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Remoting Compression Channel Sink

, 12 Nov 2008 CPOL
An article explaining a Remoting extensible channel sink architecture and an implementation of the compression channel sink.
using System;
using System.Collections;
using System.Runtime.Remoting.Channels;

namespace Util
    public class CompressionServerChannelSinkProvider : IServerChannelSinkProvider
        // The next sink provider in the sink provider chain.
        private IServerChannelSinkProvider _next = null;
        // The compression threshold.
        private readonly int _compressionThreshold;

        public CompressionServerChannelSinkProvider(IDictionary properties, ICollection providerData)
            // read in web.config parameters
            foreach (DictionaryEntry entry in properties)
                switch ((String) entry.Key)
                    case "compressionThreshold":
                        _compressionThreshold = Convert.ToInt32((String) entry.Value);
                        throw new ArgumentException("Invalid configuration entry: " + (String) entry.Key);

        #region IServerChannelSinkProvider Members

        public IServerChannelSink CreateSink(IChannelReceiver channel)
            IServerChannelSink nextSink = null;
            if (_next != null)
                // Call CreateSink on the next sink provider in the chain.  This will return
                // to us the actual next sink object.  If the next sink is null, uh oh!
                if ((nextSink = _next.CreateSink(channel)) == null) return null;

            // Create this sink, passing to it the previous sink in the chain so that it knows
            // to whom messages should be passed.
            return new CompressionServerChannelSink(nextSink, _compressionThreshold);

        public void GetChannelData(IChannelDataStore channelData)
            // Do nothing.  No channel specific data.

        /// <summary>
        /// Gets or sets the next sink provider in the channel sink provider chain.
        /// </summary>
        public IServerChannelSinkProvider Next
			get { return _next; }
			set { _next = value; }


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About the Author

United States United States
Alexander Schmidt. I'm a software developer, who is working primarily with Microsoft technologies including Microsoft .NET. I'm also interested in optimization problems and software engineering in general. You can visit my blog at

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