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

Fixes #1542
Fixes #1553
Fixes #1537

src/NzbDrone.Core/Datastore/TableMapping.cs

@@ -60,7 +60,8 @@ namespace NzbDrone.Core.Datastore
                   .Ignore(r => r.FreeSpace)
                   .Ignore(r => r.TotalSpace);
 
-            Mapper.Entity<ScheduledTask>("ScheduledTasks").RegisterModel();
+            Mapper.Entity<ScheduledTask>("ScheduledTasks").RegisterModel()
+                  .Ignore(i => i.Priority);
 
             Mapper.Entity<IndexerDefinition>("Indexers").RegisterModel()
                   .Ignore(x => x.ImplementationName)

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

@@ -54,7 +54,7 @@ namespace NzbDrone.Core.Download.TrackedDownloads
 
         private void QueueRefresh()
         {
-            _manageCommandQueue.Push(new RefreshMonitoredDownloadsCommand());
+            _manageCommandQueue.Push(new RefreshMonitoredDownloadsCommand(), CommandPriority.High);
         }
 
         private void Refresh()
@@ -75,7 +75,7 @@ namespace NzbDrone.Core.Download.TrackedDownloads
 
                 _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
 {
@@ -8,6 +9,12 @@ namespace NzbDrone.Core.Jobs
         public string TypeName { get; set; }
         public int Interval { get; set; }
         public DateTime LastExecution { get; set; }
+        public CommandPriority Priority { get; set; }
         public DateTime LastStartTime { get; set; }
+
+        public ScheduledTask()
+        {
+            Priority = CommandPriority.Low;
+        }
     }
 }

src/NzbDrone.Core/Jobs/Scheduler.cs

@@ -1,4 +1,4 @@
-using System.Linq;
+using System.Linq;
 using System.Threading;
 using System.Threading.Tasks;
 using NLog;
@@ -39,7 +39,7 @@ namespace NzbDrone.Core.Jobs
 
                 foreach (var task in tasks)
                 {
-                    _commandQueueManager.Push(task.TypeName, task.LastExecution, task.LastStartTime, CommandPriority.Low, CommandTrigger.Scheduled);
+                    _commandQueueManager.Push(task.TypeName, task.LastExecution, task.LastStartTime, task.Priority, CommandTrigger.Scheduled);
                 }
             }
             finally

src/NzbDrone.Core/Jobs/TaskManager.cs

@@ -2,6 +2,7 @@ using System;
 using System.Collections.Generic;
 using System.Linq;
 using NLog;
+using NzbDrone.Common.Cache;
 using NzbDrone.Core.Backup;
 using NzbDrone.Core.Books.Commands;
 using NzbDrone.Core.Configuration;
@@ -31,43 +32,81 @@ namespace NzbDrone.Core.Jobs
         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()
+            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,
+                        Priority = CommandPriority.High
+                    },
+
+                    new ScheduledTask
+                    {
+                        Interval = 5,
+                        TypeName = typeof(MessagingCleanupCommand).FullName
+                    },
+
+                    new ScheduledTask
+                    {
+                        Interval = 6 * 60,
+                        TypeName = typeof(ApplicationUpdateCheckCommand).FullName
+                    },
+
+                    new ScheduledTask
+                    {
+                        Interval = 6 * 60,
+                        TypeName = typeof(CheckHealthCommand).FullName
+                    },
+
+                    new ScheduledTask
+                    {
+                        Interval = 24 * 60,
+                        TypeName = typeof(RefreshAuthorCommand).FullName
+                    },
+
+                    new 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 = 6 * 60, TypeName = typeof(CheckHealthCommand).FullName },
-                    new ScheduledTask { Interval = 24 * 60, TypeName = typeof(RefreshAuthorCommand).FullName },
-                    new ScheduledTask { Interval = 24 * 60, TypeName = typeof(RescanFoldersCommand).FullName },
-                    new ScheduledTask { Interval = 24 * 60, TypeName = typeof(HousekeepingCommand).FullName },
+                        Interval = 24 * 60,
+                        TypeName = typeof(RescanFoldersCommand).FullName
+                    },
+
+                    new ScheduledTask
+                    {
+                        Interval = 24 * 60,
+                        TypeName = typeof(HousekeepingCommand).FullName
+                    },
 
                     new ScheduledTask
                     {
@@ -90,7 +129,7 @@ namespace NzbDrone.Core.Jobs
 
             var currentTasks = _scheduledTaskRepository.All().ToList();
 
