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POUsing System.Reactive deserialize messages
 

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    <p>I currently have a program that listens to a network stream and fires events when a new message has been deserialized. </p> <pre><code>while(true) { byte[] lengthBytes = new byte[10]; networkStream.Read(lengthBytes, 0, 10); int messageLength = Int32.Parse(Encoding.UTF8.GetString(lengthBytes)); var messageBytes = new byte[messageLength + 10]; Array.Copy(lengthBytes, messageBytes, 10); int bytesReadTotal = 10; while (bytesReadTotal &lt; 10 + messageLength) bytesReadTotal += networkStream.Read(messageBytes, bytesReadTotal, messageLength - bytesReadTotal + 10); OnNewMessage(new MessageEventArgs(messageFactory.GetMessage(messageBytes))); } </code></pre> <p>I want to rewrite this using the reactive extensions so that instead of the event there is an <code>IObservable&lt;Message&gt;</code>. This could be done using</p> <pre><code>Observable.FromEvent&lt;EventHandler&lt;MessageEventArgs&gt;, MessageEventArgs&gt;( (h) =&gt; NewMessage += h, (h) =&gt; NewMessage -= h) .Select( (e) =&gt; { return e.Message; }); </code></pre> <p>However I would prefer to rewrite the listening process using System.Reactive instead. My starting point (from <a href="http://channel9.msdn.com/Blogs/codefest/DC2010T0100-Keynote-Rx-curing-your-asynchronous-programming-blues" rel="nofollow">here</a>) is</p> <pre><code>Func&lt;byte[], int, int, IObservable&lt;int&gt;&gt; read; read = Observable.FromAsyncPattern&lt;byte[], int, int, int&gt;( networkStream.BeginRead, networkStream.EndRead); </code></pre> <p>which allows</p> <pre><code>byte[] lengthBytes = new byte[10]; read(lengthBytes, 0, lengthBytes.Length).Subscribe( { (bytesRead) =&gt; ; }); </code></pre> <p>I'm struggling to see how to continue though. Does anyone have an implementation?</p>
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