Activiti — 动态任务分配

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动态任务分配使用的两种方式

一、通过特殊表达式，来获取任务信息，在流程 UserTask节点上设置 ${流程变量的Key}

1、流程定义

 1 <?xml version="1.0" encoding="UTF-8"?> 2 <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"> 3   <process id="userDynamicTask1" name="动态任务处理1" isExecutable="true"> 4     <startEvent id="startevent1" name="Start"></startEvent> 5     <userTask id="休假" name="休假" activiti:assignee="${user}"></userTask> 6     <sequenceFlow id="flow1" sourceRef="startevent1" targetRef="休假"></sequenceFlow> 7     <endEvent id="endevent1" name="End"></endEvent> 8     <sequenceFlow id="flow2" sourceRef="休假" targetRef="endevent1"></sequenceFlow> 9   </process>10   <bpmndi:BPMNDiagram id="BPMNDiagram_userDynamicTask1">11     <bpmndi:BPMNPlane bpmnElement="userDynamicTask1" id="BPMNPlane_userDynamicTask1">12       <bpmndi:BPMNShape bpmnElement="startevent1" id="BPMNShape_startevent1">13         <omgdc:Bounds height="35.0" width="35.0" x="340.0" y="110.0"></omgdc:Bounds>14       </bpmndi:BPMNShape>15       <bpmndi:BPMNShape bpmnElement="休假" id="BPMNShape_休假">16         <omgdc:Bounds height="55.0" width="105.0" x="305.0" y="180.0"></omgdc:Bounds>17       </bpmndi:BPMNShape>18       <bpmndi:BPMNShape bpmnElement="endevent1" id="BPMNShape_endevent1">19         <omgdc:Bounds height="35.0" width="35.0" x="340.0" y="270.0"></omgdc:Bounds>20       </bpmndi:BPMNShape>21       <bpmndi:BPMNEdge bpmnElement="flow1" id="BPMNEdge_flow1">22         <omgdi:waypoint x="357.0" y="145.0"></omgdi:waypoint>23         <omgdi:waypoint x="357.0" y="180.0"></omgdi:waypoint>24       </bpmndi:BPMNEdge>25       <bpmndi:BPMNEdge bpmnElement="flow2" id="BPMNEdge_flow2">26         <omgdi:waypoint x="357.0" y="235.0"></omgdi:waypoint>27         <omgdi:waypoint x="357.0" y="270.0"></omgdi:waypoint>28       </bpmndi:BPMNEdge>29     </bpmndi:BPMNPlane>30   </bpmndi:BPMNDiagram>31 </definitions>

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2、发布流程

 1 /** 2      * 2、发布一个流程：发布通过特殊表达式，来获取任务信息  ${流程变量的Key}的流程 3      */ 4     @Test 5     public void  testDeployProcess() { 6         RepositoryService repositoryService = processEngine.getRepositoryService(); 7         DeploymentBuilder builder = repositoryService.createDeployment(); 8         // 加载发布资源 9         builder.name("动态任务处理流程1-测试") // 设置流程显示别名10                 .addClasspathResource("leave3.bpmn") // 设置流程规则文件11                 .addClasspathResource("leave3.png"); // 设置流程规则的图片12         // 发布流程13         builder.deploy();14     }

