一、概要
- 设计TASK的表主要是：ACT_RU_TASK，ACT_HI_TASKINST（见参考-activiti表）；
- 任务主要有：人工任务（usertask）,服务任务（servicetask）等；
- 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;
- 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;
- 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
- 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；
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taskCandidateGroupInList<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());}
