Activiti5工作流之入门简单例子

// VacationRequest.java 2  3 /** 4  * author : 冯孟活 ^_^  5  * dates : 2015年9月1日 下午10:32:58  6  * class : 演示简单的公司请假流程 7  *  8  *         一个简单的流程分三个步骤： 9  *                 1、发布流程(部署流程定义)10  *                 2、启动流程实例11  *                 3、完成任务(先查询任务，后完成任务)12  *                 4、挂起、激活一个流程实例(可选)13  */14 public class VacationRequest {15     public static void main(String[] args) {16 17         /**18          *  第一步：发布流程19          */20         ProcessEngine processEngine = ProcessEngineConfiguration // 通过流程引擎配置类来创建流程引擎21                 .createProcessEngineConfigurationFromResource("activiti.cfg.xml").buildProcessEngine();22         RepositoryService repositoryService = processEngine.getRepositoryService(); // 通过流程引擎来得到知识库服务23         repositoryService.createDeployment().addClasspathResource("VacationRequest.bpmn").deploy(); // 通过只是库部署流程定义24         System.out.println("流程定义的个数="+repositoryService.createDeploymentQuery().count()); // 查询所有发布的流程定义的个数25         26         /**27          *  第二步：启动一个流程实例28          */29         /*定义Map来存放流程变量：流程变量经常会被用到，因为他们赋予来自同一个流程定义的不同流程实例30            的特别含义，简单来说，流程变量是区分流程实例的关键31         */32         Map<String, Object> variables = new HashMap<>(); // 定义一个Map来存放流程变量33         variables.put("employeeName","Kermit");34         variables.put("numberOfDays",new Integer(4));35         variables.put("vacationMotivation","I'm really tired!");36         RuntimeService runtimeService = processEngine.getRuntimeService(); // 获取运行服务37         runtimeService.startProcessInstanceByKey("vacationRequest",variables); // 通过运行服务来启动流程实例，并且设置流程变量(通过key 或者 id 部署都可以)38         System.out.println("流程实例的个数="+runtimeService.createProcessInstanceQuery().count()); // 通过运行服务来查询所有的流程实例的个数39         40         /**41          *  第三部：完成任务42          */43         TaskService taskService = processEngine.getTaskService(); // 通过流程引擎获取任务服务44         List<Task> tasks = taskService.createTaskQuery().taskCandidateGroup("management").list(); // 通过任务服务来查询任务候选组(这是通过组来分区)45         for (Task task : tasks) { // 遍历打印任务46             System.err.println("能找到的任务="+task.getName());47         }48         Task task = tasks.get(0); // 获取第一个任务49         Map<String,Object> taskVariables = new HashMap<>(); // 定义一个Map来存放任务变量50         taskVariables.put("vacationApproved","false");51         taskVariables.put("managerMotivation","We have a tight deadline!");52         taskService.complete(task.getId(),taskVariables); // 根据Id来完成任务53         54         /**55          *  挂起，激活一个流程56          */57         /*58          * 我们可以挂起一个流程定义。当挂起流程定义时， 就不能创建新流程了（会抛出一个异常）。 59          * 可以通过RepositoryService挂起一个流程：60          */61         //repositoryService.suspendProcessDefinitionByKey("vacationRequest"); // 挂起一个流程定义62         //try{63             //runtimeService.startProcessInstanceByKey("vacationRequest"); // 启动一个流程实例64         //}catch(ActivitiException e){ // 这里会抛出一个Activiti自定义异常65             //e.printStackTrace();66         //}67         68         /*69          * 备注下：70          *         也可以挂起一个流程实例。挂起时，流程不能继续执行（比如，完成任务会抛出异常），71          * 异步操作（比如定时器）也不会执行。 挂起流程实例可以调用 runtimeService.suspendProcessInstance方法。 72          * 激活流程实例可以调用runtimeService.activateProcessInstanceXXX方法。73          */74     }75 }

<!-- activiti.cfg.xml --> 2  3 <?xml version="1.0" encoding="UTF-8"?> 4 <beans xmlns="http://www.springframework.org/schema/beans" 5        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 6        xsi:schemaLocation="http://www.springframework.org/schema/beans 7        http://www.springframework.org/schema/beans/spring-beans.xsd"> 8   9     <bean id="processEngineConfiguration" class="org.activiti.engine.impl.cfg.StandaloneProcessEngineConfiguration">10         <property name="databaseSchemaUpdate" value="update"/>11         <property name="jdbcUrl" value="jdbc:mysql://localhost:3306/db_activiti?useUnicode=true&amp;characterEncoding=utf-8"/>12         <property name="jdbcDriver" value="com.mysql.jdbc.Driver"/>13         <property name="jdbcUsername" value="root"/>14         <property name="jdbcPassword" value="root"/>15         <property name="jobExecutorActivate" value="true"/>16     </bean>17     18 </beans>