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3、启动与测试流程

 1      2     /** 3      * 3、启动流程、执行任务，并查看状态 4      */ 5     @Test 6     public void testUserTask() {         7         // 获取RuntimeService服务对象的实例 8         RuntimeService runtimeService = processEngine.getRuntimeService(); 9         String processDefinitionKey = "userDynamicTask1";10         // 自动执行与Key相对应的流程的最高版本11         Map<String, Object> variables = new HashMap<String, Object>();12         //variables.put("user", "张三");13         variables.put("user", "李四");14         15         ProcessInstance processInstance = runtimeService.startProcessInstanceByKey(processDefinitionKey,variables);        16         String processInstanceId = processInstance.getId();        17         logger.info("processInstanceId:" + processInstance.getId());18         19         // 获取TaskService服务对象的实例20         TaskService taskService = processEngine.getTaskService();21         //String assignee = "张三";22         String assignee = "李四";23         List<Task> tasks = taskService.createTaskQuery().taskAssignee(assignee).list();24         Assert.assertEquals(1, tasks.size());25         Task task = tasks.get(0);        26         logger.info("taskName:" + task.getName());27         logger.info("taskAssignee:" + task.getAssignee());28         Assert.assertEquals("休假",task.getName());29         30         //完成任务31         taskService.complete(task.getId());        32         33         //检查结束状态34         ProcessInstance pInstance = runtimeService35                                                         .createProcessInstanceQuery()36                                                         .processInstanceId(processInstanceId)37                                                         .singleResult();38         Assert.assertNull(pInstance);39         logger.info("动态任务处理流程1,使用${流程变量的Key}方式成功执行！");        40         41     }

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4、运行结果

[INFO][2015-12-02 11:44:05,129][com.mcs.activiti.test.TestUserTaskDynamic]processInstanceId:130001
[INFO][2015-12-02 11:44:05,159][com.mcs.activiti.test.TestUserTaskDynamic]taskName:休假
[INFO][2015-12-02 11:44:05,159][com.mcs.activiti.test.TestUserTaskDynamic]taskAssignee:李四
[INFO][2015-12-02 11:44:05,456][com.mcs.activiti.test.TestUserTaskDynamic]动态任务处理流程1,使用${流程变量的Key}方式成功执行！

二、使用任务分配处理器

1、自定义任务分配处理器步骤

　　1.1、创建一个类来充分“任务分配处理器”，需要实现TaskListener

　　1.2、在实现方式中添加响应的处理逻辑；

　　1.3、在流程中，配置/使用任务处理器。

2、创建自定义任务分配处理器，实现TaskListener

 1 package mcs.listener; 2  3 import org.activiti.engine.delegate.DelegateTask; 4 import org.activiti.engine.delegate.TaskListener; 5  6 public class ManagerTaskListenerHandler implements TaskListener { 7  8     private static final long serialVersionUID = 1L; 9 10     @Override11     public void notify(DelegateTask delegateTask) {12         String assignee = "王五";13         delegateTask.setAssignee(assignee);14         15         //delegateTask.addCandidateUser("王小二");16     }17 18 }

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3、流程定义

 1 <?xml version="1.0" encoding="UTF-8"?> 2 <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"> 3   <process id="userDynamicTask2" name="动态任务处理2" isExecutable="true"> 4     <startEvent id="startevent1" name="Start"></startEvent> 5     <endEvent id="endevent1" name="End"></endEvent> 6     <userTask id="休假" name="休假"> 7       <extensionElements> 8         <activiti:taskListener event="create" class="mcs.listener.ManagerTaskListenerHandler"></activiti:taskListener> 9       </extensionElements>10     </userTask>11     <sequenceFlow id="flow1" sourceRef="startevent1" targetRef="休假"></sequenceFlow>12     <sequenceFlow id="flow2" sourceRef="休假" targetRef="endevent1"></sequenceFlow>13   </process>14   <bpmndi:BPMNDiagram id="BPMNDiagram_userDynamicTask2">15     <bpmndi:BPMNPlane bpmnElement="userDynamicTask2" id="BPMNPlane_userDynamicTask2">16       <bpmndi:BPMNShape bpmnElement="startevent1" id="BPMNShape_startevent1">17         <omgdc:Bounds height="35.0" width="35.0" x="340.0" y="110.0"></omgdc:Bounds>18       </bpmndi:BPMNShape>19       <bpmndi:BPMNShape bpmnElement="endevent1" id="BPMNShape_endevent1">20         <omgdc:Bounds height="35.0" width="35.0" x="340.0" y="270.0"></omgdc:Bounds>21       </bpmndi:BPMNShape>22       <bpmndi:BPMNShape bpmnElement="休假" id="BPMNShape_休假">23         <omgdc:Bounds height="55.0" width="105.0" x="305.0" y="180.0"></omgdc:Bounds>24       </bpmndi:BPMNShape>25       <bpmndi:BPMNEdge bpmnElement="flow1" id="BPMNEdge_flow1">26         <omgdi:waypoint x="357.0" y="145.0"></omgdi:waypoint>27         <omgdi:waypoint x="357.0" y="180.0"></omgdi:waypoint>28       </bpmndi:BPMNEdge>29       <bpmndi:BPMNEdge bpmnElement="flow2" id="BPMNEdge_flow2">30         <omgdi:waypoint x="357.0" y="235.0"></omgdi:waypoint>31         <omgdi:waypoint x="357.0" y="270.0"></omgdi:waypoint>32       </bpmndi:BPMNEdge>33     </bpmndi:BPMNPlane>34   </bpmndi:BPMNDiagram>35 </definitions>

