class ConsistentHashingRouter(DatapointRouter):
plugin_name = 'consistent-hashing'
def __init__(self, settings):
replication_factor = settings.REPLICATION_FACTOR
diverse_replicas = settings.DIVERSE_REPLICAS
self.replication_factor = int(replication_factor)
self.diverse_replicas = diverse_replicas
self.instance_ports = {} # { (server, instance) : port }
self.ring = ConsistentHashRing([])
def addDestination(self, destination):
(server, port, instance) = destination
if (server, instance) in self.instance_ports:
raise Exception("destination instance (%s, %s) already configured" % (server, instance))
self.instance_ports[(server, instance)] = port
self.ring.add_node((server, instance))
def removeDestination(self, destination):
(server, port, instance) = destination
if (server, instance) not in self.instance_ports:
raise Exception("destination instance (%s, %s) not configured" % (server, instance))
del self.instance_ports[(server, instance)]
self.ring.remove_node((server, instance))
def getDestinations(self, metric):
key = self.getKey(metric)
if self.diverse_replicas:
used_servers = set()
for (server, instance) in self.ring.get_nodes(key):
if server in used_servers:
continue
else:
used_servers.add(server)
port = self.instance_ports[(server, instance)]
yield (server, port, instance)
if len(used_servers) >= self.replication_factor:
return
else:
for (count, node) in enumerate(self.ring.get_nodes(key)):
if count == self.replication_factor:
return
(server, instance) = node
port = self.instance_ports[(server, instance)]
yield (server, port, instance)
def getKey(self, metric):
return metric
def setKeyFunction(self, func):
self.getKey = func
def setKeyFunctionFromModule(self, keyfunc_spec):
module_path, func_name = keyfunc_spec.rsplit(':', 1)
module_file = open(module_path, 'U')
description = ('.py', 'U', imp.PY_SOURCE)
module = imp.load_module('keyfunc_module', module_file, module_path, description)
keyfunc = getattr(module, func_name)
self.setKeyFunction(keyfunc)
class ConsistentHashingRouter(DatapointRouter):
def __init__(self, replication_factor=1, diverse_replicas=False):
self.replication_factor = int(replication_factor)
self.diverse_replicas = diverse_replicas
self.instance_ports = {} # { (server, instance) : port }
self.ring = ConsistentHashRing([])
def addDestination(self, destination):
(server, port, instance) = destination
if (server, instance) in self.instance_ports:
raise Exception(
"destination instance (%s, %s) already configured" %
(server, instance))
self.instance_ports[(server, instance)] = port
self.ring.add_node((server, instance))
def removeDestination(self, destination):
(server, port, instance) = destination
if (server, instance) not in self.instance_ports:
raise Exception("destination instance (%s, %s) not configured" %
(server, instance))
del self.instance_ports[(server, instance)]
self.ring.remove_node((server, instance))
def getDestinations(self, metric):
key = self.getKey(metric)
if self.diverse_replicas:
used_servers = set()
for (server, instance) in self.ring.get_nodes(key):
if server in used_servers:
continue
else:
used_servers.add(server)
port = self.instance_ports[(server, instance)]
yield (server, port, instance)
if len(used_servers) >= self.replication_factor:
return
else:
for (count, node) in enumerate(self.ring.get_nodes(key)):
if count == self.replication_factor:
return
(server, instance) = node
port = self.instance_ports[(server, instance)]
yield (server, port, instance)
def getKey(self, metric):
return metric
def setKeyFunction(self, func):
self.getKey = func
def setKeyFunctionFromModule(self, keyfunc_spec):
module_path, func_name = keyfunc_spec.rsplit(':', 1)
module_file = open(module_path, 'U')
description = ('.py', 'U', imp.PY_SOURCE)
module = imp.load_module('keyfunc_module', module_file, module_path,
description)
keyfunc = getattr(module, func_name)
self.setKeyFunction(keyfunc)
class ConsistentHashingRouter(DatapointRouter):
def __init__(self, replication_factor=1):
self.replication_factor = int(replication_factor)
self.instance_ports = {} # { (server, instance) : port }
self.ring = ConsistentHashRing([])
def addDestination(self, destination):
(server, port, instance) = destination
if (server, instance) in self.instance_ports:
raise Exception("destination instance (%s, %s) already configured" % (server, instance))
self.instance_ports[(server, instance)] = port
self.ring.add_node((server, instance))
def removeDestination(self, destination):
(server, port, instance) = destination
if (server, instance) not in self.instance_ports:
raise Exception("destination instance (%s, %s) not configured" % (server, instance))
del self.instance_ports[(server, instance)]
self.ring.remove_node((server, instance))
