class WebServer(object):
def __init__(self):
self._log = logging.getLogger("WebServer")
authenticator = SqlAuthenticator()
self._central_connection = get_central_connection()
self._cluster_row = get_cluster_row(self._central_connection)
self._node_local_connection = get_node_local_connection()
self._unified_id_factory = UnifiedIDFactory(
self._central_connection,
_get_shard_id(self._central_connection, self._cluster_row.id)
)
self._deliverator = Deliverator()
self._zeromq_context = zmq.Context()
self._pull_server = GreenletPULLServer(
self._zeromq_context,
_web_server_pipeline_address,
self._deliverator
)
self._pull_server.link_exception(self._unhandled_greenlet_exception)
# message sent to data readers and writers telling them the server
# is (re)starting, thereby invalidating any archvies or retrieved
# that are in progress for this node
timestamp = create_timestamp()
start_message = {
"message-type" : "web-server-start",
"priority" : create_priority(),
"unified-id" : self._unified_id_factory.next(),
"timestamp-repr" : repr(timestamp),
"source-node-name" : _local_node_name,
}
self._data_writer_clients = list()
for node_name, address in zip(_node_names, _data_writer_addresses):
resilient_client = GreenletResilientClient(
self._zeromq_context,
node_name,
address,
_client_tag,
_web_server_pipeline_address,
self._deliverator,
connect_messages=[start_message, ]
)
resilient_client.link_exception(self._unhandled_greenlet_exception)
self._data_writer_clients.append(resilient_client)
self._data_reader_clients = list()
self._data_readers = list()
for node_name, address in zip(_node_names, _data_reader_addresses):
resilient_client = GreenletResilientClient(
self._zeromq_context,
node_name,
address,
_client_tag,
_web_server_pipeline_address,
self._deliverator,
connect_messages=[start_message, ]
)
resilient_client.link_exception(self._unhandled_greenlet_exception)
self._data_reader_clients.append(resilient_client)
data_reader = DataReader(
node_name, resilient_client
)
self._data_readers.append(data_reader)
self._space_accounting_dealer_client = GreenletDealerClient(
self._zeromq_context,
_local_node_name,
_space_accounting_server_address
)
self._space_accounting_dealer_client.link_exception(
self._unhandled_greenlet_exception
)
push_client = GreenletPUSHClient(
self._zeromq_context,
_local_node_name,
_space_accounting_pipeline_address,
)
self._accounting_client = SpaceAccountingClient(
_local_node_name,
self._space_accounting_dealer_client,
push_client
)
self._event_push_client = EventPushClient(
self._zeromq_context,
"web-server"
)
self._watcher = Watcher(
_stats,
self._data_reader_clients,
self._data_writer_clients,
self._event_push_client
)
id_translator_keys_path = os.path.join(
_repository_path, "id_translator_keys.pkl"
)
with open(id_translator_keys_path, "r") as input_file:
id_translator_keys = pickle.load(input_file)
self._id_translator = InternalIDTranslator(
id_translator_keys["key"],
id_translator_keys["hmac_key"],
id_translator_keys["iv_key"],
id_translator_keys["hmac_size"]
)
self.application = Application(
self._central_connection,
self._node_local_connection,
self._cluster_row,
self._unified_id_factory,
self._id_translator,
self._data_writer_clients,
self._data_readers,
authenticator,
self._accounting_client,
self._event_push_client,
_stats
)
self.wsgi_server = WSGIServer(
(_web_server_host, _web_server_port),
application=self.application,
backlog=_wsgi_backlog
)
def start(self):
self._space_accounting_dealer_client.start()
self._pull_server.start()
self._watcher.start()
for client in self._data_writer_clients:
client.start()
for client in self._data_reader_clients:
client.start()
self.wsgi_server.start()
def stop(self):
self._log.info("stopping wsgi web server")
