/// <summary>
/// 响应任务实例的事件。通过e.getEventType区分事件的类型。
/// </summary>
/// <param name="e">任务实例的事件。</param>
public void onTaskInstanceEventFired(TaskInstanceEvent e)// throws EngineException
{
IWorkflowSession session = e.WorkflowSession;
IProcessInstance proceInst = e.ProcessInstance;
ITaskInstance taskInst = (ITaskInstance)e.Source;
IWorkItem wi = e.WorkItem;
switch (e.EventType)
{
case TaskInstanceEventEnum.BEFORE_TASK_INSTANCE_START:
beforeTaskInstanceStart(session, proceInst, taskInst);
break;
case TaskInstanceEventEnum.AFTER_WORKITEM_CREATED:
afterWorkItemCreated(session, proceInst, taskInst, wi);
break;
case TaskInstanceEventEnum.AFTER_WORKITEM_COMPLETE:
afterWorkItemComplete(session, proceInst, taskInst, wi);
break;
case TaskInstanceEventEnum.AFTER_TASK_INSTANCE_COMPLETE:
afterTaskInstanceCompleted(session, proceInst, taskInst);
break;
default:
break;
}
}
/// <summary>
/// 终止当前TaskInstance，检查是否可以中止当前ActivityInstance，如果可以，
/// 则结束当前ActivityInstance，并触发targetActivityInstance或后继ActivityInstance
/// </summary>
/// <param name="currentSession"></param>
/// <param name="processInstance"></param>
/// <param name="taskInstance"></param>
/// <param name="targetActivityInstance"></param>
public void completeTaskInstance(IWorkflowSession currentSession, IProcessInstance processInstance,
ITaskInstance taskInstance, IActivityInstance targetActivityInstance)
{
//如果TaskInstance处于结束状态，则直接返回
if (taskInstance.State == TaskInstanceStateEnum.COMPLETED || taskInstance.State == TaskInstanceStateEnum.CANCELED)
{
return;
}
if (taskInstance.State == TaskInstanceStateEnum.INITIALIZED)
{
WorkflowProcess process = taskInstance.WorkflowProcess;
throw new EngineException(taskInstance.ProcessInstanceId, process,
taskInstance.TaskId,
"Complete task insatance failed.The state of the task insatnce[id=" + taskInstance.Id + "] is " + taskInstance.State);
}
if (taskInstance.IsSuspended())
{
WorkflowProcess process = taskInstance.WorkflowProcess;
throw new EngineException(taskInstance.ProcessInstanceId, process,
taskInstance.TaskId,
"Complete task insatance failed. The task instance [id=" + taskInstance.Id + "] is suspended");
}
if (targetActivityInstance != null)
{
((TaskInstance)taskInstance).TargetActivityId=targetActivityInstance.Activity.Id;
}
IPersistenceService persistenceService = this.RuntimeContext.PersistenceService;
//第一步，首先结束当前taskInstance
if (!this.taskInstanceCanBeCompleted(currentSession, this.RuntimeContext, processInstance, taskInstance))
{
return;
}
((TaskInstance)taskInstance).State=TaskInstanceStateEnum.COMPLETED;
((TaskInstance)taskInstance).CanBeWithdrawn=false;
((TaskInstance)taskInstance).EndTime=RuntimeContext.CalendarService.getSysDate();
persistenceService.SaveOrUpdateTaskInstance(taskInstance);
//触发相应的事件
TaskInstanceEvent e = new TaskInstanceEvent();
e.Source=taskInstance;
e.WorkflowSession=currentSession;
e.ProcessInstance=processInstance;
e.EventType = TaskInstanceEventEnum.AFTER_TASK_INSTANCE_COMPLETE;
if (this.DefaultTaskInstanceEventListener != null)
{
this.DefaultTaskInstanceEventListener.onTaskInstanceEventFired(e);
}
this.fireTaskInstanceEvent(taskInstance, e);
