class SyncClient:
idle = idle
backward_class = BackwardWorker
forward_class = ForwardWorker
def __init__(self,
host_url,
resource,
auth=None,
params={},
headers=None,
retrievers_params=DEFAULT_RETRIEVERS_PARAMS,
adaptive=False,
with_priority=False):
LOGGER.info(f'Init SyncClient for resource {resource}')
self.host = host_url
self.auth = auth
self.resource = resource
self.adaptive = adaptive
self.headers = headers
self.params = params
self.retrievers_params = retrievers_params
self.queue = PriorityQueue(maxsize=retrievers_params['queue_size'])
def init_clients(self):
self.backward_client = ResourceClient(self.host, self.resource,
self.params, self.auth,
self.headers)
self.forward_client = ResourceClient(self.host, self.resource,
self.params, self.auth,
self.headers)
def handle_response_data(self, data):
for resource_item in data:
self.queue.put(PrioritizedItem(1, resource_item))
def worker_watcher(self):
while True:
if time() - self.heartbeat > DEFAULT_FORWARD_HEARTBEAT:
self.restart_sync()
LOGGER.warning(
'Restart sync, reason: Last response from workers greater than 15 min ago.'
)
sleep(300)
def start_sync(self):
LOGGER.info('Start sync...')
data = self.backward_client.get_resource_items(self.params)
self.handle_response_data(data[f'{self.resource}s'])
forward_params = deepcopy(self.params)
forward_params.update({
k: v[0]
for k, v in parse.parse_qs(parse.urlparse(
data.links.prev).query).items()
})
backward_params = deepcopy(self.params)
backward_params.update({
k: v[0]
for k, v in parse.parse_qs(parse.urlparse(
data.links.next).query).items()
})
self.forward_worker = self.forward_class(sync_client=self,
client=self.forward_client,
params=forward_params)
self.backward_worker = self.backward_class(sync_client=self,
client=self.backward_client,
params=backward_params)
self.workers = [self.forward_worker, self.backward_worker]
for worker in self.workers:
worker.start()
self.heartbeat = time()
self.watcher = spawn(self.worker_watcher)
def restart_sync(self):
"""
Restart retrieving from OCDS API.
"""
LOGGER.info('Restart workers')
for worker in self.workers:
worker.kill()
self.watcher.kill()
self.init_clients()
self.start_sync()
def get_resource_items(self):
self.init_clients()
self.start_sync()
while True:
if self.forward_worker.check() or self.backward_worker.check():
self.restart_sync()
while not self.queue.empty():
LOGGER.debug(f'Sync queue size: {self.queue.qsize()}',
extra={'SYNC_QUEUE_SIZE': self.queue.qsize()})
LOGGER.debug('Yield resource item',
extra={'MESSAGE_ID': 'sync_yield'})
item = self.queue.get()
yield item.data
LOGGER.debug(f'Sync queue size: {self.queue.qsize()}',
extra={'SYNC_QUEUE_SIZE': self.queue.qsize()})
try:
self.queue.peek(block=True, timeout=0.1)
except Empty:
pass
class PriorityBlockingQueue(object):
"""
带优先级的阻塞队列。
优先级数字越小，优先级越高。
插入元素：
* put: 向队列尾部插入一个元素，如果该队列已满，则一直阻塞。
* offer: 向队列尾部插入一个元素，插入成功返回True。插入失败返回False。
获取元素：
* poll: 获取并移除队列的头元素，若队列为空，则返回null。
* take: 获取并移除队列的头元素，若队列为空，则一直阻塞。
* peek：获取但不移除队列的头元素，若队列为空，则返回null
队列状态状态：
* qsize：获取队列中当前元素数量
* maxsize：获取队列的最大容量
"""
def __init__(self, maxsize: int = None):
"""
init
:param maxsize: 队列的最大容量
"""
self.__queue = PriorityQueue(maxsize=maxsize)
def put(self, item, priority: int = 200) -> None:
"""
向队列尾部插入一个元素，如果该队列已满，则一直阻塞。
:param item:
:param priority: 优先级
:return:
"""
while True:
try:
self.__queue.put(PriorityEntry(priority, item))
break
except Exception as e:
logger.debug("put data failed error -> {0}".format(e))
time.sleep(0.5)
def offer(self, item, priority: int = 200) -> bool:
"""
向队列尾部插入一个元素，插入成功返回True。插入失败返回False。
:param item: 元素
:param priority: 优先级
:return:
"""
try:
self.__queue.put(PriorityEntry(priority, item), block=False)
return True
except Exception as e:
logger.debug("offer data failed error -> {0}".format(e))
return False
def poll(self):
"""
获取并移除队列的头元素，若队列为空，则返回null。
:return:
"""
try:
return self.__queue.get(block=False).data
except Exception as e:
logger.debug("poll data failed error -> {0}".format(e))
