def test_process_timers(self):
start_timestamp = time()
expected_flushed_metrics_count = 2 + 5 # each timer has 5 separate metrics
metrics = (Counter('user.jump', 2), Set('username', 'navdoon'),
Timer('db.query', 300), Set('username', 'navdoon2'),
Counter('user.jump',
-1), Timer('db.query', 309), Timer('db.query', 303))
queue_ = Queue()
destination = StubDestination()
destination.expected_count = expected_flushed_metrics_count
processor = QueueProcessor(queue_)
processor.set_destinations([destination])
process_thread = Thread(target=processor.process)
process_thread.start()
processor.wait_until_processing(5)
for metric in metrics:
queue_.put(metric.to_request())
destination.wait_until_expected_count_items(5)
processor.shutdown()
processor.wait_until_shutdown(5)
self.assertEqual(expected_flushed_metrics_count,
len(destination.metrics))
metrics_dict = dict()
for (name, value, timestamp) in destination.metrics:
metrics_dict[name] = value
self.assertGreaterEqual(timestamp, start_timestamp)
self.assertEqual(metrics_dict['user.jump'], 1)
self.assertEqual(metrics_dict['username'], 2)
self.assertEqual(metrics_dict['db.query.count'], 3)
self.assertEqual(metrics_dict['db.query.max'], 309)
self.assertEqual(metrics_dict['db.query.min'], 300)
self.assertEqual(metrics_dict['db.query.mean'], 304)
self.assertEqual(metrics_dict['db.query.median'], 303)
def test_process(self):
expected_flushed_metrics_count = 2
metrics = (
Counter('user.jump', 2),
Set('username', 'navdoon'),
Set('username', 'navdoon.test'),
Counter('user.jump', 4),
Set('username', 'navdoon'),
Counter('user.jump', -1),
)
queue_ = Queue()
destination = StubDestination()
destination.expected_count = expected_flushed_metrics_count
processor = QueueProcessor(queue_)
processor.set_destinations([destination])
processor.init_destinations()
process_thread = Thread(target=processor.process)
process_thread.start()
processor.wait_until_processing(5)
for metric in metrics:
queue_.put(metric.to_request())
destination.wait_until_expected_count_items(5)
processor.shutdown()
processor.wait_until_shutdown(5)
self.assertEqual(expected_flushed_metrics_count,
len(destination.metrics))
self.assertEqual(('user.jump', 5), destination.metrics[0][:2])
self.assertEqual(('username', 2), destination.metrics[1][:2])
def test_process(self):
expected_flushed_metrics_count = 2
metrics = (Counter('user.jump', 2),
Set('username', 'navdoon'),
Set('username', 'navdoon.test'),
Counter('user.jump', 4),
Set('username', 'navdoon'),
Counter('user.jump', -1),)
queue_ = Queue()
destination = StubDestination()
destination.expected_count = expected_flushed_metrics_count
processor = QueueProcessor(queue_)
processor.set_destinations([destination])
processor.init_destinations()
process_thread = Thread(target=processor.process)
process_thread.start()
processor.wait_until_processing(5)
for metric in metrics:
queue_.put(metric.to_request())
destination.wait_until_expected_count_items(5)
processor.shutdown()
processor.wait_until_shutdown(5)
self.assertEqual(expected_flushed_metrics_count,
len(destination.metrics))
self.assertEqual(('user.jump', 5), destination.metrics[0][:2])
self.assertEqual(('username', 2), destination.metrics[1][:2])
def test_process_stops_on_stop_token_in_queue(self):
token = 'STOP'
expected_flushed_metrics_count = 2
metrics = (Counter('user.login', 1),
Set('username', 'navdoon'),
Counter('user.login', 3),
token,
Counter('user.login', -1),
Counter('user.logout', 1),)
queue_ = Queue()
destination = StubDestination()
destination.expected_count = expected_flushed_metrics_count
processor = QueueProcessor(queue_)
processor.flush_interval = 2
processor.stop_process_token = token
processor.set_destinations([destination])
process_thread = Thread(target=processor.process)
process_thread.start()
processor.wait_until_processing(5)
for metric in metrics:
