mirror of https://github.com/abpframework/abp.git
Halil İbrahim Kalkan
6 years ago
committed by
GitHub
GitHub
11 changed files with 188 additions and 54 deletions
@ -0,0 +1,127 @@ |
|||
using System; |
|||
using System.Threading; |
|||
using System.Threading.Tasks; |
|||
using Microsoft.Extensions.Logging; |
|||
using Microsoft.Extensions.Logging.Abstractions; |
|||
using Volo.Abp.DependencyInjection; |
|||
using Volo.Abp.ExceptionHandling; |
|||
|
|||
namespace Volo.Abp.Threading |
|||
{ |
|||
/// <summary>
|
|||
/// A robust timer implementation that ensures no overlapping occurs. It waits exactly specified <see cref="Period"/> between ticks.
|
|||
/// </summary>
|
|||
public class AbpAsyncTimer : ITransientDependency |
|||
{ |
|||
/// <summary>
|
|||
/// This func is raised periodically according to Period of Timer.
|
|||
/// </summary>
|
|||
public Func<AbpAsyncTimer, Task> Elapsed = _ => Task.CompletedTask; |
|||
|
|||
/// <summary>
|
|||
/// Task period of timer (as milliseconds).
|
|||
/// </summary>
|
|||
public int Period { get; set; } |
|||
|
|||
/// <summary>
|
|||
/// Indicates whether timer raises Elapsed event on Start method of Timer for once.
|
|||
/// Default: False.
|
|||
/// </summary>
|
|||
public bool RunOnStart { get; set; } |
|||
|
|||
public ILogger<AbpAsyncTimer> Logger { get; set; } |
|||
|
|||
public IExceptionNotifier ExceptionNotifier { get; set; } |
|||
|
|||
private readonly Timer _taskTimer; |
|||
private volatile bool _performingTasks; |
|||
private volatile bool _isRunning; |
|||
|
|||
public AbpAsyncTimer() |
|||
{ |
|||
ExceptionNotifier = NullExceptionNotifier.Instance; |
|||
Logger = NullLogger<AbpAsyncTimer>.Instance; |
|||
|
|||
_taskTimer = new Timer( |
|||
TimerCallBack, |
|||
null, |
|||
Timeout.Infinite, |
|||
Timeout.Infinite |
|||
); |
|||
} |
|||
|
|||
public void Start(CancellationToken cancellationToken = default) |
|||
{ |
|||
if (Period <= 0) |
|||
{ |
|||
throw new AbpException("Period should be set before starting the timer!"); |
|||
} |
|||
|
|||
lock (_taskTimer) |
|||
{ |
|||
_taskTimer.Change(RunOnStart ? 0 : Period, Timeout.Infinite); |
|||
_isRunning = true; |
|||
} |
|||
} |
|||
|
|||
public void Stop(CancellationToken cancellationToken = default) |
|||
{ |
|||
lock (_taskTimer) |
|||
{ |
|||
_taskTimer.Change(Timeout.Infinite, Timeout.Infinite); |
|||
while (_performingTasks) |
|||
{ |
|||
Monitor.Wait(_taskTimer); |
|||
} |
|||
|
|||
_isRunning = false; |
|||
} |
|||
} |
|||
|
|||
/// <summary>
|
|||
/// This method is called by _taskTimer.
|
|||
/// </summary>
|
|||
/// <param name="state">Not used argument</param>
|
|||
private void TimerCallBack(object state) |
|||
{ |
|||
lock (_taskTimer) |
|||
{ |
|||
if (!_isRunning || _performingTasks) |
|||
{ |
|||
return; |
|||
} |
|||
|
|||
_taskTimer.Change(Timeout.Infinite, Timeout.Infinite); |
|||
_performingTasks = true; |
|||
} |
|||
|
|||
_ = Timer_Elapsed(); |
|||
} |
|||
|
|||
private async Task Timer_Elapsed() |
|||
{ |
|||
try |
|||
{ |
|||
await Elapsed(this); |
|||
} |
|||
catch(Exception ex) |
|||
{ |
|||
Logger.LogException(ex); |
|||
await ExceptionNotifier.NotifyAsync(ex); |
|||
} |
|||
finally |
|||
{ |
|||
lock (_taskTimer) |
|||
{ |
|||
_performingTasks = false; |
|||
if (_isRunning) |
|||
{ |
|||
_taskTimer.Change(Period, Timeout.Infinite); |
|||
} |
|||
|
|||
Monitor.Pulse(_taskTimer); |
|||
} |
|||
} |
|||
} |
|||
} |
|||
} |
|||
Loading…
Reference in new issue