JBPM(三)— JPDL 流程定义语言详解编程语言
JPDL 全称JBossjBPMProcessDefinitionLanguage,是JBPM的流程定义语言。
JPDL流程定义语言主要掌握以下几种:
1.process (流程)
2.transition (连线、转移)
3.start (开始活动)
4.end、end-error、end-cancel (结束活动)
5.state (状态活动)
6.task (任务活动)
7.decision (判断活动)
8.fork、join (分支/聚合活动
顶级元素 process 定义
name用于显示,通常定义中文
key 用于代码操作,通常定义英文
version 版本号,不指定,相同key流程,version自动+1(如果指定version不要和其它冲突)
在 jbpm4_deployprop 生成 pdId 流程定义id = pdKey + “-” + pdVersion
发布流程保证,key和name 完全相同
代码示例:
process.jpdl.xml
?xml version="1.0" encoding="UTF-8"? process key="process" name="测试流程" xmlns="http://jbpm.org/4.4/jpdl" !-- 根节点 -- start g="235,30,48,48" name="start1" transition g="-47,-17" name="to 请假" to="请假"/ /start end g="251,315,48,48" name="end1"/ task g="223,128,92,52" name="请假" transition g="-47,-17" name="to 审批" to="审批"/ /task task g="231,211,92,52" name="审批" transition g="-47,-17" name="to end1" to="end1"/ /task /process
ProcessTest.java
package com.my.jbpm.jpdl; import org.jbpm.api.Configuration; import org.jbpm.api.ProcessEngine; import org.jbpm.api.RepositoryService; import org.junit.Test; public class ProcessTest { @Test // 发布process.jpdl.xml public void demo(){ //流程引擎 ProcessEngine processEngine = new Configuration().buildProcessEngine(); //获得Service RepositoryService repositoryService = processEngine.getRepositoryService(); //发布 repositoryService.createDeployment().addResourceFromClasspath("process.jpdl.xml").deploy();
Transition 节点(流转节点)
一个活动中可以指定一个或多个transition
开始活动只能有一个transition
结束活动没有 transition
其它活动可以有1条或者多条transition
如果只有一个,可以不指定名称,如果有多个,则要分别指定唯一名称
无名称transition
executionService.signalExecutionById(executionId)
有名称transition
executionService.signalExecutionById(executionId, transitionName)
定义transition元素,可以不写name属性,成为默认transition节点
在向后流转时,如果没有transition的name属性,将使用 默认transition节点(没有name属性的transition )
代码示例:
transition.jpdl.xml
?xml version="1.0" encoding="UTF-8"? process name="transition" xmlns="http://jbpm.org/4.4/jpdl" start g="280,9,48,48" name="start1" transition g="-53,-17" name="to task1" to="task1"/ /start end g="290,299,48,48" name="end1"/ task g="269,89,92,52" name="task1" !-- 没有name的transition成为 默认transition -- transition to="task2"/ transition g="-53,-17" name="to task3" to="task3"/ /task task g="157,182,92,52" name="task2" transition g="-47,-17" name="to end1" to="end1"/ /task task g="376,186,92,52" name="task3" transition g="-47,-17" name="to end1" to="end1"/ /task /process
TransitionTest.java
package com.my.jbpm.jpdl; import org.jbpm.api.Configuration; import org.jbpm.api.ProcessEngine; import org.junit.Test; public class TransitionTest { @Test //发布 启动 transition.jpdl.xml public void demo1(){ //流程引擎 ProcessEngine processEngine = new Configuration().buildProcessEngine(); //发布流程 processEngine.getRepositoryService().createDeployment().addResourceFromClasspath("transition.jpdl.xml").deploy(); //启动实例 processEngine.getExecutionService().startProcessInstanceByKey("transition"); @Test //完成task1 任务 public void demo2(){ //流程引擎 ProcessEngine processEngine = new Configuration().buildProcessEngine(); //向后流转 //processEngine.getExecutionService().signalExecutionById("transition.10007"); // 没有指定name 使用默认transition processEngine.getExecutionService().signalExecutionById("transition.10007","to task3");// executionId 在 execution表 ID_
start和end 节点
start 开始活动