self.wsgi_server.stop()
self._accounting_client.close()
self._log.debug("killing greenlets")
self._space_accounting_dealer_client.kill()
self._pull_server.kill()
self._watcher.kill()
for client in self._data_writer_clients:
client.kill()
for client in self._data_reader_clients:
client.kill()
self._log.debug("joining greenlets")
self._space_accounting_dealer_client.join()
self._pull_server.join()
self._watcher.join()
for client in self._data_writer_clients:
client.join()
for client in self._data_reader_clients:
client.join()
self._log.debug("closing zmq")
self._event_push_client.close()
self._zeromq_context.term()
self._log.info("closing database connections")
self._central_connection.close()
self._node_local_connection.close()
def _unhandled_greenlet_exception(self, greenlet_object):
try:
greenlet_object.get()
except Exception:
self._log.exception(str(greenlet_object))
exctype, value = sys.exc_info()[:2]
self._event_push_client.exception(
"unhandled_greenlet_exception",
str(value),
exctype=exctype.__name__
)
class WebPublicReaderServer(object):
def __init__(self, halt_event):
self._log = logging.getLogger("WebServer")
memcached_client = create_memcached_client()
self._interaction_pool = \
gdbpool.interaction_pool.DBInteractionPool(
get_central_database_dsn(),
pool_name=_central_pool_name,
pool_size=_central_database_pool_size,
do_log=True)
self._interaction_pool.add_pool(
dsn=get_node_local_database_dsn(),
pool_name=_local_node_name,
pool_size=_local_database_pool_size)
# Ticket #25: must run database operation in a greenlet
greenlet = gevent.Greenlet.spawn(_get_cluster_row,
self._interaction_pool)
greenlet.join()
self._cluster_row = greenlet.get()
authenticator = \
InteractionPoolAuthenticator(memcached_client,
self._interaction_pool)
self._zeromq_context = zmq.Context()
self._space_accounting_dealer_client = GreenletDealerClient(
self._zeromq_context,
_local_node_name,
_space_accounting_server_address
)
self._space_accounting_dealer_client.link_exception(
self._unhandled_greenlet_exception
)
push_client = GreenletPUSHClient(
self._zeromq_context,
_local_node_name,
_space_accounting_pipeline_address,
)
self._accounting_client = SpaceAccountingClient(
_local_node_name,
self._space_accounting_dealer_client,
push_client
)
self._event_push_client = EventPushClient(
self._zeromq_context,
"web-server"
)
id_translator_keys_path = os.environ.get(
"NIMBUS_IO_ID_TRANSLATION_KEYS",
os.path.join(_repository_path, "id_translator_keys.pkl"))
with open(id_translator_keys_path, "r") as input_file:
id_translator_keys = pickle.load(input_file)
self._id_translator = InternalIDTranslator(
id_translator_keys["key"],
id_translator_keys["hmac_key"],
id_translator_keys["iv_key"],
id_translator_keys["hmac_size"]
)
redis_queue = gevent.queue.Queue()
self._redis_sink = OperationalStatsRedisSink(halt_event,
redis_queue,
_local_node_name)
self._redis_sink.link_exception(self._unhandled_greenlet_exception)
self.application = Application(
self._interaction_pool,
self._cluster_row,
self._id_translator,
authenticator,
self._accounting_client,
self._event_push_client,
redis_queue
)
self.wsgi_server = WSGIServer(
(_web_public_reader_host, _web_public_reader_port),
application=self.application,
backlog=_wsgi_backlog,
log=sys.stdout
)
def start(self):
self._space_accounting_dealer_client.start()
self._redis_sink.start()
self.wsgi_server.start()
def stop(self):
self._log.info("stopping wsgi web server")
self.wsgi_server.stop()
self._accounting_client.close()
self._log.debug("killing greenlets")
self._space_accounting_dealer_client.kill()
self._log.debug("joining greenlets")
self._space_accounting_dealer_client.join()
self._redis_sink.kill()
self._log.debug("closing zmq")
