/usr/lib/python2.7/dist-packages/oslo_messaging/tests/functional/zmq/multiproc_utils.py is in python-oslo.messaging 5.35.0-0ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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#
# 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.
import logging
import logging.handlers
import multiprocessing
import os
import sys
import threading
import time
import uuid
from oslo_config import cfg
import oslo_messaging
from oslo_messaging._drivers.zmq_driver import zmq_async
from oslo_messaging.tests.functional import utils
LOG = logging.getLogger(__name__)
zmq = zmq_async.import_zmq()
class QueueHandler(logging.Handler):
"""This is a logging handler which sends events to a multiprocessing queue.
The plan is to add it to Python 3.2, but this can be copy pasted into
user code for use with earlier Python versions.
"""
def __init__(self, queue):
"""Initialise an instance, using the passed queue."""
logging.Handler.__init__(self)
self.queue = queue
def emit(self, record):
"""Emit a record.
Writes the LogRecord to the queue.
"""
try:
ei = record.exc_info
if ei:
# just to get traceback text into record.exc_text
dummy = self.format(record) # noqa
record.exc_info = None # not needed any more
self.queue.put_nowait(record)
except (KeyboardInterrupt, SystemExit):
raise
except Exception:
self.handleError(record)
def listener_configurer(conf):
root = logging.getLogger()
h = logging.StreamHandler(sys.stdout)
f = logging.Formatter('%(asctime)s %(processName)-10s %(name)s '
'%(levelname)-8s %(message)s')
h.setFormatter(f)
root.addHandler(h)
log_path = conf.oslo_messaging_zmq.rpc_zmq_ipc_dir + \
"/" + "zmq_multiproc.log"
file_handler = logging.StreamHandler(open(log_path, 'w'))
file_handler.setFormatter(f)
root.addHandler(file_handler)
def server_configurer(queue):
h = QueueHandler(queue)
root = logging.getLogger()
root.addHandler(h)
root.setLevel(logging.DEBUG)
def listener_thread(queue, configurer, conf):
configurer(conf)
while True:
time.sleep(0.3)
try:
record = queue.get()
if record is None:
break
logger = logging.getLogger(record.name)
logger.handle(record)
except (KeyboardInterrupt, SystemExit):
raise
class Client(oslo_messaging.RPCClient):
def __init__(self, transport, topic):
super(Client, self).__init__(
transport=transport, target=oslo_messaging.Target(topic=topic))
self.replies = []
def call_a(self):
LOG.warning("call_a - client side")
rep = self.call({}, 'call_a')
LOG.warning("after call_a - client side")
self.replies.append(rep)
return rep
class ReplyServerEndpoint(object):
def call_a(self, *args, **kwargs):
LOG.warning("call_a - Server endpoint reached!")
return "OK"
class Server(object):
def __init__(self, conf, log_queue, transport_url, name, topic=None):
self.conf = conf
self.log_queue = log_queue
self.transport_url = transport_url
self.name = name
self.topic = topic or str(uuid.uuid4())
self.ready = multiprocessing.Value('b', False)
self._stop = multiprocessing.Event()
def start(self):
self.process = multiprocessing.Process(target=self._run_server,
name=self.name,
args=(self.conf,
self.transport_url,
self.log_queue,
self.ready))
self.process.start()
LOG.debug("Server process started: pid: %d", self.process.pid)
def _run_server(self, conf, url, log_queue, ready):
server_configurer(log_queue)
LOG.debug("Starting RPC server")
transport = oslo_messaging.get_transport(conf, url=url)
target = oslo_messaging.Target(topic=self.topic, server=self.name)
self.rpc_server = oslo_messaging.get_rpc_server(
transport=transport, target=target,
endpoints=[ReplyServerEndpoint()],
executor='eventlet')
self.rpc_server.start()
ready.value = True
LOG.debug("RPC server being started")
while not self._stop.is_set():
LOG.debug("Waiting for the stop signal ...")
time.sleep(1)
self.rpc_server.stop()
self.rpc_server.wait()
LOG.debug("Leaving process T:%s Pid:%d", str(target), os.getpid())
def cleanup(self):
LOG.debug("Stopping server")
self.shutdown()
def shutdown(self):
self._stop.set()
def restart(self, time_for_restart=1):
pass
def hang(self):
pass
def crash(self):
pass
def ping(self):
pass
class MultiprocTestCase(utils.SkipIfNoTransportURL):
def setUp(self):
super(MultiprocTestCase, self).setUp(conf=cfg.ConfigOpts())
if not self.url.startswith("zmq"):
self.skipTest("ZeroMQ specific skipped...")
self.transport = oslo_messaging.get_transport(self.conf, url=self.url)
LOG.debug("Start log queue")
self.log_queue = multiprocessing.Queue()
self.log_listener = threading.Thread(target=listener_thread,
args=(self.log_queue,
listener_configurer,
self.conf))
self.log_listener.start()
self.spawned = []
self.conf.prog = "test_prog"
self.conf.project = "test_project"
def tearDown(self):
for process in self.spawned:
process.cleanup()
super(MultiprocTestCase, self).tearDown()
def get_client(self, topic):
return Client(self.transport, topic)
def spawn_server(self, wait_for_server=False, topic=None):
name = "server_%d_%s" % (len(self.spawned), str(uuid.uuid4())[:8])
server = Server(self.conf, self.log_queue, self.url, name, topic)
LOG.debug("[SPAWN] %s (starting)...", server.name)
server.start()
if wait_for_server:
while not server.ready.value:
LOG.debug("[SPAWN] %s (waiting for server ready)...",
server.name)
time.sleep(1)
LOG.debug("[SPAWN] Server %s:%d started.",
server.name, server.process.pid)
self.spawned.append(server)
return server
def spawn_servers(self, number, wait_for_server=False, common_topic=True):
topic = str(uuid.uuid4()) if common_topic else None
for _ in range(number):
self.spawn_server(wait_for_server, topic)
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