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From Jørgen Nordmoen <nordmoe...@gmail.com>
Subject Support for DiffServ
Date Fri, 10 Feb 2012 10:37:32 GMT

Long explenation: We are a group of students tasked with creating a
system which is able to prioritize messages in a network, our customer
has asked us to use WSO2 ESB which is, as you might know, just Apache
Synapse. We have one strict demand from the customer and that is that
our system must be able to set the DiffServ field in the IP header. The
system must be able to accept SOAP messages and forward them to a
GlassFish server with the final endpoints. And here is our problem,
since Synapse does not directly support DiffServ or TOS we need to
implement it, but after much research we are still not quite sure how
to do this and that is why this emails is sent. We have some leads on
where we could alter,
org/apache/http/impl/nio/reactor/DefaultConnectingIOReactor could be
extended in order to obtain the DiffServ value from the MessageContext
and then alter the Socket connection, but we are not quite sure as we
don't have the overview needed.

Is there a way we could alter Synapse, Axis 2 and/or
HTTPCommons in order for us to support setting different DiffServ
values to different clients? Hopefully we could alter something which
we could either reach or interact with from a mediator which we have to
write a cuple of anyway.

Wde asked this question to the Apache Synapse mailing list and got the
following reply:


Would setTrafficClass(int tc) of java Socket API work for you? 

You can access the connecting Socket by overrideing 'bind' of
DefaultNHttpClientConnection (httpcore) in LoggingNHttpClientConnection
(synapse) and set tranffic class 

Also, you can modify 'bind' method of DefaultNHttpClientConnection
(httpcore) to set traficclass using provided http parameters of 'bind'

Note: I do not have a good knowledge abut httpcore. So, I may wrong.
Please check with them."""

We have looked into these classes, but can't find anything related to
'bind', or Sockets for that matter, which is why we are asking you
guys. Is there any way we could change the traffic class of client
connection on a per connection basis?

Best regards.
Jørgen Nordmoen <jorgno@stud.ntnu.no>, <nordmoen90@gmail.com>

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