StartFlow 工作流 环节回退
在流程环节回退功能需求比较多，而回退的方式主要有：1：基于两个时间点的回退
2：给予两点间路径的回退。
3：单步回退。
4：最近人工环节的回退。
在实际工作中，第四种使用的非常多，starflow目前只实现聊该种回退方式。以后考虑回实现其它几种方式。
starflow在设计回退是，是通过流程运行轨迹数据来查找最经人工环节。运行轨迹存放在wftransctrl表中，（以后流程图监控也会用到该表数据）存放的数据如下图所示：
http://dl.iteye.com/upload/attachment/199038/4f84ae8a-d9df-32d6-bb55-82f769565853.png
所以在使用环节回退时，必须添加该Filter：
processEngine.addFilter(new TransCtrlFilter());
实例代码：
ProcessEngine processEngine = new Configuration().buildProcessEngine();IProcessDefineService procDefService = processEngine.getProcessDefineService();IProcessInstanceService procInstService = processEngine.getProcessInstanceService();IActivityInstService activityInstService = processEngine.getActivityInstService();IWorkItemService workItemService = processEngine.getWorkItemService();//清除测试数据TestUtil.cleanData(processEngine.getApplicationContext());//部署流程procDefService.deployProcessFile("test/rollback/backFlow.xml");//添加日志filterprocessEngine.addFilter(new LoggerProcessFilter());//保存流程运行轨迹processEngine.addFilter(new TransCtrlFilter());//启动并创建流程procInstService.createAndStartProcess("backFlow", "100001");workItemService.finishWorkItem(1, "100001");activityInstService.rollbackToActivityFroRecentManual(4);//终止流程procInstService.terminateProcess(1);
流程运行日志：
信息: Initializing EHCache CacheManager2010-1-27 10:42:48 com.starit.wf.service.filter.LoggerProcessFilter processCreate信息: 流程【backFlow】创建成功, 流程实例ID = 12010-1-27 10:42:48 com.starit.wf.service.filter.LoggerProcessFilter processStart信息: 流程【backFlow】启动成功, 流程实例ID = 12010-1-27 10:42:48 com.starit.wf.service.filter.LoggerProcessFilter activityStart信息: 环节【开始活动】创建成功, 环节实例ID = 12010-1-27 10:42:48 com.starit.wf.service.filter.LoggerProcessFilter activityComplete信息: 环节【开始活动】执行完成, 环节实例ID = 12010-1-27 10:42:48 com.starit.wf.service.filter.LoggerProcessFilter activityStart信息: 环节【处理】创建成功, 环节实例ID = 22010-1-27 10:42:48 com.starit.wf.service.filter.LoggerProcessFilter activityComplete信息: 环节【处理】执行完成, 环节实例ID = 22010-1-27 10:42:48 com.starit.wf.service.filter.LoggerProcessFilter activityStart信息: 环节【自动环节】创建成功, 环节实例ID = 32010-1-27 10:42:48 com.starit.wf.service.filter.LoggerProcessFilter activityComplete信息: 环节【自动环节】执行完成, 环节实例ID = 32010-1-27 10:42:48 com.starit.wf.service.filter.LoggerProcessFilter activityStart信息: 环节【归档】创建成功, 环节实例ID = 42010-1-27 10:42:48 com.starit.wf.service.filter.LoggerProcessFilter activityTerminal信息: 环节【归档】终止成功, 环节实例ID = 42010-1-27 10:42:48 com.starit.wf.service.filter.LoggerProcessFilter activityStart信息: 环节【处理】创建成功, 环节实例ID = 52010-1-27 10:42:48 com.starit.wf.service.filter.LoggerProcessFilter processTerminal信息: 流程【backFlow】终止成功, 流程实例ID = 1
流程定义：
<?xml version="1.0" encoding="UTF-8"?><ProcessDefine name="backFlow" version="1.1.1" chname="测试回退"><ProcessProperty><limitTime>1440</limitTime><description></description></ProcessProperty> <Activitys> <Activity id="startAct" type="start" name="开始活动"> <splitMode>XOR</splitMode> <description></description> </Activity> <Activity id="A01" type="manual" name="处理"> <limitTime>60</limitTime> <splitMode>XOR</splitMode> <joinMode>XOR</joinMode> <wiMode>single</wiMode> <participantType>process-starter</participantType> <isFreeActivity>false</isFreeActivity><isOnlyLimitedManualActivity>true</isOnlyLimitedManualActivity><freeRangeStrategy>freeWithinProcess</freeRangeStrategy><NextActivities></NextActivities> <description></description> </Activity> <Activity id="A02" type="auto" name="自动环节"> <limitTime>60</limitTime> <splitMode>XOR</splitMode> <joinMode>XOR</joinMode> <wiMode>single</wiMode> <participantType>process-starter</participantType> <isFreeActivity>false</isFreeActivity> <description></description> <finishType>auto</finishType> <callType>asynchronous</callType> <executeAction>com.starit.test.AutoActActionTest</executeAction> </Activity> <Activity id="A03" type="manual" name="归档"> <limitTime>60</limitTime> <splitMode>XOR</splitMode> <joinMode>XOR</joinMode> <wiMode>single</wiMode> <participantType>process-starter</participantType> <isFreeActivity>false</isFreeActivity><isOnlyLimitedManualActivity>true</isOnlyLimitedManualActivity><freeRangeStrategy>freeWithinProcess</freeRangeStrategy><NextActivities></NextActivities> <description></description> </Activity> <Activity id="endAct" type="end" name="结束活动"> <joinMode>XOR</joinMode> <description></description> </Activity> </Activitys> <Transitions> <Transition id="" from="startAct" to="A01" name=""> <isDefault>true</isDefault> </Transition> <Transition id="" from="A01" to="A02" name=""> <isDefault>true</isDefault> </Transition> <Transition id="" from="A02" to="A03" name=""> <isDefault>true</isDefault> </Transition> <Transition id="" from="A03" to="endAct" name=""> <isDefault>true</isDefault> </Transition> </Transitions> </ProcessDefine>
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