/usr/lib/python2.7/dist-packages/carbon/service.py is in graphite-carbon 1.0.2-1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 | """Copyright 2009 Chris Davis
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License."""
from os.path import exists
from twisted.application.service import MultiService
from twisted.application.internet import TCPServer, TCPClient
from twisted.internet.protocol import ServerFactory
from twisted.python.components import Componentized
from twisted.python.log import ILogObserver
# Attaching modules to the global state module simplifies import order hassles
from carbon import state, events, instrumentation, util
from carbon.exceptions import CarbonConfigException
from carbon.log import carbonLogObserver
from carbon.pipeline import Processor, run_pipeline, run_pipeline_generated
state.events = events
state.instrumentation = instrumentation
# Import plugins.
try:
import carbon.manhole
except ImportError:
pass
try:
import carbon.amqp_listener
except ImportError:
pass
try:
import carbon.protobuf
except ImportError, e:
pass
class CarbonRootService(MultiService):
"""Root Service that properly configures twistd logging"""
def setServiceParent(self, parent):
MultiService.setServiceParent(self, parent)
if isinstance(parent, Componentized):
parent.setComponent(ILogObserver, carbonLogObserver)
def createBaseService(config, settings):
root_service = CarbonRootService()
root_service.setName(settings.program)
if settings.USE_WHITELIST:
from carbon.regexlist import WhiteList, BlackList
WhiteList.read_from(settings.whitelist)
BlackList.read_from(settings.blacklist)
# 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
def setupPipeline(pipeline, root_service, settings):
state.pipeline_processors = []
for processor in pipeline:
args = []
if ':' in processor:
processor, arglist = processor.split(':', 1)
args = arglist.split(',')
if processor == 'aggregate':
setupAggregatorProcessor(root_service, settings)
elif processor == 'rewrite':
setupRewriterProcessor(root_service, settings)
elif processor == 'relay':
setupRelayProcessor(root_service, settings)
elif processor == 'write':
setupWriterProcessor(root_service, settings)
else:
raise ValueError("Invalid pipeline processor '%s'" % processor)
plugin_class = Processor.plugins[processor]
state.pipeline_processors.append(plugin_class(*args))
if processor == 'relay':
state.pipeline_processors_generated.append(plugin_class(*args))
events.metricReceived.addHandler(run_pipeline)
events.metricGenerated.addHandler(run_pipeline_generated)
def activate_processors():
for processor in state.pipeline_processors:
processor.pipeline_ready()
from twisted.internet import reactor
reactor.callWhenRunning(activate_processors)
def createCacheService(config):
from carbon.conf import settings
root_service = createBaseService(config, settings)
setupPipeline(['write'], root_service, settings)
setupReceivers(root_service, settings)
return root_service
def createAggregatorService(config):
from carbon.conf import settings
settings.RELAY_METHOD = 'consistent-hashing'
root_service = createBaseService(config, settings)
setupPipeline(['rewrite:pre', 'aggregate', 'rewrite:post', 'relay'], root_service, settings)
setupReceivers(root_service, settings)
return root_service
def createRelayService(config):
from carbon.conf import settings
root_service = createBaseService(config, settings)
setupPipeline(['relay'], root_service, settings)
setupReceivers(root_service, settings)
return root_service
def setupReceivers(root_service, settings):
from carbon.protocols import MetricReceiver
for plugin_name, plugin_class in MetricReceiver.plugins.items():
plugin_class.build(root_service)
def setupAggregatorProcessor(root_service, settings):
from carbon.aggregator.processor import AggregationProcessor # Register the plugin class
from carbon.aggregator.rules import RuleManager
aggregation_rules_path = settings["aggregation-rules"]
if not exists(aggregation_rules_path):
raise CarbonConfigException("aggregation processor: file does not exist {0}".format(aggregation_rules_path))
RuleManager.read_from(aggregation_rules_path)
def setupRewriterProcessor(root_service, settings):
from carbon.rewrite import RewriteRuleManager
rewrite_rules_path = settings["rewrite-rules"]
RewriteRuleManager.read_from(rewrite_rules_path)
def setupRelayProcessor(root_service, settings):
from carbon.routers import DatapointRouter
from carbon.client import CarbonClientManager
router_class = DatapointRouter.plugins[settings.RELAY_METHOD]
router = router_class(settings)
state.client_manager = CarbonClientManager(router)
state.client_manager.setServiceParent(root_service)
for destination in util.parseDestinations(settings.DESTINATIONS):
state.client_manager.startClient(destination)
def setupWriterProcessor(root_service, settings):
from carbon import cache # Register CacheFeedingProcessor
from carbon.protocols import CacheManagementHandler
from carbon.writer import WriterService
from carbon import events
factory = ServerFactory()
factory.protocol = CacheManagementHandler
service = TCPServer(
settings.CACHE_QUERY_PORT,
factory,
interface=settings.CACHE_QUERY_INTERFACE)
service.setServiceParent(root_service)
writer_service = WriterService()
writer_service.setServiceParent(root_service)
if settings.USE_FLOW_CONTROL:
events.cacheFull.addHandler(events.pauseReceivingMetrics)
events.cacheSpaceAvailable.addHandler(events.resumeReceivingMetrics)
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