On 6/22/06, peter royal <[EMAIL PROTECTED]> wrote:
On Jun 22, 2006, at 10:36 AM, Henrik Østerlund Gram wrote: > So I end up with wanting to use an IoFilter to parse the 1st layer > messages, then have an IoHandler process it (optionally sending > keepalive messages and do other stuff for layer1), then I want it > to go to another IoFilter that parses the 2nd layer message and > then finally end up in the IoHandler for the 2nd layer protocol. > In a way, similar in setup if you had to implement TCP + an > application protocol. How can this be done with MINA? Simply > putting the 1st layer protocol handler in a filter also? That > doesn't seem to be what's intented - having looked at the MINA > presentation slides - but will it at least work? I would suggest implementing each layer as an IoFilter. Just because an IoFilter receives a message, it does not mean that it must pass the message on. Thus, your layer 1 IoFilter can send our responses for keep-alive without disturbing layer 2 and beyond.
You can also use the chain of responsibility pattern in your IoHandler implementation. Actually we implemented the framework for you: http://directory.apache.org/subprojects/mina/apidocs/org/apache/mina/handler/chain/package-summary.html HTH, Trustin -- what we call human nature is actually human habit -- http://gleamynode.net/ -- PGP key fingerprints: * E167 E6AF E73A CBCE EE41 4A29 544D DE48 FE95 4E7E * B693 628E 6047 4F8F CFA4 455E 1C62 A7DC 0255 ECA6