def getDestinations(self, metric):
key = self.getKey(metric)
used_servers = set()
for (server, instance) in self.ring.get_nodes(key):
if server in used_servers:
continue
else:
used_servers.add(server)
port = self.instance_ports[(server, instance)]
yield (server, port, instance)
if len(used_servers) >= self.replication_factor:
return
def getKey(self, metric):
return metric
def setKeyFunction(self, func):
self.getKey = func
def setKeyFunctionFromModule(self, keyfunc_spec):
module_path, func_name = keyfunc_spec.rsplit(":", 1)
module_file = open(module_path, "U")
description = (".py", "U", imp.PY_SOURCE)
module = imp.load_module("keyfunc_module", module_file, module_path, description)
keyfunc = getattr(module, func_name)
self.setKeyFunction(keyfunc)
class ConsistentHashingRouter(DatapointRouter):
def __init__(self, replication_factor=1):
self.replication_factor = int(replication_factor)
self.instance_ports = {} # { (server, instance) : port }
self.ring = ConsistentHashRing([])
def addDestination(self, destination):
(server, port, instance) = destination
if (server, instance) in self.instance_ports:
raise Exception("destination instance (%s, %s) already configured" % (server, instance))
self.instance_ports[ (server, instance) ] = port
self.ring.add_node( (server, instance) )
def removeDestination(self, destination):
(server, port, instance) = destination
if (server, instance) not in self.instance_ports:
raise Exception("destination instance (%s, %s) not configured" % (server, instance))
del self.instance_ports[ (server, instance) ]
self.ring.remove_node( (server, instance) )
def getDestinations(self, metric):
key = self.getKey(metric)
for count,node in enumerate(self.ring.get_nodes(key)):
if count == self.replication_factor:
return
(server, instance) = node
port = self.instance_ports[ (server, instance) ]
yield (server, port, instance)
#def getKey(self, metric):
# return metric
def getKey(self, metric):
#RBA: modification done to ensure that all the metrics to be aggregated are processed by the same aggregator
return metric.rsplit('.',1)[0]
def setKeyFunction(self, func):
self.getKey = func
def setKeyFunctionFromModule(self, keyfunc_spec):
module_path, func_name = keyfunc_spec.rsplit(':', 1)
module_file = open(module_path, 'U')
description = ('.py', 'U', imp.PY_SOURCE)
module = imp.load_module('keyfunc_module', module_file, module_path, description)
keyfunc = getattr(module, func_name)
self.setKeyFunction(keyfunc)
class ConsistentHashingRouter(DatapointRouter):
plugin_name = 'consistent-hashing'
def __init__(self, settings):
replication_factor = settings.REPLICATION_FACTOR
diverse_replicas = settings.DIVERSE_REPLICAS
self.replication_factor = int(replication_factor)
self.diverse_replicas = diverse_replicas
self.instance_ports = {} # { (server, instance) : port }
hash_type = settings.ROUTER_HASH_TYPE or 'carbon_ch'
self.ring = ConsistentHashRing([], hash_type=hash_type)
def addDestination(self, destination):
(server, port, instance) = destination
if self.hasDestination(destination):
raise Exception("destination instance (%s, %s) already configured" % (server, instance))
self.instance_ports[(server, instance)] = port
self.ring.add_node((server, instance))
def removeDestination(self, destination):
(server, port, instance) = destination
if not self.hasDestination(destination):
raise Exception("destination instance (%s, %s) not configured" % (server, instance))
del self.instance_ports[(server, instance)]
self.ring.remove_node((server, instance))
def hasDestination(self, destination):
(server, _, instance) = destination
return (server, instance) in self.instance_ports
def countDestinations(self):
return len(self.instance_ports)
def getDestinations(self, metric):
key = self.getKey(metric)
if self.diverse_replicas:
used_servers = set()
for (server, instance) in self.ring.get_nodes(key):
if server in used_servers:
continue
else:
used_servers.add(server)
port = self.instance_ports[(server, instance)]
yield (server, port, instance)
if len(used_servers) >= self.replication_factor:
return
else:
for (count, node) in enumerate(self.ring.get_nodes(key)):
if count == self.replication_factor:
return
(server, instance) = node
port = self.instance_ports[(server, instance)]
yield (server, port, instance)
def getKey(self, metric):
return metric
def setKeyFunction(self, func):
self.getKey = func
def setKeyFunctionFromModule(self, keyfunc_spec):
module_path, func_name = keyfunc_spec.rsplit(':', 1)
module_file = open(module_path, 'U')
description = ('.py', 'U', imp.PY_SOURCE)
module = imp.load_module('keyfunc_module', module_file, module_path, description)
keyfunc = getattr(module, func_name)
self.setKeyFunction(keyfunc)
