jbpm3通过processDefinition.createProcessInstance()为什么能保存ProcessInstance之迷

jbpm3通过processDefinition.createProcessInstance()为什么能保存ProcessInstance之迷
2011年08月01日
　　数据库提交操作是在jbpmcontext.close()方法执行后,事务才提交的. close方法如下: 其中的autoSave()方法如下: 一般人都认为是这里将processInstance保存到数据库.其实这里分2种情况,只有当以
　　jbpmContext.newProcessInstanceForUpdate(processNam e);方式启动流程时,才会执行这里的操作。
　　原因是autoSaveProcessInstances通过processDefinition.createProcessInstance()启动时没有值.
　　autoSave()方法里的循环操作,可以保存流程日志到数据库中.从另一个方面来讲只有以jbpmContext.newProcessInstanceForUpdate(processNam e);方式启动流程时,流程日志表才有数据.
　　那么我们的流程是通过processDefinition.createProcessInstance()方式启动的,为什么也能将processInstance保存到数据库呢.原因见
　　下面的堆栈信息.
　　EntityInsertAction.(Serializable, Object[], Object, Object, EntityPersister, SessionImplementor) line: 34 
　　DefaultSaveOrUpdateEventListener(AbstractSaveEvent Listener).performSaveOrReplicate(Object, EntityKey, EntityPersister, boolean, Object, EventSource, boolean) line: 329 
　　DefaultSaveOrUpdateEventListener(AbstractSaveEvent Listener).performSave(Object, Serializable, EntityPersister, boolean, Object, EventSource, boolean) line: 181 
　　DefaultSaveOrUpdateEventListener(AbstractSaveEvent Listener).saveWithGeneratedId(Object, String, Object, EventSource, boolean) line: 121 
　　DefaultSaveOrUpdateEventListener.saveWithGenerated OrRequestedId(SaveOrUpdateEvent) line: 187 
　　DefaultSaveOrUpdateEventListener.entityIsTransient (SaveOrUpdateEvent) line: 172 
　　DefaultSaveOrUpdateEventListener.performSaveOrUpda te(SaveOrUpdateEvent) line: 94 
　　DefaultSaveOrUpdateEventListener.onSaveOrUpdate(Sa veOrUpdateEvent) line: 70 
　　SessionImpl.fireSaveOrUpdate(SaveOrUpdateEvent) line: 507 
　　SessionImpl.saveOrUpdate(String, Object) line: 499 
　　CascadingAction$1.cascade(EventSource, Object, String, Object, boolean) line: 218 
　　Cascade.cascadeToOne(Object, Type, CascadeStyle, Object, boolean) line: 268 
　　Cascade.cascadeAssociation(Object, Type, CascadeStyle, Object, boolean) line: 216 
　　Cascade.cascadeProperty(Object, Type, CascadeStyle, Object, boolean) line: 169 
　　Cascade.cascade(EntityPersister, Object, Object) line: 130 
　　DefaultSaveEventListener(AbstractSaveEventListener ).cascadeBeforeSave(EventSource, EntityPersister, Object, Object) line: 431 
　　DefaultSaveEventListener(AbstractSaveEventListener ).performSaveOrReplicate(Object, EntityKey, EntityPersister, boolean, Object, EventSource, boolean) line: 265 
　　DefaultSaveEventListener(AbstractSaveEventListener ).performSave(Object, Serializable, EntityPersister, boolean, Object, EventSource, boolean) line: 181 
　　DefaultSaveEventListener(AbstractSaveEventListener ).saveWithGeneratedId(Object, String, Object, EventSource, boolean) line: 121 
　　DefaultSaveEventListener(DefaultSaveOrUpdateEventL istener).saveWithGeneratedOrRequestedId(SaveOrUpdat eEvent) line: 187 
　　DefaultSaveEventListener.saveWithGeneratedOrReques tedId(SaveOrUpdateEvent) line: 33 
　　DefaultSaveEventListener(DefaultSaveOrUpdateEventL istener).entityIsTransient(SaveOrUpdateEvent) line: 172 
　　DefaultSaveEventListener.performSaveOrUpdate(SaveO rUpdateEvent) line: 27 
　　DefaultSaveEventListener(DefaultSaveOrUpdateEventL istener).onSaveOrUpdate(SaveOrUpdateEvent) line: 70 
　　SessionImpl.fireSave(SaveOrUpdateEvent) line: 535 
　　SessionImpl.save(String, Object) line: 523 
　　SessionImpl.save(Object) line: 519 
　　DbPersistenceService.assignId(Object) line: 330
　　Services.assignId(Object) line: 257 
　　ProcessInstance.(ProcessDefinition, Map, String) line: 137 
　　ProcessInstance.(ProcessDefinition) line: 92 
　　ProcessDefinition.createProcessInstance() line: 125 
　　JpdlServiceImpl.createProcess(String) line: 50 
　　JpdlServiceImpl$$FastClassByCGLIB$$f5b03888.invoke (int, Object, Object[]) line: not available 
　　MethodProxy.invoke(Object, Object[]) line: 149 
　　Cglib2AopProxy$CglibMethodInvocation.invokeJoinpoi nt() line: 700 
　　Cglib2AopProxy$CglibMethodInvocation(ReflectiveMet hodInvocation).proceed() line: 149 
　　TransactionInterceptor.invoke(MethodInvocation) line: 106 
　　Cglib2AopProxy$CglibMethodInvocation(ReflectiveMet hodInvocation).proceed() line: 171 
　　ExposeInvocationInterceptor.invoke(MethodInvocatio n) line: 89 
　　Cglib2AopProxy$CglibMethodInvocation(ReflectiveMet hodInvocation).proceed() line: 171 
　　Cglib2AopProxy$DynamicAdvisedInterceptor.intercept (Object, Method, Object[], MethodProxy) line: 635 
　　JpdlServiceImpl$$EnhancerByCGLIB$$ead8b30c.createP rocess(String) line: not available 
　　JpdlProcessTest.testWorkflow() line: 11