//第二步，检查ActivityInstance是否可以结束
if (!activityInstanceCanBeCompleted(taskInstance))
{
return;
}
//第三步，尝试结束对应的activityInstance
List<IToken> tokens = persistenceService.FindTokensForProcessInstance(taskInstance.ProcessInstanceId, taskInstance.ActivityId);
// System.out.println("Inside TaskInstance.complete(targetActivityInstance):: tokens.size is "+tokens.Count);
if (tokens == null || tokens.Count == 0)
{
return;//表明activityInstance已经结束了。
}
if (tokens.Count > 1)
{
WorkflowProcess process = taskInstance.WorkflowProcess;
throw new EngineException(taskInstance.ProcessInstanceId, process, taskInstance.TaskId,
"与activityId=" + taskInstance.ActivityId + "对应的token数量(=" + tokens.Count + ")不正确，正确只能为1，因此无法完成complete操作");
}
IToken token = tokens[0];
//stepNumber不相等，不允许执行结束操作。
if (token.StepNumber != taskInstance.StepNumber)
{
return;
}
if (token.IsAlive == false)
{
WorkflowProcess process = taskInstance.WorkflowProcess;
throw new EngineException(taskInstance.ProcessInstanceId, process,
taskInstance.TaskId,
"与activityId=" + taskInstance.ActivityId + "对应的token.alive=false，因此无法完成complete操作");
}
INetInstance netInstance = this.RuntimeContext.KernelManager.getNetInstance(taskInstance.ProcessId, taskInstance.Version);
Object obj = netInstance.getWFElementInstance(taskInstance.ActivityId);
if (obj == null)
{
WorkflowProcess process = taskInstance.WorkflowProcess;
throw new EngineException(taskInstance.ProcessInstanceId, process, taskInstance.TaskId,
"系统没有找到与activityId=" + taskInstance.ActivityId + "对应activityInstance，无法执行complete操作。");
}
token.ProcessInstance = processInstance;
((IActivityInstance)obj).complete(token, targetActivityInstance);
}
public void completeWorkItem(IWorkItem workItem, IActivityInstance targetActivityInstance, String comments)
{
if (workItem.State != WorkItemEnum.RUNNING)
{
TaskInstance thisTaskInst = (TaskInstance)workItem.TaskInstance;
// System.out.println("WorkItem的当前状态为"+this.State+"，不可以执行complete操作。");
throw new EngineException(thisTaskInst.ProcessInstanceId, thisTaskInst.WorkflowProcess, thisTaskInst.TaskId,
"Complete work item failed . The state of the work item [id=" + workItem.Id + "] is " + workItem.State);
}
if (workItem.TaskInstance.IsSuspended())
{
TaskInstance thisTaskInst = (TaskInstance)workItem.TaskInstance;
WorkflowProcess process = thisTaskInst.WorkflowProcess;
throw new EngineException(thisTaskInst.ProcessInstanceId, process, thisTaskInst.TaskId,
"Complete work item failed. The correspond task instance [id=" + thisTaskInst.Id + "] is suspended");
}
IPersistenceService persistenceService = RuntimeContext.PersistenceService;
((WorkItem)workItem).Comments=comments;
((WorkItem)workItem).State = WorkItemEnum.COMPLETED;
((WorkItem)workItem).EndTime=RuntimeContext.CalendarService.getSysDate();
persistenceService.SaveOrUpdateWorkItem(workItem);
// 触发AFTER_WORKITEM_COMPLETE事件
TaskInstanceEvent e = new TaskInstanceEvent();
e.Source=workItem.TaskInstance;
e.WorkflowSession=((IWorkflowSessionAware)workItem).CurrentWorkflowSession;
e.ProcessInstance=((TaskInstance)workItem.TaskInstance).AliveProcessInstance;
e.EventType = TaskInstanceEventEnum.AFTER_WORKITEM_COMPLETE;
