sfa/methods/RenewSliver.py

   1 from sfa.util.faults import *
   2 from sfa.util.xrn import urn_to_hrn
   3 from sfa.util.method import Method
   4 from sfa.util.parameter import Parameter
   5 from sfa.trust.credential import Credential
   6 from sfa.util.sfatime import utcparse
   7 import datetime
   8
   9 class RenewSliver(Method):
  10     """
  11     Renews the resources in a sliver, extending the lifetime of the slice.
  12     @param slice_urn (string) URN of slice to renew
  13     @param credentials ([string]) of credentials
  14     @param expiration_time (string) requested time of expiration
  15
  16     """
  17     interfaces = ['aggregate', 'slicemgr']
  18     accepts = [
  19         Parameter(str, "Slice URN"),
  20         Parameter(type([str]), "List of credentials"),
  21         Parameter(str, "Expiration time in RFC 3339 format"),
  22         Parameter(str, "call_id"),
  23         ]
  24     returns = Parameter(bool, "Success or Failure")
  25
  26     def call(self, slice_xrn, creds, expiration_time, call_id=""):
  27
  28         (hrn, type) = urn_to_hrn(slice_xrn)
  29
  30         self.api.logger.info("interface: %s\ttarget-hrn: %s\tcaller-creds: %s\tmethod-name: %s"%(self.api.interface, hrn, creds, self.name))
  31
  32         # Find the valid credentials
  33         valid_creds = self.api.auth.checkCredentials(creds, 'renewsliver', hrn)
  34
  35         # Validate that the time does not go beyond the credential's expiration time
  36         requested_time = utcparse(expiration_time)
  37         max_renew_days = int(self.api.config.SFA_MAX_SLICE_RENEW)
  38         if requested_time > Credential(string=valid_creds[0]).get_expiration():
  39             raise InsufficientRights('Renewsliver: Credential expires before requested expiration time')
  40         if requested_time > datetime.datetime.utcnow() + datetime.timedelta(days=max_renew_days):
  41             raise Exception('Cannot renew > %s days from now' % max_renew_days)
  42         manager = self.api.get_interface_manager()
  43         return manager.RenewSliver(self.api, slice_xrn, valid_creds, expiration_time, call_id)
  44