self._event_push_client.close()
self._zeromq_context.term()
def _unhandled_greenlet_exception(self, greenlet_object):
try:
greenlet_object.get()
except Exception:
self._log.exception(str(greenlet_object))
exctype, value = sys.exc_info()[:2]
self._event_push_client.exception(
"unhandled_greenlet_exception",
str(value),
exctype=exctype.__name__
)
class WebPublicReaderServer(object):
def __init__(self, halt_event):
self._log = logging.getLogger("WebServer")
memcached_client = create_memcached_client()
self._interaction_pool = \
gdbpool.interaction_pool.DBInteractionPool(
get_central_database_dsn(),
pool_name=_central_pool_name,
pool_size=_central_database_pool_size,
do_log=True)
self._interaction_pool.add_pool(dsn=get_node_local_database_dsn(),
pool_name=_local_node_name,
pool_size=_local_database_pool_size)
# Ticket #25: must run database operation in a greenlet
greenlet = gevent.Greenlet.spawn(_get_cluster_row,
self._interaction_pool)
greenlet.join()
self._cluster_row = greenlet.get()
authenticator = \
InteractionPoolAuthenticator(memcached_client,
self._interaction_pool)
self._zeromq_context = zmq.Context()
self._space_accounting_dealer_client = GreenletDealerClient(
self._zeromq_context, _local_node_name,
_space_accounting_server_address)
self._space_accounting_dealer_client.link_exception(
self._unhandled_greenlet_exception)
push_client = GreenletPUSHClient(
self._zeromq_context,
_local_node_name,
_space_accounting_pipeline_address,
)
self._accounting_client = SpaceAccountingClient(
_local_node_name, self._space_accounting_dealer_client,
push_client)
self._event_push_client = EventPushClient(self._zeromq_context,
"web-server")
id_translator_keys_path = os.environ.get(
"NIMBUS_IO_ID_TRANSLATION_KEYS",
os.path.join(_repository_path, "id_translator_keys.pkl"))
with open(id_translator_keys_path, "r") as input_file:
id_translator_keys = pickle.load(input_file)
self._id_translator = InternalIDTranslator(
id_translator_keys["key"], id_translator_keys["hmac_key"],
id_translator_keys["iv_key"], id_translator_keys["hmac_size"])
redis_queue = gevent.queue.Queue()
self._redis_sink = OperationalStatsRedisSink(halt_event, redis_queue,
_local_node_name)
self._redis_sink.link_exception(self._unhandled_greenlet_exception)
self.application = Application(self._interaction_pool,
self._cluster_row, self._id_translator,
authenticator, self._accounting_client,
self._event_push_client, redis_queue)
self.wsgi_server = WSGIServer(
(_web_public_reader_host, _web_public_reader_port),
application=self.application,
backlog=_wsgi_backlog,
log=sys.stdout)
def start(self):
self._space_accounting_dealer_client.start()
self._redis_sink.start()
self.wsgi_server.start()
def stop(self):
self._log.info("stopping wsgi web server")
self.wsgi_server.stop()
self._accounting_client.close()
self._log.debug("killing greenlets")
self._space_accounting_dealer_client.kill()
self._log.debug("joining greenlets")
self._space_accounting_dealer_client.join()
self._redis_sink.kill()
self._log.debug("closing zmq")
self._event_push_client.close()
self._zeromq_context.term()
def _unhandled_greenlet_exception(self, greenlet_object):
try:
greenlet_object.get()
except Exception:
self._log.exception(str(greenlet_object))
exctype, value = sys.exc_info()[:2]
self._event_push_client.exception("unhandled_greenlet_exception",
str(value),
exctype=exctype.__name__)
class WebInternalReader(object):
def __init__(self):
self._log = logging.getLogger("WebInternalReader")
memcached_client = memcache.Client(_memcached_nodes)
self._central_connection = get_central_connection()
self._cluster_row = get_cluster_row(self._central_connection)
self._node_local_connection = get_node_local_connection()
self._deliverator = Deliverator()
