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Better names, more info, not using events

This commit is contained in:
Mark McDowall 2013-08-28 21:43:26 -07:00
parent bb103947a2
commit 3c632743a1
6 changed files with 107 additions and 74 deletions
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10
NzbDrone.Api/Commands/CommandModule.cs
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@ -4,7 +4,7 @@ using Nancy;
using NzbDrone.Api.Extensions;
using NzbDrone.Common.Composition;
using NzbDrone.Common.Messaging;
using NzbDrone.Common.Messaging.Manager;
using NzbDrone.Common.Messaging.Tracking;
namespace NzbDrone.Api.Commands
{
@ -12,13 +12,13 @@ namespace NzbDrone.Api.Commands
{
private readonly IMessageAggregator _messageAggregator;
private readonly IContainer _container;
private readonly IManageCommands _commandManager;
private readonly ITrackCommands _trackCommands;
public CommandModule(IMessageAggregator messageAggregator, IContainer container, IManageCommands commandManager)
public CommandModule(IMessageAggregator messageAggregator, IContainer container, ITrackCommands trackCommands)
{
_messageAggregator = messageAggregator;
_container = container;
_commandManager = commandManager;
_trackCommands = trackCommands;
Post["/"] = x => RunCommand(ReadResourceFromRequest());
Get["/"] = x => GetAllCommands();
@ -39,7 +39,7 @@ namespace NzbDrone.Api.Commands
private Response GetAllCommands()
{
return _commandManager.Items.AsResponse();
return _trackCommands.AllTracked.AsResponse();
}
}
}

59
NzbDrone.Common/Messaging/Manager/CommandManager.cs
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@ -1,59 +0,0 @@
using System;
using System.Collections.Generic;
using System.Linq;
using NzbDrone.Common.Cache;
using NzbDrone.Common.Messaging.Events;
namespace NzbDrone.Common.Messaging.Manager
{
public interface IManageCommands
{
ICollection<CommandManagerItem> Items { get; }
Boolean ExistingItem(ICommand command);
}
public class CommandManager : IManageCommands,
IHandle<CommandStartedEvent>,
IHandle<CommandCompletedEvent>,
IHandle<CommandFailedEvent>
{
private readonly ICached<CommandManagerItem> _cache;
public CommandManager(ICacheManger cacheManger)
{
_cache = cacheManger.GetCache<CommandManagerItem>(GetType());
}
public void Handle(CommandStartedEvent message)
{
_cache.Set(message.Command.CommandId, new CommandManagerItem(message.Command, CommandState.Running));
}
public void Handle(CommandCompletedEvent message)
{
_cache.Set(message.Command.CommandId, new CommandManagerItem(message.Command, CommandState.Completed));
}
public void Handle(CommandFailedEvent message)
{
_cache.Set(message.Command.CommandId, new CommandManagerItem(message.Command, CommandState.Failed));
}
public ICollection<CommandManagerItem> Items
{
get
{
return _cache.Values;
}
}
public bool ExistingItem(ICommand command)
{
var running = Items.Where(i => i.Type == command.GetType().FullName && i.State == CommandState.Running);
var result = running.Select(r => r.Command).Contains(command, new CommandEqualityComparer());
return result;
}
}
}

20
NzbDrone.Common/Messaging/MessageAggregator.cs
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@ -5,7 +5,7 @@ using System.Threading.Tasks;
using NLog;
using NzbDrone.Common.EnsureThat;
using NzbDrone.Common.Messaging.Events;
using NzbDrone.Common.Messaging.Manager;
using NzbDrone.Common.Messaging.Tracking;
using NzbDrone.Common.Serializer;
using NzbDrone.Common.TPL;
@ -15,14 +15,14 @@ namespace NzbDrone.Common.Messaging
{
private readonly Logger _logger;
private readonly IServiceFactory _serviceFactory;
private readonly IManageCommands _commandManager;
private readonly ITrackCommands _trackCommands;
private readonly TaskFactory _taskFactory;
public MessageAggregator(Logger logger, IServiceFactory serviceFactory, IManageCommands commandManager)
public MessageAggregator(Logger logger, IServiceFactory serviceFactory, ITrackCommands trackCommands)
{
_logger = logger;
_serviceFactory = serviceFactory;
_commandManager = commandManager;
_trackCommands = trackCommands;
var scheduler = new LimitedConcurrencyLevelTaskScheduler(2);
_taskFactory = new TaskFactory(scheduler);
}
@ -87,10 +87,13 @@ namespace NzbDrone.Common.Messaging
_logger.Debug("{0} -> {1}", command.GetType().Name, handler.GetType().Name);
var sw = Stopwatch.StartNew();
TrackedCommand queuedCommand = null;
try
{
if (_commandManager.ExistingItem(command))
queuedCommand = _trackCommands.TrackIfNew(command);
if (queuedCommand == null)
{
_logger.Info("Command is already in progress: {0}", command.GetType().Name);
return;
@ -99,10 +102,17 @@ namespace NzbDrone.Common.Messaging
PublishEvent(new CommandStartedEvent(command));
handler.Execute(command);
sw.Stop();
_trackCommands.Completed(queuedCommand, sw.Elapsed);
PublishEvent(new CommandCompletedEvent(command));
}
catch (Exception e)
{
if (queuedCommand != null)
{
_trackCommands.Failed(queuedCommand, e);
}
PublishEvent(new CommandFailedEvent(command, e));
throw;
}

