流程引擎UML

ActivityFinishListener

IProcessInstanceService

IWorkItemService

单一分支

AbstractProcessListener

onApplicationEvent（ApplicationContextEvent event） processStart(ProcessStartEvent event)processEnd(ProcessFinishEvent event)activityCreate(ActivityCreateEvent event)activityStart(ActivityStartEvent event)activityEnd(ActivityFinishEvent event)

ProcessInstanceService

final ProcessEngine processEngineProcessInstance ProcessInstanceService(ProcessEngine processEngine)// 流程启动前触发事件//创建流程实例createProcess(long processInstId) startProcess(long processInstId)span style=\"font-size: inherit;\

ApplicationContextEvent

 ApplicationContextEvent(ApplicationContext source)

根据分支策略不同，创建环节实例，发布开始环节事件

ProcessFinishEvent

ProcessFinishEvent(ProcessEngine processEngine)

ActivityCreateEvent

ActivityInst activityInstActivityCreateEvent(ProcessEngine processEngine)

ActivityStartListener

activityStart(ActivityStartEvent event) {//1.人工环节//处理工作项相关//环节触发事件//2.子流程创建子流程实例。。。//发布流程结束事件（人工环节除外，需要手动关闭）}

ProcessFinishListener

processEnd(ProcessFinishEvent event){//执行流程完成后触发事件// 判断当前流程是否为子流程。//是子流程且是同步策略，则发布环节结束事件// 异步子流程，不再需要发布结束事件}

ActivityStartEvent

ActivityInst activityInstActivityElement activityXmlActivityStartEvent(ProcessEngine processEngine)

ProcessStartListener

多路分支

ProcessStartEvent

ProcessStartEvent(ProcessEngine processEngine)

ProcessEngine

 IProcessDefineService processDefineService;  IProcessInstanceService processInstanceService;  IActivityInstService activityInstService;  IFreeFlowService freeFlowService;  IWorkItemService workItemService;  IWIConsignationService consignationService;  ApplicationContext applicationContext;   TransactionTemplate transactionTemplate;   TransactionTemplate globalTransactionTemplate;   Configuration configuration; // ScriptEngine Manager  ScriptEngineManager scriptEngineManager; @SuppressWarnings(\"rawtypes\

IProcessDefineService

全部分支

AbstractFlowEvent

ProcessEngine processEngineProcessInstance processInstanceProcessElement processElement;ActivityElement preActivityXml;IProcessInstanceRepository procInstRepIActivityInstRepository actInstRepIWorkItemRepository workItemRep 

实现

继承

关联

ProcessDefineParser

//解析XML//解析环节，解析轨迹，解析连线。。。//封装在ProcessElementProcessElement createProcessXml(String xml)

用户创建流程

IActivityInstService

ActivityCreateListener 

FlowService

FlowServiceImpl

ProcessEngineBuilder

ProcessEngine processEngine

//初始化创建引擎ProcessEngine buildProcessEngine()

ActivityFinishEvent

 ActivityInst activityInst; ActivityFinishEvent(ProcessEngine processEngine)

ActivityInstService

聚合

ApplicationListeneronApplicationEvent(E event)