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'''XMLRPC/SSL Communication Library (following the ssslib API)'''
__revision__ = '$Revision:$'
from lxml.etree import XML
from ConfigParser import ConfigParser
from xmlrpclib import Fault, ServerProxy
from sys import exc_info
from traceback import extract_tb
class CommunicationError(Exception):
'''Duplicate the sss.ssslib error API'''
pass
class comm_lib(object):
'''This sets up the communication for XMLRPC Bcfg2'''
def __init__(self):
self.cf = ConfigParser()
self.cf.read('/etc/bcfg2.conf')
location = self.cf.get("components", "bcfg2")
self.proxy = ServerProxy(location)
self.user = 'root'
self.password = self.cf.get("communication", "password")
def ClientInit(self, component):
'''Return a single dummy handle'''
return "handle"
def SendMessage(self, handle, msg):
'''Encode the XML msg as an XML-RPC request'''
data = XML(msg)
args = (self.user, self.password)
if data.tag == 'get-probes':
funcname = "GetProbes"
elif data.tag == 'probe-data':
funcname = "RecvProbeData"
args = (self.user, self.password, data.getchildren())
elif data.tag == 'get-config':
funcname = 'GetConfig'
elif data.tag == 'upload-statistics':
funcname = "RecvStats"
args = (self.user, self.password, msg)
else:
print "unsupported function call"
raise CommunicationError, "foo"
func = getattr(self.proxy, funcname)
for i in range(5):
try:
self.response = apply(func, args)
return
except Fault, msg:
raise CommunicationError, msg
except:
print "Transient communication error; retrying"
continue
(trace, val, trb) = exc_info()
print "Unexpected communication error after retry"
for line in extract_tb(trb):
print ' File "%s", line %i, in %s\n %s\n' % line
print "%s: %s\n" % (trace, val)
del trace, val, trb
raise CommunicationError, "no connect"
def RecvMessage(self, handle):
'''Return cached response'''
return self.response
def ClientClose(self, handle):
'''This is a noop for xmlrpc'''
pass
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