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From Oleg Kalnichevski <ol...@apache.org>
Subject Re: Support for DiffServ
Date Fri, 10 Feb 2012 11:06:34 GMT
On Fri, 2012-02-10 at 11:37 +0100, Jørgen Nordmoen wrote:
> Hello.
> 
> 
> 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.
> 
> Question: 
> 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:
> 
> """Hi, 
> 
> 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'
> method. 
> 
> 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?
> 

Please see my response to synapse-dev list.

Oleg



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