一、概要
1，設計TASK的表主要是：ACT_RU_TASK，ACT_HI_TASKINST（見參考-activiti表）；
2，任務主要有：人工任務（usertask）,服務任務（servicetask）等；
3，候選人/候選組（candidate）：可以執行任務的一類人或者多個組，候選人/候選組中都可以去簽收任務，一旦某人簽收，就成為受理人，其他人就不能再簽收受理此任務；usertask流程圖中，candidate標示候選；候選人涉及的表ACT_RU_IDENTITYLINK;
4，受理人（assignee）：有兩種情況，一種是候選人/組中有人簽收任務后成為受理人，另外一種是流程圖中直接指定受理人，但是可以指定一個動態受理人；受理人涉及的表ACT_RU_TASK;
5，持有人（owner）：持有人設置主要是存入歷史表中，用於歷史任務的查詢，涉及的表ACT_HI_TASKINST；
二、任務操作
1，創建TASK任務與設置權限：可以使用代碼創建任務，但是實際操作中都是繪制流程圖。繪制TASK后，在屬性可以設置候選人和受理人，一般都是設置候選人，因為固定受理人不太符合程序變動；
候選人設置了deptleader，該值將部署在表ACT_RU_IDENTITYLINK中，查看xml看見：
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//設置了候選組
<
userTask
id
=
"deptLeaderAudit"
name
=
"部門領導審批"
activiti:candidateGroups
=
"deptLeader"
>
</
userTask
>
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完整的XML（無圖形位置信息）
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<
process
id
=
"leave"
name
=
"請假流程"
isExecutable
=
"true"
>
<
documentation
>請假流程演示</
documentation
>
<
startEvent
id
=
"startevent1"
name
=
"Start"
activiti:initiator
=
"applyUserId"
></
startEvent
>
<
userTask
id
=
"deptLeaderAudit"
name
=
"部門領導審批"
activiti:candidateGroups
=
"deptLeader"
></
userTask
>
<
exclusiveGateway
id
=
"exclusivegateway5"
name
=
"Exclusive Gateway"
></
exclusiveGateway
>
<
userTask
id
=
"modifyApply"
name
=
"調整申請"
activiti:assignee
=
"${applyUserId}"
>
<
extensionElements
>
<
activiti:taskListener
event
=
"complete"
delegateExpression
=
"${afterModifyApplyContentProcessor}"
></
activiti:taskListener
>
</
extensionElements
>
</
userTask
>
<
userTask
id
=
"hrAudit"
name
=
"人事審批"
activiti:candidateGroups
=
"hr"
></
userTask
>
<
exclusiveGateway
id
=
"exclusivegateway6"
name
=
"Exclusive Gateway"
></
exclusiveGateway
>
<
userTask
id
=
"reportBack"
name
=
"銷假"
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
=
"重新申請"
sourceRef
=
"exclusivegateway7"
targetRef
=
"deptLeaderAudit"
>
<
conditionExpression
xsi:type
=
"tFormalExpression"
>
<![CDATA[${reApply}]]>
</
conditionExpression
>
</
sequenceFlow
>
<
sequenceFlow
id
=
"flow11"
sourceRef
=
"modifyApply"
targetRef
=
"exclusivegateway7"
></
sequenceFlow
>
<
sequenceFlow
id
=
"flow12"
name
=
"結束流程"
sourceRef
=
"exclusivegateway7"
targetRef
=
"endevent1"
>
<
conditionExpression
xsi:type
=
"tFormalExpression"
>
<![CDATA[${!reApply}]]>
</
conditionExpression
>
</
sequenceFlow
>
</
process
>
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2，查詢候選任務
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//根據候選組ID查詢擁有任務
List<Task> tasks = taskService
.createTaskQuery()
.taskCandidateGroup(groupA.getId())
.list();
for
(Task task : tasks)
{System.out.println(task.getName());}
//根據用戶ID查詢任務
tasks = taskService
.createTaskQuery()
.taskCandidateUser(user.getId())
.list();
for
(Task task : tasks)
{System.out.println(task.getName());}
//調用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());}
//查詢權限數據
List<IdentityLink> links = taskService
.getIdentityLinksForTask(tasks.get(
0
)
.getId());
System.out.println(
"關系數據量: "
+ links.size());}
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