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Subject: Re: [wsrp] Wildcard notation in event names



We had a discussion about this ... basically the match algorithm is that the event name must start with the string before the '*' character. The '/' is in used as the example for making hierarchical names as this matches the syntax for WSN Topics and makes supporting both (should a Producer choose to do so) easier.

I have updated the section reference to 5.1.15 in draft 10 ... wish I knew why Word is willing to keep only some of these references in sync.

Rich



Subbu Allamaraju <subbu@bea.com>

05/27/05 04:57 PM

To
wsrp <wsrp@lists.oasis-open.org>
cc
Subject
[wsrp] Wildcard notation in event names





In Section 5.1.11, we have some text about using wildcard notation. Here
is the text:

"Since an event’s name can be refered to in a wildcard fashion (see
section 2.1.2), Portlet developers are encouraged to organize their
event names hierarchically. An example of such an organization would be
events carrying changed address information on an application being
organized as “applicant/address/streetChanged”,
“applicant/address/cityChanged”, etc.. Such an organization would allow
another Portlet’s metadata to simply say that it is interested in all
events starting with “applicant/address/”. The use of the “/” character
to denote levels within such a hierarchy is suggested as a means to
enable easier reading of these hierarchical event names, but should not
be taken to imply that the event names are treated as XPaths since they
are not XPaths."

[Note that Section 2.1.2 does not exist in Draft 9.]

This text does not clearly say that using "/" is THE spec-defined way of
organizing events into hierarchical groups. The use of "/" is introduced
 directly in an example, and not in the preceding text on event names.
IMO, the intent is not well-captured, and could be interpreted differently.

Secondly, it is not clear if a Consumer can choose not to support
hierarchical naming of events. If a portlet says that it would like to
receive "/foo" events, and if another portlet fires a "/foo/bar" event,
can the Consumer do an exact match on event names and not dispatch the
event? Or, SHOULD/MUST the consumer try to match?

Comments?

Regards,
Subbu

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