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

        vars.put( docVar, object );
        // for now will have to assume the recipient is a User, we need to figure out if Groups have an alias
        // of if we list all the individuals in the gruop.
        for ( OrganizationalEntity recipient : recipients  ) {
            vars.put( "user", recipient );
            WorkItem workItem = (WorkItem) MVEL.executeExpression( expr, vars );
            workItemHandler.executeWorkItem( workItem, workItemManager );
        }

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        TestWorkItemHandler workItemHandler = new TestWorkItemHandler();
        ksession.getWorkItemManager().registerWorkItemHandler("Human Task", workItemHandler);
        ProcessInstance processInstance = ksession.startProcess("UserTask");
        assertTrue(processInstance.getState() == ProcessInstance.STATE_ACTIVE);
        ksession = restoreSession(ksession, true);
        WorkItem workItem = workItemHandler.getWorkItem();
        assertNotNull(workItem);
        assertEquals("john", workItem.getParameter("ActorId"));
        ksession.getWorkItemManager().completeWorkItem(workItem.getId(), null);
        assertProcessInstanceCompleted(processInstance.getId(), ksession);
    }

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        ksession.getWorkItemManager().registerWorkItemHandler("Human Task", workItemHandler);
        ProcessInstance processInstance = ksession.startProcess("UserTask");
        assertTrue(processInstance.getState() == ProcessInstance.STATE_ACTIVE);
        ksession = restoreSession(ksession, true);
        ksession.getWorkItemManager().registerWorkItemHandler("Human Task", workItemHandler);
        WorkItem workItem = workItemHandler.getWorkItem();
        assertNotNull(workItem);
        assertEquals("john", workItem.getParameter("ActorId"));
        Map<String, Object> results = new HashMap<String, Object>();
        results.put("ActorId", "mary");
        ksession.getWorkItemManager().completeWorkItem(workItem.getId(), results);
        ksession = restoreSession(ksession, true);
        ksession.getWorkItemManager().registerWorkItemHandler("Human Task", workItemHandler);
        workItem = workItemHandler.getWorkItem();
        assertNotNull(workItem);
        assertEquals("mary", workItem.getParameter("ActorId"));
        ksession.getWorkItemManager().completeWorkItem(workItem.getId(), null);
        assertProcessInstanceCompleted(processInstance.getId(), ksession);
    }

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    StatefulKnowledgeSession ksession = createKnowledgeSession(kbase);
        TestWorkItemHandler workItemHandler = new TestWorkItemHandler();
        ksession.getWorkItemManager().registerWorkItemHandler("Human Task", workItemHandler);
        ProcessInstance processInstance = ksession.startProcess("AdHocSubProcess");
        assertTrue(processInstance.getState() == ProcessInstance.STATE_ACTIVE);
        WorkItem workItem = workItemHandler.getWorkItem();
        assertNull(workItem);
        ksession = restoreSession(ksession, true);
        ksession.getWorkItemManager().registerWorkItemHandler("Human Task", workItemHandler);
        ksession.fireAllRules();
        System.out.println("Signaling Hello2");
        ksession.signalEvent("Hello2", null, processInstance.getId());
        workItem = workItemHandler.getWorkItem();
        assertNotNull(workItem);
        ksession = restoreSession(ksession, true);
        ksession.getWorkItemManager().registerWorkItemHandler("Human Task", workItemHandler);
        ksession.getWorkItemManager().completeWorkItem(workItem.getId(), null);
    }

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    StatefulKnowledgeSession ksession = createKnowledgeSession(kbase);
        TestWorkItemHandler workItemHandler = new TestWorkItemHandler();
        ksession.getWorkItemManager().registerWorkItemHandler("Human Task", workItemHandler);
        ProcessInstance processInstance = ksession.startProcess("AdHocSubProcess");
        assertTrue(processInstance.getState() == ProcessInstance.STATE_ACTIVE);
        WorkItem workItem = workItemHandler.getWorkItem();
        assertNull(workItem);
        ksession = restoreSession(ksession, true);
        ksession.getWorkItemManager().registerWorkItemHandler("Human Task", workItemHandler);
        ksession.fireAllRules();
        workItem = workItemHandler.getWorkItem();
        assertNotNull(workItem);
        ksession = restoreSession(ksession, true);
        ksession.getWorkItemManager().registerWorkItemHandler("Human Task", workItemHandler);
        ksession.getWorkItemManager().completeWorkItem(workItem.getId(), null);
    assertProcessInstanceCompleted(processInstance.getId(), ksession);
    }

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        }
        reloadWorkItemsList(actor);
    }
    
    private void select() {
        WorkItem workItem = getSelectedWorkItem();
        if (workItem != null) {
            HumanTaskDialog dialog = new HumanTaskDialog(HumanTaskHandler.this, workItem);
            dialog.setVisible(true);
        }
    }

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    }
    
    private void reloadWorkItemsList(String actor) {
        List<WorkItemWrapper> result = new ArrayList<WorkItemWrapper>();
        for (Iterator<WorkItem> iterator = workItems.keySet().iterator(); iterator.hasNext(); ) {
            WorkItem workItem = iterator.next();
            if (actor == null
                    || workItem.getParameter("ActorId") == null 
                    || actor.equals(workItem.getParameter("ActorId"))) {
                result.add(new WorkItemWrapper(workItem));
            }
        }
        workItemsList.setListData(result.toArray());
    }

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        c.insets = new Insets(5, 5, 5, 5);
        panel.add(selectButton, c);
    }
    
    private void select() {
        WorkItem workItem = getSelectedWorkItem();
        if (workItem != null) {
            UIWorkItemHandlerDialog dialog = new UIWorkItemHandlerDialog(UIWorkItemHandler.this, workItem);
            dialog.setVisible(true);
        }
    }

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    }
    
    private void reloadWorkItemsList() {
        List<WorkItemWrapper> result = new ArrayList<WorkItemWrapper>();
        for (Iterator<WorkItem> iterator = workItems.keySet().iterator(); iterator.hasNext(); ) {
            WorkItem workItem = iterator.next();
            result.add(new WorkItemWrapper(workItem));
        }
        workItemsList.setListData(result.toArray());
    }

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    public void readWorkItems(MarshallerReaderContext context) throws IOException {
        InternalWorkingMemory wm = context.wm;
        ObjectInputStream stream = context.stream;
        while ( stream.readShort() == PersisterEnums.WORK_ITEM ) {
            WorkItem workItem = readWorkItem( context );
            ((WorkItemManager) wm.getWorkItemManager()).internalAddWorkItem( (org.drools.process.instance.WorkItem) workItem );
        }
    }

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