perfsonar development work

[Jason Zurawski <>]

Stijn;

> Hi,
>
>
> I am using the java packages to create a SetupDataRequest and a 
> MetadataKeyRequest for testing purposes. I need to have a 
> perfsonar:subject element, that contains an nmwgt:endPointPair.
>
> I tried using org.ggf.ns.nmwg.tools.org.perfsonar.v1_0.Subject, but 
> that doesn't seem to support an EndPointPair object as its child 
> (Error: see below). 


The perfsonar subject is defined to contain service descriptions or 
interfaces currently (see 
https://svn.internet2.edu/svn/perfsonar/trunk/perfsonar/schema/sonar.rnc).  
Is there a particular reason why you need to use a perfsonar:subject in 
this case?

> As a workaround, I now create a nmwg:subject element (package 
> org.ggf.ns.nmwg.base.v2_0) and then use String operations afterwards 
> to change it to perfsonar:subject. 

This does not sound very efficient, we can talk about adding what you 
need to the element instead of trying to work around the problem in this 
manner. 

> Likewise for the EndPointPair, I use the EndPointPair from the package 
> org.ggf.ns.nmwg.topology.v2_0 and that doesn't result in 
> nmwgt:endPointPair, but generates nmwgtopo:endPointPair instead. Again 
> I use String operations afterwards to convert that to nmwgt:endPointPair.

The prefix (nmwgt or nmwgtopo) is really just a shortcut that maps to a 
namespace.  The actual prefix doesnt matter, as long as it maps to the 
same namespace.  So we could have:

xmlns:foo="http://ggf.org/ns/nmwg/topology/2.0/";
xmlns:bar="http://ggf.org/ns/nmwg/topology/2.0/";
xmlns:nmwgt="http://ggf.org/ns/nmwg/topology/2.0/";

In the same document, and all prefixes would really mean the same 
thing.  Again, using string operations to coerce what you want is 
unecessary here.   So you are using the proper classes.

> As far as I am concerned, I am ok with using String operations, but I 
> don't think that's the point of having these packages and classes. Is 
> this a fault in the classes, or am I using them the wrong way?
>
> Regards,
>
> Stijn
>
> The error I get if I use a 
> org.ggf.ns.nmwg.tools.org.perfsonar.service.v1_0.Subject instead of a 
> org.ggf.ns.nmwg.base.v2_0.Subject:

The service:subject is a little different than the perfsonar:subject, 
which do you think you should be using?  Do you have an example instance 
document I can see?

> Error: org/ggf/ns/nmwg/tools/org/perfsonar/service/v1_0/Subject.java 
> addChild(Element) unrecognized child: 
> org/ggf/ns/nmwg/topology/v2_0/EndPointPair.java: ---> 
> org/ggf/ns/nmwg/topology/v2_0/Src.java: ---> 192.168.217.129 type:ipv4 
> port: dst:org/ggf/ns/nmwg/topology/v2_0/Dst.java: ---> 192.168.217.130 
> type:ipv4 port:

-jason