self._zeromq_context = zmq.Context()
self._pull_server = GreenletPULLServer(
self._zeromq_context,
_web_internal_reader_pipeline_address,
self._deliverator
)
self._pull_server.link_exception(self._unhandled_greenlet_exception)
self._data_reader_clients = list()
self._data_readers = list()
for node_name, address in zip(_node_names, _data_reader_addresses):
resilient_client = GreenletResilientClient(
self._zeromq_context,
node_name,
address,
_client_tag,
_web_internal_reader_pipeline_address,
self._deliverator,
connect_messages=[]
)
resilient_client.link_exception(self._unhandled_greenlet_exception)
self._data_reader_clients.append(resilient_client)
data_reader = DataReader(
node_name, resilient_client
)
self._data_readers.append(data_reader)
self._space_accounting_dealer_client = GreenletDealerClient(
self._zeromq_context,
_local_node_name,
_space_accounting_server_address
)
self._space_accounting_dealer_client.link_exception(
self._unhandled_greenlet_exception
)
push_client = GreenletPUSHClient(
self._zeromq_context,
_local_node_name,
_space_accounting_pipeline_address,
)
self._accounting_client = SpaceAccountingClient(
_local_node_name,
self._space_accounting_dealer_client,
push_client
)
self._event_push_client = EventPushClient(
self._zeromq_context,
"web-internal-reader"
)
# message sent to data readers telling them the server
# is (re)starting, thereby invalidating any archvies or retrieved
# that are in progress for this node
timestamp = create_timestamp()
self._event_push_client.info("web-reader-start",
"web reader (re)start",
timestamp_repr=repr(timestamp),
source_node_name=_local_node_name)
self._watcher = Watcher(
_stats,
self._data_reader_clients,
self._event_push_client
)
self.application = Application(
memcached_client,
self._central_connection,
self._node_local_connection,
self._cluster_row,
self._data_readers,
self._accounting_client,
self._event_push_client,
_stats
)
self.wsgi_server = WSGIServer(
(_web_internal_reader_host, _web_internal_reader_port),
application=self.application,
backlog=_wsgi_backlog
)
def start(self):
self._space_accounting_dealer_client.start()
self._pull_server.start()
self._watcher.start()
for client in self._data_reader_clients:
client.start()
self.wsgi_server.start()
def stop(self):
self._log.info("stopping wsgi web server")
self.wsgi_server.stop()
self._accounting_client.close()
self._log.debug("killing greenlets")
self._space_accounting_dealer_client.kill()
self._pull_server.kill()
self._watcher.kill()
for client in self._data_reader_clients:
client.kill()
self._log.debug("joining greenlets")
self._space_accounting_dealer_client.join()
self._pull_server.join()
self._watcher.join()
for client in self._data_reader_clients:
client.join()
self._log.debug("closing zmq")
self._event_push_client.close()
self._zeromq_context.term()
self._log.info("closing database connections")
self._central_connection.close()
self._node_local_connection.close()
def _unhandled_greenlet_exception(self, greenlet_object):
try:
greenlet_object.get()
except Exception:
self._log.exception(str(greenlet_object))
class WebWriter(object):
def __init__(self, halt_event):
self._log = logging.getLogger("WebWriter")
memcached_client = memcache.Client(_memcached_nodes)
self._interaction_pool = gdbpool.interaction_pool.DBInteractionPool(
get_central_database_dsn(),
pool_name=_central_pool_name,
pool_size=_database_pool_size,
do_log=True)
authenticator = InteractionPoolAuthenticator(memcached_client,
self._interaction_pool)
# Ticket #25: must run database operation in a greenlet
greenlet = gevent.Greenlet.spawn(_get_cluster_row_and_node_row,
self._interaction_pool)
greenlet.join()
self._cluster_row, node_row = greenlet.get()
self._unified_id_factory = UnifiedIDFactory(node_row.id)
