geni/aggregate.py

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