if (this.DefaultTaskInstanceEventListener != null)
{
this.DefaultTaskInstanceEventListener.onTaskInstanceEventFired(e);
}
this.fireTaskInstanceEvent(workItem.TaskInstance, e);
((TaskInstance)workItem.TaskInstance).complete(targetActivityInstance);
}
public void abortTaskInstanceEx(IWorkflowSession currentSession, IProcessInstance processInstance,
ITaskInstance thisTaskInst, String targetActivityId)
{
// 如果TaskInstance处于结束状态，则直接返回
if (thisTaskInst.State == TaskInstanceStateEnum.COMPLETED || thisTaskInst.State == TaskInstanceStateEnum.CANCELED)
{
return;
}
// Initialized状态的TaskInstance也可以中止，20090830
// if (taskInstance.State == ITaskInstance.INITIALIZED) {
// WorkflowProcess process = taskInstance.getWorkflowProcess();
// throw new EngineException(taskInstance.getProcessInstanceId(),
// process,
// taskInstance.getTaskId(),
// "Complete task insatance failed.The state of the task insatnce[id=" +
// taskInstance.getId() + "] is " + taskInstance.State);
// }
if (thisTaskInst.IsSuspended())
{
WorkflowProcess process = thisTaskInst.WorkflowProcess;
throw new EngineException(thisTaskInst.ProcessInstanceId,
process, thisTaskInst.TaskId,
"Abort task insatance failed. The task instance [id="
+ thisTaskInst.Id + "] is suspended");
}
//
IPersistenceService persistenceService = this.RuntimeContext.PersistenceService;
WorkflowProcess workflowProcess = thisTaskInst.WorkflowProcess;
List<IToken> allTokens = null;
List<String> aliveActivityIdsAfterJump = new List<String>();
if (targetActivityId != null)
{
String thisActivityId = thisTaskInst.ActivityId;
Boolean isInSameLine = workflowProcess.isInSameLine(thisActivityId, targetActivityId);
if (isInSameLine)
{
this.abortTaskInstance(currentSession, processInstance, thisTaskInst, targetActivityId);
}
//合法性检查
allTokens = persistenceService.FindTokensForProcessInstance(thisTaskInst.ProcessInstanceId, null);
aliveActivityIdsAfterJump.Add(targetActivityId);
for (int i = 0; allTokens != null && i < allTokens.Count; i++)
{
IToken tokenTmp = allTokens[i];
IWFElement workflowElement = workflowProcess.findWFElementById(tokenTmp.NodeId);
if ((workflowElement is Activity) && !workflowElement.Id.Equals(thisActivityId))
{
aliveActivityIdsAfterJump.Add(workflowElement.Id);
if (workflowProcess.isReachable(targetActivityId, workflowElement.Id)
|| workflowProcess.isReachable(workflowElement.Id, targetActivityId))
{
throw new EngineException(
thisTaskInst.ProcessInstanceId,
thisTaskInst.WorkflowProcess,
thisTaskInst.TaskId,
"Abort refused because of the business-logic conflict!");
}
}
}
//1）检查是否在同一个“执行线”上(不做该检查，20091008)
// if (!isInSameLine) {
// throw new EngineException(
// taskInstance.getProcessInstanceId(),
// taskInstance.getWorkflowProcess(),
// taskInstance.getTaskId(),
// "Jumpto refused because of the current activitgy and the target activity are NOT in the same 'Execution Thread'.");
// }
}
INetInstance netInstance = this.RuntimeContext.KernelManager.getNetInstance(workflowProcess.Id, thisTaskInst.Version);
IActivityInstance targetActivityInstance = null;
if (targetActivityId != null)
{
targetActivityInstance = (IActivityInstance)netInstance.getWFElementInstance(targetActivityId);
