def __init__(self, server, size, connect_timeout):
Pool.__init__(self, max_size=size)
self.server = server
self._connect_timeout = connect_timeout
self._parent_class_getter = super(MemcacheConnPool, self).get
try:
# call the patched .get() if eventlet is older than 0.9.17
if StrictVersion(eventlet_version) < StrictVersion('0.9.17'):
self._parent_class_getter = self._upstream_fixed_get
except ValueError:
# "invalid" version number or otherwise error parsing version
pass
def __init__(self, server, size, connect_timeout):
Pool.__init__(self, max_size=size)
self.server = server
self._connect_timeout = connect_timeout
self._parent_class_getter = super(MemcacheConnPool, self).get
try:
# call the patched .get() if eventlet is older than 0.9.17
if StrictVersion(eventlet_version) < StrictVersion('0.9.17'):
self._parent_class_getter = self._upstream_fixed_get
except ValueError:
# "invalid" version number or otherwise error parsing version
pass
def _setup_dbs(self):
for db in 'zodb', 'zodb_session':
options = copy.deepcopy(self.options.__dict__)
options['zodb_db'] = db
connectionFactory = getUtility(IZodbFactoryLookup).get()
self._dbs[db], _ = connectionFactory.getConnection(**options)
self._pool = Pool(create=self._create, max_size=20)
def __init__(self, host='localhost', port=8125, ipv6=False, prefix=None,
maxudpsize=512):
"""Create a new client."""
fam = socket.AF_INET6 if ipv6 else socket.AF_INET
family, _, _, _, addr = socket.getaddrinfo(host, port, fam, socket.SOCK_DGRAM)[0]
self._addr = addr
self._pool = Pool(max_size=100, min_size=0, create=lambda: socket.socket(family, socket.SOCK_DGRAM))
self._prefix = prefix
self._maxudpsize = maxudpsize
def put(self, connection):
if self.current_size > self.max_size:
self.current_size -= 1
# close the connection if needed
if connection.sock is not None:
connection.close()
return
try:
response = connection.getresponse()
response.close()
except httplib.ResponseNotReady:
pass
except:
connection.close()
connection = self.create()
if connection.sock is None:
connection = self.create()
Pool.put(self, connection)
def __init__(
self, controllercls, connection_factory, exchange, topic,
pool=None, poolsize=1000):
self.nodeid = UIDGEN()
self.max_workers = poolsize
if pool is None:
self.procpool = GreenPool(size=poolsize)
else:
self.procpool = pool
self.controller = controllercls()
self.service = self.controller
self.topic = topic
self.greenlet = None
self.consume_ready = Event()
node_topic = "{}.{}".format(self.topic, self.nodeid)
self.nova_queues = [
entities.get_topic_queue(exchange, topic),
entities.get_topic_queue(exchange, node_topic),
entities.get_fanout_queue(topic), ]
self._channel = None
self._consumers = None
self.connection = connection_factory()
self.connection_factory = connection_factory
inject_dependencies(self.controller, self)
self._connection_pool = Pool(
max_size=self.procpool.size,
create=connection_factory
)
self.workers = set()
self._pending_ack_messages = []
self._pending_requeue_messages = []
self._do_cancel_consumers = False
self._consumers_cancelled = Event()
self._timers = list(get_timers(self.controller))
class ConnectionPool(Pool):
"""A pool which gives out saranwrapped MySQLdb connections from a pool
"""
def __init__(self, min_size=0, max_size=4, *args, **kwargs):
self._args = args
self._kwargs = kwargs
Pool.__init__(self, min_size, max_size)
def create(self):
return saranwrap.wrap(MySQLdb).connect(*self._args, **self._kwargs)
def put(self, conn):
# rollback any uncommitted changes, so that the next process
# has a clean slate. This also pokes the process to see if
# it's dead or None
try:
conn.rollback()
except (AttributeError, DeadProcess), e:
conn = self.create()
# TODO figure out if we're still connected to the database
if conn is not None:
Pool.put(self, conn)
else:
self.current_size -= 1
class StatsClient(StatsClientBase):
"""A client for statsd."""
def __init__(self, host='localhost', port=8125, ipv6=False, prefix=None,
maxudpsize=512):
"""Create a new client."""
