def test_5_integration_stomp_1_1_heartbeat(self):
version = StompSpec.VERSION_1_1
if BROKER == 'apollo':
print "Broker %s doesn't properly support heart-beating. Skipping test." % BROKER
return
port = 61612 if (BROKER == 'activemq') else PORT # stomp+nio on 61613 does not work properly, so use stomp on 61612
client = Stomp(self.getConfig(StompSpec.VERSION_1_1, port))
self.assertEquals(client.lastReceived, None)
self.assertEquals(client.lastSent, None)
heartBeatPeriod = 100
try:
client.connect(host=VIRTUALHOST, heartBeats=(heartBeatPeriod, heartBeatPeriod), versions=[version])
except StompProtocolError as e:
print 'Broker does not support STOMP protocol %s. Skipping this test case. [%s]' % (e, version)
return
self.assertTrue((time.time() - client.lastReceived) < 0.1)
if not (client.serverHeartBeat and client.clientHeartBeat):
print 'broker does not support heart-beating. disconnecting ...'
client.disconnect()
client.close()
return
serverHeartBeatInSeconds = client.serverHeartBeat / 1000.0
clientHeartBeatInSeconds = client.clientHeartBeat / 1000.0
start = time.time()
while (time.time() - start) < (2.5 * max(serverHeartBeatInSeconds, clientHeartBeatInSeconds)):
time.sleep(0.5 * min(serverHeartBeatInSeconds, clientHeartBeatInSeconds))
client.canRead(0)
self.assertTrue((time.time() - client.lastReceived) < (2.0 * serverHeartBeatInSeconds))
if (time.time() - client.lastSent) > (0.5 * clientHeartBeatInSeconds):
client.beat()
self.assertTrue((time.time() - client.lastSent) < 0.1)
start = time.time()
try:
while not client.canRead(0.5 * clientHeartBeatInSeconds):
pass
except StompConnectionError:
self.assertTrue((time.time() - start) < (3.0 * clientHeartBeatInSeconds))
self.assertTrue((time.time() - client.lastReceived) < (2.0 * serverHeartBeatInSeconds))
self.assertTrue((time.time() - client.lastSent) > clientHeartBeatInSeconds)
else:
raise
client.close()
def test_5_integration_stomp_1_1_heartbeat(self):
version = StompSpec.VERSION_1_1
port = 61612 if (BROKER == 'activemq') else PORT # stomp+nio on 61613 does not work properly, so use stomp on 61612
client = Stomp(self.getConfig(StompSpec.VERSION_1_1, port))
self.assertEquals(client.lastReceived, None)
self.assertEquals(client.lastSent, None)
heartBeatPeriod = 100
try:
client.connect(host=VIRTUALHOST, heartBeats=(heartBeatPeriod, heartBeatPeriod), versions=[version])
except StompProtocolError as e:
print 'Broker does not support STOMP protocol %s. Skipping this test case. [%s]' % (e, version)
return
self.assertTrue((time.time() - client.lastReceived) < 0.1)
if not (client.serverHeartBeat and client.clientHeartBeat):
print 'broker does not support heart-beating. disconnecting ...'
client.disconnect()
client.close()
return
serverHeartBeatInSeconds = client.serverHeartBeat / 1000.0
clientHeartBeatInSeconds = client.clientHeartBeat / 1000.0
start = time.time()
while (time.time() - start) < (2.5 * max(serverHeartBeatInSeconds, clientHeartBeatInSeconds)):
time.sleep(0.5 * min(serverHeartBeatInSeconds, clientHeartBeatInSeconds))
client.canRead(0)
self.assertTrue((time.time() - client.lastReceived) < (2.0 * serverHeartBeatInSeconds))
if (time.time() - client.lastSent) > (0.5 * clientHeartBeatInSeconds):
client.beat()
self.assertTrue((time.time() - client.lastSent) < 0.1)
start = time.time()
try:
while not client.canRead(0.5 * clientHeartBeatInSeconds):
pass
if client.receiveFrame().command == StompSpec.ERROR:
raise StompProtocolError()
except (StompConnectionError, StompProtocolError):
self.assertTrue((time.time() - start) < (3.0 * clientHeartBeatInSeconds))
self.assertTrue((time.time() - client.lastReceived) < (2.0 * serverHeartBeatInSeconds))
self.assertTrue((time.time() - client.lastSent) > clientHeartBeatInSeconds)
else:
raise
client.close()
def test_5_integration_stomp_1_1_heartbeat(self):
version = StompSpec.VERSION_1_1
client = Stomp(self.getConfig(StompSpec.VERSION_1_1))
self.assertEqual(client.lastReceived, None)
self.assertEqual(client.lastSent, None)
heartBeatPeriod = 100
try:
client.connect(host=VIRTUALHOST, heartBeats=(heartBeatPeriod, heartBeatPeriod), versions=[version])
except StompProtocolError as e:
print('Broker does not support STOMP protocol %s. Skipping this test case. [%s]' % (e, version))
return
self.assertTrue((time.time() - client.lastReceived) < 0.1)
if not (client.serverHeartBeat and client.clientHeartBeat):
print('broker does not support heart-beating. disconnecting ...')