self._deliverator = Deliverator()
self._zeromq_context = zmq.Context()
self._pull_server = GreenletPULLServer(
self._zeromq_context,
_web_writer_pipeliner_address,
self._deliverator
)
self._pull_server.link_exception(self._unhandled_greenlet_exception)
self._data_writer_clients = list()
for node_name, address in zip(_node_names, _data_writer_addresses):
resilient_client = GreenletResilientClient(
self._zeromq_context,
node_name,
address,
_client_tag,
_web_writer_pipeliner_address,
self._deliverator,
connect_messages=[]
)
resilient_client.link_exception(self._unhandled_greenlet_exception)
self._data_writer_clients.append(resilient_client)
self._space_accounting_dealer_client = GreenletDealerClient(
self._zeromq_context,
_local_node_name,
_space_accounting_server_address
)
self._space_accounting_dealer_client.link_exception(
self._unhandled_greenlet_exception
)
push_client = GreenletPUSHClient(
self._zeromq_context,
_local_node_name,
_space_accounting_pipeline_address,
)
self._accounting_client = SpaceAccountingClient(
_local_node_name,
self._space_accounting_dealer_client,
push_client
)
self._event_push_client = EventPushClient(
self._zeromq_context,
"web-server"
)
# message sent to data writers telling them the server
# is (re)starting, thereby invalidating any archives
# that are in progress for this node
unified_id = self._unified_id_factory.next()
timestamp = create_timestamp()
self._event_push_client.info("web-writer-start",
"web writer (re)start",
unified_id=unified_id,
timestamp_repr=repr(timestamp),
source_node_name=_local_node_name)
id_translator_keys_path = os.environ.get(
"NIMBUS_IO_ID_TRANSLATION_KEYS",
os.path.join(_repository_path, "id_translator_keys.pkl"))
with open(id_translator_keys_path, "r") as input_file:
id_translator_keys = pickle.load(input_file)
self._id_translator = InternalIDTranslator(
id_translator_keys["key"],
id_translator_keys["hmac_key"],
id_translator_keys["iv_key"],
id_translator_keys["hmac_size"]
)
redis_queue = gevent.queue.Queue()
self._redis_sink = OperationalStatsRedisSink(halt_event,
redis_queue,
_local_node_name)
self._redis_sink.link_exception(self._unhandled_greenlet_exception)
self.application = Application(
self._cluster_row,
self._unified_id_factory,
self._id_translator,
self._data_writer_clients,
authenticator,
self._accounting_client,
self._event_push_client,
redis_queue
)
self.wsgi_server = WSGIServer((_web_writer_host, _web_writer_port),
application=self.application,
backlog=_wsgi_backlog
)
def start(self):
self._space_accounting_dealer_client.start()
self._pull_server.start()
for client in self._data_writer_clients:
client.start()
self._redis_sink.start()
self.wsgi_server.start()
def stop(self):
self._log.info("stopping wsgi web server")
self.wsgi_server.stop()
self._accounting_client.close()
self._log.debug("killing greenlets")
self._space_accounting_dealer_client.kill()
self._pull_server.kill()
for client in self._data_writer_clients:
client.kill()
self._redis_sink.kill()
self._log.debug("joining greenlets")
self._space_accounting_dealer_client.join()
self._pull_server.join()
for client in self._data_writer_clients:
client.join()
self._redis_sink.kill()
self._log.debug("closing zmq")
self._event_push_client.close()
self._zeromq_context.term()
def _unhandled_greenlet_exception(self, greenlet_object):
try:
greenlet_object.get()
except Exception:
self._log.exception(str(greenlet_object))
exctype, value = sys.exc_info()[:2]
self._event_push_client.exception(
"unhandled_greenlet_exception",
str(value),
exctype=exctype.__name__
)
class WebWriter(object):
def __init__(self, halt_event):
self._log = logging.getLogger("WebWriter")
memcached_client = memcache.Client(_memcached_nodes)
