One question inline below ...
From: Mike Edwards
[mailto:]
Sent: Thursday, Feb 21, 2008 8:15
AM
To: OASIS Bindings
Subject: RE: [sca-bindings]
ISSUE-22: The Bindings specifications should provide exemplary Implementations
for a) Callbacks and b) Conversations
Peter,
Interesting question - and an interesting answer
too.
1) For conversational, since
this is an intent, a bindingType simply must list the "conversational" intent
in its
@alwaysProvides or @mayProvide attribute - if @mayProvide, then there needs
to
also be a PolicySet which
contains a policy which provides the "conversational"
intent.
2) For callback, we have a problem. There is no intent "callback"
at the moment. Callbacks are defined by
various mechanisms, but none of them are intents.
So, there is no obvious mechanism by which a
bindingType can indicate that it supports callbacks.
Perhaps we should invent a new intent "callback" and
then also define that it is "automatically" set whenever
there is other metadata that indicates that there is a
callback interface - it can also be specified explictly using
the @requires attribute. If that is done, then a
bindingType can indicate its support as for conversational.
<Sanjay> Under what circumstances would it be useful
to specify the 'callback' intent via the @requires attribute (and not depend
upon the interface to express that there exists a callback)
</Sanjay>
Yours, Mike.
Strategist - Emerging
Technologies, SCA & SDO.
Co Chair OASIS SCA Assembly TC.
IBM Hursley
Park, Mail Point 146, Winchester, SO21 2JN, Great Britain.
Phone & FAX:
+44-1962-818014 Mobile: +44-7802-467431
Email:
"Peshev, Peter"
<>
21/02/2008 16:02
To
"Eric Johnson"
<>, Mike Edwards/UK/IBM@IBMGB
cc
"OASIS Bindings"
<>
Subject
RE: [sca-bindings] ISSUE-22: The
Bindings specifications should provide exemplary Implementations
for a) Callbacks and b) Conversations
Hi,
just a question about that issue, how a binding
should declare the support or lack of support of those features. Is it by
intents "Callbackable" , "Conversational" , "NotSupportedCallback" ,
etc. ?
Peter
From: Eric Johnson [mailto:]
Sent: Monday, 4. February 2008 21:45
To: Mike
Edwards
Cc: OASIS Bindings
Subject: Re: [sca-bindings]
ISSUE-22: The Bindings specifications should provide exemplary Implementations
for a) Callbacks and b) Conversations
Logged as http://www.osoa.org/jira/browse/BINDINGS-22
-Eric.
Mike Edwards wrote:
Raiser:
Mike Edwards
Target: Web
Services Binding specification, JMS Binding Specification, JCA Binding
Specification
Description:
At present, it is not clear which, if any, of the Bindings
specifications enable the implementation of two important
features of SCA
described in the Assembly specification - namely Callback interfaces and
Conversational
interfaces.
Each of the Bindings specifications should explicitly declare if it
is possible to support each of these features.
For each of the Bindings
specifications that claim to support either or both of these features, the
specification
should provide a full description of at least one exemplary
implementation of the feature using the Binding
technology described in the
specification. Multiple alternative implementations are permitted and
may be
added to
the specification.
For example, it may be possible to implement Callbacks using
WS-Addressing capabilities with Web services.
If so, and example, showing the use of appropriate
features of WS-Addressing and other relevant WS-*
capabilities should be added to the
specification. If an alternative exists using (say) WS-Context, then
an
example based
on that technology can also be provided.
Proposal:
None at present.
Yours,
Mike.
Strategist - Emerging Technologies, SCA & SDO.
Co
Chair OASIS SCA Assembly TC.
IBM Hursley Park, Mail Point 146, Winchester,
SO21 2JN, Great Britain.
Phone & FAX: +44-1962-818014
Mobile: +44-7802-467431
Email:
Unless stated otherwise above:
IBM
United Kingdom Limited - Registered in England and Wales with number 741598.
Registered office: PO Box 41, North Harbour, Portsmouth, Hampshire PO6
3AU
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