4 from sfa.util.faults import *
5 from sfa.util.method import Method
6 from sfa.util.parameter import Parameter, Mixed
7 from sfa.trust.auth import Auth
8 from sfa.util.config import Config
9 from sfa.plc.nodes import Nodes
10 # RSpecManager_pl is not used. This line is a check that ensures that everything is in place for the import to work.
11 import sfa.rspecs.aggregates.rspec_manager_pl
12 from sfa.trust.credential import Credential
13 from sfatables.runtime import SFATablesRules
15 class get_resources(Method):
17 Get an resource specification (rspec). The rspec may describe the resources
18 available at an authority or the resources being used by a slice.
20 @param cred credential string specifying the rights of the caller
21 @param hrn human readable name of the slice we are interesed in or None
25 interfaces = ['aggregate', 'slicemgr']
28 Parameter(str, "Credential string"),
29 Mixed(Parameter(str, "Human readable name (hrn)"),
30 Parameter(None, "hrn not specified"))
33 returns = Parameter(str, "String representatin of an rspec")
35 def call(self, cred, hrn=None, caller_cred=None):
36 sfa_aggregate_type = Config().get_aggregate_rspec_type()
38 self.api.auth.check(cred, 'listnodes')
43 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 # This code needs to be cleaned up so that 'pl' is treated as just another RSpec manager.
46 # The change ought to be straightforward as soon as we define PL's new RSpec.
48 if (sfa_aggregate_type == 'pl'):
49 nodes = Nodes(self.api, caller_cred=caller_cred)
51 rspec = nodes.get_rspec(hrn)
54 rspec = nodes['rspec']
56 rspec_manager = __import__("sfa.rspecs.aggregates.rspec_manager_"+sfa_aggregate_type, fromlist = ["sfa.rspecs.aggregates"])
57 rspec = rspec_manager.get_rspec(self.api, hrn)
59 # Filter the outgoing rspec using sfatables
60 outgoing_rules = SFATablesRules('OUTGOING')
62 outgoing_rules.set_user(caller_cred.callerGID.hrn) # This is a temporary kludge. Eventually, we'd like to fetch the context requested by the match/target
64 filtered_rspec = outgoing_rules.apply(rspec)