-            _logger.Trace("Initializing jobs. Available: {0} Existing: {1}", defaultTasks.Count(), currentTasks.Count());
+            _logger.Trace("Initializing jobs. Available: {0} Existing: {1}", defaultTasks.Count, currentTasks.Count);
 
             foreach (var job in currentTasks)
             {
@@ -112,6 +151,9 @@ namespace NzbDrone.Core.Jobs
                     currentDefinition.LastExecution = DateTime.UtcNow;
                 }
 
+                currentDefinition.Priority = defaultTask.Priority;
+
+                _cache.Set(currentDefinition.TypeName, currentDefinition);
                 _scheduledTaskRepository.Upsert(currentDefinition);
             }
         }
@@ -152,7 +194,16 @@ namespace NzbDrone.Core.Jobs
             if (scheduledTask != null && message.Command.Body.UpdateScheduledTask)
             {
                 _logger.Trace("Updating last run time for: {0}", scheduledTask.TypeName);
-                _scheduledTaskRepository.SetLastExecutionTime(scheduledTask.Id, DateTime.UtcNow, message.Command.StartedAt.Value);
+
+                var lastExecution = DateTime.UtcNow;
+                var startTime = message.Command.StartedAt.Value;
+
+                _scheduledTaskRepository.SetLastExecutionTime(scheduledTask.Id, lastExecution, startTime);
+
+                var cached = _cache.Find(scheduledTask.TypeName);
+
+                cached.LastExecution = lastExecution;
+                cached.LastStartTime = startTime;
             }
         }
 
@@ -165,6 +216,9 @@ namespace NzbDrone.Core.Jobs
             backup.Interval = GetBackupInterval();
 
             _scheduledTaskRepository.UpdateMany(new List<ScheduledTask> { rss, backup });
+
+            _cache.Find(rss.TypeName).Interval = rss.Interval;
+            _cache.Find(backup.TypeName).Interval = backup.Interval;
         }
     }
 }

src/NzbDrone.Core/Messaging/Commands/CommandPriorityComparer.cs

@@ -0,0 +1,32 @@
+using System.Collections.Generic;
+
+namespace NzbDrone.Core.Messaging.Commands
+{
+    public class CommandPriorityComparer : IComparer<CommandStatus>
+    {
+        public int Compare(CommandStatus x, CommandStatus y)
+        {
+            if (x == CommandStatus.Started && y != CommandStatus.Started)
+            {
+                return -1;
+            }
+
+            if (x != CommandStatus.Started && y == CommandStatus.Started)
+            {
+                return 1;
+            }
+
+            if (x < y)
+            {
+                return -1;
+            }
+
+            if (x > y)
+            {
+                return 1;
+            }
+
+            return 0;
+        }
+    }
+}

src/Readarr.Api.V1/Commands/CommandController.cs

@@ -27,6 +27,8 @@ namespace Readarr.Api.V1.Commands
         private readonly Debouncer _debouncer;
         private readonly Dictionary<int, CommandResource> _pendingUpdates;
 
+        private readonly CommandPriorityComparer _commandPriorityComparer = new CommandPriorityComparer();
+
         public CommandController(IManageCommandQueue commandQueueManager,
                              IBroadcastSignalRMessage signalRBroadcaster,
                              KnownTypes knownTypes)
@@ -35,10 +37,10 @@ namespace Readarr.Api.V1.Commands
             _commandQueueManager = commandQueueManager;
             _knownTypes = knownTypes;
 
-            PostValidator.RuleFor(c => c.Name).NotBlank();
-
             _debouncer = new Debouncer(SendUpdates, TimeSpan.FromSeconds(0.1));
             _pendingUpdates = new Dictionary<int, CommandResource>();
+
+            PostValidator.RuleFor(c => c.Name).NotBlank();
         }
 
         protected override CommandResource GetResourceById(int id)
@@ -72,7 +74,10 @@ namespace Readarr.Api.V1.Commands
         [HttpGet]
         public List<CommandResource> GetStartedCommands()
         {
-            return _commandQueueManager.All().ToResource();
+            return _commandQueueManager.All()
+                .OrderBy(c => c.Status, _commandPriorityComparer)
+                .ThenByDescending(c => c.Priority)
+                .ToResource();
         }
 
         [RestDeleteById]