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activiti会签多实例例子

在实际的业务中，可能存在存在这么一种情况，当流程运行到某一个环节时，可能需要同时多个人的参与，才可以完成此环节。此时就可以用到activiti的多实例来解决此问题。

一、将一个节点设置成多实例的方法：

要把一个节点设置为多实例，节点xml元素必须设置一个 multiInstanceLoopCharacteristics 子元素。

activiti会签多实例例子当isSequential=true时，表示的顺序执行，即虽然该节点有多条任务，但只有上一条执行完，才可以执行下一条。

当isSequential=false时，表示的并行执行，即该节点下的多条任务可以同时执行。

二、设置会签环节的参与者：

activiti:collection：用于执行该会签环节的参与参与的人，此处是使用的一个名叫pers的流程变量

activiti:elementVariable：此处表示的是每一个分支都有一个名叫per的流程变量，和上方的activiti:assignee结合使用就可以执行该分支应该由谁来处理。

三.指定会签环节的结束条件：

activiti会签多实例例子当画红线的部分返回一个 true 的时候，该会签环节结束。进入下一个流程执行的环节.

completionCondition中写的是juel表达式。其中的mulitiInstance如果是和spring整合了，就是spring管理的bean的id，否则就是流程变量的key.

四、会签环节中涉及的几个默认的流程变量

1.nrOfInstances 该会签环节中总共有多少个实例

nrOfActiveInstances 当前活动的实例的数量，即还没有完成的实例数量。

nrOfCompletedInstances 已经完成的实例的数量

五、代码如下：

1.分配会签环节的人：

/**  * 分配下一环节会签的人  *   * @author huan  *  */ public class AssgineeMultiInstancePer implements JavaDelegate {  @Override  public void execute(DelegateExecution execution) throws Exception {   System.out.println("设置会签环节的人员.");   execution.setVariable("pers", Arrays.asList("张三", "李四", "王五", "赵六"));  } }

2.多实例判断完成的条件：（注意：有于我没有和spring整合，所以此类要实现Serializable接口）

/**  * 多实例完成的条件判断  * @author huan  */ public class MulitiInstanceCompleteTask implements Serializable {  private static final long serialVersionUID = 1L;  public boolean completeTask(DelegateExecution execution) {   System.out.println("总的会签任务数量：" + execution.getVariable("nrOfInstances") + "当前获取的会签任务数量：" + execution.getVariable("nrOfActiveInstances") + " - " + "已经完成的会签任务数量：" + execution.getVariable("nrOfCompletedInstances"));   System.out.println("I am invoked.");   return false;  } }

3.会签环节中的一个监听器：

/**  * 测试会签过程中监听器的执行情况  * @author huan  */ public class TestLinstener implements TaskListener {  private static final long serialVersionUID = -5754522101489239675L;  @Override  public void notify(DelegateTask delegateTask) {   System.out.print(delegateTask.getId() + " - " + delegateTask.getProcessInstanceId() + " - " + delegateTask.getEventName() + " - " + delegateTask.getTaskDefinitionKey());  } }

4.测试代码：

/**  * 测试会签  * @author huan  */ public class TestMultiInstance {  @Test  public void testProcess() {   ProcessEngine processEngine = ProcessEngines.getDefaultProcessEngine();   RepositoryService repositoryService = processEngine.getRepositoryService();   RuntimeService runtimeService = processEngine.getRuntimeService();   TaskService taskService = processEngine.getTaskService();   Deployment deploy = repositoryService.createDeployment()//     .name("会签流程测试")//     .addInputStream("multiInstances.bpmn", this.getClass().getResourceAsStream("multiInstances.bpmn"))//     .addInputStream("multiInstances.png", this.getClass().getResourceAsStream("multiInstances.png"))//     .deploy();   System.out.println(deploy.getId() + " " + deploy.getName());   Map<String, Object> variables = new HashMap<String, Object>();   variables.put("mulitiInstance", new MulitiInstanceCompleteTask());   ProcessInstance pi = runtimeService.startProcessInstanceByKey("multiInstances",variables);   System.out.println(pi.getId() + "  " + pi.getActivityId());   Task task1 = taskService.createTaskQuery().processInstanceId(pi.getId()).taskAssignee("张三").singleResult();   System.out.println(task1.getId() + " - " + task1.getAssignee() + " - " + task1.getProcessInstanceId() + " - " + task1.getProcessDefinitionId());   Task task2 = taskService.createTaskQuery().processInstanceId(pi.getId()).taskAssignee("李四").singleResult();   System.out.println(task2.getId() + " - " + task2.getAssignee() + " - " + task2.getProcessInstanceId() + " - " + task2.getProcessDefinitionId());   Task task3 = taskService.createTaskQuery().processInstanceId(pi.getId()).taskAssignee("王五").singleResult();   System.out.println(task3.getId() + " - " + task3.getAssignee() + " - " + task3.getProcessInstanceId() + " - " + task3.getProcessDefinitionId());   Task task4 = taskService.createTaskQuery().processInstanceId(pi.getId()).taskAssignee("赵六").singleResult();   if (task4 != null) {    System.out.println(task4.getId() + " - " + task4.getAssignee() + " - " + task4.getProcessInstanceId() + " - " + task4.getProcessDefinitionId());   }   Task task5 = taskService.createTaskQuery().processInstanceId(pi.getId()).taskAssignee("钱七").singleResult();   System.out.println(task5);   taskService.complete(task1.getId());   taskService.complete(task2.getId());   taskService.complete(task3.getId());   Task task6 = taskService.createTaskQuery().processInstanceId(pi.getId()).taskAssignee("钱七").singleResult();   System.out.println(task6);   taskService.complete(task4.getId());   Task task7 = taskService.createTaskQuery().processInstanceId(pi.getId()).taskAssignee("钱七").singleResult();   System.out.println(task7);   taskService.complete(task7.getId());   ProcessInstance processInstance = runtimeService.createProcessInstanceQuery().processInstanceId(pi.getId()).singleResult();   if (null == processInstance) {    System.out.println("流程完成.");   }  } }