if metric is token:
sleep(processor.flush_interval) # make sure one flush happened before token
request = metric
else:
request = metric.to_request()
queue_.put(request)
# make sure the processor has process the queue
processor.wait_until_shutdown(5)
self.assertFalse(processor.is_processing())
destination.wait_until_expected_count_items(10)
self.assertEqual(expected_flushed_metrics_count,
len(destination.metrics))
self.assertEqual(('user.login', 4), destination.metrics[0][:2])
self.assertEqual(('username', 1), destination.metrics[1][:2])
def test_set_the_queue(self):
queue_ = Queue()
processor = QueueProcessor(queue_)
self.assertEqual(queue_, processor.queue)
next_queue = Queue()
processor.queue = next_queue
self.assertEqual(next_queue, processor.queue)
def __init__(self, size):
# type: (int) -> None
LoggerMixIn.__init__(self)
self._size = int(size) # type: int
self._threads = [] # type: List[Thread]
self._queue = Queue() # type: Queue
self._queue_lock = RLock() # type: RLock
self._task_counter = 0 # type: int
self._task_results = dict() # type: Dict[int, Any]
self._stop_event = Event() # type: Event
self.log_signature = "threadpool " # type: str
def test_set_flush_interval_accepts_positive_numbers(self):
processor = QueueProcessor(Queue())
processor.flush_interval = 103
self.assertEqual(103, processor.flush_interval)
processor.flush_interval = 0.58
self.assertEqual(0.58, processor.flush_interval)
processor.flush_interval = '3.4'
self.assertEqual(3.4, processor.flush_interval)
def test_clear_destinations(self):
destination = StubDestination()
queue_ = Queue()
processor = QueueProcessor(queue_)
processor.set_destinations([destination])
self.assertEqual([destination], processor._destinations)
processor.clear_destinations()
self.assertEqual([], processor._destinations)
def test_get_set_queue(self):
def set_queue(queue_):
self.server.queue = queue_
self.assertRaises(ValueError, set_queue, "not a queue")
queue = Queue()
self.server.queue = queue
self.assertEqual(queue, self.server.queue)
def test_set_flush_interval_fails_on_not_positive_numbers(self):
processor = QueueProcessor(Queue())
def set_interval(value):
processor.flush_interval = value
self.assertRaises(ValueError, set_interval, 0)
self.assertRaises(ValueError, set_interval, -10)
self.assertRaises(ValueError, set_interval, "not a number")
def test_queue_can_only_change_when_not_processing(self):
processor = QueueProcessor(Queue())
orig_queue = processor.queue
process_thread = Thread(target=processor.process)
process_thread.start()
processor.wait_until_processing(5)
def set_queue(new_queue):
processor.queue = new_queue
new_queue = Queue()
self.assertRaises(Exception, set_queue, new_queue)
self.assertEqual(orig_queue, processor.queue)
processor.shutdown()
processor.wait_until_shutdown(5)
processor.queue = new_queue
self.assertEqual(new_queue, processor.queue)
def __init__(self, size):
LoggerMixIn.__init__(self)
self._size = int(size)
self._threads = []
self._queue = Queue()
self._queue_lock = RLock()
self._task_counter = 0
self._task_results = dict()
self._stop_event = Event()
self.log_signature = "threadpool "
def test_processor_does_not_accept_invalid_queue(self):
self.assertRaises(ValueError, QueueProcessor, "not a queue")
self.assertRaises(ValueError, QueueProcessor, 100)
processor = QueueProcessor(Queue())
def set_queue(value):
processor.queue = value
self.assertRaises(ValueError, set_queue, "not a queue")
self.assertRaises(ValueError, set_queue, 100)
def test_process_timers(self):
start_timestamp = time()
expected_flushed_metrics_count = 2 + 5 # each timer has 5 separate metrics
metrics = (Counter('user.jump', 2),
Set('username', 'navdoon'),
Timer('db.query', 300),
Set('username', 'navdoon2'),
Counter('user.jump', -1),
Timer('db.query', 309),
Timer('db.query', 303)
)
queue_ = Queue()
destination = StubDestination()