<!-- VacationRequest.bpmn --> 2 <?xml version="1.0" encoding="UTF-8" ?> 3 <definitions id="definitions" 4              targetNamespace="http://activiti.org/bpmn20" 5              xmlns="http://www.omg.org/spec/BPMN/20100524/MODEL" 6              xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 7              xmlns:activiti="http://activiti.org/bpmn"> 8  9   <process id="vacationRequest" name="Vacation request">10 11     <startEvent id="request" activiti:initiator="employeeName">12       <extensionElements>13         <activiti:formProperty id="numberOfDays" name="Number of days" type="long" value="1" required="true"/>14         <activiti:formProperty id="startDate" name="First day of holiday (dd-MM-yyy)" datePattern="dd-MM-yyyy hh:mm" type="date" required="true" />15         <activiti:formProperty id="vacationMotivation" name="Motivation" type="string" />16       </extensionElements>17     </startEvent>18     <sequenceFlow id="flow1" sourceRef="request" targetRef="handleRequest" />19 20     <userTask id="handleRequest" name="Handle vacation request" >21       <documentation>22         ${employeeName} would like to take ${numberOfDays} day(s) of vacation (Motivation: ${vacationMotivation}).23       </documentation>24       <extensionElements>25          <activiti:formProperty id="vacationApproved" name="Do you approve this vacation" type="enum" required="true">26           <activiti:value id="true" name="Approve" />27           <activiti:value id="false" name="Reject" />28         </activiti:formProperty>29         <activiti:formProperty id="managerMotivation" name="Motivation" type="string" />30       </extensionElements>31       <potentialOwner>32         <resourceAssignmentExpression>33           <formalExpression>management</formalExpression>34         </resourceAssignmentExpression>35       </potentialOwner>36     </userTask>37     <sequenceFlow id="flow2" sourceRef="handleRequest" targetRef="requestApprovedDecision" />38 39     <exclusiveGateway id="requestApprovedDecision" name="Request approved?" />40     <sequenceFlow id="flow3" sourceRef="requestApprovedDecision" targetRef="sendApprovalMail">41       <conditionExpression xsi:type="tFormalExpression">${vacationApproved == 'true'}</conditionExpression>42     </sequenceFlow>43 44     <task id="sendApprovalMail" name="Send confirmation e-mail" />45     <sequenceFlow id="flow4" sourceRef="sendApprovalMail" targetRef="theEnd1" />46     <endEvent id="theEnd1" />47 48     <sequenceFlow id="flow5" sourceRef="requestApprovedDecision" targetRef="adjustVacationRequestTask">49       <conditionExpression xsi:type="tFormalExpression">${vacationApproved == 'false'}</conditionExpression>50     </sequenceFlow>51 52     <userTask id="adjustVacationRequestTask" name="Adjust vacation request">53       <documentation>54         Your manager has disapproved your vacation request for ${numberOfDays} days.55         Reason: ${managerMotivation}56       </documentation>57       <extensionElements>58         <activiti:formProperty id="numberOfDays" name="Number of days" value="${numberOfDays}" type="long" required="true"/>59         <activiti:formProperty id="startDate" name="First day of holiday (dd-MM-yyy)" value="${startDate}" datePattern="dd-MM-yyyy hh:mm" type="date" required="true" />60         <activiti:formProperty id="vacationMotivation" name="Motivation" value="${vacationMotivation}" type="string" />61         <activiti:formProperty id="resendRequest" name="Resend vacation request to manager?" type="enum" required="true">62           <activiti:value id="true" name="Yes" />63           <activiti:value id="false" name="No" />64         </activiti:formProperty>65       </extensionElements>66       <humanPerformer>67         <resourceAssignmentExpression>68           <formalExpression>${employeeName}</formalExpression>69         </resourceAssignmentExpression>70       </humanPerformer>71     </userTask>72     <sequenceFlow id="flow6" sourceRef="adjustVacationRequestTask" targetRef="resendRequestDecision" />73 74     <exclusiveGateway id="resendRequestDecision" name="Resend request?" />75     <sequenceFlow id="flow7" sourceRef="resendRequestDecision" targetRef="handleRequest">76       <conditionExpression xsi:type="tFormalExpression">${resendRequest == 'true'}</conditionExpression>77     </sequenceFlow>78 79      <sequenceFlow id="flow8" sourceRef="resendRequestDecision" targetRef="theEnd2">80       <conditionExpression xsi:type="tFormalExpression">${resendRequest == 'false'}</conditionExpression>81     </sequenceFlow>82     <endEvent id="theEnd2" />83 84   </process>85 86 </definitions>