That would be an excellent idea, thanks. Possibly the original rationale might have been that any service on an object would be expected to be related to the object's data (and therefore bind to a datastream). However since an object's data can be exposed using the resource index (and "binding" it to the object using the $pid default parameter mechanism), then datastream binding should not actually be required.
Steve -----Original Message----- From: aj...@virginia.edu [mailto:aj...@virginia.edu] Sent: 14 November 2010 13:13 To: Support and info exchange list for Fedora users. Subject: Re: [fcrepo-user] "Dissemination Binding Info contained no data"error for method without datastreams This has been the case since the pre-CMA bdef/bmech/object days, I believe. It was inelegant then. I don't see a Jira task focused on ameliorating the issue. Shall I create one with some examples, or is this something that ought be handled as part of some other issue? --- A. Soroka Digital Research and Scholarship R & D and Online Library Environment the University of Virginia Library On Nov 12, 2010, at 7:37 PM, Steve Bayliss wrote: > Hello Eugene > > You're not missing something, the way things are structured in the CMA at > the moment any implementation (definition) of a method expects to have a > datastream as an input, which doesn't allow for services that indirectly > make use of an object's properties/information eg through an RI query. > > So it's a kind of a hack, but it's also useful to know how people see the > CMA being used "in the field" to guide what the CMA should look like in the > future. > > Steve > > -----Original Message----- > From: Eugene Wolfson [mailto:evulfson+fed...@gmail.com] > Sent: 12 November 2010 21:42 > To: fedora-commons-users@lists.sourceforge.net > Subject: Re: [fcrepo-user] "Dissemination Binding Info contained no data" > error for method without datastreams > > > The solution is to add the DC datastream to the DSINPUTSPEC of the > service deployment object. You don't even need to use the DC > datastream anywhere, as far as I can tell (for instance in the WSDL > datastream). I guess there's no harm to adding the dc datastream to > each method, but it still feels like a hack to add an unused > datastream, or am I missing something? > > - Eugene Wolfson > > On Fri, Nov 12, 2010 at 4:28 PM, Eugene Wolfson > <evulfson+fed...@gmail.com> wrote: >> Hello, >> >> I am getting the following error when going to >> http://example.org/fedora/get/someNS:somePID/someNS:Sequence/list_members >> org.fcrepo.server.errors.DisseminationBindingInfoNotFoundException: >> [DisseminationService] Dissemination Binding Info contained no data >> My situation is similar to that described at >> https://wiki.duraspace.org/spaces/viewthread.action?key=FCKB&id=8750770 >> in that I am using an object that has no datastreams other than >> RELS-EXT or DC. Can I use a method with a service, without binding a >> datastream to it? What's a good approach to >> >> ---- >> Here are some more specifics: >> >> I am trying to implement a sequence in fedora-commons, using the CMA. >> >> Again, I have a simple data object that has no datastreams, other than >> RELS-EXT and DC. >> Its content model has a Sequence service definition and deployment. >> The sequence service is as follows: >> It has two methods: >> method="list_members" label="An xml unordered list of members in > the >> collection" >> method="get_member" label="Retrieves the pid of the member at the > given index" >> Each method has a url-pattern to an risearch sparql query with >> <default-input name="uri" value="$objuri"/> >> <default-input name="FORMAT" value="Sparql"/> >> I verified that the query is valid by testing with both the risearch >> GUI at /fedora/risearch and by pasting the encoded form of the query >> into a browser, with (parameters) replaced by actual values - and I >> get the result I expected. >> >> I attached the ezDep and ezDef and also, the actual foxml for the >> SequenceImpl. The only difference between the SequenceEzDep and >> SequenceImpl is that SequenceImpl is a contractor of more than one >> content model - I couldn't figure out how to list more than one cmodel >> entry in ezDep. >> >> >> Thank you, >> >> Eugene W. >> >> P.S. Sorry if this was double sent. >> > > ---------------------------------------------------------------------------- > -- > Centralized Desktop Delivery: Dell and VMware Reference Architecture > Simplifying enterprise desktop deployment and management using > Dell EqualLogic storage and VMware View: A highly scalable, end-to-end > client virtualization framework. 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