fam = socket.AF_INET6 if ipv6 else socket.AF_INET
family, _, _, _, addr = socket.getaddrinfo(host, port, fam, socket.SOCK_DGRAM)[0]
self._addr = addr
self._pool = Pool(max_size=100, min_size=0, create=lambda: socket.socket(family, socket.SOCK_DGRAM))
self._prefix = prefix
self._maxudpsize = maxudpsize
def _send(self, data):
"""Send data to statsd."""
try:
with self._pool.item() as _sock:
_sock.sendto(data.encode('ascii'), self._addr)
except socket.error:
# No time for love, Dr. Jones!
pass
def pipeline(self):
return Pipeline(self)
def generate_report(conf, policy_name=None):
global json_output
json_output = config_true_value(conf.get('dump_json', 'no'))
if policy_name is None:
policy = POLICIES.default
else:
policy = POLICIES.get_by_name(policy_name)
if policy is None:
exit('Unable to find policy: %s' % policy_name)
if not json_output:
print('Using storage policy: %s ' % policy.name)
swift_dir = conf.get('swift_dir', '/etc/swift')
retries = int(conf.get('retries', 5))
concurrency = int(conf.get('concurrency', 25))
endpoint_type = str(conf.get('endpoint_type', 'publicURL'))
region_name = str(conf.get('region_name', ''))
container_report = config_true_value(conf.get('container_report', 'yes'))
object_report = config_true_value(conf.get('object_report', 'yes'))
if not (object_report or container_report):
exit("Neither container or object report is set to run")
user_domain_name = str(conf.get('user_domain_name', ''))
project_domain_name = str(conf.get('project_domain_name', ''))
project_name = str(conf.get('project_name', ''))
insecure = config_true_value(conf.get('keystone_api_insecure', 'no'))
coropool = GreenPool(size=concurrency)
os_options = {'endpoint_type': endpoint_type}
if user_domain_name:
os_options['user_domain_name'] = user_domain_name
if project_domain_name:
os_options['project_domain_name'] = project_domain_name
if project_name:
os_options['project_name'] = project_name
if region_name:
os_options['region_name'] = region_name
url, token = get_auth(conf['auth_url'], conf['auth_user'],
conf['auth_key'],
auth_version=conf.get('auth_version', '1.0'),
os_options=os_options,
insecure=insecure)
account = url.rsplit('/', 1)[1]
connpool = Pool(max_size=concurrency)
connpool.create = lambda: SimpleClient(
url=url, token=token, retries=retries)
container_ring = Ring(swift_dir, ring_name='container')
object_ring = Ring(swift_dir, ring_name=policy.ring_name)
output = {}
if container_report:
output['container'] = container_dispersion_report(
coropool, connpool, account, container_ring, retries,
conf.get('partitions'), policy)
if object_report:
output['object'] = object_dispersion_report(
coropool, connpool, account, object_ring, retries,
conf.get('partitions'), policy)
return output
class RemoteProcedureCall(object):
def __init__(self):
alarm_rpc_connection = lambda : RpcConnection(True)
self.metric_pool = Pool(create=RpcConnection, max_size=500)
self.alarm_pool = Pool(create=alarm_rpc_connection, max_size=20)
def read_msg(self):
msg = 'AMQP Connection is closed %d time(s)... retrying.'
max_retries = 5
with self.metric_pool.item() as conn:
for i in range(max_retries + 1):
try:
frame, header, body = conn.channel.basic_get(
queue='metric_queue')
if frame:
conn.channel.basic_ack(delivery_tag=frame.delivery_tag)
return frame, body
except (AMQPConnectionError, AMQPChannelError,
ConnectionClosed):
if i < max_retries:
conn.connect()
LOG.warn(_(msg) % i)
time.sleep(2 * i)
else:
raise
def send_msg(self, message_id, body):
"""
Args:
message_id: int
ex) PUT_METRIC_DATA_MSG_ID (0x0001)
PUT_METRIC_ALARM_MSG_ID (0x0002)
...
body: dict object (will be converted into json format)
"""
def publish(body, properties, use_metric_pool=True):
msg = 'AMQP Connection is closed %d time(s)... retrying.'