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4、发布流程

 1 /** 2      * 4、发布一个流程：发布通过自定义任务分配处理器的流程 3      *         自定义任务分配处理器步骤: 4      *         1、创建一个类来充分“任务分配处理器”，需要实现TaskListener 5     *        2、在实现方式中添加响应的处理逻辑； 6     *        3、在流程中，配置/使用任务处理器。 7      */ 8     @Test 9     public void  testDeployProcess2() {10         RepositoryService repositoryService = processEngine.getRepositoryService();11         DeploymentBuilder builder = repositoryService.createDeployment();12         // 加载发布资源13         builder.name("动态任务处理流程2-测试") // 设置流程显示别名14                 .addClasspathResource("leave4.bpmn") // 设置流程规则文件15                 .addClasspathResource("leave4.png"); // 设置流程规则的图片16         // 发布流程17         builder.deploy();18     }19

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5、启动与测试流程

 1     /** 2      * 5、启动流程、执行任务，并查看状态 3      */ 4     @Test 5     public void testUserTask2() {         6         // 获取RuntimeService服务对象的实例 7         RuntimeService runtimeService = processEngine.getRuntimeService(); 8         String processDefinitionKey = "userDynamicTask2"; 9         // 自动执行与Key相对应的流程的最高版本    10         ProcessInstance processInstance = runtimeService.startProcessInstanceByKey(processDefinitionKey);        11         String processInstanceId = processInstance.getId();        12         logger.info("processInstanceId:" + processInstance.getId());13         14         // 获取TaskService服务对象的实例15         TaskService taskService = processEngine.getTaskService();16         String assignee = "王五";17         List<Task> tasks = taskService.createTaskQuery().taskAssignee(assignee).list();18         Assert.assertEquals(1, tasks.size());19         Task task = tasks.get(0);        20         logger.info("taskName:" + task.getName());21         logger.info("taskAssignee:" + task.getAssignee());22         Assert.assertEquals("休假",task.getName());23         24         //完成任务25         taskService.complete(task.getId());        26         27         //检查结束状态28         ProcessInstance pInstance = runtimeService29                                                         .createProcessInstanceQuery()30                                                         .processInstanceId(processInstanceId)31                                                         .singleResult();32         Assert.assertNull(pInstance);33         logger.info("动态任务处理流程2,使用自定义任务分配处理器方式成功执行！");        34         35     }

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6、运行结果

[INFO][2015-12-02 11:46:51,818][com.mcs.activiti.test.TestUserTaskDynamic]processInstanceId:132501
[INFO][2015-12-02 11:46:51,879][com.mcs.activiti.test.TestUserTaskDynamic]taskName:休假
[INFO][2015-12-02 11:46:51,879][com.mcs.activiti.test.TestUserTaskDynamic]taskAssignee:王五
[INFO][2015-12-02 11:46:52,192][com.mcs.activiti.test.TestUserTaskDynamic]动态任务处理流程2,使用自定义任务分配处理器方式成功执行！

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