return None
def take(self):
"""
获取并移除队列的头元素，若队列为空，则一直阻塞。
:return:
"""
while True:
try:
return self.__queue.get().data
except Exception as e:
logger.debug("take data failed error -> {0}".format(e))
time.sleep(0.5)
def peek(self):
"""
获取但不移除队列的头元素，若队列为空，则返回null
:return:
"""
try:
return self.__queue.peek(block=False).data
except Exception as e:
logger.debug("peek data failed error -> {0}".format(e))
return None
def qsize(self) -> int:
"""
获取队列中当前元素数量
:return:
"""
return self.__queue.qsize()
def maxsize(self) -> int:
"""
获取队列的最大容量
:return:
"""
return self.__queue.maxsize
class AWSLogs(object):
ACTIVE = 1
EXHAUSTED = 2
WATCH_SLEEP = 2
def __init__(self, **kwargs):
self.connection_cls = kwargs.get('connection_cls', AWSConnection)
self.aws_region = kwargs.get('aws_region')
self.aws_access_key_id = kwargs.get('aws_access_key_id')
self.aws_secret_access_key = kwargs.get('aws_secret_access_key')
self.log_group_name = kwargs.get('log_group_name')
self.log_stream_name = kwargs.get('log_stream_name')
self.watch = kwargs.get('watch')
self.color_enabled = kwargs.get('color_enabled')
self.output_stream_enabled = kwargs.get('output_stream_enabled')
self.output_group_enabled = kwargs.get('output_group_enabled')
self.start = self.parse_datetime(kwargs.get('start'))
self.end = self.parse_datetime(kwargs.get('end'))
self.pool_size = max(kwargs.get('pool_size', 0), 10)
self.max_group_length = 0
self.max_stream_length = 0
self.publishers = []
self.events_queue = Queue()
self.raw_events_queue = PriorityQueue()
self.publishers_queue = PriorityQueue()
self.publishers = []
self.stream_status = {}
self.stream_max_timestamp = {}
self.connection = self.connection_cls(
self.aws_region,
aws_access_key_id=self.aws_access_key_id,
aws_secret_access_key=self.aws_secret_access_key
)
def _get_streams_from_patterns(self, log_group_pattern, log_stream_pattern):
"""Returns pairs of group, stream matching ``log_group_pattern`` and
``log_stream_pattern``."""
for group in self._get_groups_from_pattern(log_group_pattern):
for stream in self._get_streams_from_pattern(group,
log_stream_pattern):
yield group, stream
def _get_groups_from_pattern(self, pattern):
"""Returns groups matching ``pattern``."""
pattern = '.*' if pattern == 'ALL' else pattern
reg = re.compile('^{0}'.format(pattern))
for group in self.get_groups():
if re.match(reg, group):
yield group
def _get_streams_from_pattern(self, group, pattern):
"""Returns streams in ``group`` matching ``pattern``."""
pattern = '.*' if pattern == 'ALL' else pattern
reg = re.compile('^{0}'.format(pattern))
for stream in self.get_streams(group):
if re.match(reg, stream):
yield stream
def _publisher_queue_consumer(self):
"""Consume ``publishers_queue`` api calls, run them and publish log
events to ``raw_events_queue``. If ``nextForwardToken`` is present
register a new api call into ``publishers_queue`` using as weight
the timestamp of the latest event."""
while True:
try:
_, (log_group_name, log_stream_name, next_token) = self.publishers_queue.get(block=False)
except Empty:
if self.watch:
gevent.sleep(self.WATCH_SLEEP)
else:
break
response = self.connection.get_log_events(
next_token=next_token,
log_group_name=log_group_name,
log_stream_name=log_stream_name,
start_time=self.start,
end_time=self.end,
start_from_head=True
)
if not len(response['events']):
self.stream_status[(log_group_name, log_stream_name)] = self.EXHAUSTED
continue
self.stream_status[(log_group_name, log_stream_name)] = self.ACTIVE
for event in response['events']:
event['group'] = log_group_name
event['stream'] = log_stream_name
self.raw_events_queue.put((event['timestamp'], event))
self.stream_max_timestamp[(log_group_name, log_stream_name)] = event['timestamp']
if 'nextForwardToken' in response:
self.publishers_queue.put(
(response['events'][-1]['timestamp'],
(log_group_name, log_stream_name, response['nextForwardToken']))
)
def _get_min_timestamp(self):
"""Return the minimum timestamp available across all active streams."""