max_retries = 5
mq_pool = self.metric_pool if use_metric_pool else self.alarm_pool
with mq_pool.item() as conn:
for i in range(max_retries + 1):
try:
return conn.channel.basic_publish(exchange='',
routing_key='metric_queue',
body=body, properties=properties)
except ConnectionClosed:
if i < max_retries:
conn.connect()
LOG.warn(_(msg) % i)
time.sleep(2 * i)
else:
raise
if type(message_id) is not int:
raise RpcInvokeException()
message_uuid = str(uuid.uuid4())
body.setdefault('message_id', message_id)
body.setdefault('message_uuid', message_uuid)
properties=pika.BasicProperties(delivery_mode=2)
use_metric_pool = (message_id == PUT_METRIC_DATA_MSG_ID)
publish(json.dumps(body), properties, use_metric_pool)
LOG.info(_("send_msg - id(%03d), %s"), message_id, message_uuid)
LOG.debug(_("send_msg - body(%s)"), str(body))
def __init__(self):
alarm_rpc_connection = lambda : RpcConnection(True)
self.metric_pool = Pool(create=RpcConnection, max_size=500)
self.alarm_pool = Pool(create=alarm_rpc_connection, max_size=20)
class ZAuthServer(CmdBase):
_dbs = {}
_pool = None
def _create(self):
_tm = TransactionManager()
return DBConnectionContainer(self._dbs['zodb'],
self._dbs['zodb_session'],_tm)
def _setup_dbs(self):
for db in 'zodb', 'zodb_session':
options = copy.deepcopy(self.options.__dict__)
options['zodb_db'] = db
connectionFactory = getUtility(IZodbFactoryLookup).get()
self._dbs[db], _ = connectionFactory.getConnection(**options)
self._pool = Pool(create=self._create, max_size=20)
@property
@contextmanager
def db(self):
"""
Use this context manager exclusively for database access. It manages
checking DBConnectionContainers out from the pool, wrapping them in
a tpool Proxy, and cleaning up transactions afterward.
"""
with self._pool.item() as conns:
proxied = tpool.Proxy(conns)
yield proxied
proxied.abort()
def run(self, host, port):
self._setup_dbs()
wsgi.server(eventlet.listen((host, port)), self.route)
def _unauthorized(self, msg, start_response):
start_response('401 Unauthorized', [('Content-Type', 'text/html')])
return msg
def _challenge(self, start_response):
body = 'Please authenticate'
headers = [
('content-type', 'text/plain'),
('content-length', str(len(body))),
('WWW-Authenticate', 'Basic realm="%s"' % "ZAuthRealm")]
start_response('401 Unauthorized', headers)
return [body]
def handleLogin(self, env, start_response):
basic = env.get('HTTP_AUTHORIZATION', None)
if basic is None:
return self._challenge(start_response)
response = WSGIResponse()
request = HTTPRequest(env['wsgi.input'], env, response)
with self.db as db:
db.sync()
authorization = IAuthorizationTool(db.dmd())
credentials = authorization.extractCredentials(request)
login = credentials.get('login', None)
password = credentials.get('password', None)
# no credentials to test authentication
if login is None or password is None:
return self._unauthorized("Missing Authentication Credentials", start_response)
# test authentication
if not authorization.authenticateCredentials(login, password):
return self._unauthorized( "Failed Authentication", start_response)
# create the session data
with self.db as db:
db.sync()
db.browser_id_manager().REQUEST = request
tokenId = db.browser_id_manager().getBrowserId(create=1)
expires = time.time() + 60 * 20
token = dict(id=tokenId, expires=expires)
with self.db as db:
db.sync()
session = db.session_data()
if session.get(tokenId) is None:
session[tokenId] = token
db.commit()
start_response('200 OK', [('Content-Type', 'text/html')])
return json.dumps(token)
def handleValidate(self, env, start_response):
queryString = env.get('QUERY_STRING')
if not queryString:
return self._unauthorized("Missing Token Id", start_response)
tokenId = queryString.replace('id=', '')
if tokenId is None:
return self._unauthorized("Missing Token Id", start_response)
token = None
expired = False
with self.db as db:
db.sync()
token = db.session_data().get(tokenId)
if token is None:
return self._unauthorized("Unable to find token %s " % tokenId, start_response)
expired = time.time() >= token['expires']
if expired:
return self._unauthorized("Token Expired", start_response)
start_response('200 OK', [('Content-Type', 'text/html')])
return json.dumps(token)
def route(self, env, start_response):
path = env['PATH_INFO']
if path == '/authorization/login':
result = self.handleLogin(env, start_response)
return result
elif path == '/authorization/validate':
return self.handleValidate(env, start_response)
elif path =='/':
return self.index(env, start_response)
else:
start_response('404 OK', [('Content-Type', 'text/html')])
return ""
def index(self, env, start_response):
start_response('200 OK', [('Content-Type', 'text/html')])
return """
<html>
<head>
<title>ZAuthService</title>
</head>
<body>
<h1>Menu</h1>
<ul>
<li><a href="/authorization/login">Login</a></li>
<li><a href="/authorization/validate">Validate</a></li>
</ul>
</body>
</html>
"""
def buildOptions(self):
CmdBase.buildOptions(self)
connectionFactory = getUtility(IZodbFactoryLookup).get()
connectionFactory.buildOptions(self.parser)
def __init__(self, mocks):
Pool.__init__(self, max_size=2)
self.mocks = mocks
def __init__(self, min_size = 0, max_size = 4, *args, **kwargs):
self._args = args
self._kwargs = kwargs
Pool.__init__(self, min_size, max_size)
class RemoteProcedureCall(object):
def __init__(self):
alarm_rpc_connection = lambda: RpcConnection(True)
self.metric_pool = Pool(create=RpcConnection, max_size=500)
self.alarm_pool = Pool(create=alarm_rpc_connection, max_size=20)
def read_msg(self):
msg = 'AMQP Connection is closed %d time(s)... retrying.'
max_retries = 5
with self.metric_pool.item() as conn:
for i in range(max_retries + 1):
try:
frame, header, body = conn.channel.basic_get(
queue='metric_queue')
if frame:
conn.channel.basic_ack(delivery_tag=frame.delivery_tag)
return frame, body
except (AMQPConnectionError, AMQPChannelError,
ConnectionClosed):
if i < max_retries:
conn.connect()
LOG.warn(_(msg) % i)
time.sleep(2 * i)
else:
raise
def send_msg(self, message_id, body):
"""
Args:
message_id: int
ex) PUT_METRIC_DATA_MSG_ID (0x0001)
PUT_METRIC_ALARM_MSG_ID (0x0002)
...
body: dict object (will be converted into json format)
"""
def publish(body, properties, use_metric_pool=True):
msg = 'AMQP Connection is closed %d time(s)... retrying.'
max_retries = 5
mq_pool = self.metric_pool if use_metric_pool else self.alarm_pool
with mq_pool.item() as conn:
for i in range(max_retries + 1):
try:
return conn.channel.basic_publish(
exchange='',
routing_key='metric_queue',
body=body,
properties=properties)
except ConnectionClosed:
if i < max_retries:
conn.connect()
LOG.warn(_(msg) % i)
time.sleep(2 * i)
else:
raise
if type(message_id) is not int:
raise RpcInvokeException()
message_uuid = str(uuid.uuid4())
body.setdefault('message_id', message_id)
body.setdefault('message_uuid', message_uuid)
properties = pika.BasicProperties(delivery_mode=2)
use_metric_pool = (message_id == PUT_METRIC_DATA_MSG_ID)
publish(json.dumps(body), properties, use_metric_pool)
LOG.info(_("send_msg - id(%03d), %s"), message_id, message_uuid)
LOG.debug(_("send_msg - body(%s)"), str(body))
def __init__(self, server, size, connect_timeout):
Pool.__init__(self, max_size=size)
self.host, self.port = utils.parse_socket_string(
server, DEFAULT_MEMCACHED_PORT)
self._connect_timeout = connect_timeout
def get(self):
fp, sock = Pool.get(self)
if fp is None:
# An error happened previously, so we need a new connection
fp, sock = self.create()
return fp, sock
def __init__(self, server, size, connect_timeout):
Pool.__init__(self, max_size=size)
self.host, self.port = utils.parse_socket_string(
server, DEFAULT_MEMCACHED_PORT)
self._connect_timeout = connect_timeout
def __init__(self, uri, use_proxy=False, min_size=0, max_size=4):
self.uri = uri
self.use_proxy = use_proxy
Pool.__init__(self, min_size, max_size)
def __init__(self):
