[infinispan-dev] Hot Rod - pt3

Hi all, Re: http://community.jboss.org/wiki/HotRodProtocol First, I've made the corresponding changes based on the feedback I got from pt2. This included reducing the response header since clients are already aware of what they sent, addition of topology view id to to non dumb requests and further specification in responses when topology changes have happened...etc. I've also added flags to the request header that allow sending Infinispan flags like: skip cache store, zero lock acquisition timeout...etc. Note that I've noted this as being N * 1 byte where each byte represents a flag. However, I think this could maybe be sent more efficiently by using XOR, i.e. 0x00 -> no flag 0x01 (0000 0001) -> zero lock acquisition 0x02 (0000 0010) -> cache mode local 0x03 (0000 0011) -> zero lock acquisition + cache mode local 0x04 (0000 0100) -> skip locking ...etc. With 2 bytes, we could implement 16 Flags, we currently 11. However, we could use vint as well, making sure that the most significant bit does not mean anything flag wise. Iow, with vint, in 1 byte we'd be able to define 7 diff flags. Thoughts? I've also added the quit command that disconnects clients. Finally, as far as I'm concerned, the specification is complete. I'm leaving the quiet commands out of this initial scope (see http://code.google.com/p/memcached/wiki/MemcacheBinaryProtocol). Remember that quiet commands could be used so that the server buffers responses and only when you send a non-quiet command, the server replies with all the pending answers. As you can see at the bottom of the wiki, I've added a local only put request/response example so that readers get an idea of what a full command looks like. I had received some feedback from readers saying that it was difficult to understand how it all fit together. I'll probably add a couple more examples for non-so-dumb and clever request/responses but I'll held them until we have a final round of feedback and people can indicate whether they want any other examples appearing in the wiki. Cheers, -- Galder Zamarreño Sr. Software Engineer Infinispan, JBoss Cache