destination.expected_count = expected_flushed_metrics_count
processor = QueueProcessor(queue_)
processor.set_destinations([destination])
process_thread = Thread(target=processor.process)
process_thread.start()
processor.wait_until_processing(5)
for metric in metrics:
queue_.put(metric.to_request())
destination.wait_until_expected_count_items(5)
processor.shutdown()
processor.wait_until_shutdown(5)
self.assertEqual(expected_flushed_metrics_count,
len(destination.metrics))
metrics_dict = dict()
for (name, value, timestamp) in destination.metrics:
metrics_dict[name] = value
self.assertGreaterEqual(timestamp, start_timestamp)
self.assertEqual(metrics_dict['user.jump'], 1)
self.assertEqual(metrics_dict['username'], 2)
self.assertEqual(metrics_dict['db.query.count'], 3)
self.assertEqual(metrics_dict['db.query.max'], 309)
self.assertEqual(metrics_dict['db.query.min'], 300)
self.assertEqual(metrics_dict['db.query.mean'], 304)
self.assertEqual(metrics_dict['db.query.median'], 303)
def test_process_stops_on_stop_token_in_queue(self):
token = 'STOP'
expected_flushed_metrics_count = 2
metrics = (
Counter('user.login', 1),
Set('username', 'navdoon'),
Counter('user.login', 3),
token,
Counter('user.login', -1),
Counter('user.logout', 1),
)
queue_ = Queue()
destination = StubDestination()
destination.expected_count = expected_flushed_metrics_count
processor = QueueProcessor(queue_)
processor.flush_interval = 2
processor.stop_process_token = token
processor.set_destinations([destination])
process_thread = Thread(target=processor.process)
process_thread.start()
processor.wait_until_processing(5)
for metric in metrics:
if metric is token:
sleep(processor.flush_interval
) # make sure one flush happened before token
request = metric
else:
request = metric.to_request()
queue_.put(request)
# make sure the processor has process the queue
processor.wait_until_shutdown(5)
self.assertFalse(processor.is_processing())
destination.wait_until_expected_count_items(10)
self.assertEqual(expected_flushed_metrics_count,
len(destination.metrics))
self.assertEqual(('user.login', 4), destination.metrics[0][:2])
self.assertEqual(('username', 1), destination.metrics[1][:2])
def test_destinations_can_change_when_queue_processor_is_running(self):
processor = QueueProcessor(Queue())
try:
destinations = [StubDestination()]
processor.set_destinations(destinations)
processor_thread = Thread(target=processor.process)
processor_thread.start()
processor.wait_until_processing(10)
self.assertTrue(processor.is_processing())
new_destinations = [StubDestination()]
processor.set_destinations(new_destinations)
self.assertEqual(new_destinations, processor.get_destinations())
self.assertTrue(processor.is_processing())
finally:
processor.shutdown()
def test_continues_processing_after_reload(self):
metrics = (Counter('user.login',
1), Set('username',
'navdoon'), Counter('user.login', 3))
queue_ = Queue()
destination = StubDestination()
destination.expected_count = 1
processor = QueueProcessor(queue_)
processor.flush_interval = 1
processor.set_destinations([destination])
process_thread = Thread(target=processor.process)
process_thread.start()
processor.wait_until_processing(5)
expected_flushed_metrics2 = 2
destination2 = StubDestination()
destination2.expected_count = expected_flushed_metrics2
processor.set_destinations([destination2])
for metric in metrics:
queue_.put(metric.to_request())
destination.wait_until_expected_count_items(5)
processor.shutdown()
process_thread.join(5)
self.assertFalse(processor.is_processing())
self.assertGreaterEqual(len(destination.metrics), 1)
self.assertLessEqual(queue_.qsize(), 2)
for metric in metrics:
queue_.put(metric.to_request())
self.assertGreaterEqual(queue_.qsize(), len(metrics))
resume_process_thread = Thread(target=processor.process)
resume_process_thread.start()
processor.wait_until_processing(5)