alarm_rpc_connection = lambda: RpcConnection(True)
self.metric_pool = Pool(create=RpcConnection, max_size=500)
self.alarm_pool = Pool(create=alarm_rpc_connection, max_size=20)
try:
import yajl as json
except ImportError:
import json
import socket
from urllib import urlencode
from heroshi import get_logger
log = get_logger("api")
from heroshi.conf import settings
from heroshi.error import ApiError
manager_connections = Pool(max_size=2)
manager_connections.create = lambda: httplib2.Http(timeout=20)
def request_manager(resource, method, data=None, headers=None):
use_headers = {
'User-Agent': settings.identity['user_agent'],
'X-Heroshi-Auth': settings.api_key,
'Expect': '', # a try to fix result: 100 not-ok problem
}
if headers is not None:
use_headers.update(headers)
# concat URIs carefully
base_url = settings.manager_url
url = base_url.strip('/') + resource
def __init__(self, min_size=0, max_size=4, *args, **kwargs):
self._args = args
self._kwargs = kwargs
Pool.__init__(self, min_size, max_size)
Given a pool, handle item management (like stale items in the pool)
while passing other errors to the calling method.
"""
i = pool.get()
try:
yield i
except StaleConnectionError, err:
print err
else:
print i(), 'returned to pool'
pool.put(i)
if __name__ == '__main__':
pool_size = 5
p = Pool(min_size=1, max_size=pool_size, create=new_connection)
attempts = 1
max_attempts = 5
stale = True
while attempts < max_attempts:
with PoolManager(p) as i:
try:
attempts += 1
print 'starting attempt %s' % attempts
print i()
print i(stale=stale)
#print i(err=True)
except ProcessingError, err:
print err, 'as expected'
else:
break
def __init__(self, server, size, connect_timeout):
Pool.__init__(self, max_size=size)
self.server = server
self._connect_timeout = connect_timeout
def __init__(self, mocks):
Pool.__init__(self, max_size=2)
self.mocks = mocks
def __init__(self, mocks):
Pool.__init__(self, max_size=2)
self.mocks = mocks
# setting this for the eventlet workaround in the MemcacheConnPool
self._parent_class_getter = super(memcached.MemcacheConnPool, self).get
def generate_report(conf, policy_name=None):
global json_output
json_output = config_true_value(conf.get('dump_json', 'no'))
if policy_name is None:
policy = POLICIES.default
else:
policy = POLICIES.get_by_name(policy_name)
if policy is None:
exit('Unable to find policy: %s' % policy_name)
if not json_output:
print('Using storage policy: %s ' % policy.name)
swift_dir = conf.get('swift_dir', '/etc/swift')
retries = int(conf.get('retries', 5))
concurrency = int(conf.get('concurrency', 25))
endpoint_type = str(conf.get('endpoint_type', 'publicURL'))
region_name = str(conf.get('region_name', ''))
container_report = config_true_value(conf.get('container_report', 'yes'))
object_report = config_true_value(conf.get('object_report', 'yes'))
if not (object_report or container_report):
exit("Neither container or object report is set to run")
user_domain_name = str(conf.get('user_domain_name', ''))
project_domain_name = str(conf.get('project_domain_name', ''))
project_name = str(conf.get('project_name', ''))
insecure = config_true_value(conf.get('keystone_api_insecure', 'no'))
coropool = GreenPool(size=concurrency)
os_options = {'endpoint_type': endpoint_type}
if user_domain_name:
os_options['user_domain_name'] = user_domain_name
if project_domain_name:
os_options['project_domain_name'] = project_domain_name
if project_name:
os_options['project_name'] = project_name
if region_name:
os_options['region_name'] = region_name
url, token = get_auth(conf['auth_url'],
conf['auth_user'],
conf['auth_key'],
auth_version=conf.get('auth_version', '1.0'),
os_options=os_options,
insecure=insecure)
account = url.rsplit('/', 1)[1]
connpool = Pool(max_size=concurrency)
connpool.create = lambda: SimpleClient(
url=url, token=token, retries=retries)
container_ring = Ring(swift_dir, ring_name='container')
object_ring = Ring(swift_dir, ring_name=policy.ring_name)