pending = [self.stream_max_timestamp[k] for k, v in self.stream_status.iteritems() if v != self.EXHAUSTED]
return min(pending) if pending else None
def _get_all_streams_exhausted(self):
"""Return if all streams are exhausted."""
return all((s == self.EXHAUSTED for s in self.stream_status.itervalues()))
def _raw_events_queue_consumer(self):
"""Consume events from ``raw_events_queue`` if all active streams
have already publish events up to the ``_get_min_timestamp`` and
register them in order into ``events_queue``."""
while True:
if self._get_all_streams_exhausted() and self.raw_events_queue.empty():
if self.watch:
gevent.sleep(self.WATCH_SLEEP)
continue
self.events_queue.put(NO_MORE_EVENTS)
break
try:
timestamp, line = self.raw_events_queue.peek(timeout=1)
except Empty:
continue
min_timestamp = self._get_min_timestamp()
if min_timestamp and min_timestamp < timestamp:
gevent.sleep(0.3)
continue
timestamp, line = self.raw_events_queue.get()
output = [line['message']]
if self.output_stream_enabled:
output.insert(
0,
self.color(
line['stream'].ljust(self.max_stream_length, ' '),
'cyan'
)
)
if self.output_group_enabled:
output.insert(
0,
self.color(
line['group'].ljust(self.max_group_length, ' '),
'green'
)
)
self.events_queue.put("{0}\n".format(' '.join(output)))
def _events_consumer(self):
"""Print events from ``events_queue`` as soon as they are available."""
while True:
event = self.events_queue.get(True)
if event == NO_MORE_EVENTS:
break
sys.stdout.write(event)
sys.stdout.flush()
def list_logs(self):
self.register_publishers()
pool = Pool(size=self.pool_size)
pool.spawn(self._raw_events_queue_consumer)
pool.spawn(self._events_consumer)
if self.watch:
pool.spawn(self.register_publishers_periodically)
for i in xrange(self.pool_size):
pool.spawn(self._publisher_queue_consumer)
pool.join()
def register_publishers(self):
"""Register publishers into ``publishers_queue``."""
for group, stream in self._get_streams_from_patterns(self.log_group_name, self.log_stream_name):
if (group, stream) in self.publishers:
continue
self.publishers.append((group, stream))
self.max_group_length = max(self.max_group_length, len(group))
self.max_stream_length = max(self.max_stream_length, len(stream))
self.publishers_queue.put((0, (group, stream, None)))
self.stream_status[(group, stream)] = self.ACTIVE
self.stream_max_timestamp[(group, stream)] = -1
def register_publishers_periodically(self):
while True:
self.register_publishers()
gevent.sleep(2)
def list_groups(self):
"""Lists available CloudWatch logs groups"""
for group in self.get_groups():
print group
def list_streams(self, *args, **kwargs):
"""Lists available CloudWatch logs streams in ``log_group_name``."""
for stream in self.get_streams(*args, **kwargs):
print stream
def get_groups(self):
"""Returns available CloudWatch logs groups"""
next_token = None
while True:
response = self.connection.describe_log_groups(next_token=next_token)
for group in response.get('logGroups', []):
yield group['logGroupName']
if 'nextToken' in response:
next_token = response['nextToken']
else:
break
def get_streams(self, log_group_name=None):
"""Returns available CloudWatch logs streams in ``log_group_name``."""
log_group_name = log_group_name or self.log_group_name
next_token = None
while True:
response = self.connection.describe_log_streams(
log_group_name=log_group_name,
next_token=next_token
)
for stream in response.get('logStreams', []):
yield stream['logStreamName']
if 'nextToken' in response:
next_token = response['nextToken']
else:
break
def color(self, text, color):
"""Returns coloured version of ``text`` if ``color_enabled``."""
if self.color_enabled:
return colored(text, color)
return text
def parse_datetime(self, datetime_text):
"""Parse ``datetime_text`` into a ``datetime``."""
