/// <summary>
/// 工作线程周期执行任务。
/// </summary>
private async void ThreadWork()
{
while (Running)
{
// 获取目标任务
TTask task;
try
{
task = await GetTaskAsync();
}
#pragma warning disable CA1031 // Do not catch general exception types
catch (Exception ex)
{
OnTaskBuildFaulted(new TaskBuildFaultedEventArgs(new BackgroundTaskException("BackgroundTask build faulted.", ex)));
// 使用空闲休眠时间休眠
TaskWaitHandle.WaitOne(TaskIdleTime);
continue;
}
#pragma warning restore CA1031 // Do not catch general exception types
if (null == task)
{
// 使用空闲休眠时间休眠
TaskWaitHandle.WaitOne(TaskIdleTime);
continue;
}
// 定义任务执行完成事件参数
var taskExecutedArgs = new TaskExecutedEventArgs <TTask>(task);
try
{
OnTaskExecuting(new TaskExecutingEventArgs <TTask>(task));
await ExecuteTaskAsync(task);
}
#pragma warning disable CA1031 // Do not catch general exception types
catch (Exception ex)
{
taskExecutedArgs.IsFaulted = true;
taskExecutedArgs.Exception = new BackgroundTaskException(ex.Message, ex);
}
#pragma warning restore CA1031 // Do not catch general exception types
finally
{
// 通知工作线程已执行完一轮任务。
taskExecutedArgs.CompletedTime = DateTime.Now;
OnTaskExecuted(taskExecutedArgs);
}
// 工作线程周期信号量
TaskWaitHandle.WaitOne(TaskBusyTime);
}
TaskWaitHandle.Dispose();
TaskWaitHandle = null;
// 通知工作线程已退出。
OnTaskThreadExited(new TaskThreadExitedEventArgs());
}
/// <summary>
/// 通知工作线程执行任务完成。
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
/// <exception cref="ObjectDisposedException"></exception>
protected void OnTaskExecuted(object sender, TaskExecutedEventArgs <TTask> e)
{
if (disposed)
{
throw new ObjectDisposedException(nameof(BackgroundTaskThreadService <TTask, TThread>));
}
DecrementWorkThread();
TaskExecuted?.Invoke(sender, e);
}
/// <summary>
/// 通知工作线程执行任务完成。
/// </summary>
/// <param name="e"></param>
protected virtual void OnTaskExecuted(TaskExecutedEventArgs <TTask> e)
{
TaskExecuted?.Invoke(this, e);
}
