geni/registry.py

   1 ##
   2 # Registry is a GeniServer that implements the Registry interface
   3
   4 import tempfile
   5 import os
   6 import time
   7 import sys
   8
   9 from geni.util.geniserver import GeniServer
  10 from geni.util.geniclient import GeniClient
  11 # GeniLight client support is optional
  12 try:
  13     from egeni.geniLight_client import *
  14 except ImportError:
  15     GeniClientLight = None
  16 from geni.util.genitable import GeniTable
  17 from geni.util.excep import *
  18 from geni.util.storage import *
  19
  20
  21 #
  22
  23
  24 ##
  25 # Registry is a GeniServer that serves registry and slice operations at PLC.
  26
  27 class Registry(GeniServer):
  28     ##
  29     # Create a new registry object.
  30     #
  31     # @param ip the ip address to listen on
  32     # @param port the port to listen on
  33     # @param key_file private key filename of registry
  34     # @param cert_file certificate filename containing public key (could be a GID file)
  35
  36     def __init__(self, ip, port, key_file, cert_file):
  37         GeniServer.__init__(self, ip, port, key_file, cert_file)
  38         self.server.interface = 'registry'
  39
  40
  41 ##
  42 # Registries is a dictionary of geniclient registry connections keyed on the registry
  43 # hrn
  44
  45 class Registries(dict):
  46
  47     required_fields = ['hrn', 'addr', 'port']
  48
  49     def __init__(self, api):
  50         dict.__init__(self, {})
  51         self.api = api
  52         registries_file = self.api.server_basedir + os.sep + 'registries.xml'
  53         connection_dict = {}
  54         for field in self.required_fields:
  55             connection_dict[field] = ''
  56         self.registry_info = XmlStorage(registries_file, {'registries': {'registry': [connection_dict]}})
  57         self.registry_info.load()
  58         self.connectRegistries()
  59
  60     def connectRegistries(self):
  61         """
  62         Get connection details for the trusted peer registries from file and
  63         create an GeniClient connection to each.
  64         """
  65         registries = self.registry_info['registries']['registry']
  66         if isinstance(registries, dict):
  67             registries = [registries]
  68         if isinstance(registries, list):
  69             for registry in registries:
  70                 # make sure the required fields are present
  71                 if not set(self.required_fields).issubset(registry.keys()):
  72                     continue
  73                 hrn, address, port = registry['hrn'], registry['addr'], registry['port']
  74                 if not hrn or not address or not port:
  75                     continue
  76
  77                 # check which client we should use
  78                 # geniclient is default
  79                 client_type = 'geniclient'
  80                 if registry.has_key('client') and registry['client'] in ['geniclientlight']:
  81                     client_type = 'geniclientlight'
  82
  83                 # create url
  84                 url = 'http://%(address)s:%(port)s' % locals()
  85
  86                 # create the client connection
  87                 # make sure module exists before trying to instantiate it
  88                 if client_type in ['geniclientlight'] and GeniClientLight:
  89                     self[hrn] = GeniClientLight(url, self.api.key_file, self.api.cert_file)
  90                 else:
  91                     self[hrn] = GeniClient(url, self.api.key_file, self.api.cert_file)
  92
  93         # set up a connection to the local registry
  94         # connect to registry using GeniClient
  95         address = self.api.config.GENI_REGISTRY_HOSTNAME
  96         port = self.api.config.GENI_REGISTRY_PORT
  97         url = 'http://%(address)s:%(port)s' % locals()
  98         self[self.api.hrn] = GeniClient(url, self.api.key_file, self.api.cert_file)
  99