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    <p>This is a pretty broad question and its treatment likely requires a fairly dense book. </p> <p>I don't know of any such resource myself, but lets think this through and consider what would be the dimensions of a network communication pattern space:</p> <p>connection modality: { connection-based, connection-less}</p> <p>interaction modality: { synchronous, asynchronous }</p> <p>conversation complexity: { command-response, dialog}</p> <p>message form: { freeform-stream, semi-structured block, fully-structured block } ..?</p> <p>A good place to start is to take the TCP/IP family of protocols, map them to the above space, and take a look at the implementation(s) of one or more specimens that occupy a unique position in the above protocol-characteristics pattern space. Source code of your favorite *nix os would be a good place to look.</p> <p>Parser implementations would probably fall into two broad categories: {command-switched processing, finite-state-machine}. </p> <p>The former is (obviously) the simpler of the two and likely the initial implementation (unless you've done this sort of thing before). </p> <p>The latter is (likely) more robust, efficient (in terms of loc), and would allow for adopting changes to a protocol (if it is still subject to design change).</p> <p>(The underlying (virtual) OS networking facilities (of course) also greatly influence the implementation. Take JVM, for example: NIO selection based channel processing would work quite nicely with a FSM.) </p> <p>Hope that helps.</p>
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