sfa/methods/RenewSliver.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
   5 from sfa.trust.credential import Credential
   6 from dateutil.parser import parse
   7
   8 class RenewSliver(Method):
   9     """
  10     Renews the resources in a sliver, extending the lifetime of the slice.
  11     @param slice_urn (string) URN of slice to renew
  12     @param credentials ([string]) of credentials
  13     @param expiration_time (string) requested time of expiration
  14
  15     """
  16     interfaces = ['geni_am']
  17     accepts = [
  18         Parameter(str, "Slice URN"),
  19         Parameter(type([str]), "List of credentials"),
  20         Parameter(str, "Expiration time in RFC 3339 format")
  21         ]
  22     returns = Parameter(bool, "Success or Failure")
  23
  24     def call(self, slice_xrn, creds, expiration_time):
  25         hrn, type = urn_to_hrn(slice_xrn)
  26
  27         self.api.logger.info("interface: %s\ttarget-hrn: %s\tcaller-creds: %s\tmethod-name: %s"%(self.api.interface, hrn, creds, self.name))
  28
  29         # Validate that at least one of the credentials is good enough
  30         found = False
  31         validCred = None
  32         for cred in creds:
  33             try:
  34                 self.api.auth.check(cred, 'renewsliver')
  35                 validCred = cred
  36                 found = True
  37                 break
  38             except:
  39                 continue
  40
  41         if not found:
  42             raise InsufficientRights('SliverStatus: Credentials either did not verify, were no longer valid, or did not have appropriate privileges')
  43
  44         # Validate that the time does not go beyond the credential's expiration time
  45         requested_time = parse(expiration_time)
  46         if requested_time > Credential(string=validCred).get_lifetime():
  47             raise InsufficientRights('SliverStatus: Credential expires before requested expiration time')
  48
  49         manager_base = 'sfa.managers'
  50
  51         if self.api.interface in ['geni_am']:
  52             mgr_type = self.api.config.SFA_GENI_AGGREGATE_TYPE
  53             manager_module = manager_base + ".geni_am_%s" % mgr_type
  54             manager = __import__(manager_module, fromlist=[manager_base])
  55             return manager.RenewSliver(self.api, slice_xrn, creds, expiration_time)
  56
  57         return ''
  58