output = {}
if container_report:
output['container'] = container_dispersion_report(
coropool, connpool, account, container_ring, retries,
conf.get('partitions'), policy)
if object_report:
output['object'] = object_dispersion_report(coropool, connpool,
account, object_ring,
retries,
conf.get('partitions'),
policy)
return output
def __init__(self, mocks):
Pool.__init__(self, max_size=2)
self.mocks = mocks
# setting this for the eventlet workaround in the MemcacheConnPool
self._parent_class_getter = super(memcached.MemcacheConnPool, self).get
class Service(ConsumerMixin):
def __init__(
self, controllercls, connection_factory, exchange, topic,
pool=None, poolsize=1000):
self.nodeid = UIDGEN()
self.max_workers = poolsize
if pool is None:
self.procpool = GreenPool(size=poolsize)
else:
self.procpool = pool
self.controller = controllercls()
self.service = self.controller
self.topic = topic
self.greenlet = None
self.consume_ready = Event()
node_topic = "{}.{}".format(self.topic, self.nodeid)
self.nova_queues = [
entities.get_topic_queue(exchange, topic),
entities.get_topic_queue(exchange, node_topic),
entities.get_fanout_queue(topic), ]
self._channel = None
self._consumers = None
self.connection = connection_factory()
self.connection_factory = connection_factory
inject_dependencies(self.controller, self)
self._connection_pool = Pool(
max_size=self.procpool.size,
create=connection_factory
)
self.workers = set()
self._pending_ack_messages = []
self._pending_requeue_messages = []
self._do_cancel_consumers = False
self._consumers_cancelled = Event()
self._timers = list(get_timers(self.controller))
def start(self):
self.start_timers()
# greenlet has a magic attribute ``dead`` - pylint: disable=E1101
if self.greenlet is not None and not self.greenlet.dead:
raise RuntimeError()
self.greenlet = eventlet.spawn(self.run)
def start_timers(self):
for timer in self._timers:
timer.start()
def get_consumers(self, Consumer, channel):
nova_consumer = Consumer(
self.nova_queues, callbacks=[self.on_nova_message, ])
consume_consumers = get_consumers(
Consumer, self, self.on_consume_message)
consumers = [nova_consumer] + list(consume_consumers)
prefetch_count = self.procpool.size
for consumer in consumers:
consumer.qos(prefetch_count=prefetch_count)
return consumers
def on_consume_ready(self, connection, channel, consumers, **kwargs):
self._consumers = consumers
self._channel = channel
self.consume_ready.send(None)
def on_consume_end(self, connection, channel):
self.consume_ready.reset()
def on_nova_message(self, body, message):
_log.debug('spawning RPC worker (%d free)', self.procpool.free())
gt = self.procpool.spawn(self.handle_rpc_message, body)
gt.link(self.handle_rpc_message_processed, message)
self.workers.add(gt)
def on_consume_message(self, consumer_method_config, body, message):
_log.debug('spawning consume worker (%d free)', self.procpool.free())
gt = self.procpool.spawn(
self.handle_consume_message, consumer_method_config, body, message)
gt.link(self.handle_consume_message_processed)
self.workers.add(gt)
def handle_rpc_message(self, body):
# item is patched on for python with ``with``, pylint can't find it
# pylint: disable=E1102
with self._connection_pool.item() as connection:
process_rpc_message(connection, self.controller, body)
def handle_rpc_message_processed(self, gt, message):
self.workers.discard(gt)
self._pending_ack_messages.append(message)
def handle_consume_message(self, consumer_method_config, body, message):
with log_time(_log.debug, 'processed consume message in %0.3fsec'):
consumer_method, consumer_config = consumer_method_config
try:
consumer_method(body)
except Exception as e:
if consumer_config.requeue_on_error:
_log.exception(
'failed to consume message, requeueing message: '
'%s(): %s', consumer_method, e)
self._pending_requeue_messages.append(message)
else:
_log.exception(
'failed to consume message, ignoring message: '
'%s(): %s', consumer_method, e)