if not datetime_text:
return None
ago_match = re.match(r'(\d+)\s?(m|minute|minutes|h|hour|hours|d|day|days|w|weeks|weeks)(?: ago)?', datetime_text)
if ago_match:
amount, unit = ago_match.groups()
amount = int(amount)
unit = {'m': 60, 'h': 3600, 'd': 86400, 'w': 604800}[unit[0]]
date = datetime.now() + timedelta(seconds=unit * amount * -1)
else:
try:
date = parse(datetime_text)
except ValueError:
raise exceptions.UnknownDateError(datetime_text)
return int(date.strftime("%s")) * 1000
class AWSLogs(object):
ACTIVE = 1
EXHAUSTED = 2
WATCH_SLEEP = 2
def __init__(self, **kwargs):
self.connection_cls = kwargs.get('connection_cls', AWSConnection)
self.aws_region = kwargs.get('aws_region')
self.aws_access_key_id = kwargs.get('aws_access_key_id')
self.aws_secret_access_key = kwargs.get('aws_secret_access_key')
self.log_group_name = kwargs.get('log_group_name')
self.log_stream_name = kwargs.get('log_stream_name')
self.watch = kwargs.get('watch')
self.color_enabled = kwargs.get('color_enabled')
self.output_stream_enabled = kwargs.get('output_stream_enabled')
self.output_group_enabled = kwargs.get('output_group_enabled')
self.start = self.parse_datetime(kwargs.get('start'))
self.end = self.parse_datetime(kwargs.get('end'))
self.pool_size = max(kwargs.get('pool_size', 0), 10)
self.max_group_length = 0
self.max_stream_length = 0
self.publishers = []
self.events_queue = Queue()
self.raw_events_queue = PriorityQueue()
self.publishers_queue = PriorityQueue()
self.publishers = []
self.stream_status = {}
self.stream_max_timestamp = {}
self.connection = self.connection_cls(
self.aws_region,
aws_access_key_id=self.aws_access_key_id,
aws_secret_access_key=self.aws_secret_access_key)
def _get_streams_from_patterns(self, log_group_pattern,
log_stream_pattern):
"""Returns pairs of group, stream matching ``log_group_pattern`` and
``log_stream_pattern``."""
for group in self._get_groups_from_pattern(log_group_pattern):
for stream in self._get_streams_from_pattern(
group, log_stream_pattern):
yield group, stream
def _get_groups_from_pattern(self, pattern):
"""Returns groups matching ``pattern``."""
pattern = '.*' if pattern == 'ALL' else pattern
reg = re.compile('^{0}'.format(pattern))
for group in self.get_groups():
if re.match(reg, group):
yield group
def _get_streams_from_pattern(self, group, pattern):
"""Returns streams in ``group`` matching ``pattern``."""
pattern = '.*' if pattern == 'ALL' else pattern
reg = re.compile('^{0}'.format(pattern))
for stream in self.get_streams(group):
if re.match(reg, stream):
yield stream
def _publisher_queue_consumer(self):
"""Consume ``publishers_queue`` api calls, run them and publish log
events to ``raw_events_queue``. If ``nextForwardToken`` is present
register a new api call into ``publishers_queue`` using as weight
the timestamp of the latest event."""
while True:
try:
_, (log_group_name, log_stream_name,
next_token) = self.publishers_queue.get(block=False)
except Empty:
if self.watch:
gevent.sleep(self.WATCH_SLEEP)
continue
else:
break
response = self.connection.get_log_events(
next_token=next_token,
log_group_name=log_group_name,
log_stream_name=log_stream_name,
start_time=self.start,
end_time=self.end,
start_from_head=True)
if not len(response['events']):
self.stream_status[(log_group_name,
log_stream_name)] = self.EXHAUSTED
continue
self.stream_status[(log_group_name, log_stream_name)] = self.ACTIVE
for event in response['events']:
event['group'] = log_group_name
event['stream'] = log_stream_name
self.raw_events_queue.put((event['timestamp'], event))
self.stream_max_timestamp[(
log_group_name, log_stream_name)] = event['timestamp']
if 'nextForwardToken' in response:
self.publishers_queue.put((response['events'][-1]['timestamp'],
(log_group_name, log_stream_name,
response['nextForwardToken'])))
def _get_min_timestamp(self):
"""Return the minimum timestamp available across all active streams."""
pending = [
self.stream_max_timestamp[k]
for k, v in self.stream_status.iteritems() if v != self.EXHAUSTED
]
return min(pending) if pending else None
def _get_all_streams_exhausted(self):
"""Return if all streams are exhausted."""