代表流程的开始边界,一个流程有且只能有一个Start活动。开始活动只能指定一个Transition。在流程实例启动后,会自动的使用这个唯一的Transition离开开始活动,到一下个活动
end 结束活动
代表流程的结束边界,可以有多个,也可以没有。如果有多个,则到达任一个结束活动,整个流程就都结束了;如果没有,则到达最后那个没有Transition的活动,流程就结束了
中止流程代码
processEngine.getExecutionService().endProcessInstance(processInstanceId, ProcessInstance.STATE_ENDED);
在任意节点,都能够结束流程
state 节点 (状态节点,当前状态发生改变,向后流转)
State节点,等待含义,当服务器处理一些数据后,实现自动触发流转 executionService.signalExecutionById
代码示例:
state.jpdl.xml
?xml version="1.0" encoding="UTF-8"? process name="state" xmlns="http://jbpm.org/4.4/jpdl" start g="264,13,48,48" name="start1" transition g="-71,-17" name="to 用户注册" to="用户注册"/ /start end g="263,284,48,48" name="end1"/ task g="245,92,92,52" name="用户注册" transition g="-95,-17" name="to 发送激活邮件" to="发送激活邮件"/ /task state g="241,182,92,52" name="发送激活邮件" transition g="-47,-17" name="to end1" to="end1"/ /state /process
StateTest.java
package com.my.jbpm.jpdl; import org.jbpm.api.Configuration; import org.jbpm.api.ProcessEngine; import org.junit.Test; public class StateTest { @Test //发布流程,启动实例 public void demo1(){ //流程引擎 ProcessEngine processEngine = new Configuration().buildProcessEngine(); //发布流程 processEngine.getRepositoryService().createDeployment().addResourceFromClasspath("state.jpdl.xml").deploy(); //启动实例 processEngine.getExecutionService().startProcessInstanceByKey("state"); @Test //用户注册 public void demo2(){ //流程引擎 ProcessEngine processEngine = new Configuration().buildProcessEngine(); //人为办理任务 processEngine.getTaskService().completeTask("40008"); @Test //发送激活邮件 public void demo3(){ //流程引擎 ProcessEngine processEngine = new Configuration().buildProcessEngine(); //通过 state节点 processEngine.getExecutionService().signalExecutionById("state.40007");
decision 判断节点
使用expression,如:expr=”#{表达式}”
使用Handler,要实现DecisionHandler接口
如果同时配置了expression与Handler,则expression有效,忽略Handler
代码示例:
方式一 : 通过 expr=#{表达式} 控制程序流转 ,在执行到decisition节点前,必须向流程变量中,存放 condition 变量, expr=”#{condition}” 获取流程变量,变量值和 每个transition 节点name属性比较,哪个一致,就流向哪个transition.
decision1.jpdl.xml
?xml version="1.0" encoding="UTF-8"? process name="decision1" xmlns="http://jbpm.org/4.4/jpdl" start g="276,-7,48,48" name="start1" transition g="-59,-17" name="to 逛公园" to="逛公园买票"/ /start end g="283,346,48,48" name="end1"/ task g="256,61,92,52" name="逛公园买票" transition g="-83,-17" name="to exclusive1" to="exclusive1"/ /task decision expr="#{condition}" g="274,133,48,48" name="exclusive1" transition g="-83,-17" name="to 老年人免票" to="老年人免票"/ transition g="-71,-17" name="to 儿童半价" to="儿童半价"/ transition g="-71,-17" name="to 普通售票" to="普通售票"/ /decision task g="81,220,92,52" name="老年人免票" transition g="-47,-17" name="to end1" to="end1"/ /task task g="259,216,89,56" name="儿童半价" transition g="-47,-17" name="to end1" to="end1"/ /task task g="448,217,92,52" name="普通售票" transition g="-47,-17" name="to end1" to="end1"/ /task /process
DecisionTest.java
@Test //发布流程定义,启动流程实例 public void demo1(){ //流程引擎 ProcessEngine processEngine = new Configuration().buildProcessEngine(); //发布流程 processEngine.getRepositoryService().createDeployment().addResourceFromClasspath("decision1.jpdl.xml").deploy(); //启动实例 processEngine.getExecutionService().startProcessInstanceByKey("decision1"); @Test //逛公园买票 public void demo2(){ //流程引擎 ProcessEngine processEngine = new Configuration().buildProcessEngine(); //完成任务 //设置 condition 变量 Map String, Object variables = new HashMap String, Object variables.put("condition", "to 儿童半价"); processEngine.getTaskService().setVariables("70008", variables); processEngine.getTaskService().completeTask("70008"); }
