/// <summary>
/// 指定异步任务状态，并从指定的状态开始执行,必须由主线程来调用
/// </summary>
/// <param name="state">指定异步任务的状态</param>
/// <param name="asyncTask">异步任务对象</param>
public void ExecuteAsyncTask(AsyncState state, IAsyncTask asyncTask)
{
switch (state)
{
case AsyncState.BeforeAsync:
{
//异步开始前执行，由主线程调用
AsyncState newState = asyncTask.BeforeAsyncTask();
if (newState == AsyncState.BeforeAsync)
{
throw new ApplicationException(string.Format("asyncTask:{0} [BeforeAsyncTask] infinite loop.", asyncTask.GetType().FullName));
}
this.ExecuteAsyncTask(newState, asyncTask);
break;
}
case AsyncState.DoAsync:
{
//需要异步执行，委托线程池来执行该任务
ThreadPool.QueueUserWorkItem(new WaitCallback(AsyncExecute), asyncTask);
break;
}
case AsyncState.AfterAsync:
{
AsyncState newState = asyncTask.AfterAsyncTask();
if (newState == AsyncState.AfterAsync)
{
throw new ApplicationException(string.Format("asyncTask:{0} [AfterAsyncTask] infinite loop.", asyncTask.GetType().FullName));
}
this.ExecuteAsyncTask(newState, asyncTask);
break;
}
default:
{
break;
}
}
}
/// <summary>
/// 指定异步任务状态，并从指定的状态开始执行,必须由主线程来调用
/// </summary>
/// <param name="state">指定异步任务的状态</param>
/// <param name="asyncTask">异步任务对象</param>
public void ExecuteAsyncTask(AsyncState state, IAsyncTask asyncTask)
{
switch (state)
{
case AsyncState.BeforeAsync:
{
//异步开始前执行，由主线程调用
AsyncState newState = asyncTask.BeforeAsyncTask();
if (newState == AsyncState.BeforeAsync)
{
throw new ApplicationException(string.Format("asyncTask:{0} [BeforeAsyncTask] infinite loop.", asyncTask.GetType().FullName));
}
this.ExecuteAsyncTask(newState, asyncTask);
break;
}
case AsyncState.DoAsync:
{
//需要异步执行，委托线程池来执行该任务
ThreadPool.QueueUserWorkItem(new WaitCallback(AsyncExecute), asyncTask);
break;
}
case AsyncState.AfterAsync:
{
AsyncState newState = asyncTask.AfterAsyncTask();
if (newState == AsyncState.AfterAsync)
{
throw new ApplicationException(string.Format("asyncTask:{0} [AfterAsyncTask] infinite loop.", asyncTask.GetType().FullName));
}
this.ExecuteAsyncTask(newState, asyncTask);
break;
}
default:
{
break;
}
}
}