}
IActivityInstance thisActivityInstance = (IActivityInstance)netInstance.getWFElementInstance(thisTaskInst.ActivityId);
if (thisActivityInstance == null)
{
WorkflowProcess process = thisTaskInst.WorkflowProcess;
throw new EngineException(thisTaskInst.ProcessInstanceId, process, thisTaskInst.TaskId,
"系统没有找到与activityId=" + thisTaskInst.ActivityId + "对应activityInstance，无法执行abort操作。");
}
if (targetActivityInstance != null)
{
((TaskInstance)thisTaskInst).TargetActivityId=targetActivityInstance.Activity.Id;
}
// 第一步，首先Abort当前taskInstance
persistenceService.AbortTaskInstance((TaskInstance)thisTaskInst);
// 触发相应的事件
TaskInstanceEvent e = new TaskInstanceEvent();
e.Source=thisTaskInst;
e.WorkflowSession=currentSession;
e.ProcessInstance=processInstance;
e.EventType = TaskInstanceEventEnum.AFTER_TASK_INSTANCE_COMPLETE;
if (this.DefaultTaskInstanceEventListener != null)
{
this.DefaultTaskInstanceEventListener.onTaskInstanceEventFired(e);
}
this.fireTaskInstanceEvent(thisTaskInst, e);
// 第二步，检查ActivityInstance是否可以结束
if (!activityInstanceCanBeCompleted(thisTaskInst))
{
return;
}
// 第三步，尝试结束对应的activityInstance
List<IToken> tokens = persistenceService.FindTokensForProcessInstance(thisTaskInst.ProcessInstanceId, thisTaskInst.ActivityId);
// System.out.println("Inside TaskInstance.complete(targetActivityInstance):: tokens.size is "+tokens.size());
if (tokens == null || tokens.Count == 0)
{
return;// 表明activityInstance已经结束了。
}
if (tokens.Count > 1)
{
WorkflowProcess process = thisTaskInst.WorkflowProcess;
throw new EngineException(thisTaskInst.ProcessInstanceId, process, thisTaskInst.TaskId,
"与activityId=" + thisTaskInst.ActivityId + "对应的token数量(=" + tokens.Count + ")不正确，正确只能为1，因此无法完成complete操作");
}
IToken token = tokens[0];
// stepNumber不相等，不允许执行结束操作。
if (token.StepNumber != thisTaskInst.StepNumber)
{
return;
}
if (token.IsAlive == false)
{
WorkflowProcess process = thisTaskInst.WorkflowProcess;
throw new EngineException(thisTaskInst.ProcessInstanceId, process, thisTaskInst.TaskId,
"与activityId=" + thisTaskInst.ActivityId + "对应的token.alive=false，因此无法完成complete操作");
}
token.ProcessInstance = processInstance;
//调整token布局
if (targetActivityId != null)
{
List<Synchronizer> allSynchronizersAndEnds = new List<Synchronizer>();
allSynchronizersAndEnds.AddRange(workflowProcess.Synchronizers);
allSynchronizersAndEnds.AddRange((IEnumerable<Synchronizer>)workflowProcess.EndNodes.ToArray());
//allSynchronizersAndEnds.AddRange((List<Synchronizer>));
for (int i = 0; i < allSynchronizersAndEnds.Count; i++)
{
Synchronizer synchronizer = allSynchronizersAndEnds[i];
if (synchronizer.Name.Equals("Synchronizer4"))
{
//System.out.println(synchronizer.Name);
}
int volumn = 0;
if (synchronizer is EndNode)
{
volumn = synchronizer.EnteringTransitions.Count;
}
else
{
volumn = synchronizer.EnteringTransitions.Count * synchronizer.LeavingTransitions.Count;
}
IToken tokenTmp = new Token();
tokenTmp.NodeId = synchronizer.Id;
tokenTmp.IsAlive = false;
tokenTmp.ProcessInstanceId = thisTaskInst.ProcessInstanceId;
tokenTmp.StepNumber = -1;
List<String> incomingTransitionIds = new List<String>();
