Keith, great piece of work. Is there a way to give preference to content-types too, during the negotiation?
Ok let me tell one use case why I like content negotiations enabled for conversations. As we might know already, when we do performance analysis of Axis2, we send large number of messages to a server. This includes sending increasingly large (in size) messages as well. Also these metrics involve measuring the usage of network bandwidth, etc., If we can enable cont-neg at conversation level, you can see how we will win, especially when Axis2 client talks to Axis2 servers. One might think this as a hack, but obviously there should be some advantage, when Axis2 client talk to another Axis2 server/client. This will be ok, with request level cont-negotiation, but will be optimal/useful with conversation level. Thanks, Chinthaka On Mon, Sep 22, 2008 at 2:03 PM, Sanjiva Weerawarana <[EMAIL PROTECTED]>wrote: > Ah excellent! So does the message formatter get selected based on the > accept headers sent (which refer to media types IIRC)? That's perfect. > > Chinthaka, the idea of bringing content negotiation into SOAP is > interesting but IMO not that useful. While content neg is a favorite > RESTafarian feature, the reality is that it hasn't really proved its mettle. > I wanted us to do it because its a simple thing for us to do with our > architecture and because for pure HTTP there are some usecases, esp. with > pure HTTP scenarios where the browser is involved. > > I can't find the comment right now but Larry Messinter, who proposed > content neg into the http spec, later regretted it. IIRC the quote and ref > is in my ws-* vs. rest presentation somewhere! > > Sanjiva. > > > keith chapman wrote: > > Hi Chinthaka, > > I did implement content-negotiation in Axis2 some time ago [1]. It was > implemented using the Accept header. It can be enabled by adding the > following parameter to the axis2.xml > > <parameter name="httpContentNegotiation">true</parameter> > > Thanks, > Keith. > > [1] http://markmail.org/message/mbnxc2ysq2bt7v6a > > On Mon, Sep 22, 2008 at 8:53 PM, Eran Chinthaka <[EMAIL PROTECTED]>wrote: > >> Since our discussion is over on Faults and JSON messages, let's discuss >> one of the good points raised by Dr. Sanjiva. >> >> I think content negotiation is a cool feature to have, especially when we >> are using HTTP. This is one of the features I personally definitely like to >> have. >> >> Are you guys thinking of using cont-neg on transport level, or will it be >> sth like we did for service group context using a SOAP header? >> If we check how browsers and Web servers do content negotiation, it is >> mainly using Accept, Accept-Encoding, Accept-Charset, etc., header. I think >> this can be easily done within Axis2 too. >> >> But the problem with this approach is that, this cont-neg should happen >> for every message. If we find out a way to do this for a conversation, it'd >> great. Basically a client must ask from a server, the content types it can >> support and client can then use those types to send messages later. This >> also can be tricky as sometimes Web services server itself might restrict >> some content types only for some operations. >> >> Even if one of us won't be doing this, this is sth a new comer can easily >> tackle if we list this on tasks to be done list (if we have one ;) ) >> >> What do you all think? >> >> -- >> With Mettha, >> Eran Chinthaka >> >> -------------------------------------------------------------------- >> Health is the greatest gift; contentment is the greatest wealth; trusting >> is the best relationship; nirvana is the highest joy. - Dhammapada >> >> > > > -- > Keith Chapman > Senior Software Engineer > WSO2 Inc. > Oxygenating the Web Service Platform. > http://wso2.org/ > > blog: http://www.keith-chapman.org > > > -- > Sanjiva Weerawarana, Ph.D. > Founder & Director; Lanka Software Foundation; http://www.opensource.lk/ > Founder, Chairman & CEO; WSO2, Inc.; http://www.wso2.com/ > Member; Apache Software Foundation; http://www.apache.org/ > Visiting Lecturer; University of Moratuwa; http://www.cse.mrt.ac.lk/ > > Blog: http://sanjiva.weerawarana.org/ > > --------------------------------------------------------------------- To > unsubscribe, e-mail: [EMAIL PROTECTED] For additional > commands, e-mail: [EMAIL PROTECTED] -- With Mettha, Eran Chinthaka -------------------------------------------------------------------- Health is the greatest gift; contentment is the greatest wealth; trusting is the best relationship; nirvana is the highest joy. - Dhammapada
