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https://github.com/Sonarr/Sonarr.git
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304 lines
10 KiB
C#
304 lines
10 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Diagnostics;
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using System.Linq;
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using System.Threading;
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using NLog;
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using NzbDrone.Core.Model.Notification;
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using NzbDrone.Core.Repository;
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using SubSonic.Repository;
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namespace NzbDrone.Core.Providers.Jobs
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{
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public class JobProvider
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{
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private static readonly Logger Logger = LogManager.GetCurrentClassLogger();
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private readonly IRepository _repository;
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private readonly NotificationProvider _notificationProvider;
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private readonly IEnumerable<IJob> _jobs;
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private static readonly object ExecutionLock = new object();
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private Thread _jobThread;
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private static bool _isRunning;
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private static readonly List<Tuple<Type, Int32>> Queue = new List<Tuple<Type, int>>();
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private ProgressNotification _notification;
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public JobProvider(IRepository repository, NotificationProvider notificationProvider, IEnumerable<IJob> jobs)
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{
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_repository = repository;
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_notificationProvider = notificationProvider;
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_jobs = jobs;
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}
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public JobProvider() { }
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/// <summary>
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/// Returns a list of all registered jobs
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/// </summary>
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/// <returns></returns>
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public virtual List<JobSetting> All()
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{
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return _repository.All<JobSetting>().ToList();
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}
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/// <summary>
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/// Creates/Updates settings for a job
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/// </summary>
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/// <param name="settings">Settings to be created/updated</param>
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public virtual void SaveSettings(JobSetting settings)
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{
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if (settings.Id == 0)
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{
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Logger.Debug("Adding job settings for {0}", settings.Name);
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_repository.Add(settings);
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}
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else
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{
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Logger.Debug("Updating job settings for {0}", settings.Name);
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_repository.Update(settings);
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}
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}
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/// <summary>
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/// Iterates through all registered jobs and executed any that are due for an execution.
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/// </summary>
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/// <returns>True if ran, false if skipped</returns>
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public virtual bool RunScheduled()
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{
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lock (ExecutionLock)
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{
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if (_isRunning)
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{
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Logger.Info("Another instance of this job is already running. Ignoring request.");
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return false;
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}
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_isRunning = true;
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}
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try
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{
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var pendingJobs = All().Where(
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t => t.Enable &&
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(DateTime.Now - t.LastExecution) > TimeSpan.FromMinutes(t.Interval)
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);
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foreach (var pendingTimer in pendingJobs)
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{
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var timerClass = _jobs.Where(t => t.GetType().ToString() == pendingTimer.TypeName).FirstOrDefault();
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Execute(timerClass.GetType());
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}
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}
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finally
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{
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_isRunning = false;
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}
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return true;
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}
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/// <summary>
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/// Starts the execution of a job asynchronously
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/// </summary>
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/// <param name="jobType">Type of the job that should be executed.</param>
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/// <param name="queueAllowed">If the job is allowed to be queued in case another task is aready running.</param>
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/// <param name="targetId">The targetId could be any Id parameter eg. SeriesId. it will be passed to the job implementation
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/// to allow it to filter it's target of execution.</param>
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/// <returns>True if ran, false if skipped</returns>
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/// <remarks>Job is only added to the queue if same job with the same targetId doesn't already exist in the queue.</remarks>
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public virtual bool QueueJob(Type jobType, int targetId = 0)
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{
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Logger.Debug("Adding job {0} ->{1} to the queue", jobType, targetId);
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lock (Queue)
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{
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var queueTuple = new Tuple<Type, int>(jobType, targetId);
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if (Queue.Contains(queueTuple))
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{
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Logger.Info("Job {0} ->{1} already exists in queue. Skipping.", jobType, targetId);
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return false;
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}
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Queue.Add(queueTuple);
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Logger.Debug("Job {0} ->{1} added to the queue", jobType, targetId);
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}
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lock (ExecutionLock)
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{
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if (_isRunning)
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{
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Logger.Trace("Queue is already running. Ignoreing request.");
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return true;
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}
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}
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if (_jobThread == null || !_jobThread.IsAlive)
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{
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Logger.Trace("Initializing queue processor thread");
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ThreadStart starter = () =>
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{
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try
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{
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ProcessQueue();
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}
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finally
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{
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_isRunning = false;
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}
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};
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_jobThread = new Thread(starter) { Name = "JobQueueThread", Priority = ThreadPriority.BelowNormal };
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_jobThread.Start();
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}
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else
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{
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Logger.Warn("Thread still active. Ignoring request.");
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}
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return true;
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}
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/// <summary>
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/// Starts processing of queue.
