sfa/methods/resolve.py

   1 ### $Id$
   2 ### $URL$
   3
   4 from sfa.util.faults import *
   5 from sfa.util.method import Method
   6 from sfa.util.parameter import Parameter, Mixed
   7 from sfa.util.auth import Auth
   8 from sfa.util.record import GeniRecord
   9 from sfa.util.debug import log
  10
  11 from sfa.server.registry import Registries
  12
  13 class resolve(Method):
  14     """
  15     Resolve a record.
  16
  17     @param cred credential string authorizing the caller
  18     @param hrn human readable name to resolve
  19     @return a list of record dictionaries or empty list
  20     """
  21
  22     interfaces = ['registry']
  23
  24     accepts = [
  25         Parameter(str, "Credential string"),
  26         Parameter(str, "Human readable name (hrn)")
  27         ]
  28
  29     returns = [GeniRecord]
  30
  31     def call(self, cred, hrn):
  32
  33         self.api.auth.check(cred, 'resolve')
  34         good_records = []
  35         try:
  36             auth_hrn = self.api.auth.get_authority(hrn)
  37             if not auth_hrn:
  38                 auth_hrn = hrn
  39             table = self.api.auth.get_auth_table(auth_hrn)
  40             records = table.resolve('*', hrn)
  41             if not records:
  42                 raise RecordNotFound(hrn)
  43             good_records = []
  44             for record in records:
  45                 try:
  46                     self.api.fill_record_info(record)
  47                     good_records.append(record)
  48                 except PlanetLabRecordDoesNotExist:
  49                     # silently drop the ones that are missing in PL
  50                     print >> log, "ignoring geni record ", record.get_name(), \
  51                               " because pl record does not exist"
  52                     table.remove(record)
  53         except:
  54             # is this a foreign record
  55             registries = Registries(self.api)
  56             credential = self.api.getCredential()
  57             for registry in registries:
  58                 if hrn.startswith(registry) and not registry in [self.api.hrn]:
  59                     records = registries[registry].resolve(credential, hrn)
  60                     good_records = records
  61         dicts = [record.as_dict() for record in good_records]
  62
  63         return dicts
  64