self._pending_ack_messages.append(message)
else:
self._pending_ack_messages.append(message)
def handle_consume_message_processed(self, gt):
self.workers.discard(gt)
def on_iteration(self):
self.process_consumer_cancellation()
# we need to make sure we process any pending messages before shutdown
self.process_pending_message_acks()
self.process_shutdown()
def process_consumer_cancellation(self):
if self._do_cancel_consumers:
self._do_cancel_consumers = False
if self._consumers:
_log.debug('cancelling consumers')
for consumer in self._consumers:
consumer.cancel()
self._consumers_cancelled.send(True)
def process_pending_message_acks(self):
messages = self._pending_ack_messages
if messages:
_log.debug('ack() %d processed messages', len(messages))
while messages:
msg = messages.pop()
msg.ack()
eventlet.sleep()
messages = self._pending_requeue_messages
if messages:
_log.debug('requeue() %d processed messages', len(messages))
while messages:
msg = messages.pop()
msg.requeue()
eventlet.sleep()
def consume(self, limit=None, timeout=None, safety_interval=0.1, **kwargs):
""" Lifted from kombu so we are able to break the loop immediately
after a shutdown is triggered rather than waiting for the timeout.
"""
elapsed = 0
with self.Consumer() as (connection, channel, consumers):
with self.extra_context(connection, channel):
self.on_consume_ready(connection, channel, consumers, **kwargs)
for i in limit and xrange(limit) or count():
# moved from after the following `should_stop` condition to
# avoid waiting on a drain_events timeout before breaking
# the loop.
self.on_iteration()
if self.should_stop:
break
try:
connection.drain_events(timeout=safety_interval)
except socket.timeout:
elapsed += safety_interval
# Excluding the following clause from coverage,
# as timeout never appears to be set - This method
# is a lift from kombu so will leave in place for now.
if timeout and elapsed >= timeout: # pragma: no cover
raise socket.timeout()
except socket.error:
if not self.should_stop:
raise
else:
yield
elapsed = 0
def process_shutdown(self):
consumers_cancelled = self._consumers_cancelled.ready()
no_active_timers = (len(self._timers) == 0)
no_active_workers = (self.procpool.running() < 1)
no_pending_message_acks = not (
self._pending_ack_messages or
self._pending_requeue_messages
)
ready_to_stop = (
consumers_cancelled and
no_active_timers and
no_active_workers and
no_pending_message_acks
)
if ready_to_stop:
_log.debug('notifying service to stop')
self.should_stop = True
def cancel_consumers(self):
# greenlet has a magic attribute ``dead`` - pylint: disable=E1101
if self.greenlet is not None and not self.greenlet.dead:
# since consumers were started in a separate thread,
# we will just notify the thread to avoid getting
# "Second simultaneous read" errors
_log.debug('notifying consumers to be cancelled')
self._do_cancel_consumers = True
self._consumers_cancelled.wait()
else:
_log.debug('consumer thread already dead')
def cancel_timers(self):
if self._timers:
_log.debug('stopping %d timers', len(self._timers))
while self._timers:
self._timers.pop().stop()
def kill_workers(self):
_log.debug('force killing %d workers', len(self.workers))
while self.workers:
self.workers.pop().kill()
def wait_for_workers(self):
pool = self.procpool
_log.debug('waiting for %d workers to complete', pool.running())
pool.waitall()
def shut_down(self):
# greenlet has a magic attribute ``dead`` - pylint: disable=E1101
if self.greenlet is not None and not self.greenlet.dead:
_log.debug('stopping service')
self.greenlet.wait()
# TODO: when is this ever not None?
if self._channel is not None:
_log.debug('closing channel')
self._channel.close()
def kill(self, force=False):
_log.debug('killing service')
self.cancel_consumers()
self.cancel_timers()
if force:
self.kill_workers()
else:
self.wait_for_workers()
self.shut_down()
def link(self, *args, **kwargs):
return self.greenlet.link(*args, **kwargs)
