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                ??碼云GVP開源項目 12k star Uniapp+ElementUI 功能強大 支持多語言、二開方便! 廣告
                為了區別同一個流程定義下的每個流程實例,需要再添加一個業務標識。好比請假的流程都是一樣的(即請假的流程定義是一樣的),但是又不是只有一個人會請假,所以為了區分是哪個人請的假,需要再添加一個業務標識。 ```java /** * 啟動流程時,添加業務標識 */ @Test public void addBusinessKey() { //1、獲取流程引擎 ProcessEngine processEngine = ProcessEngines.getDefaultProcessEngine(); //2、獲取RuntimeService RuntimeService runtimeService = processEngine.getRuntimeService(); //3、啟動流程的過程中,添加businesskey //第一個參數:流程定義的key //第二個參數:業務標識 ProcessInstance instance = runtimeService. startProcessInstanceByKey("myEvection", "1001"); //4、輸出 System.out.println("businessKey==" + instance.getBusinessKey()); //1001 } ``` 執行上面的程序就會在表`act_ru_execution`插入業務標識字段。 ![](https://img.kancloud.cn/54/61/546119ec4e52fccb677a017e368c45b9_1344x174.png) 當啟動流程后將會調用如下幾張表。 ```sql #流程實例執行表,記錄當前流程實例的執行情況 #流程實例執行,如果當前只有一個分支時,一個流程實例只有一條記錄且執行表的主鍵id和流程實例id相同, #如果當前有多個分支正在運行則該執行表中有多條記錄,存在執行表的主鍵和流程實例id不相同的記錄。 #即不論當前有幾個分支總會有一條記錄的執行表的主鍵和流程實例id相同 #一個流程實例運行完成,此表中與流程實例相關的記錄被刪除。 mysql> select * from act_ru_execution where business_key_="1001"; +-------+------+---------------+---------------+------------+---------------... | ID_ | REV_ | PROC_INST_ID_ | BUSINESS_KEY_ | PARENT_ID_ | PROC_DEF_I ... +-------+------+---------------+---------------+------------+---------------... | 30001 | 1 | 30001 | 1001 | NULL | myEvection:1:17504 | ... +-------+------+---------------+---------------+------------+---------------... #任務執行表,記錄當前執行的任務 #啟動流程實例,流程當前執行到第一個任務結點,此表會插入一條記錄表示當前任務的執行情況,如果任務完成則記錄刪除。 mysql> select * from act_ru_task; +-------+------+---------------+---------------+--------------------+--------------+-----------------+--------------+---------------+... | ID_ | REV_ | EXECUTION_ID_ | PROC_INST_ID_ | PROC_DEF_ID_ | NAME_ | PARENT_TASK_ID_ | DESCRIPTION_ | TASK_DEF_K ... +-------+------+---------------+---------------+--------------------+--------------+-----------------+--------------+---------------+... | 22502 | 1 | 20002 | 20001 | myEvection:1:17504 | 部門經理審批 | NULL | NULL | _5 | NULL | 李四 | ... | 27502 | 1 | 25002 | 25001 | myEvection:1:17504 | 部門經理審批 | NULL | NULL | _5 | NULL | 李四 | ... | 30005 | 1 | 30002 | 30001 | myEvection:1:17504 | 創建出差申請 | NULL | NULL | _3 | NULL | 張三 | ... +-------+------+---------------+---------------+--------------------+--------------+-----------------+--------------+---------------+... #任務參與者,記錄當前參與任務的用戶或組 mysql> select * from act_ru_identitylink; +-------+------+-----------+-------------+----------+----------+---------------+--------------+ | ID_ | REV_ | GROUP_ID_ | TYPE_ | USER_ID_ | TASK_ID_ | PROC_INST_ID_ | PROC_DEF_ID_ | +-------+------+-----------+-------------+----------+----------+---------------+--------------+ | 20006 | 1 | NULL | participant | 張三 | NULL | 20001 | NULL | | 22503 | 1 | NULL | participant | 李四 | NULL | 20001 | NULL | | 25006 | 1 | NULL | participant | 張三 | NULL | 25001 | NULL | | 27503 | 1 | NULL | participant | 李四 | NULL | 25001 | NULL | | 30006 | 1 | NULL | participant | 張三 | NULL | 30001 | NULL | +-------+------+-----------+-------------+----------+----------+---------------+--------------+ #流程實例歷史表 #流程實例啟動,會在此表插入一條記錄,流程實例運行完成記錄也不會刪除。 