perfsonar development work

[Yee-Ting Li <>]

Thanks for the response Maciej,

Regarding the 3 question, i do include the <eventType/> element; and  
the query works fine; however, if i try to return some other text  
(such as an escaped xml element), i the report responds with that error:

sending the following to http://selena.acad.bg:8070/axis/services/ 
LookupService:
===
<nmwg:message
  type="LSQueryRequest"
  id="#lsQuery1"
  xmlns:nmwg="http://ggf.org/ns/nmwg/base/2.0/";
  xmlns:xquery="http://ggf.org/ns/nmwg/tools/org/perfsonar/service/ 
lookup/xquery/1.0/">

  <nmwg:metadata id="#meta1">

    <xquery:subject id="#sub1">

        declare namespace nmwg="http://ggf.org/ns/nmwg/base/2.0/";;
        declare namespace perfsonar="http://ggf.org/ns/nmwg/tools/ 
org/perfsonar/1.0/";
        declare namespace psservice="http://ggf.org/ns/nmwg/tools/ 
org/perfsonar/service/1.0/";
        declare namespace xquery="http://ggf.org/ns/nmwg/tools/org/ 
perfsonar/service/lookup/xquery/1.0/";
        declare namespace netutil="http://ggf.org/ns/nmwg/ 
characteristic/utilization/2.0/";
        declare namespace nmwgt="http://ggf.org/ns/nmwg/topology/2.0/";;

        for $data in /nmwg:store/nmwg:data
                let $endpoint := data($data/@metadataIdRef)
                let $interface := data($data/nmwg:metadata/ 
netutil:subject/nmwgt:interface/nmwgt:ifAddress[@type="ipv4"])
                return hello $interface

    </xquery:subject>
    <nmwg:eventType>service.lookup.xquery</nmwg:eventType>

  </nmwg:metadata>

  <nmwg:data metadataIdRef="#meta1"/>

</nmwg:message>
====

Returns
====
<nmwg:message xmlns:nmwg="http://ggf.org/ns/nmwg/base/2.0/";  
id="#lsQuery1_resp" messageIdRef="#lsQuery1" type="LSQueryResponse">
  <nmwg:metadata id="resultCodeMetadata">
    <nmwg:eventType>error.common.storage.xmldb.query</nmwg:eventType>
  </nmwg:metadata>
  <nmwg:data id="resultDescriptionData_for_resultCodeMetadata"  
metadataIdRef="resultCodeMetadata">
    <nmwgr:datum xmlns:nmwgr="http://ggf.org/ns/nmwg/result/ 
2.0/">Can't perform XQuery: org.exist.xquery.StaticXQueryException:  
unexpected token: $ [at line 12, column
    30]</nmwgr:datum>
  </nmwg:data>
</nmwg:message>
====

However, removing the 'hello' works fine. i've also tried playing  
around with '{}'s but that also reports the same error.

Cheers,

Yee.


On 28 Mar 2007, at 00:33, Maciej Glowiak wrote:

> Hi Yee,
>
> Yee-Ting Li napisał(a):
> > i' ve been playing around with the lookup service for some  
> > automated analysis.
> > i have a few problems i was hoping someone could shed some light on:
> > 1) when i query the LS, it appears that all data within the  
> > response's <psservice:datum/> elements are returned as a string  
> > (ie. the < and > become &lt; and &gt;); is this normal?
> Yes, that's normal behaviour. In fact, the responce for XQuery may  
> be any XML (or even not valid XML, just a string without root  
> element), so we decided to encode XML. Of course in most of cases  
> the content will be NMWG but we cannot guarantee it.
>
>
>
> > 2) with registered netutil metadata (showing the interface's  
> > metadata), the supplied entries do not appear to be namespaced  
> > correctly; nmwgt is not defined as a namespace within the service.
>
> Services register by themselves, so perhaps the mistake is in the  
> registration message. LS stores everything what was sent to be  
> registered.
>
> > 3) queries where i try to use the standard '{}' and element  
> > definitions to format the output of the query do not appear to  
> > work with an error 'xmltypelsserviceengine: no eventType in  
> > metadata (type of query) error.
>
> You must use <eventType>...</enventType> inside subjests. Now I  
> don't have the details for that, but you may see the example of  
> query request (LSLookupRequest) on the SVN (or the tarball release)  
> in schema/example-instances/.../LS/test
> (sorry for not providing you all the details but I am on the  
> meeting and have just configured network) :)
>
> If it doesn't help, let me know, I'll provide more details.
>
> Best regards
>
> Maciej