/usr/lib/python2.7/dist-packages/celery/tests/functional/case.py is in python-celery 3.1.20-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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import atexit
import logging
import os
import signal
import socket
import sys
import traceback
from itertools import count
from time import time
from celery import current_app
from celery.exceptions import TimeoutError
from celery.app.control import flatten_reply
from celery.utils.imports import qualname
from celery.tests.case import Case
HOSTNAME = socket.gethostname()
def say(msg):
sys.stderr.write('%s\n' % msg)
def try_while(fun, reason='Timed out', timeout=10, interval=0.5):
time_start = time()
for iterations in count(0):
if time() - time_start >= timeout:
raise TimeoutError()
ret = fun()
if ret:
return ret
class Worker(object):
started = False
worker_ids = count(1)
_shutdown_called = False
def __init__(self, hostname, loglevel='error', app=None):
self.hostname = hostname
self.loglevel = loglevel
self.app = app or current_app._get_current_object()
def start(self):
if not self.started:
self._fork_and_exec()
self.started = True
def _fork_and_exec(self):
pid = os.fork()
if pid == 0:
self.app.worker_main(['worker', '--loglevel=INFO',
'-n', self.hostname,
'-P', 'solo'])
os._exit(0)
self.pid = pid
def ping(self, *args, **kwargs):
return self.app.control.ping(*args, **kwargs)
def is_alive(self, timeout=1):
r = self.ping(destination=[self.hostname], timeout=timeout)
return self.hostname in flatten_reply(r)
def wait_until_started(self, timeout=10, interval=0.5):
try_while(
lambda: self.is_alive(interval),
"Worker won't start (after %s secs.)" % timeout,
interval=interval, timeout=timeout,
)
say('--WORKER %s IS ONLINE--' % self.hostname)
def ensure_shutdown(self, timeout=10, interval=0.5):
os.kill(self.pid, signal.SIGTERM)
try_while(
lambda: not self.is_alive(interval),
"Worker won't shutdown (after %s secs.)" % timeout,
timeout=10, interval=0.5,
)
say('--WORKER %s IS SHUTDOWN--' % self.hostname)
self._shutdown_called = True
def ensure_started(self):
self.start()
self.wait_until_started()
@classmethod
def managed(cls, hostname=None, caller=None):
hostname = hostname or socket.gethostname()
if caller:
hostname = '.'.join([qualname(caller), hostname])
else:
hostname += str(next(cls.worker_ids()))
worker = cls(hostname)
worker.ensure_started()
stack = traceback.format_stack()
@atexit.register
def _ensure_shutdown_once():
if not worker._shutdown_called:
say('-- Found worker not stopped at shutdown: %s\n%s' % (
worker.hostname,
'\n'.join(stack)))
worker.ensure_shutdown()
return worker
class WorkerCase(Case):
hostname = HOSTNAME
worker = None
@classmethod
def setUpClass(cls):
logging.getLogger('amqp').setLevel(logging.ERROR)
cls.worker = Worker.managed(cls.hostname, caller=cls)
@classmethod
def tearDownClass(cls):
cls.worker.ensure_shutdown()
def assertWorkerAlive(self, timeout=1):
self.assertTrue(self.worker.is_alive)
def inspect(self, timeout=1):
return self.app.control.inspect([self.worker.hostname],
timeout=timeout)
def my_response(self, response):
return flatten_reply(response)[self.worker.hostname]
def is_accepted(self, task_id, interval=0.5):
active = self.inspect(timeout=interval).active()
if active:
for task in active[self.worker.hostname]:
if task['id'] == task_id:
return True
return False
def is_reserved(self, task_id, interval=0.5):
reserved = self.inspect(timeout=interval).reserved()
if reserved:
for task in reserved[self.worker.hostname]:
if task['id'] == task_id:
return True
return False
def is_scheduled(self, task_id, interval=0.5):
schedule = self.inspect(timeout=interval).scheduled()
if schedule:
for item in schedule[self.worker.hostname]:
if item['request']['id'] == task_id:
return True
return False
def is_received(self, task_id, interval=0.5):
return (self.is_reserved(task_id, interval) or
self.is_scheduled(task_id, interval) or
self.is_accepted(task_id, interval))
def ensure_accepted(self, task_id, interval=0.5, timeout=10):
return try_while(lambda: self.is_accepted(task_id, interval),
'Task not accepted within timeout',
interval=0.5, timeout=10)
def ensure_received(self, task_id, interval=0.5, timeout=10):
return try_while(lambda: self.is_received(task_id, interval),
'Task not receied within timeout',
interval=0.5, timeout=10)
def ensure_scheduled(self, task_id, interval=0.5, timeout=10):
return try_while(lambda: self.is_scheduled(task_id, interval),
'Task not scheduled within timeout',
interval=0.5, timeout=10)
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