sfa/methods/ListResources.py

   1 from sfa.util.faults import *
   2 from sfa.util.namespace import *
   3 from sfa.util.method import Method
   4 from sfa.util.parameter import Parameter, Mixed
   5 from sfa.trust.credential import Credential
   6 from sfatables.runtime import SFATablesRules
   7 import sys
   8
   9
  10 class ListResources(Method):
  11     """
  12     Returns information about available resources or resources allocated to this    slice
  13     @param credential list
  14     @param options dictionary
  15     @return string
  16     """
  17     interfaces = ['geni_am']
  18     accepts = [
  19         Parameter(type([str]), "List of credentials"),
  20         Parameter(dict, "Options")
  21         ]
  22     returns = Parameter(str, "List of resources")
  23
  24     def call(self, creds, options):
  25         self.api.logger.info("interface: %s\tmethod-name: %s" % (self.api.interface, self.name))
  26
  27         # Validate that at least one of the credentials is good enough
  28         found = False
  29         for cred in creds:
  30             try:
  31                 self.api.auth.check(cred, 'listnodes')
  32                 found = True
  33                 user_cred = Credential(string=cred)
  34                 break
  35             except:
  36                 error = sys.exc_info()[:2]
  37                 continue
  38
  39         if not found:
  40             raise InsufficientRights('ListResources: Access denied: %s -- %s' % (error[0],error[1]))
  41
  42         origin_hrn = user_cred.get_gid_caller().get_hrn()
  43
  44         manager_base = 'sfa.managers'
  45
  46         if self.api.interface in ['geni_am']:
  47             mgr_type = self.api.config.SFA_GENI_AGGREGATE_TYPE
  48             manager_module = manager_base + ".geni_am_%s" % mgr_type
  49             manager = __import__(manager_module, fromlist=[manager_base])
  50             rspec = manager.ListResources(self.api, creds, options)
  51             outgoing_rules = SFATablesRules('OUTGOING')
  52
  53
  54         filtered_rspec = rspec
  55         if outgoing_rules.sorted_rule_list:
  56             context = {'sfa':{'user':{'hrn':origin_hrn}, 'slice':{'hrn':None}}}
  57             outgoing_rules.set_context(context)
  58             filtered_rspec = outgoing_rules.apply(rspec)
  59
  60         return filtered_rspec
  61
  62