activiti参考5-任务TASK

一、概要

1,设计TASK的表主要是:ACT_RU_TASK,ACT_HI_TASKINST(见参考-activiti表);

2,任务主要有:人工任务(usertask),服务任务(servicetask)等;

3,候选人/候选组(candidate):可以执行任务的一类人或者多个组,候选人/候选组中都可以去签收任务,一旦某人签收,就成为受理人,其他人就不能再签收受理此任务;usertask流程图中,candidate标示候选;候选人涉及的表ACT_RU_IDENTITYLINK;

4,受理人(assignee):有两种情况,一种是候选人/组中有人签收任务后成为受理人,另外一种是流程图中直接指定受理人,但是可以指定一个动态受理人;受理人涉及的表ACT_RU_TASK;

5,持有人(owner):持有人设置主要是存入历史表中,用于历史任务的查询,涉及的表ACT_HI_TASKINST;

二、任务操作

1,创建TASK任务与设置权限:可以使用代码创建任务,但是实际操作中都是绘制流程图。绘制TASK后,在属性可以设置候选人和受理人,一般都是设置候选人,因为固定受理人不太符合程序变动;

activiti参考5-任务TASK_第1张图片

候选人设置了deptleader,该值将部署在表ACT_RU_IDENTITYLINK中,查看xml看见:

//设置了候选组
 <userTask id="deptLeaderAudit" name="部门领导审批" activiti:candidateGroups="deptLeader">
 </userTask>

完整的XML(无图形位置信息)

<process id="leave" name="请假流程" isExecutable="true">
    <documentation>请假流程演示</documentation>
    <startEvent id="startevent1" name="Start" activiti:initiator="applyUserId"></startEvent>
    <userTask id="deptLeaderAudit" name="部门领导审批" activiti:candidateGroups="deptLeader"></userTask>
    <exclusiveGateway id="exclusivegateway5" name="Exclusive Gateway"></exclusiveGateway>
    <userTask id="modifyApply" name="调整申请" activiti:assignee="${applyUserId}">
      <extensionElements>
        <activiti:taskListener event="complete" delegateExpression="${afterModifyApplyContentProcessor}"></activiti:taskListener>
      </extensionElements>
    </userTask>
    <userTask id="hrAudit" name="人事审批" activiti:candidateGroups="hr"></userTask>
    <exclusiveGateway id="exclusivegateway6" name="Exclusive Gateway"></exclusiveGateway>
    <userTask id="reportBack" name="销假" activiti:assignee="${applyUserId}">
      <extensionElements>
        <activiti:taskListener event="complete" delegateExpression="${reportBackEndProcessor}"></activiti:taskListener>
      </extensionElements>
    </userTask>
    <endEvent id="endevent1" name="End"></endEvent>
    <exclusiveGateway id="exclusivegateway7" name="Exclusive Gateway"></exclusiveGateway>
    <sequenceFlow id="flow2" sourceRef="startevent1" targetRef="deptLeaderAudit"></sequenceFlow>
    <sequenceFlow id="flow3" sourceRef="deptLeaderAudit" targetRef="exclusivegateway5"></sequenceFlow>
    <sequenceFlow id="flow4" name="不同意" sourceRef="exclusivegateway5" targetRef="modifyApply">
      <conditionExpression xsi:type="tFormalExpression"><![CDATA[${!deptLeaderPass}]]></conditionExpression>
    </sequenceFlow>
    <sequenceFlow id="flow5" name="同意" sourceRef="exclusivegateway5" targetRef="hrAudit">
      <conditionExpression xsi:type="tFormalExpression"><![CDATA[${deptLeaderPass}]]></conditionExpression>
    </sequenceFlow>
    <sequenceFlow id="flow6" sourceRef="hrAudit" targetRef="exclusivegateway6"></sequenceFlow>
    <sequenceFlow id="flow7" name="同意" sourceRef="exclusivegateway6" targetRef="reportBack">
      <conditionExpression xsi:type="tFormalExpression"><![CDATA[${hrPass}]]></conditionExpression>
    </sequenceFlow>
    <sequenceFlow id="flow8" sourceRef="reportBack" targetRef="endevent1"></sequenceFlow>
    <sequenceFlow id="flow9" name="不同意" sourceRef="exclusivegateway6" targetRef="modifyApply">
      <conditionExpression xsi:type="tFormalExpression"><![CDATA[${!hrPass}]]></conditionExpression>
    </sequenceFlow>
    <sequenceFlow id="flow10" name="重新申请" sourceRef="exclusivegateway7" targetRef="deptLeaderAudit">
      <conditionExpression xsi:type="tFormalExpression"><![CDATA[${reApply}]]></conditionExpression>
    </sequenceFlow>
    <sequenceFlow id="flow11" sourceRef="modifyApply" targetRef="exclusivegateway7"></sequenceFlow>
    <sequenceFlow id="flow12" name="结束流程" sourceRef="exclusivegateway7" targetRef="endevent1">
      <conditionExpression xsi:type="tFormalExpression"><![CDATA[${!reApply}]]></conditionExpression>
    </sequenceFlow>
  </process>

2,查询候选任务

//根据候选组ID查询拥有任务
List<Task> tasks = taskService
                    .createTaskQuery()
                    .taskCandidateGroup(groupA.getId())
                    .list();
for (Task task : tasks) 
{System.out.println(task.getName());}	

//根据用户ID查询任务
tasks = taskService
        .createTaskQuery()
        .taskCandidateUser(user.getId())
        .list();
for (Task task : tasks) 
{System.out.println(task.getName());}

//调用taskCandidateGroupIn
List<String> groupIds = new ArrayList<String>();
    groupIds.add(groupA.getId());
    groupIds.add(groupB.getId());
tasks = taskService
        .createTaskQuery()
        .taskCandidateGroupIn(groupIds)
        .list();
for (Task task : tasks)
 {System.out.println(task.getName());}
 
//查询权限数据
List<IdentityLink> links = taskService
                           .getIdentityLinksForTask(tasks.get(0)
                           .getId());
System.out.println("关系数据量: " + links.size());}


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