ListenerBase.cs
86 lines
| 2.7 KiB
| text/x-csharp
|
CSharpLexer
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r134 | using System; | ||
| using System.Collections.Generic; | ||||
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r152 | using Implab.Components; | ||
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r134 | |||
| namespace Implab.Diagnostics { | ||||
| public abstract class ListenerBase : ServiceLocator, ILogWriter<object>, ILogWriter<TraceEvent> { | ||||
| readonly Dictionary<object, Action> m_subscriptions = new Dictionary<object, Action>(); | ||||
| protected ListenerBase() { | ||||
| Register(this); | ||||
| } | ||||
| public void Subscribe(Type eventType) { | ||||
| if (eventType == null) | ||||
| throw new ArgumentNullException("eventType"); | ||||
| GetType().GetMethod("Subscribe", new Type[0]).MakeGenericMethod(eventType).Invoke(this, null); | ||||
| } | ||||
| public void Subscribe<TEvent>() { | ||||
| Subscribe<TEvent>(LogChannel<TEvent>.Default); | ||||
| } | ||||
| public void Subscribe<TEvent>(LogChannel<TEvent> channel) { | ||||
| if (channel == null) | ||||
| throw new ArgumentNullException("channel"); | ||||
| lock (m_subscriptions) { | ||||
| AssertNotDisposed(); | ||||
| if (m_subscriptions.ContainsKey(channel)) | ||||
| return; | ||||
| var writer = GetService<ILogWriter<TEvent>>(); | ||||
| EventHandler<LogEventArgs<TEvent>> handler = (sender, args) => writer.Write(args,args.Value); | ||||
| channel.Events += handler; | ||||
| Action unsubscribe = () => { | ||||
| channel.Events -= handler; | ||||
| }; | ||||
| m_subscriptions.Add(channel, unsubscribe); | ||||
| } | ||||
| } | ||||
| public void Unsubscribe<TEvent>(LogChannel<TEvent> channel) { | ||||
| if (channel == null) | ||||
| throw new ArgumentNullException("channel"); | ||||
| lock (m_subscriptions) { | ||||
| Action subscription; | ||||
| if (m_subscriptions.TryGetValue(channel, out subscription)) { | ||||
| subscription(); | ||||
| m_subscriptions.Remove(channel); | ||||
| } | ||||
| } | ||||
| } | ||||
| public void UnsubscribeAll() { | ||||
| lock (m_subscriptions) { | ||||
| foreach (var subscription in m_subscriptions.Values) | ||||
| subscription(); | ||||
| m_subscriptions.Clear(); | ||||
| } | ||||
| } | ||||
| #region ILogWriter implementation | ||||
| public abstract void Write(LogEventArgs args, object entry); | ||||
| #endregion | ||||
| #region ILogWriter implementation | ||||
| public virtual void Write(LogEventArgs args, TraceEvent entry) { | ||||
| Write(args, (object)entry); | ||||
| } | ||||
| #endregion | ||||
| protected override void Dispose(bool disposing) { | ||||
| base.Dispose(disposing); | ||||
| if (disposing) { | ||||
| UnsubscribeAll(); | ||||
| } | ||||
| } | ||||
| } | ||||
| } | ||||