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Lidarr/NzbDrone.Core/Jobs/Scheduler.cs

79 lines
2.4 KiB

using System;
using System.Threading;
using System.Threading.Tasks;
using NLog;
using NzbDrone.Core.Lifecycle;
using NzbDrone.Core.Messaging.Commands;
using NzbDrone.Core.Messaging.Events;
using Timer = System.Timers.Timer;
using NzbDrone.Common.TPL;
namespace NzbDrone.Core.Jobs
{
public class Scheduler :
IHandle<ApplicationStartedEvent>,
IHandle<ApplicationShutdownRequested>
{
private readonly ITaskManager _taskManager;
private readonly ICommandExecutor _commandExecutor;
private readonly Logger _logger;
private static readonly Timer Timer = new Timer();
private static CancellationTokenSource _cancellationTokenSource;
public Scheduler(ITaskManager taskManager, ICommandExecutor commandExecutor, Logger logger)
{
_taskManager = taskManager;
_commandExecutor = commandExecutor;
_logger = logger;
}
public void Handle(ApplicationStartedEvent message)
{
_cancellationTokenSource = new CancellationTokenSource();
Timer.Interval = 1000 * 30;
Timer.Elapsed += (o, args) => Task.Factory.StartNew(ExecuteCommands, _cancellationTokenSource.Token)
.LogExceptions();
Timer.Start();
}
private void ExecuteCommands()
{
try
{
Timer.Enabled = false;
var tasks = _taskManager.GetPending();
_logger.Trace("Pending Tasks: {0}", tasks.Count);
foreach (var task in tasks)
{
_cancellationTokenSource.Token.ThrowIfCancellationRequested();
try
{
_commandExecutor.PublishCommand(task.TypeName);
}
catch (Exception e)
{
_logger.ErrorException("Error occurred while execution task " + task.TypeName, e);
}
}
}
finally
{
if (!_cancellationTokenSource.IsCancellationRequested)
{
Timer.Enabled = true;
}
}
}
public void Handle(ApplicationShutdownRequested message)
{
_cancellationTokenSource.Cancel(true);
Timer.Stop();
}
}
}