方式二 : DecisionHandler 接口实现类,控制判断节点流转
MyDecisionHandler.java
package com.my.jbpm.handler; import org.jbpm.api.jpdl.DecisionHandler; import org.jbpm.api.model.OpenExecution; @SuppressWarnings("serial") public class MyDecisionHandler implements DecisionHandler{ @Override public String decide(OpenExecution openExecution) { // 根据流程变量 age,判断是老年人 、儿童 、正常人 int age = Integer.parseInt((String)openExecution.getVariable("age")); if(age 65){ return "to 老年人免票"; }else if(age 4){ return "to 儿童半价"; }else{ return "to 普通售票";
decision2.jpdl.xml
?xml version="1.0" encoding="UTF-8"? process name="decision2" xmlns="http://jbpm.org/4.4/jpdl" start g="274,4,48,48" name="start1" transition g="-59,-17" name="to 逛公园" to="逛公园买票"/ /start end g="289,436,48,48" name="end1"/ task g="256,69,92,52" name="逛公园买票" transition g="-83,-17" name="to exclusive1" to="exclusive1"/ /task decision g="276,147,48,48" name="exclusive1" !-- 指定一个handler 类 -- handler / transition g="-83,-17" name="to 老年人免票" to="老年人免票"/ transition g="-71,-17" name="to 儿童半价" to="儿童半价"/ transition g="-71,-17" name="to 普通售票" to="普通售票"/ /decision task g="75,270,92,52" name="老年人免票" transition g="-47,-17" name="to end1" to="end1"/ /task task g="263,271,92,52" name="儿童半价" transition g="-47,-17" name="to end1" to="end1"/ /task task g="461,272,92,52" name="普通售票" transition g="-47,-17" name="to end1" to="end1"/ /task /process
DecisionTest.java
@Test //发布流程定义,启动流程实例 public void demo3(){ //流程引擎 ProcessEngine processEngine = new Configuration().buildProcessEngine(); //发布流程 processEngine.getRepositoryService().createDeployment().addResourceFromClasspath("decision2.jpdl.xml").deploy(); //启动实例 processEngine.getExecutionService().startProcessInstanceByKey("decision2"); @Test // 完成逛公园 任务 public void demo4(){ //流程引擎 ProcessEngine processEngine = new Configuration().buildProcessEngine(); //完成任务 //设置 age 变量 Map String, Object variables = new HashMap String, Object variables.put("age", "80"); processEngine.getTaskService().setVariables("90008", variables); processEngine.getTaskService().completeTask("90008"); }
fork、join(分支/聚合活动)
解决流程中并发任务问题 (不强调 任务发生顺序)
fork 必须和 join 同时出现
运行到fork节点后,每个分支,产生一个子流程,每个子流程存放当前任务节点
分支节点,是一个流程的当前任务 变为多个
代码示例:
fork.jpdl.xml
?xml version="1.0" encoding="UTF-8"? process name="fork" xmlns="http://jbpm.org/4.4/jpdl" start g="254,-4,48,48" name="start1" transition g="-47,-17" name="to 报销" to="报销"/ /start end g="268,395,48,48" name="end1"/ task g="234,75,92,52" name="报销" transition g="-53,-17" name="to fork1" to="fork1"/ /task fork g="257,142,48,48" name="fork1" transition g="-71,-17" name="to 部门经理" to="部门经理"/ transition g="-71,-17" name="to 财务总监" to="财务总监"/ /fork join g="267,308,48,48" name="join1" transition g="-47,-17" name="to end1" to="end1"/ /join task g="69,219,92,52" name="部门经理" transition g="-53,-17" name="to join1" to="join1"/ /task task g="396,220,107,48" name="财务总监" transition g="-53,-17" name="to join1" to="join1"/ /task /process
ForkJoinTest.java
