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, file = "/etc/geni/aggregates.xml"):
  40         dict.__init__(self, {})
  41         self.api = api
  42
  43         # create default connection dict
  44         connection_dict = {}
  45         for field in self.required_fields:
  46             connection_dict[field] = ''
  47         aggregates_dict = {'aggregates': {'aggregate': [connection_dict]}}
  48         # get possible config file locations
  49         loaded = False
  50         path = os.path.dirname(os.path.abspath(__file__))
  51         filename = file.split(os.sep)[-1]
  52         alt_file = path + os.sep + filename
  53         files = [file, alt_file]
  54
  55         for f in files:
  56             try:
  57                 if os.path.isfile(f):
  58                     self.aggregate_info = XmlStorage(f, aggregates_dict)
  59                     loaded = True
  60             except: pass
  61
  62         # if file is missing, just recreate it in the right place
  63         if not loaded:
  64             self.aggregate_info = XmlStorage(file, aggregates_dict)
  65         self.aggregate_info.load()
  66         self.connectAggregates()
  67
  68
  69     def connectAggregates(self):
  70         """
  71         Get connection details for the trusted peer aggregates from file and
  72         create an GeniClient connection to each.
  73         """
  74         aggregates = self.aggregate_info['aggregates']['aggregate']
  75         if isinstance(aggregates, dict):
  76             aggregates = [aggregates]
  77         if isinstance(aggregates, list):
  78             for aggregate in aggregates:
  79                 # make sure the required fields are present
  80                 if not set(self.required_fields).issubset(aggregate.keys()):
  81                     continue
  82                 hrn, address, port = aggregate['hrn'], aggregate['addr'], aggregate['port']
  83                 if not hrn or not address or not port:
  84                     continue
  85                 # check which client we should use
  86                 # geniclient is default
  87                 client_type = 'geniclient'
  88                 if aggregate.has_key('client') and aggregate['client'] in ['geniclientlight']:
  89                     client_type = 'geniclientlight'
  90
  91                 # create url
  92                 url = 'http://%(address)s:%(port)s' % locals()
  93
  94                 # create the client connection
  95                 # make sure module exists before trying to instantiate it
  96                 if client_type in ['geniclientlight'] and GeniClientLight:
  97                     self[hrn] = GeniClientLight(url, self.api.key_file, self.api.cert_file)
  98                 else:
  99                     self[hrn] = GeniClient(url, self.api.key_file, self.api.cert_file)
 100
 101         # set up a connection to the local registry
 102         # connect to registry using GeniClient
 103         address = self.api.config.GENI_AGGREGATE_HOST
 104         port = self.api.config.GENI_AGGREGATE_PORT
 105         url = 'http://%(address)s:%(port)s' % locals()
 106         self[self.api.hrn] = GeniClient(url, self.api.key_file, self.api.cert_file)
 107