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Subject: RE: [ebxml-msg] Message delivery to non-adressable endpoints.
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Dale: Some polling capability is considered in
WS-RX but no agreement yet between proposals. Some proposal is only within the
context of pulling for reliability purpose. Another is more general but
then might as well (should?) be a separate specification, as argued now
in WS-RX. WS-add plays more or less of a role in
these proposals. ebMS PullRequest is a very simple signal that
has not much additional semantics than a general polling signal – and sure
could be replaced. Now the question is how this kind of reuse plays in a
context with several SOAP nodes serialized on an endpoint, each possibly
holding some messages to be pulled (which is the case with ebMS, and its RM
module). The no-reuse solution means a distinct signal
is targeted to each node (e.g. pulling RM-specific messages separately from
ebMS messages). An all-reuse solution would use a single “generic”
poll signal – but we need to see how it will be controlled or targeted
separately for each spec / each node that is on its way (can the same signal be
targeted to more than 1 node so that the same underlying response will piggy-back
all responses, does it only need to distinguish these, on the initiator side, which
SOAP node will initiate the polling? All? Just one?) So a reused-poll-signal solution
sounds attractive but even if one is available today (open standard track, no IP
strings attached…) we need to define first how that is expected to work
in a multi-node env. It’s a bit of un-chartered territory here. Meanwhile a step in a reuse direction
could be to not exclude the use of other poll signals, that could be later “profiled”
for ebMS. Of course either a conformance profile or a P-mode needs to nail down
the interop agreement on this. Jacques From: Dale Moberg
[mailto:dmoberg@cyclonecommerce.com] Hi I am trying to catch up on reading WS-* groups that we are
utilizing in ebMS 3.0. The WS-RX group is discussing how to make use of wsa to do
something that, at least to me, resembles poll/pull MEP. Since one of our goals is to converge ebMS with new WS-*
standards-body-approved specifications for functionality fulfilling ebMS
requirements, I am wondering whether we should consider reusing wsa to do this
rather than make our own signal. The MPF identifier can be probably squeezed
into a field for metadata extensions. Before I contribute a public review remark on this,
does anyone on the TC have some comments on this? Thanks Dale Moberg |
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