self.assertTrue(processor.is_processing())
self.assertEqual(processor.get_destinations(), [destination2])
destination2.wait_until_expected_count_items(5)
processor.shutdown()
resume_process_thread.join(5)
self.assertGreaterEqual(len(destination2.metrics),
expected_flushed_metrics2)
def test_continues_processing_after_reload(self):
metrics = (Counter('user.login', 1), Set('username', 'navdoon'),
Counter('user.login', 3))
queue_ = Queue()
destination = StubDestination()
destination.expected_count = 1
processor = QueueProcessor(queue_)
processor.flush_interval = 1
processor.set_destinations([destination])
process_thread = Thread(target=processor.process)
process_thread.start()
processor.wait_until_processing(5)
expected_flushed_metrics2 = 2
destination2 = StubDestination()
destination2.expected_count = expected_flushed_metrics2
processor.set_destinations([destination2])
for metric in metrics:
queue_.put(metric.to_request())
destination.wait_until_expected_count_items(5)
processor.shutdown()
process_thread.join(5)
self.assertFalse(processor.is_processing())
self.assertGreaterEqual(len(destination.metrics), 1)
self.assertLessEqual(queue_.qsize(), 2)
for metric in metrics:
queue_.put(metric.to_request())
self.assertGreaterEqual(queue_.qsize(), len(metrics))
resume_process_thread = Thread(target=processor.process)
resume_process_thread.start()
processor.wait_until_processing(5)
self.assertTrue(processor.is_processing())
self.assertEqual(processor.get_destinations(), [destination2])
destination2.wait_until_expected_count_items(5)
processor.shutdown()
resume_process_thread.join(5)
self.assertGreaterEqual(len(destination2.metrics), expected_flushed_metrics2)
def init_destinations(self):
# type: () -> None
self._log_debug("initializing destination ...")
self._flush_threads_initialized.set()
self._stop_flush_threads()
self._clear_flush_threads()
self._log_debug("initializing {} destination threads ...".format(
len(self._destinations)))
for destination in self._destinations:
queue_ = Queue() # type: Queue
flush_thread = Thread(
target=self._flush_metrics_queue_to_destination,
args=(queue_, destination))
flush_thread.setDaemon(True)
flush_thread.start()
self._flush_queues.append(queue_)
self._flush_threads.append(flush_thread)
self._flush_threads_initialized.set()
self._log_debug("initialized {} destination threads".format(
len(self._flush_threads)))
def __init__(self):
self._queue = Queue() # type: Queue
def initialize(self):
# type: () -> ThreadPool
self._queue = Queue()
self._create_worker_threads()
self._start_worker_threads()
return self
class ThreadPool(LoggerMixIn):
def __init__(self, size):
# type: (int) -> None
LoggerMixIn.__init__(self)
self._size = int(size) # type: int
self._threads = [] # type: List[Thread]
self._queue = Queue() # type: Queue
self._queue_lock = RLock() # type: RLock
self._task_counter = 0 # type: int
self._task_results = dict() # type: Dict[int, Any]
self._stop_event = Event() # type: Event
self.log_signature = "threadpool " # type: str
def __del__(self):
# type: () -> None
if not self._stop_event.is_set():
self.stop()
@property
def size(self):
# type: () -> int
return self._size
@property
def threads(self):
# type: () -> List[Thread]
return self._threads
def initialize(self):
# type: () -> ThreadPool
self._queue = Queue()
self._create_worker_threads()
self._start_worker_threads()
return self
def do(self, func, *args, **kwargs):
# type: (Callable, *Any, **Any) -> int
if self._stop_event.is_set():
raise Exception("Task thread pool has stopped")
with self._queue_lock:
task_id = self._task_counter
self._task_counter += 1
self._handle_task(task_id, func, args, kwargs)
return task_id
def is_done(self):
# type: () -> bool
with self._queue_lock:
is_done = self._queue.empty()
return is_done
def wait_until_done(self):
# type: () -> ThreadPool
self._queue.join()
