9 from types import StringTypes, ListType
11 from sfa.util.geniserver import GeniServer
12 from sfa.util.geniclient import GeniClient
13 from sfa.util.storage import *
14 from sfa.util.faults import *
16 # GeniLight client support is optional
18 from egeni.geniLight_client import *
20 GeniClientLight = None
23 class Aggregate(GeniServer):
26 # Create a new aggregate object.
28 # @param ip the ip address to listen on
29 # @param port the port to listen on
30 # @param key_file private key filename of registry
31 # @param cert_file certificate filename containing public key (could be a GID file)
32 def __init__(self, ip, port, key_file, cert_file):
33 GeniServer.__init__(self, ip, port, key_file, cert_file)
34 self.server.interface = 'aggregate'
37 # Aggregates is a dictionary of geniclient aggregate connections keyed on the aggregate hrn
39 class Aggregates(dict):
41 required_fields = ['hrn', 'addr', 'port']
43 def __init__(self, api, file = "/etc/sfa/aggregates.xml"):
44 dict.__init__(self, {})
47 # create default connection dict
49 for field in self.required_fields:
50 connection_dict[field] = ''
51 aggregates_dict = {'aggregates': {'aggregate': [connection_dict]}}
52 # get possible config file locations
54 path = os.path.dirname(os.path.abspath(__file__))
55 filename = file.split(os.sep)[-1]
56 alt_file = path + os.sep + filename
57 files = [file, alt_file]
62 self.aggregate_info = XmlStorage(f, aggregates_dict)
66 # if file is missing, just recreate it in the right place
68 self.aggregate_info = XmlStorage(file, aggregates_dict)
69 self.aggregate_info.load()
70 self.connectAggregates()
72 def connectAggregates(self):
74 Get connection details for the trusted peer aggregates from file and
75 create an GeniClient connection to each.
77 aggregates = self.aggregate_info['aggregates']['aggregate']
78 if isinstance(aggregates, dict):
79 aggregates = [aggregates]
80 if isinstance(aggregates, list):
81 for aggregate in aggregates:
82 # make sure the required fields are present
83 if not set(self.required_fields).issubset(aggregate.keys()):
85 hrn, address, port = aggregate['hrn'], aggregate['addr'], aggregate['port']
86 if not hrn or not address or not port:
88 self.interfaces.append(aggregate)
89 # check which client we should use
90 # geniclient is default
91 client_type = 'geniclient'
92 if aggregate.has_key('client') and aggregate['client'] in ['geniclientlight']:
93 client_type = 'geniclientlight'
96 url = 'http://%(address)s:%(port)s' % locals()
98 # create the client connection
99 # make sure module exists before trying to instantiate it
100 if client_type in ['geniclientlight'] and GeniClientLight:
101 self[hrn] = GeniClientLight(url, self.api.key_file, self.api.cert_file)
103 self[hrn] = GeniClient(url, self.api.key_file, self.api.cert_file)
105 # set up a connection to the local registry
106 # connect to registry using GeniClient
107 address = self.api.config.SFA_AGGREGATE_HOST
108 port = self.api.config.SFA_AGGREGATE_PORT
109 url = 'http://%(address)s:%(port)s' % locals()
110 local_aggregate = {'hrn': self.api.hrn, 'addr': address, 'port': port}
111 self.interfaces.append(local_aggregate)
112 self[self.api.hrn] = GeniClient(url, self.api.key_file, self.api.cert_file)