self._interaction_pool = gdbpool.interaction_pool.DBInteractionPool(
get_central_database_dsn(),
pool_name=_central_pool_name,
pool_size=_database_pool_size,
do_log=True)
authenticator = InteractionPoolAuthenticator(memcached_client,
self._interaction_pool)
# Ticket #25: must run database operation in a greenlet
greenlet = gevent.Greenlet.spawn(_get_cluster_row_and_node_row,
self._interaction_pool)
greenlet.join()
self._cluster_row, node_row = greenlet.get()
self._unified_id_factory = UnifiedIDFactory(node_row.id)
self._deliverator = Deliverator()
self._zeromq_context = zmq.Context()
self._pull_server = GreenletPULLServer(self._zeromq_context,
_web_writer_pipeliner_address,
self._deliverator)
self._pull_server.link_exception(self._unhandled_greenlet_exception)
self._data_writer_clients = list()
for node_name, address in zip(_node_names, _data_writer_addresses):
resilient_client = GreenletResilientClient(
self._zeromq_context,
node_name,
address,
_client_tag,
_web_writer_pipeliner_address,
self._deliverator,
connect_messages=[])
resilient_client.link_exception(self._unhandled_greenlet_exception)
self._data_writer_clients.append(resilient_client)
self._space_accounting_dealer_client = GreenletDealerClient(
self._zeromq_context, _local_node_name,
_space_accounting_server_address)
self._space_accounting_dealer_client.link_exception(
self._unhandled_greenlet_exception)
push_client = GreenletPUSHClient(
self._zeromq_context,
_local_node_name,
_space_accounting_pipeline_address,
)
self._accounting_client = SpaceAccountingClient(
_local_node_name, self._space_accounting_dealer_client,
push_client)
self._event_push_client = EventPushClient(self._zeromq_context,
"web-server")
# message sent to data writers telling them the server
# is (re)starting, thereby invalidating any archives
# that are in progress for this node
unified_id = self._unified_id_factory.next()
timestamp = create_timestamp()
self._event_push_client.info("web-writer-start",
"web writer (re)start",
unified_id=unified_id,
timestamp_repr=repr(timestamp),
source_node_name=_local_node_name)
id_translator_keys_path = os.environ.get(
"NIMBUS_IO_ID_TRANSLATION_KEYS",
os.path.join(_repository_path, "id_translator_keys.pkl"))
with open(id_translator_keys_path, "r") as input_file:
id_translator_keys = pickle.load(input_file)
self._id_translator = InternalIDTranslator(
id_translator_keys["key"], id_translator_keys["hmac_key"],
id_translator_keys["iv_key"], id_translator_keys["hmac_size"])
redis_queue = gevent.queue.Queue()
self._redis_sink = OperationalStatsRedisSink(halt_event, redis_queue,
_local_node_name)
self._redis_sink.link_exception(self._unhandled_greenlet_exception)
self.application = Application(self._cluster_row,
self._unified_id_factory,
self._id_translator,
self._data_writer_clients,
authenticator, self._accounting_client,
self._event_push_client, redis_queue)
self.wsgi_server = WSGIServer((_web_writer_host, _web_writer_port),
application=self.application,
backlog=_wsgi_backlog)
def start(self):
self._space_accounting_dealer_client.start()
self._pull_server.start()
for client in self._data_writer_clients:
client.start()
self._redis_sink.start()
self.wsgi_server.start()
def stop(self):
self._log.info("stopping wsgi web server")
self.wsgi_server.stop()
self._accounting_client.close()
self._log.debug("killing greenlets")
self._space_accounting_dealer_client.kill()
self._pull_server.kill()
for client in self._data_writer_clients:
client.kill()
self._redis_sink.kill()
self._log.debug("joining greenlets")
self._space_accounting_dealer_client.join()
self._pull_server.join()
for client in self._data_writer_clients:
client.join()
self._redis_sink.kill()
self._log.debug("closing zmq")
self._event_push_client.close()