return self
def stop(self, wait=True, timeout=None):
# type: (bool, float) -> None
self._stop_event.set()
if wait:
num_threads = len(self._threads)
self._log_debug(
"joining {} worker threads ...".format(num_threads))
start_time = time()
counter = 0
for thread in self._threads:
counter += 1
self._log_debug("joining thread {} ...".format(counter))
thread.join(timeout)
if timeout is None:
continue
elif time() - start_time > timeout:
raise Exception("Stopping thread pool timedout")
self._log_debug("joined worker {} threads".format(num_threads))
self._threads = []
def get_result(self, task_id):
# type: (int) -> Any
if task_id not in self._task_results:
raise ValueError(
"No results found for task id '{}'".format(task_id))
return self._task_results[task_id]
def _handle_task(self, task_id, func, args, kwargs):
# type: (int, Callable, Sequence[Any], Dict[Any, Any]) -> None
self._queue.put((task_id, func, args, kwargs))
def _create_worker_threads(self):
# type: () -> None
for i in range(self._size):
worker = WorkerThread(self._queue, self._stop_event,
self._task_results)
self._threads.append(worker)
def _start_worker_threads(self):
# type: () -> ThreadPool
for thread in self._threads:
thread.start()
self._stop_event.clear()
return self
class ThreadPool(LoggerMixIn):
def __init__(self, size):
LoggerMixIn.__init__(self)
self._size = int(size)
self._threads = []
self._queue = Queue()
self._queue_lock = RLock()
self._task_counter = 0
self._task_results = dict()
self._stop_event = Event()
self.log_signature = "threadpool "
def __del__(self):
if not self._stop_event.is_set():
self.stop()
@property
def size(self):
return self._size
@property
def threads(self):
return self._threads
def initialize(self):
self._queue = Queue()
self._create_worker_threads()
self._start_worker_threads()
return self
def do(self, func, *args, **kwargs):
if self._stop_event.is_set():
raise Exception("Task thread pool has stopped")
with self._queue_lock:
task_id = self._task_counter
self._task_counter += 1
self._handle_task(task_id, func, args, kwargs)
return task_id
def is_done(self):
with self._queue_lock:
is_done = self._queue.empty()
return is_done
def wait_until_done(self):
self._queue.join()
return self
def stop(self, wait=True, timeout=None):
self._stop_event.set()
if wait:
num_threads = len(self._threads)
self._log_debug(
"joining {} worker threads ...".format(num_threads))
start_time = time()
counter = 0
for thread in self._threads:
counter += 1
self._log_debug("joining thread {} ...".format(counter))
thread.join(timeout)
if timeout is None:
continue
elif time() - start_time > timeout:
raise Exception("Stopping thread pool timedout")
self._log_debug("joined worker {} threads".format(num_threads))
self._threads = []
def get_result(self, task_id):
if task_id not in self._task_results:
raise ValueError(
"No results found for task id '{}'".format(task_id))
return self._task_results[task_id]
def _handle_task(self, task_id, func, args, kwargs):
self._queue.put((task_id, func, args, kwargs))
def _create_worker_threads(self):
for i in range(self._size):
worker = WorkerThread(self._queue, self._stop_event, self._task_results)
self._threads.append(worker)
def _start_worker_threads(self):
for thread in self._threads:
thread.start()
self._stop_event.clear()
return self
def initialize(self):
self._queue = Queue()
self._create_worker_threads()
self._start_worker_threads()
return self
def test_set_destinations_when_not_started(self):
processor = QueueProcessor(Queue())
destinations = [StubDestination()]
processor.set_destinations(destinations)
self.assertEqual(destinations, processor._destinations)
self.assertFalse(processor.is_processing())
def test_set_destination_fails_on_invalid_destination(self):
processor = QueueProcessor(Queue())
self.assertRaises(ValueError, processor.set_destinations,
"not a destination")
