def createCacheService(config):
from carbon.cache import MetricCache
from carbon.conf import settings
from carbon.events import metricReceived
from carbon.protocols import protocolManager
from carbon.protocols import CacheQueryHandler
# Configure application components
metricReceived.installHandler(MetricCache.store)
root_service = createBaseService(config)
factory = protocolManager.createFactory(CacheQueryHandler)
service = TCPServer(int(settings.CACHE_QUERY_PORT), factory,
interface=settings.CACHE_QUERY_INTERFACE)
service.setServiceParent(root_service)
# have to import this *after* settings are defined
from carbon.writer import WriterService
service = WriterService()
service.setServiceParent(root_service)
return root_service
def createBaseService(config):
import carbon.instrumentation # fulfill import deps to avoid circularities
from carbon.conf import settings
from carbon.protocols import protocolManager
from carbon.protocols import (MetricLineReceiver, MetricPickleReceiver,
MetricDatagramReceiver)
root_service = MultiService()
root_service.setName(settings.program)
use_amqp = settings.get("ENABLE_AMQP", False)
if use_amqp:
from carbon import amqp_listener
amqp_host = settings.get("AMQP_HOST", "localhost")
amqp_port = settings.get("AMQP_PORT", 5672)
amqp_user = settings.get("AMQP_USER", "guest")
amqp_password = settings.get("AMQP_PASSWORD", "guest")
amqp_verbose = settings.get("AMQP_VERBOSE", False)
amqp_vhost = settings.get("AMQP_VHOST", "/")
amqp_spec = settings.get("AMQP_SPEC", None)
amqp_exchange_name = settings.get("AMQP_EXCHANGE", "graphite")
for interface, port, protocol in ((settings.LINE_RECEIVER_INTERFACE,
settings.LINE_RECEIVER_PORT,
MetricLineReceiver),
(settings.PICKLE_RECEIVER_INTERFACE,
settings.PICKLE_RECEIVER_PORT,
MetricPickleReceiver)):
if port:
factory = protocolManager.createFactory(protocol)
service = TCPServer(int(port), factory, interface=interface)
service.setServiceParent(root_service)
if settings.ENABLE_UDP_LISTENER:
service = UDPServer(int(settings.UDP_RECEIVER_PORT),
MetricDatagramReceiver(),
interface=settings.UDP_RECEIVER_INTERFACE)
service.setServiceParent(root_service)
if use_amqp:
factory = amqp_listener.createAMQPListener(
amqp_user, amqp_password,
vhost=amqp_vhost, spec=amqp_spec,
exchange_name=amqp_exchange_name,
verbose=amqp_verbose)
service = TCPClient(amqp_host, int(amqp_port), factory)
service.setServiceParent(root_service)
if settings.ENABLE_MANHOLE:
from carbon import manhole
factory = manhole.createManholeListener()
service = TCPServer(int(settings.MANHOLE_PORT), factory,
interface=settings.MANHOLE_INTERFACE)
service.setServiceParent(root_service)
# Instantiate an instrumentation service that will record metrics about
# this service.
from carbon.instrumentation import InstrumentationService
service = InstrumentationService()
service.setServiceParent(root_service)
return root_service
