New: Schedule refresh and process monitored download tasks at high priority

Closes #4907

src/NzbDrone.Core/Datastore/TableMapping.cs

@@ -60,7 +60,8 @@ public static void Map()
                   .Ignore(r => r.FreeSpace)
                   .Ignore(r => r.TotalSpace);
 
-            Mapper.Entity<ScheduledTask>().RegisterModel("ScheduledTasks");
+            Mapper.Entity<ScheduledTask>().RegisterModel("ScheduledTasks")
+                  .Ignore(i => i.Priority);
 
             Mapper.Entity<IndexerDefinition>().RegisterDefinition("Indexers")
                   .Ignore(i => i.Enable)

src/NzbDrone.Core/Download/TrackedDownloads/DownloadMonitoringService.cs

@@ -54,7 +54,7 @@ public DownloadMonitoringService(IDownloadClientStatusService downloadClientStat
 
         private void QueueRefresh()
         {
-            _manageCommandQueue.Push(new RefreshMonitoredDownloadsCommand());
+            _manageCommandQueue.Push(new RefreshMonitoredDownloadsCommand(), CommandPriority.High);
         }
 
         private void Refresh()
@@ -75,7 +75,7 @@ private void Refresh()
 
                 _trackedDownloadService.UpdateTrackable(trackedDownloads);
                 _eventAggregator.PublishEvent(new TrackedDownloadRefreshedEvent(trackedDownloads));
-                _manageCommandQueue.Push(new ProcessMonitoredDownloadsCommand());
+                _manageCommandQueue.Push(new ProcessMonitoredDownloadsCommand(), CommandPriority.High);
             }
             finally
             {

src/NzbDrone.Core/Jobs/ScheduledTask.cs

@@ -1,5 +1,6 @@
 using System;
 using NzbDrone.Core.Datastore;
+using NzbDrone.Core.Messaging.Commands;
 
 namespace NzbDrone.Core.Jobs
 {
@@ -8,5 +9,11 @@ public class ScheduledTask : ModelBase
         public string TypeName { get; set; }
         public int Interval { get; set; }
         public DateTime LastExecution { get; set; }
+        public CommandPriority Priority { get; set; }
+
+        public ScheduledTask()
+        {
+            Priority = CommandPriority.Low;
+        }
     }
 }

src/NzbDrone.Core/Jobs/Scheduler.cs

@@ -39,7 +39,7 @@ private void ExecuteCommands()
 
                 foreach (var task in tasks)
                 {
-                    _commandQueueManager.Push(task.TypeName, task.LastExecution, CommandPriority.Low, CommandTrigger.Scheduled);
+                    _commandQueueManager.Push(task.TypeName, task.LastExecution, task.Priority, CommandTrigger.Scheduled);
                 }
             }
 

src/NzbDrone.Core/Jobs/TaskManager.cs

@@ -2,6 +2,7 @@
 using System.Collections.Generic;
 using System.Linq;
 using NLog;
+using NzbDrone.Common.Cache;
 using NzbDrone.Core.Backup;
 using NzbDrone.Core.Configuration;
 using NzbDrone.Core.Configuration.Events;
@@ -32,49 +33,86 @@ public class TaskManager : ITaskManager, IHandle<ApplicationStartedEvent>, IHand
         private readonly IScheduledTaskRepository _scheduledTaskRepository;
         private readonly IConfigService _configService;
         private readonly Logger _logger;
+        private readonly ICached<ScheduledTask> _cache;
 
-        public TaskManager(IScheduledTaskRepository scheduledTaskRepository, IConfigService configService, Logger logger)
+        public TaskManager(IScheduledTaskRepository scheduledTaskRepository, IConfigService configService, ICacheManager cacheManager, Logger logger)
         {
             _scheduledTaskRepository = scheduledTaskRepository;
             _configService = configService;
+            _cache = cacheManager.GetCache<ScheduledTask>(GetType());
             _logger = logger;
         }
 
         public IList<ScheduledTask> GetPending()
         {
-            return _scheduledTaskRepository.All()
-                                           .Where(c => c.Interval > 0 && c.LastExecution.AddMinutes(c.Interval) < DateTime.UtcNow)
-                                           .ToList();
+            return _cache.Values
+                         .Where(c => c.Interval > 0 && c.LastExecution.AddMinutes(c.Interval) < DateTime.UtcNow)
+                         .ToList();
         }
 
         public List<ScheduledTask> GetAll()
         {
-            return _scheduledTaskRepository.All().ToList();
+            return _cache.Values.ToList();
         }
 