return all(
(s == self.EXHAUSTED for s in self.stream_status.itervalues()))
def _raw_events_queue_consumer(self):
"""Consume events from ``raw_events_queue`` if all active streams
have already publish events up to the ``_get_min_timestamp`` and
register them in order into ``events_queue``."""
while True:
if self._get_all_streams_exhausted(
) and self.raw_events_queue.empty():
if self.watch:
gevent.sleep(self.WATCH_SLEEP)
continue
self.events_queue.put(NO_MORE_EVENTS)
break
try:
timestamp, line = self.raw_events_queue.peek(timeout=1)
except Empty:
continue
min_timestamp = self._get_min_timestamp()
if min_timestamp and min_timestamp < timestamp:
gevent.sleep(0.3)
continue
timestamp, line = self.raw_events_queue.get()
output = [line['message']]
if self.output_stream_enabled:
output.insert(
0,
self.color(
line['stream'].ljust(self.max_stream_length, ' '),
'cyan'))
if self.output_group_enabled:
output.insert(
0,
self.color(line['group'].ljust(self.max_group_length, ' '),
'green'))
self.events_queue.put("{0}\n".format(' '.join(output)))
def _events_consumer(self):
"""Print events from ``events_queue`` as soon as they are available."""
while True:
event = self.events_queue.get(True)
if event == NO_MORE_EVENTS:
break
sys.stdout.write(event)
sys.stdout.flush()
def list_logs(self):
self.register_publishers()
pool = Pool(size=self.pool_size)
pool.spawn(self._raw_events_queue_consumer)
pool.spawn(self._events_consumer)
if self.watch:
pool.spawn(self.register_publishers_periodically)
for i in xrange(self.pool_size):
pool.spawn(self._publisher_queue_consumer)
pool.join()
def register_publishers(self):
"""Register publishers into ``publishers_queue``."""
for group, stream in self._get_streams_from_patterns(
self.log_group_name, self.log_stream_name):
if (group, stream) in self.publishers:
continue
self.publishers.append((group, stream))
self.max_group_length = max(self.max_group_length, len(group))
self.max_stream_length = max(self.max_stream_length, len(stream))
self.publishers_queue.put((0, (group, stream, None)))
self.stream_status[(group, stream)] = self.ACTIVE
self.stream_max_timestamp[(group, stream)] = -1
def register_publishers_periodically(self):
while True:
self.register_publishers()
gevent.sleep(2)
def list_groups(self):
"""Lists available CloudWatch logs groups"""
for group in self.get_groups():
print group
def list_streams(self, *args, **kwargs):
"""Lists available CloudWatch logs streams in ``log_group_name``."""
for stream in self.get_streams(*args, **kwargs):
print stream
def get_groups(self):
"""Returns available CloudWatch logs groups"""
next_token = None
while True:
response = self.connection.describe_log_groups(
next_token=next_token)
for group in response.get('logGroups', []):
yield group['logGroupName']
if 'nextToken' in response:
next_token = response['nextToken']
else:
break
def get_streams(self, log_group_name=None):
"""Returns available CloudWatch logs streams in ``log_group_name``."""
log_group_name = log_group_name or self.log_group_name
next_token = None
window_start = self.start or 0
window_end = self.end or sys.maxint
while True:
response = self.connection.describe_log_streams(
log_group_name=log_group_name, next_token=next_token)
for stream in response.get('logStreams', []):
if max(stream['firstEventTimestamp'], window_start) <= \
min(stream['lastEventTimestamp'], window_end):
yield stream['logStreamName']
if 'nextToken' in response:
next_token = response['nextToken']
else:
break
def color(self, text, color):
"""Returns coloured version of ``text`` if ``color_enabled``."""
if self.color_enabled:
return colored(text, color)
return text
def parse_datetime(self, datetime_text):
"""Parse ``datetime_text`` into a ``datetime``."""
if not datetime_text:
return None
ago_match = re.match(
r'(\d+)\s?(m|minute|minutes|h|hour|hours|d|day|days|w|weeks|weeks)(?: ago)?',
datetime_text)
if ago_match:
amount, unit = ago_match.groups()
amount = int(amount)
unit = {'m': 60, 'h': 3600, 'd': 86400, 'w': 604800}[unit[0]]
date = datetime.now() + timedelta(seconds=unit * amount * -1)
else:
try:
date = parse(datetime_text)
except ValueError:
raise exceptions.UnknownDateError(datetime_text)
return int(date.strftime("%s")) * 1000
