任务签收

一、

taskList.jsp中有签收入口

						
							签收
						
						
							<%-- 此处用tkey记录当前节点的名称 --%>
							办理
						

U_TASK的assignee_字段为空才能签收。

二、

然后具体签收做了什么事情呢？在控制层中有

@Controller
@RequestMapping(value = "/oa/leave")
public class LeaveController {

    @Autowired
    protected TaskService taskService;

    /**
     * 签收任务
     */
    @RequestMapping(value = "task/claim/{id}")
    public String claim(@PathVariable("id") String taskId, HttpSession session, RedirectAttributes redirectAttributes) {
        String userId = UserUtil.getUserFromSession(session).getId();
        taskService.claim(taskId, userId);
        redirectAttributes.addFlashAttribute("message", "任务已签收");
        return "redirect:/oa/leave/list/task";
    }

}

主要就是 taskService.claim(taskId, userId); 

那么它做了什么事情呢，我们看打印日志

--- starting ClaimTaskCmd --------------------------------------------------------
Preparing: select * from ACT_RU_TASK where ID_ = ? 
Parameters: 17(String)

Preparing: select * from ACT_HI_TASKINST where ID_ = ? 
Parameters: 17(String)

Preparing: select * from ACT_RU_EXECUTION where ID_ = ? 
Parameters: 12(String)

Preparing: select * from ACT_RU_IDENTITYLINK where PROC_INST_ID_ = ? 
Parameters: 12(String)

Preparing: select * from ACT_RE_PROCDEF where ID_ = ? 
Parameters: leave:1:20(String)

Preparing: select RES.* from ACT_HI_ACTINST RES WHERE RES.EXECUTION_ID_ = ? and RES.ACT_ID_ = ? and RES.END_TIME_ is null order by RES.ID_ asc LIMIT ? OFFSET ? 
Parameters: 12(String), deptLeaderAudit(String), 1(Integer), 0(Integer)

inserting: IdentityLinkEntity[id=20013, type=participant, userId=leaderuser, processInstanceId=12]

Preparing: insert into ACT_RU_IDENTITYLINK (ID_, REV_, TYPE_, USER_ID_, GROUP_ID_, TASK_ID_, PROC_INST_ID_, PROC_DEF_ID_) values (?, 1, ?, ?, ?, ?, ?, ?) 
Parameters: 20013(String), participant(String), leaderuser(String), null, null, 12(String), null

inserting: org.activiti.engine.impl.persistence.entity.HistoricIdentityLinkEntity@2203c1
Preparing: insert into ACT_HI_IDENTITYLINK (ID_, TYPE_, USER_ID_, GROUP_ID_, TASK_ID_, PROC_INST_ID_) values (?, ?, ?, ?, ?, ?) 
Parameters: 20013(String), participant(String), leaderuser(String), null, null, 12(String)

updating: Task[id=17, name=部门领导审批]
Preparing: update ACT_RU_TASK SET REV_ = ?, NAME_ = ?, PARENT_TASK_ID_ = ?, PRIORITY_ = ?, CREATE_TIME_ = ?, OWNER_ = ?, ASSIGNEE_ = ?, DELEGATION_ = ?, EXECUTION_ID_ = ?, PROC_DEF_ID_ = ?, DESCRIPTION_ = ?, DUE_DATE_ = ?, CATEGORY_ = ?, SUSPENSION_STATE_ = ?, FORM_KEY_ = ? where ID_= ? and REV_ = ? 
Parameters: 2(Integer), 部门领导审批(String), null, 50(Integer), 2015-05-05 15:27:45.0(Timestamp), null, leaderuser(String), null, 12(String), leave:1:20(String), null, null, null, 1(Integer), null, 17(String), 1(Integer)

updating: org.activiti.engine.impl.persistence.entity.HistoricTaskInstanceEntity@124aa56
Preparing: update ACT_HI_TASKINST set EXECUTION_ID_ = ?, NAME_ = ?, PARENT_TASK_ID_ = ?, DESCRIPTION_ = ?, OWNER_ = ?, ASSIGNEE_ = ?, CLAIM_TIME_ = ?, END_TIME_ = ?, DURATION_ = ?, DELETE_REASON_ = ?, TASK_DEF_KEY_ = ?, FORM_KEY_ = ?, PRIORITY_ = ?, DUE_DATE_ = ?, CATEGORY_ = ? where ID_ = ? 
Parameters: 12(String), 部门领导审批(String), null, null, null, leaderuser(String), 2015-05-07 15:18:16.779(Timestamp), null, null, null, deptLeaderAudit(String), null, 50(Integer), null, null, 17(String)

updating: HistoricActivityInstanceEntity[activityId=deptLeaderAudit, activityName=部门领导审批]
Preparing: update ACT_HI_ACTINST set EXECUTION_ID_ = ?, ASSIGNEE_ = ?, END_TIME_ = ?, DURATION_ = ? where ID_ = ? 
Parameters: 12(String), leaderuser(String), null, null, 16(String)

