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.record import GeniRecord
9 from sfa.util.genitable import GeniTable
10 from sfa.util.debug import log
11 from sfa.server.registry import Registries
12 from sfa.util.prefixTree import prefixTree
13 from sfa.trust.credential import Credential
15 class resolve(Method):
19 @param cred credential string authorizing the caller
20 @param hrn human readable name to resolve
21 @return a list of record dictionaries or empty list
24 interfaces = ['registry']
27 Parameter(str, "Credential string"),
28 Parameter(str, "Human readable name (hrn)"),
29 Mixed(Parameter(str, "Request hash"),
30 Parameter(None, "Request hash not specified"))
33 returns = [GeniRecord]
35 def call(self, cred, hrn, request_hash=None, caller_cred=None):
37 self.api.auth.authenticateCred(cred, [cred, hrn], request_hash)
38 self.api.auth.check(cred, 'resolve')
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))
46 # load all know registry names into a prefix tree and attempt to find
47 # the longest matching prefix
48 registries = Registries(self.api)
49 hrns = registries.keys()
52 registry_hrn = tree.best_match(hrn)
54 #if there was no match then this record belongs to an unknow registry
56 raise MissingAuthority(hrn)
58 # if the best match (longest matching hrn) is not the local registry,
60 if registry_hrn != self.api.hrn:
61 credential = self.api.getCredential()
64 records = registries[registry_hrn].resolve(credential, hrn, request_hash, caller_cred)
65 good_records = [GeniRecord(dict=record).as_dict() for record in records]
67 arg_list = [credential, hrn]
68 request_hash=self.api.key.compute_hash(arg_list)
69 records = registries[registry_hrn].resolve(credential, hrn, request_hash, caller_cred)
70 good_records = [GeniRecord(dict=record).as_dict() for record in records]
75 # if we still havnt found the record yet, try the local registry
77 records = table.findObjects(hrn)
79 raise RecordNotFound(hrn)
80 for record in records:
82 self.api.fill_record_info(record)
83 good_records.append(dict(record))
84 except PlanetLabRecordDoesNotExist:
85 # silently drop the ones that are missing in PL
86 print >> log, "ignoring geni record ", record['hrn'], \
87 " because pl record does not exist"