Boolean reachable = false;
List<Transition> enteringTrans = synchronizer.EnteringTransitions;
for (int m = 0; m < aliveActivityIdsAfterJump.Count; m++)
{
String aliveActivityId = aliveActivityIdsAfterJump[m];
if (workflowProcess.isReachable(aliveActivityId, synchronizer.Id))
{
Transition trans = null;
reachable = true;
for (int j = 0; j < enteringTrans.Count; j++)
{
trans = enteringTrans[j];
Node fromNode = (Node)trans.FromNode;
if (workflowProcess.isReachable(aliveActivityId, fromNode.Id))
{
if (!incomingTransitionIds.Contains(trans.Id))
{
incomingTransitionIds.Add(trans.Id);
}
}
}
}
}
if (reachable)
{
tokenTmp.Value = volumn - (incomingTransitionIds.Count * volumn / enteringTrans.Count);
IToken virtualToken = getJoinInfo(allTokens, synchronizer.Id);
if (virtualToken != null)
{
persistenceService.DeleteTokensForNode(thisTaskInst.ProcessInstanceId, synchronizer.Id);
}
if (tokenTmp.Value != 0)
{
tokenTmp.ProcessInstance = processInstance;
persistenceService.SaveOrUpdateToken(tokenTmp);
}
}
}
}
thisActivityInstance.complete(token, targetActivityInstance);
}
/// <summary>
/// 触发task instance相关的事件
/// </summary>
/// <param name="taskInstance"></param>
/// <param name="e"></param>
protected void fireTaskInstanceEvent(ITaskInstance taskInstance, TaskInstanceEvent e)
{
Task task = taskInstance.Task;
if (task == null)
{
return;
}
List<EventListener> listeners = task.EventListeners;
for (int i = 0; i < listeners.Count; i++)
{
EventListener listener = (EventListener)listeners[i];
Object obj = RuntimeContext.getBeanByName(listener.ClassName);
if (obj != null && (obj is ITaskInstanceEventListener))
{
((ITaskInstanceEventListener)obj).onTaskInstanceEventFired(e);
}
}
}
/// <summary>
/// 启动TaskInstance。
/// 该方法定义为final,不允许子类扩展。
/// </summary>
public void startTaskInstance(IWorkflowSession currentSession, IProcessInstance processInstance, ITaskInstance taskInstance)
{
//触发事件
TaskInstanceEvent e = new TaskInstanceEvent();
e.Source=taskInstance;
e.WorkflowSession=currentSession;
e.ProcessInstance=processInstance;
e.EventType = TaskInstanceEventEnum.BEFORE_TASK_INSTANCE_START;
if (DefaultTaskInstanceEventListener != null)
{
DefaultTaskInstanceEventListener.onTaskInstanceEventFired(e);
}
this.fireTaskInstanceEvent(taskInstance, e);
((TaskInstance)taskInstance).State=TaskInstanceStateEnum.RUNNING;
((TaskInstance)taskInstance).StartedTime=this.RuntimeContext.CalendarService.getSysDate();
this.RuntimeContext.PersistenceService.SaveOrUpdateTaskInstance(taskInstance);
Task task = taskInstance.Task;
String taskInstanceRunnerName = null;
ITaskInstanceRunner taskInstanceRunner = null;
TaskTypeEnum taskType = task.TaskType;
taskInstanceRunnerName = task.TaskInstanceRunner;
if (!String.IsNullOrEmpty(taskInstanceRunnerName.Trim()))
{
IBeanFactory beanFactory = this.RuntimeContext.BeanFactory;
taskInstanceRunner = (ITaskInstanceRunner)beanFactory.GetBean(taskInstanceRunnerName);
}
if (taskInstanceRunner == null)
{
if (TaskTypeEnum.FORM == taskType)
{
taskInstanceRunnerName = processInstance.WorkflowProcess.FormTaskInstanceRunner;
}
else if (TaskTypeEnum.TOOL == taskType)
{
taskInstanceRunnerName = processInstance.WorkflowProcess.ToolTaskInstanceRunner;
