def get_connection(self, host):
# First try to take one out of the pool for this host
(server, instance) = host
port = self.ports[host]
connectionPool = self.connections[host]
try:
return connectionPool.pop()
except KeyError:
pass #nothing left in the pool, gotta make a new connection
log.cache("CarbonLink creating a new socket for %s" % str(host))
connection = socket.socket()
connection.settimeout(self.timeout)
try:
connection.connect( (server, port) )
except:
self.last_failure[host] = time.time()
raise
else:
connection.setsockopt( socket.SOL_SOCKET, socket.SO_KEEPALIVE, 1 )
return connection
def set_metadata(self, metric, key, value):
request = dict(type='set-metadata', metric=metric, key=key, value=value)
results = self.send_request(request)
log.cache("CarbonLink set-metadata request received for %s:%s" % (metric, key))
return results
def query(self, metric):
request = dict(type='cache-query', metric=metric)
results = self.send_request(request)
log.cache("CarbonLink cache-query request for %s returned %d datapoints" % (metric, len(results)))
return results
