Event Manager Code - EventSubscriberAttribute.cs

The EventSubscriberAttribute is used to decorate a C# function that is the recipient of a subscribed event from our event manager. The topic name can be a wildcard string, just like Tibco. For instance, to subscribe to all actions that happen to a trade, you can subscribe to topic "TradingSystem.Trade.*".

Notice that the attribute is declared with AllowMultiple=true. This lets a function have multiple subscription declarations.

The final thing to notice is the IsBackground flag. If a subscriber is declared with IsBackground=true, then the event will be dispatched to the subscriber on a worker thread (internally, Begin/EndInvoke is used).

Here is the code:

using System;

// --------------------------------------------------------------------
//
// This code is (C) Copyright 2005 Marc Adler
//
// --------------------------------------------------------------------

namespace Magmasystems.EventManager
{
 /// 

 /// EventSubscriberAttribute
 /// 
 [AttributeUsage(AttributeTargets.Method, AllowMultiple=true)]
 public class EventSubscriberAttribute : System.Attribute
 {
  private string _topicName;
  private bool   _isBackground;
    
  public EventSubscriberAttribute()
  {
  }

  /// 

  /// EventSubscriberAttribute
  /// 
  /// The name of the event
  public EventSubscriberAttribute(string topicName)
  {
   this._topicName    = topicName;
   this._isBackground = false;
  }
    
  public string Topic
  {
   get
   {
    return this._topicName;
   }
   set
   {
    this._topicName = value;
   }
  }

  public bool IsBackground
  {
   get
   {
    return this._isBackground;
   }
   set
   {
    this._isBackground = value;
   }
  }
 }
}

©2006 Marc Adler - All Rights Reserved