[xSocket-develop] General technical question (request for idea)

[Thomas S. <ts...@ib...>]

Hello,

I'm in the process of writing a socket server which basically receives 
data according to a self-defined protocol from mobile devices. The data 
is a mix of line-oriented character data (terminated with a '\n') and 
some kind of payload, which is a ZLib compressed byte stream.

E.g., the client sends the following data in the following sequence to 
the server.

Identifier\n
Checksum value\n
Length of compressed payload\n
ZLib compressed payload byte stream

In a first step, I have written a multi-threaded socket server, which 
uses common IO classes like DataInputStream. Performance is ok on a 
local area network, but due to the blocking issue of any read method of 
a DataInputStream, performance is pretty bad, especially in a 
low-bandwith network.

So I came across NIO and xSocket as one framework using Java NIO.

How can I implement a socket server with xSocket which:

* Implements the protocol as shown above (mix of line-oriented 
characters and a ZLib compressed byte stream)
* Is non-blocking, so at least a few number of simultaneous clients are 
handled gracefully
* Of course, each client needs to be isolated from each other



Any hints, code snippets, ... are much appreciated.


Thank you very much.

Regards,
Thomas