sfa/methods/Resolve.py

   1 ### $Id: resolve.py 17157 2010-02-21 04:19:34Z tmack $
   2 ### $URL: https://svn.planet-lab.org/svn/sfa/trunk/sfa/methods/resolve.py $
   3 import traceback
   4 import types
   5 from sfa.util.faults import *
   6 from sfa.util.xrn import urn_to_hrn
   7 from sfa.util.method import Method
   8 from sfa.util.parameter import Parameter, Mixed
   9 from sfa.trust.credential import Credential
  10 from sfa.util.record import SfaRecord
  11
  12 class Resolve(Method):
  13     """
  14     Resolve a record.
  15
  16     @param cred credential string authorizing the caller
  17     @param hrn human readable name to resolve (hrn or urn)
  18     @return a list of record dictionaries or empty list
  19     """
  20
  21     interfaces = ['registry']
  22
  23     accepts = [
  24         Mixed(Parameter(str, "Human readable name (hrn or urn)"),
  25               Parameter(list, "List of Human readable names ([hrn])")),
  26         Mixed(Parameter(str, "Credential string"),
  27               Parameter(list, "List of credentials)"))
  28         ]
  29
  30     returns = [SfaRecord]
  31
  32     def call(self, xrns, creds):
  33         if not isinstance(xrns, types.ListType):
  34             xrns=[xrns]
  35         hrns = [urn_to_hrn(xrn)[0] for xrn in xrns]
  36
  37         #find valid credentials
  38         valid_creds = self.api.auth.checkCredentials(creds, 'resolve')
  39
  40         #log the call
  41         origin_hrn = Credential(string=valid_creds[0]).get_gid_caller().get_hrn()
  42         self.api.logger.info("interface: %s\tcaller-hrn: %s\ttarget-hrn: %s\tmethod-name: %s"%(self.api.interface, origin_hrn, hrns, self.name))
  43
  44         # send the call to the right manager
  45         manager = self.api.get_interface_manager()
  46         return manager.resolve(self.api, xrns)
  47
  48
  49