On 1/23/12 5:48 PM, Robert Tomczyk wrote:
And its happens when im using Unordered or Ordered ThreadPool
Ok, let me try to explain what MINA does under the hood :
- MINA is just a NIO framework. It does no magic, it just receives
byte[] and send byte[];
- however, we have added some convenient filters to allow users to
transform a data structure to byte[] (encode) and from byte[] to data
structure (decode);
- this transformation (encoding/decoding) is not MINA's business, you
have to implement the code that does the transformation;
- as the incoming byte[] can be fragmented (ie, there is no guarantee
whatsoever that the bytes won't be send one byte by one byte to the
remote peer), you have to deal with this fragmentation. This is only a
problem on the decoder size (we don't fragment anything when we send
data : we consider a message as a whole), and the only way to deal with
this fragmentation is to accumulate the incomig bytes before doing the
decoding of a complete message (or you have designed a decoder that can
accept a non-complete PDU, and capable of building incomplete message
until it received everything needed to complete it);
- once a message has been fully decoded (ie we have received enough
bytes to decode a full message), then MINA generates a messageReceived()
event, which has to be processed in the Handler.
This is all what MINA does, and everything else around is just provided
to ease some corner cases. You most certainly don't need any of them
(I'm talking here about executor, demuxHandlers, and such things).
The only reasons why your code does not work are :
- there is a bug in MINA (*very* unlikely, but still possible, and if
so, we would be extremely grateful to have the code that would help us
reproduce the bug, in order to fix MINA)
- there is a bug in your codec or in your handler.
If we focus on the second option, then I would suggest you check
carefully what you are doing in the codec. Using Wireshark could help to
see what exactly is being transmitted on the wire. if the data are not
what you are expecting to receive on the server (or the client), then
that means you are not sending them correctly. Check the encoder and see
if it does its job correctly. If you see the correct byte[] being sent,
then check the decoder : you probably incorrectly decode the bytes and
don't generate correctly the data structure you are expecting.
I hope I have explained clearly what MINA does and where to check for a
potential error. Tell me if you need more direction.
Thanks !
--
Regards,
Cordialement,
Emmanuel Lécharny
www.iktek.com