package com.my.jbpm.jpdl; import org.jbpm.api.Configuration; import org.jbpm.api.ProcessEngine; import org.junit.Test; public class ForkJoinTest { @Test //发布流程定义,启动流程实例 public void demo1(){ //流程引擎 ProcessEngine processEngine = new Configuration().buildProcessEngine(); //发布流程 processEngine.getRepositoryService().createDeployment().addResourceFromClasspath("fork.jpdl.xml").deploy(); //启动实例 processEngine.getExecutionService().startProcessInstanceByKey("fork"); @Test //进行报销 ,完成任务 public void demo2(){ //流程引擎 ProcessEngine processEngine = new Configuration().buildProcessEngine(); //完成任务 processEngine.getTaskService().completeTask("8"); @Test //完成每个分支的任务 public void demo3(){ //流程引擎 ProcessEngine processEngine = new Configuration().buildProcessEngine(); //完成任务 // processEngine.getTaskService().completeTask("10003"); //部门经理审批 processEngine.getTaskService().completeTask("10005"); //财务总监审批
task 节点(任务节点)
个人任务, 指定个人任务负责人,三种方式
1.通过assignee属性 指定任务负责人
2.通过AssignmentHandler指定负责人
3.通过TaskService 直接更换负责人
个人任务常见操作 :
查询个人任务 taskService.findPersonalTasks(userId);
办理个人任务 taskService.completeTask(taskId)
代码示例:
MyAssignmentHandler.java
package com.my.jbpm.handler; import org.jbpm.api.model.OpenExecution; import org.jbpm.api.task.Assignable; import org.jbpm.api.task.AssignmentHandler; @SuppressWarnings("serial") public class MyAssignmentHandler implements AssignmentHandler{ @Override public void assign(Assignable assignable, OpenExecution openExecution) throws Exception { // 个人任务 assignable.setAssignee("老李");// 指定个人任务负责人
personaltask.jpdl.xml
?xml version="1.0" encoding="UTF-8"? process name="personaltask" xmlns="http://jbpm.org/4.4/jpdl" start g="295,6,48,48" name="start1" transition g="-95,-17" name="to 员工提出申请" to="员工提出申请"/ /start end g="292,370,48,48" name="end1"/ task assignee="张三" g="270,85,92,52" name="员工提出申请" transition g="-95,-17" name="to 部门经理审批" to="部门经理审批"/ /task task assignee="#{manager}" g="271,176,92,52" name="部门经理审批" transition g="-83,-17" name="to 总经理审批" to="总经理审批"/ /task task g="273,265,92,52" name="总经理审批" assignment-handler / transition g="-47,-17" name="to end1" to="end1"/ /task /process
PersonalTaskTest.java
package com.my.jbpm.jpdl; import java.util.HashMap; import java.util.List; import java.util.Map; import org.jbpm.api.Configuration; import org.jbpm.api.ProcessEngine; import org.jbpm.api.task.Task; import org.junit.Test; public class PersonalTaskTest { @Test //发布流程定义,启动流程实例 public void demo1(){ //流程引擎 ProcessEngine processEngine = new Configuration().buildProcessEngine(); //发布流程 processEngine.getRepositoryService().createDeployment().addResourceFromClasspath("personaltask.jpdl.xml").deploy(); //启动实例 processEngine.getExecutionService().startProcessInstanceByKey("personaltask"); @Test //查询个人任务,获得任务id public void demo2(){ //流程引擎 ProcessEngine processEngine = new Configuration().buildProcessEngine(); //查询个人任务 List Task tasks = processEngine.getTaskService().findPersonalTasks("张三"); for (Task task : tasks) { System.out.println(task.getId()); @Test // 办理个人任务 (员工请假) public void demo3(){ //流程引擎 ProcessEngine processEngine = new Configuration().buildProcessEngine(); //办理个人任务 Map String, Object map = new HashMap String, Object map.put("manager", "老王"); processEngine.getTaskService().setVariables("8", map); processEngine.getTaskService().completeTask("8"); @Test //办理个人任务 (部门经理审批) public void demo4(){ //流程引擎 ProcessEngine processEngine = new Configuration().buildProcessEngine(); //办理个人任务 processEngine.getTaskService().completeTask("10002"); @Test //改变任务的负责人 public void demo5(){ //流程引擎 ProcessEngine processEngine = new Configuration().buildProcessEngine(); //更换负责人 processEngine.getTaskService().assignTask("20001", "李四");