self._zeromq_context.term()
def _unhandled_greenlet_exception(self, greenlet_object):
try:
greenlet_object.get()
except Exception:
self._log.exception(str(greenlet_object))
exctype, value = sys.exc_info()[:2]
self._event_push_client.exception("unhandled_greenlet_exception",
str(value),
exctype=exctype.__name__)
class WebInternalReader(object):
def __init__(self):
self._log = logging.getLogger("WebInternalReader")
memcached_client = memcache.Client(_memcached_nodes)
self._central_connection = get_central_connection()
self._cluster_row = get_cluster_row(self._central_connection)
self._node_local_connection = get_node_local_connection()
self._deliverator = Deliverator()
self._zeromq_context = zmq.Context()
self._pull_server = GreenletPULLServer(
self._zeromq_context, _web_internal_reader_pipeline_address,
self._deliverator)
self._pull_server.link_exception(self._unhandled_greenlet_exception)
self._data_reader_clients = list()
self._data_readers = list()
for node_name, address in zip(_node_names, _data_reader_addresses):
resilient_client = GreenletResilientClient(
self._zeromq_context,
node_name,
address,
_client_tag,
_web_internal_reader_pipeline_address,
self._deliverator,
connect_messages=[])
resilient_client.link_exception(self._unhandled_greenlet_exception)
self._data_reader_clients.append(resilient_client)
data_reader = DataReader(node_name, resilient_client)
self._data_readers.append(data_reader)
self._space_accounting_dealer_client = GreenletDealerClient(
self._zeromq_context, _local_node_name,
_space_accounting_server_address)
self._space_accounting_dealer_client.link_exception(
self._unhandled_greenlet_exception)
push_client = GreenletPUSHClient(
self._zeromq_context,
_local_node_name,
_space_accounting_pipeline_address,
)
self._accounting_client = SpaceAccountingClient(
_local_node_name, self._space_accounting_dealer_client,
push_client)
self._event_push_client = EventPushClient(self._zeromq_context,
"web-internal-reader")
# message sent to data readers telling them the server
# is (re)starting, thereby invalidating any archvies or retrieved
# that are in progress for this node
timestamp = create_timestamp()
self._event_push_client.info("web-reader-start",
"web reader (re)start",
timestamp_repr=repr(timestamp),
source_node_name=_local_node_name)
self._watcher = Watcher(_stats, self._data_reader_clients,
self._event_push_client)
self.application = Application(memcached_client,
self._central_connection,
self._node_local_connection,
self._cluster_row, self._data_readers,
self._accounting_client,
self._event_push_client, _stats)
self.wsgi_server = WSGIServer(
(_web_internal_reader_host, _web_internal_reader_port),
application=self.application,
backlog=_wsgi_backlog)
def start(self):
self._space_accounting_dealer_client.start()
self._pull_server.start()
self._watcher.start()
for client in self._data_reader_clients:
client.start()
self.wsgi_server.start()
def stop(self):
self._log.info("stopping wsgi web server")
self.wsgi_server.stop()
self._accounting_client.close()
self._log.debug("killing greenlets")
self._space_accounting_dealer_client.kill()
self._pull_server.kill()
self._watcher.kill()
for client in self._data_reader_clients:
client.kill()
self._log.debug("joining greenlets")
self._space_accounting_dealer_client.join()
self._pull_server.join()
self._watcher.join()
for client in self._data_reader_clients:
client.join()
self._log.debug("closing zmq")
self._event_push_client.close()
self._zeromq_context.term()
self._log.info("closing database connections")
self._central_connection.close()
self._node_local_connection.close()
def _unhandled_greenlet_exception(self, greenlet_object):
try:
greenlet_object.get()
except Exception:
self._log.exception(str(greenlet_object))