         public DateTime GetNextExecution(Type type)
         {
-            var scheduledTask = _scheduledTaskRepository.All().Single(v => v.TypeName == type.FullName);
+            var scheduledTask = _cache.Find(type.FullName);
+
             return scheduledTask.LastExecution.AddMinutes(scheduledTask.Interval);
         }
 
         public void Handle(ApplicationStartedEvent message)
         {
-            var defaultTasks = new[]
+            var defaultTasks = new List<ScheduledTask>
                 {
-                    new ScheduledTask{ Interval = 1, TypeName = typeof(RefreshMonitoredDownloadsCommand).FullName},
-                    new ScheduledTask{ Interval = 5, TypeName = typeof(MessagingCleanupCommand).FullName},
-                    new ScheduledTask{ Interval = 6*60, TypeName = typeof(ApplicationUpdateCheckCommand).FullName},
-                    new ScheduledTask{ Interval = 3*60, TypeName = typeof(UpdateSceneMappingCommand).FullName},
-                    new ScheduledTask{ Interval = 6*60, TypeName = typeof(CheckHealthCommand).FullName},
-                    new ScheduledTask{ Interval = 12*60, TypeName = typeof(RefreshSeriesCommand).FullName},
-                    new ScheduledTask{ Interval = 24*60, TypeName = typeof(HousekeepingCommand).FullName},
-                    new ScheduledTask{ Interval = 24*60, TypeName = typeof(CleanUpRecycleBinCommand).FullName},
+                    new ScheduledTask
+                    {
+                        Interval = 1,
+                        TypeName = typeof(RefreshMonitoredDownloadsCommand).FullName,
+                        Priority = CommandPriority.High
+                    },
 
                     new ScheduledTask
                     {
-                        Interval = GetBackupInterval(),
-                        TypeName = typeof(BackupCommand).FullName
+                        Interval = 5,
+                        TypeName = typeof(MessagingCleanupCommand).FullName
+                    },
+
+                    new ScheduledTask
+                    {
+                        Interval = 6 * 60,
+                        TypeName = typeof(ApplicationUpdateCheckCommand).FullName
+                    },
+
+                    new ScheduledTask
+                    {
+                        Interval = 3 * 60,
+                        TypeName = typeof(UpdateSceneMappingCommand).FullName
+                    },
+
+                    new ScheduledTask
+                    {
+                        Interval = 6 * 60,
+                        TypeName = typeof(CheckHealthCommand).FullName
+                    },
+
+                    new ScheduledTask
+                    {
+                        Interval = 12 * 60,
+                        TypeName = typeof(RefreshSeriesCommand).FullName
+                    },
+
+                    new ScheduledTask
+                    {
+                        Interval = 24 * 60,
+                        TypeName = typeof(HousekeepingCommand).FullName
+                    },
+
+                    new ScheduledTask
+                    {
+                        Interval = 24 * 60,
+                        TypeName = typeof(CleanUpRecycleBinCommand).FullName
                     },
 
                     new ScheduledTask
@@ -83,6 +121,12 @@ public void Handle(ApplicationStartedEvent message)
                         TypeName = typeof(ImportListSyncCommand).FullName
                     },
 
+                    new ScheduledTask
+                    {
+                        Interval = GetBackupInterval(),
+                        TypeName = typeof(BackupCommand).FullName
+                    },
+
                     new ScheduledTask
                     { 
                         Interval = GetRssSyncInterval(),
@@ -114,6 +158,7 @@ public void Handle(ApplicationStartedEvent message)
                     currentDefinition.LastExecution = DateTime.UtcNow;
                 }
 
+                _cache.Set(currentDefinition.TypeName, currentDefinition);
                 _scheduledTaskRepository.Upsert(currentDefinition);
             }
         }
@@ -159,7 +204,11 @@ public void Handle(CommandExecutedEvent message)
             if (scheduledTask != null && message.Command.Body.UpdateScheduledTask)
             {
                 _logger.Trace("Updating last run time for: {0}", scheduledTask.TypeName);
-                _scheduledTaskRepository.SetLastExecutionTime(scheduledTask.Id, DateTime.UtcNow);
+
+                var lastExecution = DateTime.UtcNow;
+
+                _scheduledTaskRepository.SetLastExecutionTime(scheduledTask.Id, lastExecution);
+                _cache.Find(scheduledTask.TypeName).LastExecution = lastExecution;
             }
         }
 
@@ -172,6 +221,9 @@ public void HandleAsync(ConfigSavedEvent message)
             backup.Interval = GetBackupInterval();
 
             _scheduledTaskRepository.UpdateMany(new List<ScheduledTask>{ rss, backup });
+
+            _cache.Find(rss.TypeName).Interval = rss.Interval;
+            _cache.Find(backup.TypeName).Interval = backup.Interval;
         }
     }
 }