mysql> select * from act_hi_procinst; ... +-------+---------------+---------------+--------------------+---------------------+-----------+-----------+----------------+ ... | ID_ | PROC_INST_ID_ | BUSINESS_KEY_ | PROC_DEF_ID_ | START_TIME_ | END_TIME_ | DURATION_ | START_USER_I ... +-------+---------------+---------------+--------------------+---------------------+-----------+-----------+----------------+ ... | 20001 | 20001 | NULL | myEvection:1:17504 | 2021-10-09 17:00:46 | NULL | NULL | NULL | _2 ... | 25001 | 25001 | NULL | myEvection:1:17504 | 2021-10-09 17:11:55 | NULL | NULL | NULL | _2 ... | 30001 | 30001 | 1001 | myEvection:1:17504 | 2021-10-09 17:36:17 | NULL | NULL | NULL | _2 |... +-------+---------------+---------------+--------------------+---------------------+-----------+-----------+ ... #任務歷史表,記錄所有任務 #開始一個任務,不僅在act_ru_task表插入記錄,也會在歷史任務表插入一條記錄,任務歷史表的主鍵就是任務id,任務完成此表記錄不刪除。 mysql> select * from act_hi_taskinst ; +-------+--------------------+---------------+---------------+---------------+--------------+-----------------+--------------+--... | ID_ | PROC_DEF_ID_ | TASK_DEF_KEY_ | PROC_INST_ID_ | EXECUTION_ID_ | NAME_ | PARENT_TASK_ID_ | DESCRIPTION... +-------+--------------------+---------------+---------------+---------------+--------------+-----------------+--------------+--... | 20005 | myEvection:1:17504 | _3 | 20001 | 20002 | 創建出差申請 | NULL | NULL | NULL | 張三 | ... | 22502 | myEvection:1:17504 | _5 | 20001 | 20002 | 部門經理審批 | NULL | NULL | NULL | 李四 | ... | 25005 | myEvection:1:17504 | _3 | 25001 | 25002 | 創建出差申請 | NULL | NULL | NULL | 張三 | ... | 27502 | myEvection:1:17504 | _5 | 25001 | 25002 | 部門經理審批 | NULL | NULL | NULL | 李四 | ... | 30005 | myEvection:1:17504 | _3 | 30001 | 30002 | 創建出差申請 | NULL | NULL | NULL | 張三 | ... +-------+--------------------+---------------+---------------+---------------+--------------+-----------------+--------------+--... #活動歷史表,記錄所有活動 #活動包括任務,所以此表中不僅記錄了任務,還記錄了流程執行過程的其它活動,比如開始事件、結束事件。 mysql> select * from act_hi_actinst; +-------+--------------------+---------------+---------------+---------+----------+--------------------+--------------+--------... | ID_ | PROC_DEF_ID_ | PROC_INST_ID_ | EXECUTION_ID_ | ACT_ID_ | TASK_ID_ | CALL_PROC_INST_ID_ | ACT_NAME_ | AC. .. +-------+--------------------+---------------+---------------+---------+----------+--------------------+--------------+--------... | 20003 | myEvection:1:17504 | 20001 | 20002 | _2 | NULL | NULL | StartEvent | startEvent | NULL | . .. | 20004 | myEvection:1:17504 | 20001 | 20002 | _3 | 20005 | NULL | 創建出差申請 | userTask | 張三 | ... | 22501 | myEvection:1:17504 | 20001 | 20002 | _5 | 22502 | NULL | 部門經理審批 | userTask | 李四 | ... | 25003 | myEvection:1:17504 | 25001 | 25002 | _2 | NULL | NULL | StartEvent | startEvent | NULL | . .. | 25004 | myEvection:1:17504 | 25001 | 25002 | _3 | 25005 | NULL | 創建出差申請 | userTask | 張三 | ... | 27501 | myEvection:1:17504 | 25001 | 25002 | _5 | 27502 | NULL | 部門經理審批 | userTask | 李四 | ... | 30003 | myEvection:1:17504 | 30001 | 30002 | _2 | NULL | NULL | StartEvent | startEvent | NULL | . .. | 30004 | myEvection:1:17504 | 30001 | 30002 | _3 | 30005 | NULL | 創建出差申請 | userTask | 張三 | ... +-------+--------------------+---------------+---------------+---------+----------+--------------------+--------------+--------... ```
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