Resource.description is an optional parameter, but Resource.toXML() fails if it is not set

[chaos@bbn.com]

I tested with this modified gmoc.py snippet, which tries to pretty-print a resource's XML after creating it:

  1663          # add resource nodes
  1664          for res in resources.values():
  1665              node = res.toXML(doc, root)
  1666              print node.toprettyxml()

With this, the code:

...
  resource[datapath] = gmoc.Resource(
                         resource_urn,
                         type = 'datapath',
                         pop = pop,
                         operator = organization,
                         description = ''
                       )
...
data.store(pop)

yields:

<resource aggregate="foam5.gpolab.bbn.com" description="" name="urn:publicid:IDN+openflow:foam:foam5.gpolab.bbn.com+datapath+04:4d:00:12:e2:b8:a5:d0" organization="urn:publicid:IDN+gmoc.geni.net+organization+BBN" pop="gpolab" type="datapath"/>

whereas the code:

...
  resource[datapath] = gmoc.Resource(
                         resource_urn,
                         type = 'datapath',
                         pop = pop,
                         operator = organization,
                       )
...
data.store(pop)

yields:

Traceback (most recent call last):
  File "./report_foam_relations", line 336, in <module>
    data.store(pop)
  File "/home/chaos/gmoc.py", line 1666, in store
    print node.toprettyxml()
  File "/usr/lib/python2.6/xml/dom/minidom.py", line 59, in toprettyxml
    self.writexml(writer, "", indent, newl)
  File "/usr/lib/python2.6/xml/dom/minidom.py", line 812, in writexml
    _write_data(writer, attrs[a_name].value)
  File "/usr/lib/python2.6/xml/dom/minidom.py", line 301, in _write_data
    data = data.replace("&", "&amp;").replace("<", "&lt;")
AttributeError: 'NoneType' object has no attribute 'replace'

Either description should be a mandatory attribute of gmoc.Resource, or Resource.toXML() should not blow up when it is omitted.

[chaos@bbn.com]

This is fixed in v0.5.0.