}
else if (TaskTypeEnum.SUBFLOW == taskType)
{
taskInstanceRunnerName = processInstance.WorkflowProcess.SubflowTaskInstanceRunner;
}
if (!String.IsNullOrEmpty(taskInstanceRunnerName.Trim()))
{
IBeanFactory beanFactory = this.RuntimeContext.BeanFactory;
taskInstanceRunner = (ITaskInstanceRunner)beanFactory.GetBean(taskInstanceRunnerName);
}
}
if (taskInstanceRunner == null)
{
if (TaskTypeEnum.FORM == taskType)
{
taskInstanceRunner = DefaultFormTaskInstanceRunner;
}
else if (TaskTypeEnum.TOOL == taskType)
{
taskInstanceRunner = DefaultToolTaskInstanceRunner;
}
else if (TaskTypeEnum.SUBFLOW == taskType)
{
taskInstanceRunner = DefaultSubflowTaskInstanceRunner;
}
}
if (taskInstanceRunner != null)
{
taskInstanceRunner.run(currentSession, this.RuntimeContext, processInstance, taskInstance);
}
else
{
WorkflowProcess process = taskInstance.WorkflowProcess;
throw new EngineException(taskInstance.ProcessInstanceId, process,
taskInstance.TaskId,
"无法获取TaskInstanceRunner,TaskId=" + task.Id + ", taskType=" + taskInstance.TaskType);
}
}
public WorkItem createWorkItem(IWorkflowSession currentSession, IProcessInstance processInstance, ITaskInstance taskInstance, String actorId)
{
IPersistenceService persistenceService = this.RuntimeContext.PersistenceService;
WorkItem wi = new WorkItem();
wi.TaskInstance=taskInstance;
wi.ActorId=actorId;
wi.State=WorkItemEnum.INITIALIZED;
wi.CreatedTime = this.RuntimeContext.CalendarService.getSysDate();
wi.RuntimeContext = this.RuntimeContext;
wi.CurrentWorkflowSession=currentSession;
//保存到数据库
persistenceService.SaveOrUpdateWorkItem(wi);
//触发事件
//触发相应的事件
TaskInstanceEvent e = new TaskInstanceEvent();
e.Source=taskInstance;
e.WorkItem=wi;
e.WorkflowSession=currentSession;
e.ProcessInstance=processInstance;
e.EventType = TaskInstanceEventEnum.AFTER_WORKITEM_CREATED;
if (this.DefaultTaskInstanceEventListener != null)
{
this.DefaultTaskInstanceEventListener.onTaskInstanceEventFired(e);
}
this.fireTaskInstanceEvent(taskInstance, e);
return wi;
}
/// <summary>
/// 中止当前的TaskInstance,并使得流程流转到指定的环节。
/// </summary>
/// <param name="currentSession"></param>
/// <param name="processInstance"></param>
/// <param name="taskInstance"></param>
/// <param name="targetActivityId"></param>
public void abortTaskInstance(IWorkflowSession currentSession,
IProcessInstance processInstance, ITaskInstance taskInstance,
String targetActivityId)
{
// 如果TaskInstance处于结束状态，则直接返回
if (taskInstance.State == TaskInstanceStateEnum.COMPLETED || taskInstance.State == TaskInstanceStateEnum.CANCELED)
{
return;
}
// Initialized状态的TaskInstance也可以中止，20090830
// if (taskInstance.State == ITaskInstance.INITIALIZED) {
// WorkflowProcess process = taskInstance.getWorkflowProcess();
// throw new EngineException(taskInstance.getProcessInstanceId(),
// process,
// taskInstance.getTaskId(),
// "Complete task insatance failed.The state of the task insatnce[id=" +
// taskInstance.getId() + "] is " + taskInstance.State);
// }
if (taskInstance.IsSuspended())
{
WorkflowProcess process = taskInstance.WorkflowProcess;
throw new EngineException(taskInstance.ProcessInstanceId,