78
NzbDrone.Common/Messaging/Tracking/CommandTrackingService.cs Normal file
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@ -0,0 +1,78 @@
using System;
using System.Collections.Generic;
using System.Linq;
using NzbDrone.Common.Cache;
namespace NzbDrone.Common.Messaging.Tracking
{
public interface ITrackCommands
{
TrackedCommand TrackIfNew(ICommand command);
TrackedCommand Completed(TrackedCommand trackedCommand, TimeSpan runtime);
TrackedCommand Failed(TrackedCommand trackedCommand, Exception e);
ICollection<TrackedCommand> AllTracked { get; }
Boolean ExistingCommand(ICommand command);
}
public class TrackCommands : ITrackCommands
{
private readonly ICached<TrackedCommand> _cache;
public TrackCommands(ICacheManger cacheManger)
{
_cache = cacheManger.GetCache<TrackedCommand>(GetType());
}
public TrackedCommand TrackIfNew(ICommand command)
{
if (ExistingCommand(command))
{
return null;
}
var trackedCommand = new TrackedCommand(command, CommandState.Running);
_cache.Set(command.CommandId, trackedCommand);
return trackedCommand;
}
public TrackedCommand Completed(TrackedCommand trackedCommand, TimeSpan runtime)
{
trackedCommand.StateChangeTime = DateTime.UtcNow;
trackedCommand.State = CommandState.Completed;
trackedCommand.Runtime = runtime;
_cache.Set(trackedCommand.Command.CommandId, trackedCommand);
return trackedCommand;
}
public TrackedCommand Failed(TrackedCommand trackedCommand, Exception e)
{
trackedCommand.StateChangeTime = DateTime.UtcNow;
trackedCommand.State = CommandState.Failed;
trackedCommand.Exception = e;
_cache.Set(trackedCommand.Command.CommandId, trackedCommand);
return trackedCommand;
}
public ICollection<TrackedCommand> AllTracked
{
get
{
return _cache.Values;
}
}
public bool ExistingCommand(ICommand command)
{
var running = AllTracked.Where(i => i.Type == command.GetType().FullName && i.State == CommandState.Running);
var result = running.Select(r => r.Command).Contains(command, new CommandEqualityComparer());
return result;
}
}
}

10
NzbDrone.Common/Messaging/Manager/CommandManagerItem.cs → NzbDrone.Common/Messaging/Tracking/TrackedCommand.cs
View File

@ -1,18 +1,22 @@
using System;
namespace NzbDrone.Common.Messaging.Manager
namespace NzbDrone.Common.Messaging.Tracking
{
public class CommandManagerItem
public class TrackedCommand
{
public String Type { get; private set; }
public ICommand Command { get; private set; }
public CommandState State { get; set; }
public DateTime StateChangeTime { get; set; }
public TimeSpan Runtime { get; set; }
public Exception Exception { get; set; }
public CommandManagerItem(ICommand command, CommandState state)
public TrackedCommand(ICommand command, CommandState state)
{
Type = command.GetType().FullName;
Command = command;
State = state;
StateChangeTime = DateTime.UtcNow;
}
}

4
NzbDrone.Common/NzbDrone.Common.csproj
View File

@ -92,8 +92,8 @@
<Compile Include="IEnumerableExtensions.cs" />
<Compile Include="Instrumentation\GlobalExceptionHandlers.cs" />
<Compile Include="Instrumentation\ExceptronTarget.cs" />
<Compile Include="Messaging\Manager\CommandManager.cs" />
<Compile Include="Messaging\Manager\CommandManagerItem.cs" />
<Compile Include="Messaging\Tracking\CommandTrackingService.cs" />
<Compile Include="Messaging\Tracking\TrackedCommand.cs" />
<Compile Include="Messaging\Events\CommandStartedEvent.cs" />
<Compile Include="Messaging\CommandEqualityComparer.cs" />
<Compile Include="PathEqualityComparer.cs" />