5.流程文件：

<?xml version="1.0" encoding="UTF-8"?> <definitions xmlns="http://www.omg.org/spec/BPMN/20100524/MODEL" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:activiti="http://activiti.org/bpmn" xmlns:bpmndi="http://www.omg.org/spec/BPMN/20100524/DI" xmlns:omgdc="http://www.omg.org/spec/DD/20100524/DC" xmlns:omgdi="http://www.omg.org/spec/DD/20100524/DI" typeLanguage="http://www.w3.org/2001/XMLSchema" expressionLanguage="http://www.w3.org/1999/XPath" targetNamespace="http://www.activiti.org/test">   <process id="multiInstances" name="流程会签测试" isExecutable="true">     <startEvent id="startevent1" name="Start"></startEvent>     <sequenceFlow id="flow1" sourceRef="startevent1" targetRef="A001"></sequenceFlow>     <serviceTask id="A001" name="设置下一环节的人" activiti:class="com.huan.activiti.liuyang.会签.AssgineeMultiInstancePer"></serviceTask>     <userTask id="B001" name="会签环节" activiti:assignee="${per}">       <extensionElements>         <activiti:taskListener event="complete" class="com.huan.activiti.liuyang.会签.TestLinstener"></activiti:taskListener>       </extensionElements>       <multiInstanceLoopCharacteristics isSequential="false" activiti:collection="pers" activiti:elementVariable="per">         <completionCondition>${mulitiInstance.completeTask(execution)}</completionCondition>       </multiInstanceLoopCharacteristics>     </userTask>     <sequenceFlow id="flow2" sourceRef="A001" targetRef="B001"></sequenceFlow>     <userTask id="C001" name="会签后的环节" activiti:assignee="钱七"></userTask>     <sequenceFlow id="flow3" sourceRef="B001" targetRef="C001"></sequenceFlow>     <endEvent id="endevent1" name="End"></endEvent>     <sequenceFlow id="flow4" sourceRef="C001" targetRef="endevent1"></sequenceFlow>   </process>   <bpmndi:BPMNDiagram id="BPMNDiagram_multiInstances">     <bpmndi:BPMNPlane bpmnElement="multiInstances" id="BPMNPlane_multiInstances">       <bpmndi:BPMNShape bpmnElement="startevent1" id="BPMNShape_startevent1">         <omgdc:Bounds height="35.0" width="35.0" x="100.0" y="240.0"></omgdc:Bounds>       </bpmndi:BPMNShape>       <bpmndi:BPMNShape bpmnElement="A001" id="BPMNShape_A001">         <omgdc:Bounds height="71.0" width="117.0" x="190.0" y="222.0"></omgdc:Bounds>       </bpmndi:BPMNShape>       <bpmndi:BPMNShape bpmnElement="B001" id="BPMNShape_B001">         <omgdc:Bounds height="55.0" width="105.0" x="380.0" y="230.0"></omgdc:Bounds>       </bpmndi:BPMNShape>       <bpmndi:BPMNShape bpmnElement="C001" id="BPMNShape_C001">         <omgdc:Bounds height="55.0" width="105.0" x="561.0" y="230.0"></omgdc:Bounds>       </bpmndi:BPMNShape>       <bpmndi:BPMNShape bpmnElement="endevent1" id="BPMNShape_endevent1">         <omgdc:Bounds height="35.0" width="35.0" x="740.0" y="240.0"></omgdc:Bounds>       </bpmndi:BPMNShape>       <bpmndi:BPMNEdge bpmnElement="flow1" id="BPMNEdge_flow1">         <omgdi:waypoint x="135.0" y="257.0"></omgdi:waypoint>         <omgdi:waypoint x="190.0" y="257.0"></omgdi:waypoint>       </bpmndi:BPMNEdge>       <bpmndi:BPMNEdge bpmnElement="flow2" id="BPMNEdge_flow2">         <omgdi:waypoint x="307.0" y="257.0"></omgdi:waypoint>         <omgdi:waypoint x="380.0" y="257.0"></omgdi:waypoint>       </bpmndi:BPMNEdge>       <bpmndi:BPMNEdge bpmnElement="flow3" id="BPMNEdge_flow3">         <omgdi:waypoint x="485.0" y="257.0"></omgdi:waypoint>         <omgdi:waypoint x="561.0" y="257.0"></omgdi:waypoint>       </bpmndi:BPMNEdge>       <bpmndi:BPMNEdge bpmnElement="flow4" id="BPMNEdge_flow4">         <omgdi:waypoint x="666.0" y="257.0"></omgdi:waypoint>         <omgdi:waypoint x="740.0" y="257.0"></omgdi:waypoint>       </bpmndi:BPMNEdge>     </bpmndi:BPMNPlane>   </bpmndi:BPMNDiagram> </definitions>

7.流程图：

activiti会签多实例例子 如若那个地方写的不对，欢迎指出。