process, taskInstance.TaskId,
"Abort task insatance failed. The task instance [id="
+ taskInstance.Id + "] is suspended");
}
// 1）检查是否在同一个“执行线”上
WorkflowProcess workflowProcess = taskInstance.WorkflowProcess;
if (targetActivityId != null)
{
String thisActivityId = taskInstance.ActivityId;
Boolean isInSameLine = workflowProcess.isInSameLine(thisActivityId,
targetActivityId);
if (!isInSameLine)
{
throw new EngineException(
taskInstance.ProcessInstanceId,
taskInstance.WorkflowProcess,
taskInstance.TaskId,
"Jumpto refused because of the current activitgy and the target activity are NOT in the same 'Execution Thread'.");
}
}
INetInstance netInstance = this.RuntimeContext.KernelManager.getNetInstance(workflowProcess.Id, taskInstance.Version);
IActivityInstance targetActivityInstance = (IActivityInstance)netInstance.getWFElementInstance(targetActivityId);
IActivityInstance thisActivityInstance = (IActivityInstance)netInstance.getWFElementInstance(taskInstance.ActivityId);
if (thisActivityInstance == null)
{
WorkflowProcess process = taskInstance.WorkflowProcess;
throw new EngineException(taskInstance.ProcessInstanceId, process, taskInstance.TaskId,
"系统没有找到与activityId=" + taskInstance.ActivityId + "对应activityInstance，无法执行abort操作。");
}
if (targetActivityInstance != null)
{
((TaskInstance)taskInstance).TargetActivityId=targetActivityInstance.Activity.Id;
}
IPersistenceService persistenceService = this.RuntimeContext.PersistenceService;
// 第一步，首先Abort当前taskInstance
persistenceService.AbortTaskInstance((TaskInstance)taskInstance);
// 触发相应的事件
TaskInstanceEvent e = new TaskInstanceEvent();
e.Source=taskInstance;
e.WorkflowSession=currentSession;
e.ProcessInstance=processInstance;
e.EventType = TaskInstanceEventEnum.AFTER_TASK_INSTANCE_COMPLETE;
if (this.DefaultTaskInstanceEventListener != null)
{
this.DefaultTaskInstanceEventListener.onTaskInstanceEventFired(e);
}
this.fireTaskInstanceEvent(taskInstance, e);
// 第二步，检查ActivityInstance是否可以结束
if (!activityInstanceCanBeCompleted(taskInstance))
{
return;
}
// 第三步，尝试结束对应的activityInstance
List<IToken> tokens = persistenceService.FindTokensForProcessInstance(taskInstance.ProcessInstanceId, taskInstance.ActivityId);
// System.out.println("Inside TaskInstance.complete(targetActivityInstance):: tokens.size is "+tokens.size());
if (tokens == null || tokens.Count == 0)
{
return;// 表明activityInstance已经结束了。
}
if (tokens.Count > 1)
{
WorkflowProcess process = taskInstance.WorkflowProcess;
throw new EngineException(taskInstance.ProcessInstanceId, process, taskInstance.TaskId,
"与activityId=" + taskInstance.ActivityId + "对应的token数量(=" + tokens.Count + ")不正确，正确只能为1，因此无法完成complete操作");
}
IToken token = tokens[0];
// stepNumber不相等，不允许执行结束操作。
if (token.StepNumber != taskInstance.StepNumber)
{
return;
}
if (token.IsAlive == false)
{
WorkflowProcess process = taskInstance.WorkflowProcess;
throw new EngineException(taskInstance.ProcessInstanceId, process, taskInstance.TaskId,
"与activityId=" + taskInstance.ActivityId + "对应的token.alive=false，因此无法完成complete操作");
}
token.ProcessInstance = processInstance;
thisActivityInstance.complete(token, targetActivityInstance);
}
