState());
        WorkItem workItem = handler.getWorkItem();
        assertNotNull(workItem);
        workingMemory.getWorkItemManager().completeWorkItem(workItem.getId(), null);
        assertEquals(ProcessInstance.STATE_COMPLETED, processInstance.getState());
    }

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        TestWorkItemHandler handler = new TestWorkItemHandler();
        workingMemory.getWorkItemManager().registerWorkItemHandler("Human Task", handler);
        ProcessInstance processInstance = ( ProcessInstance )
            workingMemory.startProcess("org.drools.humantask");
        assertEquals(ProcessInstance.STATE_ACTIVE, processInstance.getState());
        WorkItem workItem = handler.getWorkItem();
        assertNotNull(workItem);
        assertEquals("Do something", workItem.getParameter("TaskName"));
        assertEquals("John Doe", workItem.getParameter("ActorId"));
        Map<String, Object> results = new HashMap<String, Object>();
        results.put("ActorId", "Jane Doe");
        workingMemory.getWorkItemManager().completeWorkItem(workItem.getId(), results);
        workItem = handler.getWorkItem();
        assertNotNull(workItem);
        assertEquals("Do something else", workItem.getParameter("TaskName"));
        assertEquals("Jane Doe", workItem.getParameter("ActorId"));
        workingMemory.getWorkItemManager().completeWorkItem(workItem.getId(), null);
        assertEquals(ProcessInstance.STATE_COMPLETED, processInstance.getState());
    }

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        TestWorkItemHandler handler = new TestWorkItemHandler();
        workingMemory.getWorkItemManager().registerWorkItemHandler("Human Task", handler);
        ProcessInstance processInstance = ( ProcessInstance )
            workingMemory.startProcess("org.drools.humantask");
        assertEquals(ProcessInstance.STATE_ACTIVE, processInstance.getState());
        WorkItem workItem = handler.getWorkItem();
        assertNotNull(workItem);
        processInstance.setState(ProcessInstance.STATE_ABORTED);
        assertTrue(handler.isAborted());
    }

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        TestWorkItemHandler handler = new TestWorkItemHandler();
        workingMemory.getWorkItemManager().registerWorkItemHandler("Human Task", handler);
        ProcessInstance processInstance = ( ProcessInstance )
            workingMemory.startProcess("org.drools.humantask");
        assertEquals(ProcessInstance.STATE_ACTIVE, processInstance.getState());
        WorkItem workItem = handler.getWorkItem();
        assertNotNull(workItem);
        workingMemory.getWorkItemManager().completeWorkItem(workItem.getId(), null);
        assertFalse(handler.isAborted());
    }

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