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/// </summary>
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private void ProcessQueue()
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{
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Tuple<Type, int> job = null;
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try
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{
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lock (Queue)
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{
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if (Queue.Count != 0)
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{
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job = Queue[0];
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}
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}
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if (job != null)
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{
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Execute(job.Item1, job.Item2);
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}
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}
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catch (Exception e)
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{
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Logger.FatalException("An error has occured while processing queued job.", e);
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}
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finally
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{
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if (job != null)
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{
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Queue.Remove(job);
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}
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}
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//Try to find next job is last run found a job.
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if (job != null)
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{
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ProcessQueue();
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}
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else
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{
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Logger.Debug("Finished processing jobs in the queue.");
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}
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return;
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}
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/// <summary>
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/// Executes the job
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/// </summary>
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/// <param name="jobType">Type of the job that should be executed</param>
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/// <param name="targetId">The targetId could be any Id parameter eg. SeriesId. it will be passed to the timer implementation
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/// to allow it to filter it's target of execution</param>
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private void Execute(Type jobType, int targetId = 0)
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{
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var timerClass = _jobs.Where(t => t.GetType() == jobType).FirstOrDefault();
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if (timerClass == null)
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{
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Logger.Error("Unable to locate implementation for '{0}'. Make sure its properly registered.", jobType.ToString());
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return;
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}
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var settings = All().Where(j => j.TypeName == jobType.ToString()).FirstOrDefault();
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using (_notification = new ProgressNotification(timerClass.Name))
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{
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try
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{
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Logger.Debug("Starting job '{0}'. Last execution {1}", settings.Name, settings.LastExecution);
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settings.LastExecution = DateTime.Now;
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var sw = Stopwatch.StartNew();
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_notificationProvider.Register(_notification);
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timerClass.Start(_notification, targetId);
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_notification.Status = ProgressNotificationStatus.Completed;
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settings.Success = true;
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sw.Stop();
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Logger.Debug("Job '{0}' successfully completed in {1} seconds", timerClass.Name, sw.Elapsed.Minutes,
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sw.Elapsed.Seconds);
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}
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catch (Exception e)
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{
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settings.Success = false;
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Logger.ErrorException("An error has occurred while executing timer job " + timerClass.Name, e);
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_notification.CurrentMessage = timerClass.Name + " Failed.";
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_notification.Status = ProgressNotificationStatus.Failed;
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}
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}
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SaveSettings(settings);
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}
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/// <summary>
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/// Initializes jobs in the database using the IJob instances that are
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/// registered in CentralDispatch
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/// </summary>
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public virtual void Initialize()
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{
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Logger.Debug("Initializing jobs. Count {0}", _jobs.Count());
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var currentTimer = All();
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foreach (var timer in _jobs)
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{
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var timerProviderLocal = timer;
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if (!currentTimer.Exists(c => c.TypeName == timerProviderLocal.GetType().ToString()))
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{
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var settings = new JobSetting
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{
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Enable = timerProviderLocal.DefaultInterval > 0,
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TypeName = timer.GetType().ToString(),
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Name = timerProviderLocal.Name,
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Interval = timerProviderLocal.DefaultInterval,
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LastExecution = DateTime.MinValue
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};
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SaveSettings(settings);
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}
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}
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}
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/// <summary>
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/// Gets the next scheduled run time for the job
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/// (Estimated due to schedule timer)
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/// </summary>
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/// <returns>DateTime of next scheduled job execution</returns>
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public virtual DateTime NextScheduledRun(Type jobType)
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{
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var job = All().Where(t => t.TypeName == jobType.ToString()).FirstOrDefault();
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if (job == null)
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return DateTime.Now;
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return job.LastExecution.AddMinutes(job.Interval);
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}
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}
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} |