[jboss-dev-forums] [Design of JBossCache] - Re: Evolution of TcpDelegatingCacheLoaders/TcpCacheServers

[akluge]

Hi,

   Sorry for taking a bit of time to get back on this, but I have been busy.

    I would expect any given server to respond to both the Memcache and the Jboss Cache protocol. However, I would expect any given client to use only one of them.

   I was not planning on a handshake, but to simply have the client connect, and send requests according to its chosen protocol. Even in this case you will want to have the magic bytes. 

-	They allow the server and the client to do a consistency check. If they see something else at the beginning of a message, they know quickly that something is wrong.

-	They make it easier to handle additional message types (I expect to add event notifications over the JBC protocol).

-	The Memcache binary protocol (http://code.google.com/p/memcached/wiki/MemcacheBinaryProtocol) already uses them, so at least for Memcache requests/responses they are required.

-	The Memcache protocol spec also makes the point that it makes it easier for protocol analyzers to work with the magic bytes.

                                                                               Thanks,
                                                                                       Alex


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