组任务,任务节点,指定一组人,组内每个人,都具有任务办理能力
组任务可以使用 三种方式指定
1.通过candidate-users 或者 candidate-groups 属性指定组任务负责人
2.通过 AssignmentHandler 程序为任务节点指定组任务负责人
3.直接对任务添加组用户 processEngine.getTaskService().addTaskParticipatingUser(taskId,userId, Participation.CANDIDATE);
查询组任务 : taskService.findGroupTasks(userId)
拾取任务(将组任务变为个人任务 ) : taskService.takeTask(taskId, userId) ;
改变任务的负责人 :
taskService.assignTask 可以改变任务的负责人
taskService.assignTask(taskId , null) ; 将任务负责人设置为null,重新变为组任务
JBPM系统内部提供三张表,管理用户和用户组
jbpm4_id_group 存放组信息
jbpm4_id_user 存放用户信息
jbpm4_id_memership 存放组和用户关系信息
必须先向系统 存入组和用户信息,才能使用 candidate-groups 属性
代码示例:
MyAssignmentHandler.java
package com.my.jbpm.handler; import org.jbpm.api.model.OpenExecution; import org.jbpm.api.task.Assignable; import org.jbpm.api.task.AssignmentHandler; @SuppressWarnings("serial") public class MyAssignmentHandler implements AssignmentHandler{ @Override public void assign(Assignable assignable, OpenExecution openExecution) throws Exception { //组任务 assignable.addCandidateUser("小明"); assignable.addCandidateUser("小王"); assignable.addCandidateGroup("boss");// 指定任务负责组
grouptask.jpdl.xml
?xml version="1.0" encoding="UTF-8"? process name="grouptask" xmlns="http://jbpm.org/4.4/jpdl" start g="322,5,48,48" name="start1" transition g="-119,-17" name="to 员工提交请假申请" to="员工提交请假申请"/ /start end g="343,340,48,48" name="end1"/ !-- candidate-users 为任务一次指定多个负责的用户 -- task candidate-users="张三,李四,王五" g="290,81,131,53" name="员工提交请假申请" transition g="-95,-17" name="to 部门经理审批" to="部门经理审批"/ /task !-- candidate-groups 为任务指定一个负责组id -- !-- manager 是一个组的名字 -- task candidate-groups="manager" g="304,171,122,52" name="部门经理审批" transition g="-83,-17" name="to 总经理审批" to="总经理审批"/ /task task g="303,250,135,52" name="总经理审批" assignment-handler / transition g="-47,-17" name="to end1" to="end1"/ /task /process
GroupTaskTest.java
package com.my.jbpm.jpdl; import java.util.List; import org.jbpm.api.Configuration; import org.jbpm.api.IdentityService; import org.jbpm.api.ProcessEngine; import org.jbpm.api.task.Participation; import org.jbpm.api.task.Task; import org.junit.Test; public class GroupTaskTest { @Test //发布流程定义,启动流程实例 public void demo1(){ //流程引擎 ProcessEngine processEngine = new Configuration().buildProcessEngine(); //发布流程 processEngine.getRepositoryService().createDeployment().addResourceFromClasspath("grouptask.jpdl.xml").deploy(); //启动实例 processEngine.getExecutionService().startProcessInstanceByKey("grouptask"); @Test //查询组任务 public void demo2(){ //流程引擎 ProcessEngine processEngine = new Configuration().buildProcessEngine(); //查询组任务 List Task list = processEngine.getTaskService().findGroupTasks("李四"); System.out.println("长度:" + list.size()); for (Task task : list) { System.out.println(task.getId()); @Test //查询个人任务 public void demo3(){ //流程引擎 ProcessEngine processEngine = new Configuration().buildProcessEngine(); //查询个人任务 List Task list = processEngine.getTaskService().findPersonalTasks("张三"); System.out.println("长度:" + list.size()); for (Task task : list) { System.out.println(task.getId()); @Test //办理组任务,需要先对任务进行拾取 public void demo4(){ //流程引擎 ProcessEngine processEngine = new Configuration().buildProcessEngine(); //拾取任务 processEngine.getTaskService().takeTask("8", "张三"); @Test //将拾取后 任务,恢复为组任务 public void demo5(){ //流程引擎 ProcessEngine processEngine = new Configuration().buildProcessEngine(); //将拾取的任务,放回到组内 processEngine.getTaskService().assignTask("8", null); @Test //办理请假任务 public void demo6(){ //流程引擎 ProcessEngine processEngine = new Configuration().buildProcessEngine(); //办理任务 processEngine.getTaskService().completeTask("8"); @Test //要办理 经理审批 (创建组和用户) public void demo7(){ //流程引擎 ProcessEngine processEngine = new Configuration().buildProcessEngine(); //获得对应Service IdentityService identityService = processEngine.getIdentityService(); //建立manager组 和 对应用户 identityService.createGroup("manager"); // 创建组 identityService.createUser("1", "张", "老"); // 创建用户 identityService.createUser("2", "王", "老"); identityService.createUser("3", "黎", "老"); identityService.createMembership("1", "manager"); // 建立关系 identityService.createMembership("2", "manager"); @Test //查询组任务 (经理审批) public void demo8(){ //流程引擎 ProcessEngine processEngine = new Configuration().buildProcessEngine(); //查询组任务 List Task list = processEngine.getTaskService().findGroupTasks("1");// 老张 System.out.println("长度:" + list.size()); for (Task task : list) { System.out.println(task.getId()); @Test //拾取任务 (经理审批) public void demo9(){ //流程引擎 ProcessEngine processEngine = new Configuration().buildProcessEngine(); //拾取任务 processEngine.getTaskService().takeTask("10001", "1"); @Test //办理经理审批任务 public void demo10(){ //流程引擎 ProcessEngine processEngine = new Configuration().buildProcessEngine(); //办理任务 processEngine.getTaskService().completeTask("10001"); @Test //为总经理审批 ,添加一个新的组用户 public void demo11(){ //流程引擎 ProcessEngine processEngine = new Configuration().buildProcessEngine(); //新增组用户 processEngine.getTaskService().addTaskParticipatingUser("30001", "小红", Participation.CANDIDATE);
swimlanes 泳道使用
泳道可以保证,在同一个流程中,多个任务节点,由同一个用户完成
比如财务报销流程中,在财务报销任务完成后, 确认签字直接成为个人任务,是财务报销任务完成用户。
代码示例:
swimlanes.jpdl.xml
?xml version="1.0" encoding="UTF-8"? process name="swimlanes" xmlns="http://jbpm.org/4.4/jpdl" !-- 定义泳道 -- swimlane candidate-users="张三,李四,王五" name="operator"/ start g="298,10,48,48" name="start1" transition g="-71,-17" name="to 财务报销" to="财务报销"/ /start end g="313,325,48,48" name="end1"/ task g="286,101,92,52" name="财务报销" swimlane="operator" transition g="-71,-17" name="to 确认签字" to="确认签字"/ /task task g="287,215,92,52" name="确认签字" swimlane="operator" transition g="-47,-17" name="to end1" to="end1"/ /task /process
SwimlanesTest.java
package com.my.jbpm.jpdl; import org.jbpm.api.Configuration; import org.jbpm.api.ProcessEngine; import org.junit.Test; public class SwimlanesTest { @Test //发布流程定义,启动流程实例 public void demo1(){ //流程引擎 ProcessEngine processEngine = new Configuration().buildProcessEngine(); //发布流程 processEngine.getRepositoryService().createDeployment().addResourceFromClasspath("swimlanes.jpdl.xml").deploy(); //启动实例 processEngine.getExecutionService().startProcessInstanceByKey("swimlanes"); @Test //拾取 public void demo2(){ //流程引擎 ProcessEngine processEngine = new Configuration().buildProcessEngine(); //拾取任务 processEngine.getTaskService().takeTask("8", "张三"); @Test //办理财务报销 public void demo3(){ //流程引擎 ProcessEngine processEngine = new Configuration().buildProcessEngine(); //办理任务 processEngine.getTaskService().completeTask("8");
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