--- ClaimTaskCmd finished --------------------------------------------------------

--- starting TaskQueryImpl --------------------------------------------------------
--- TaskQueryImpl finished --------------------------------------------------------

要点：

往ACT_RU_IDENTITYLINK表中增加一条记录，表示流程实例现在被user_id为leaderuser的用户签收(participant)了；

更新ACT_RU_TASK表中任务记录，主要更新ASSIGNEE_字段值为leaderuser，后面taskList.jsp中就不能再次签收了；

三、反签收unclaim

如果签收了又签收会如何呢？ 当然是会报错……而且异常会直接抛出到页面

这里我们稍微调整一下代码

taskList.jsp调整

						
							签收
						
						
							<%-- 此处用tkey记录当前节点的名称 --%>
							办理
							反签收
						

控制层增加

    /**
     * 反签收任务
     */
    @RequestMapping(value = "task/unclaim/{id}")
    public String unclaim(@PathVariable("id") String taskId, HttpSession session, RedirectAttributes redirectAttributes) {
        taskService.unclaim(taskId);
        redirectAttributes.addFlashAttribute("message", "任务已反签收");
        return "redirect:/oa/leave/list/task";
    }

这样我们看一下执行日志

--- starting ClaimTaskCmd --------------------------------------------------------

Preparing: select * from ACT_RU_TASK where ID_ = ? 
Parameters: 17(String)

Preparing: select * from ACT_HI_TASKINST where ID_ = ? 
Parameters: 17(String)

Preparing: select * from ACT_RE_PROCDEF where ID_ = ? 
Parameters: leave:1:20(String)

Preparing: select * from ACT_RU_EXECUTION where ID_ = ? 

Parameters: 12(String)

Preparing: select RES.* from ACT_HI_ACTINST RES WHERE RES.EXECUTION_ID_ = ? and RES.ACT_ID_ = ? and RES.END_TIME_ is null order by RES.ID_ asc LIMIT ? OFFSET ? 
Parameters: 12(String), deptLeaderAudit(String), 1(Integer), 0(Integer)

updating: Task[id=17, name=部门领导审批]
Preparing: update ACT_RU_TASK SET REV_ = ?, NAME_ = ?, PARENT_TASK_ID_ = ?, PRIORITY_ = ?, CREATE_TIME_ = ?, OWNER_ = ?, ASSIGNEE_ = ?, DELEGATION_ = ?, EXECUTION_ID_ = ?, PROC_DEF_ID_ = ?, DESCRIPTION_ = ?, DUE_DATE_ = ?, CATEGORY_ = ?, SUSPENSION_STATE_ = ?, FORM_KEY_ = ? where ID_= ? and REV_ = ? 
Parameters: 9(Integer), 部门领导审批(String), null, 50(Integer), 2015-05-05 15:27:45.0(Timestamp), null, null, null, 12(String), leave:1:20(String), null, null, null, 1(Integer), null, 17(String), 8(Integer)

updating: org.activiti.engine.impl.persistence.entity.HistoricTaskInstanceEntity@3a3b6b
Preparing: update ACT_HI_TASKINST set EXECUTION_ID_ = ?, NAME_ = ?, PARENT_TASK_ID_ = ?, DESCRIPTION_ = ?, OWNER_ = ?, ASSIGNEE_ = ?, CLAIM_TIME_ = ?, END_TIME_ = ?, DURATION_ = ?, DELETE_REASON_ = ?, TASK_DEF_KEY_ = ?, FORM_KEY_ = ?, PRIORITY_ = ?, DUE_DATE_ = ?, CATEGORY_ = ? where ID_ = ? 
Parameters: 12(String), 部门领导审批(String), null, null, null, null, 2015-05-07 16:03:48.962(Timestamp), null, null, null, deptLeaderAudit(String), null, 50(Integer), null, null, 17(String)

updating: HistoricActivityInstanceEntity[activityId=deptLeaderAudit, activityName=部门领导审批]
Preparing: update ACT_HI_ACTINST set EXECUTION_ID_ = ?, ASSIGNEE_ = ?, END_TIME_ = ?, DURATION_ = ? where ID_ = ? 
Parameters: 12(String), null, null, null, 16(String)

--- ClaimTaskCmd finished --------------------------------------------------------

主要是将ACT_RU_TASK表的ASSIGNEE_置为空。

我们发现这个地方没有去删除ACT_RU_IDENTITYLINK表中之前插入的那条记录，这时如果我们再次签收如果用户一样不会影响，如果用户不一样会新增一条记录……所以原来那条记录最好还是手工删除吧，不然感觉怪怪的。同理，ACT_HI_IDENTITYLINK表中的历史记录也应该删除。

很多地方说到了委托，但有时候我们任务分配给某个人之后，还想着能收回给别人来办理，感觉不太一样。