-----Original Message-----
From: Meeraj Kunnumpurath [mailto:[EMAIL PROTECTED]
Sent: Tuesday, August 15, 2006 7:48 PM
To: [email protected]
Subject: RE: Create distribution for bindings, or how to
switch binding
implementations
Jervis,
Few thoughts ...
I think flexibility and ease of use is important in terms of
switching
between bindings, not just two implementations of the same transport
(for example axis and XFire for WS binding), but also between two
different transports (WS and JMS for example). With one of the ESBs I
have been using it is as simple as switching the protocol in the
endpoint URI for the target component. For example, you can switch
between Axis to XFire, by changing the endpoint URI of the component
from axis:http://localhost:81/services to
xfire:http://localhost:81/services, and if you want to switch
from WS to
JMS, it is as simple as changing the URI to jms://myQueue. I think
the
gist is providing the flexibility to expose the services over
a variety
of transports, even more than one if that is deemed
necessary. According
to my understanding this issues are all addressed by the SCA spec.
I think the spec mandates support for SCA and web services
bindings and
talks about having extensibility mechanisms for other kinds
of bindings.
Though it should be possible to expose services across multiple
bindings, multiple implementations of the same transport
(XFire and Axis
for example) wouldn't make much sense, as the implementation
type itself
is transparent to the service consumer, unless different
ports are used
by the different bindings. I think, may be the issue is the mandatory
binding binding.ws from the spec perspective. You could look at
binding.ws as the default WS binding used by the SCA runtime
implementation (using axis for example) and to use a different WS
binding one could use the extension model and have a binding like
binding.ws.xfire.
Ta
Meeraj
-----Original Message-----
From: Liu, Jervis [mailto:[EMAIL PROTECTED]
Sent: 15 August 2006 03:56
To: [email protected]
Subject: Create distribution for bindings, or how to switch binding
implementations
Hi,
I can see from yesterday's IRC chat that we had a quick discussion on
how to create distribution for bindings. I think the main
problem we are
facing is how to switch binding implementations. For example, we may
want to switch the implementation of binding.ws between axis2
and celtix
for helloworldws sample, in an easy and user friendly way.
The approach
Jeremy proposed should work: package the binding as an extension and
somehow install it into the runtime(put it into the extension
dir?) . So
this is definitely one option. But I think we should also provide
alternatives to better address following scenarios:
1, Tuscany users installed a generic Tuscany distribution, and they
would like to be able to switch binding implementations without
moving
libraries around or changing any directories. I think we can improve
usability if users only need to change a config file.
2. Some applications may want to use two binding
implementations at the
same time.
It seems to me that we will need a configuration somewhere to specify
the specific binding implementation. Can we have a
proprietary entry in
scdl file sth like <binging.ws.axis2/> or <binding.ws
bindingImplementation=axis/>? Any comments are welcome. To
better track
this thread, I have created jira 621.
https://issues.apache.org/jira/browse/TUSCANY-621. I also enclosed
relevant IRC chat log for your info.
Thanks,
Jervis
(05:27:47) cr22rc: jboynes : I'm ok about taking it out ..
but what are
we looking for doing for samples needing axis wsbservice binding
(05:28:44) jboynes: I want to package the axis binding as an
extension
that can be installed in the runtime
(05:29:46) jboynes: so to run the sample you add the axis
extension to
your installation
(05:30:43) ant: or we may have a distribution that includes
axis right?
(05:31:03) jboynes: sure
(05:32:32) jboynes: I want to make sure that the basic
concept (core + a
bunch of extensions) works
(05:33:19) kgoodson left the room (quit: Read error: 110 (Connection
timed out)).
(05:33:23) ant: could we talk about the ServletHost stuff now?
(05:33:33) jboynes: so we don't end up in a situation where
an extension
only works if it is packed into a distro in a special way
(05:33:40) jboynes: I need a couple more
(05:33:48) jboynes: I need to eat
(05:35:32) ant: ok, well ping when you're ready
(05:48:04) jboynes: ant: hi, better now I've had breakfast :)
(05:48:30) ant: yum
(05:48:31) jboynes: sorry for holding things up - I just reached the
pass out or get cranky phase
(05:48:48) dkulp left the room (quit: "using sirc version
2.211+KSIRC/1.3.12").
(05:49:19) ant: ok so there's an interface ServletHost
(05:50:02) jboynes: yep
(05:50:10) ant: so the WS binding should use that to register
a servlet
for each ws endpoint
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