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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 CompressionClientChannelSinkProvider : IClientChannelSinkProvider
        // The next sink provider in the sink provider chain.
        private IClientChannelSinkProvider _next = null;
        // The compression threshold.
        private readonly int _compressionThreshold;

        public CompressionClientChannelSinkProvider()

        public CompressionClientChannelSinkProvider(IDictionary properties, ICollection contextData)
            // 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 IClientChannelSinkProvider Members

        public IClientChannelSink CreateSink(IChannelSender channel, string url, object remoteChannelData)
            IClientChannelSink 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, url, remoteChannelData)) == 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 CompressionClientChannelSink(nextSink, _compressionThreshold);

        /// <summary>
        /// Gets or sets the next sink provider in the channel sink provider chain.
        /// </summary>
        public IClientChannelSinkProvider 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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