+
+
+# Thierry : caching at the slicemgr level makes sense to some extent
+caching=True
+#caching=False
+def ListResources(api, creds, options, call_id):
+
+ if Callids().already_handled(call_id):
+ api.logger.info("%d received ListResources with known call_id %s"%(api.interface,call_id))
+ return ""
+
+ # get slice's hrn from options
+ xrn = options.get('geni_slice_urn', '')
+ (hrn, type) = urn_to_hrn(xrn)
+
+ # get hrn of the original caller
+ origin_hrn = options.get('origin_hrn', None)
+ if not origin_hrn:
+ if isinstance(creds, list):
+ origin_hrn = Credential(string=creds[0]).get_gid_caller().get_hrn()
+ else:
+ origin_hrn = Credential(string=creds).get_gid_caller().get_hrn()
+
+ # look in cache first
+ if caching and api.cache and not xrn:
+ rspec = api.cache.get('nodes')
+ if rspec:
+ return rspec
+
+ # get the callers hrn
+ valid_cred = api.auth.checkCredentials(creds, 'listnodes', hrn)[0]
+ caller_hrn = Credential(string=valid_cred).get_gid_caller().get_hrn()
+
+ # attempt to use delegated credential first
+ credential = api.getDelegatedCredential(creds)
+ if not credential:
+ credential = api.getCredential()
+ threads = ThreadManager()
+ for aggregate in api.aggregates:
+ # prevent infinite loop. Dont send request back to caller
+ # unless the caller is the aggregate's SM
+ if caller_hrn == aggregate and aggregate != api.hrn:
+ continue
+ # get the rspec from the aggregate
+ server = api.aggregates[aggregate]
+ my_opts = copy(options)
+ my_opts['geni_compressed'] = False
+ threads.run(server.ListResources, credential, my_opts, call_id)
+ #threads.run(server.get_resources, cred, xrn, origin_hrn)
+
+ results = threads.get_results()
+ merged_rspec = merge_rspecs(results)
+
+ # cache the result
+ if caching and api.cache and not xrn:
+ api.cache.add('nodes', merged_rspec)