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Disconnected Client Architecture

, 14 Feb 2007
A look at an offline client architecture that I've implemented in an application for a client.
/*
Copyright (c) 2007, Marc Clifton
All rights reserved.

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are permitted provided that the following conditions are met:

* Redistributions of source code must retain the above copyright notice, this list
  of conditions and the following disclaimer. 

* Redistributions in binary form must reproduce the above copyright notice, this 
  list of conditions and the following disclaimer in the documentation and/or other
  materials provided with the distribution. 
 
* Neither the name of Marc Clifton nor the names of its contributors may be
  used to endorse or promote products derived from this software without specific
  prior written permission. 

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

*/

using System;

using DCA.CommandPackets;

namespace DCA.ClientAPI
{
	/// <summary>
	/// Used by the comm reader thread to indicate a client-side deserialization error or other error.
	/// </summary>
	public class ConnectionErrorResponse : IResponse
	{
		protected string errMsg;
		protected string stackTrace;

		/// <summary>
		/// Returns stackTrace
		/// </summary>
		public string StackTrace
		{
			get { return stackTrace; }
		}

		public string ErrorMessage
		{
			get { return errMsg; }
		}

		public ConnectionErrorResponse(string errMsg, string stackTrace)
		{
			this.errMsg = errMsg;
			this.stackTrace = stackTrace;
		}

		public int ResponseId
		{
			get { return (int)Response.ClientError; }
		}

		public void Serialize(ICommunications comm)
		{
			throw new Exception("The method or operation is not implemented.");
		}

		public void Deserialize(ICommunications comm)
		{
			throw new Exception("The method or operation is not implemented.");
		}

		public void CopyFrom(IResponse src)
		{
			errMsg = ((ClientErrorResponse)src).ErrorMessage;
			stackTrace = ((ClientErrorResponse)src).StackTrace;
		}
	}
}

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This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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About the Author

Marc Clifton

United States United States
Marc is the creator of two open source projets, MyXaml, a declarative (XML) instantiation engine and the Advanced Unit Testing framework, and Interacx, a commercial n-tier RAD application suite.  Visit his website, www.marcclifton.com, where you will find many of his articles and his blog.
 
Marc lives in Philmont, NY.

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