sfa/methods/create_slice.py

   1 ### $Id$
   2 ### $URL$
   3
   4 from sfa.util.faults import *
   5 from sfa.util.misc import *
   6 from sfa.util.method import Method
   7 from sfa.util.parameter import Parameter, Mixed
   8 from sfa.trust.auth import Auth
   9 from sfa.plc.slices import Slices
  10 from sfa.util.config import Config
  11 # RSpecManager_pl is not used. It's used to make sure the module is in place.
  12 import sfa.rspecs.aggregates.rspec_manager_pl
  13 from sfa.trust.credential import Credential
  14 from sfatables.runtime import SFATablesRules
  15
  16
  17 class create_slice(Method):
  18     """
  19     Instantiate the specified slice according to whats defined in the specified rspec
  20
  21     @param cred credential string specifying the rights of the caller
  22     @param hrn human readable name of slice to instantiate
  23     @param rspec resource specification
  24     @return 1 is successful, faults otherwise
  25     """
  26
  27     interfaces = ['aggregate', 'slicemgr']
  28
  29     accepts = [
  30         Parameter(str, "Credential string"),
  31         Parameter(str, "Human readable name of slice to instantiate"),
  32         Parameter(str, "Resource specification"),
  33         ]
  34
  35     returns = Parameter(int, "1 if successful")
  36
  37     def call(self, cred, hrn, requested_rspec, caller_cred=None):
  38         if caller_cred==None:
  39             caller_cred=cred
  40
  41         self.api.auth.check(cred, 'createslice')
  42
  43         #log the call
  44         self.api.logger.info("interface: %s\tcaller-hrn: %s\ttarget-hrn: %s\tmethod-name: %s"%(self.api.interface, Credential(string=caller_cred).get_gid_caller().get_hrn(), hrn, self.name))
  45
  46         sfa_aggregate_type = Config().get_aggregate_rspec_type()
  47         rspec_manager = __import__("sfa.rspecs.aggregates.rspec_manager_"+sfa_aggregate_type, fromlist = ["sfa.rspecs.aggregates"])
  48         #Filter the incoming rspec using sfatables
  49         incoming_rules = SFATablesRules('OUTGOING')
  50
  51         #incoming_rules.set_slice(hrn) # This is a temporary kludge. Eventually, we'd like to fetch the context requested by the match/target
  52
  53         contexts = incoming_rules.contexts
  54         request_context = rspec_manager.fetch_context(hrn, Credential(string=caller_cred).get_gid_caller().get_hrn(), contexts)
  55         incoming_rules.set_context(request_context)
  56         rspec = incoming_rules.apply(requested_rspec)
  57         rspec = requested_rspec
  58
  59
  60         if (sfa_aggregate_type == 'pl'):
  61             slices = Slices(self.api, caller_cred=caller_cred)
  62             slices.create_slice(hrn, rspec)
  63         else:
  64             # To clean up after July 21 - SB
  65             rspec = rspec_manager.create_slice(self.api, hrn, rspec)
  66
  67
  68         return 1