client.disconnect()
client.close()
return
serverHeartBeatInSeconds = client.serverHeartBeat / 1000.0
clientHeartBeatInSeconds = client.clientHeartBeat / 1000.0
start = time.time()
while (time.time() - start) < (2.5 * max(serverHeartBeatInSeconds, clientHeartBeatInSeconds)):
time.sleep(0.5 * min(serverHeartBeatInSeconds, clientHeartBeatInSeconds))
client.canRead(0)
self.assertTrue((time.time() - client.lastReceived) < (2.0 * serverHeartBeatInSeconds))
if (time.time() - client.lastSent) > (0.5 * clientHeartBeatInSeconds):
client.beat()
self.assertTrue((time.time() - client.lastSent) < 0.1)
start = time.time()
try:
while not client.canRead(0.5 * clientHeartBeatInSeconds):
pass
if client.receiveFrame().command == StompSpec.ERROR:
raise StompProtocolError()
except (StompConnectionError, StompProtocolError):
self.assertTrue((time.time() - start) < (3.0 * clientHeartBeatInSeconds))
self.assertTrue((time.time() - client.lastReceived) < (2.0 * serverHeartBeatInSeconds))
self.assertTrue((time.time() - client.lastSent) > clientHeartBeatInSeconds)
else:
raise
client.close()
print "--------------------------------------------------------------------"
print "state : ", client.session.state
print "client HB : ", client.session.clientHeartBeat
print "server HB : ", client.session.serverHeartBeat
print "server : ", client.session.server
print "id : ", client.session.id
print "lastSent : ", toTime(client.session.lastSent)
print "lastReceived : ", toTime(client.session.lastReceived)
start = time.time()
elapsed = lambda t=None: (t or time.time()) - start
times = lambda: 'elapsed: %.2f, last received: %.2f, last sent: %.2f' % (
elapsed(), elapsed(client.lastReceived), elapsed(client.lastSent))
for x in range(0, 7):
client.beat()
print times()
time.sleep(1)
# while elapsed() < 2 * client.clientHeartBeat / 1000.0:
# client.canRead(0.8 * client.serverHeartBeat / 1000.0) # poll server heart-beats
# client.beat() # send client heart-beats
# print times()
# client.canRead()
# print times()
client.disconnect()
sys.exit(0)
if __name__ == '__main__':
client = Stomp(CONFIG)
client.connect(connectedTimeout=4, heartBeats=(1000,0))
print "--------------------------------------------------------------------"
print "state : ", client.session.state
print "client HB : ", client.session.clientHeartBeat
print "server HB : ", client.session.serverHeartBeat
print "server : ", client.session.server
print "id : ", client.session.id
print "lastSent : ", toTime(client.session.lastSent)
print "lastReceived : ", toTime(client.session.lastReceived)
start = time.time()
elapsed = lambda t = None: (t or time.time()) - start
times = lambda: 'elapsed: %.2f, last received: %.2f, last sent: %.2f' % (
elapsed(), elapsed(client.lastReceived), elapsed(client.lastSent)
)
for x in range(0, 4):
client.beat()
print times()
time.sleep(1)
client.disconnect()
sys.exit(0)
class StompClient(BaseComponent):
""" Send and Receive messages from a STOMP queue """
channel = "stomp"
def init(self, host, port, username=None, password=None,
connect_timeout=3, connected_timeout=3,
version=StompSpec.VERSION_1_2, accept_versions=["1.0", "1.1", "1.2"],
heartbeats=(0, 0), ssl_context=None,
use_ssl=True,
key_file=None,
cert_file=None,
ca_certs=None,
ssl_version=ssl.PROTOCOL_SSLv23,
key_file_password=None,
proxy_host=None,
proxy_port=None,
proxy_user=None,
proxy_password=None,
channel=channel):
""" Initialize StompClient. Called after __init__ """
self.channel = channel
if proxy_host:
LOG.info("Connect to %s:%s through proxy %s:%d", host, port, proxy_host, proxy_port)
else:
LOG.info("Connect to %s:%s", host, port)
if use_ssl and not ssl_context:
ssl_params = dict(key_file=key_file,
cert_file=cert_file,
ca_certs=ca_certs,
ssl_version=ssl_version,
password=key_file_password)
LOG.info("Request to use old-style socket wrapper: %s", ssl_params)
ssl_context = ssl_params
if use_ssl:
uri = "ssl://%s:%s" % (host, port)
else:
uri = "tcp://%s:%s" % (host, port)
# Configure failover options so it only tries to connect once
self._stomp_server = "failover:(%s)?maxReconnectAttempts=1,startupMaxReconnectAttempts=1" % uri
self._stomp_config = StompConfig(uri=self._stomp_server, sslContext=ssl_context,
version=version,
login=username,
passcode=password)
self._heartbeats = heartbeats
self._accept_versions = accept_versions
self._connect_timeout = connect_timeout
self._connected_timeout = connected_timeout
Stomp._transportFactory = EnhancedStompFrameTransport
Stomp._transportFactory.proxy_host = proxy_host
Stomp._transportFactory.proxy_port = proxy_port
Stomp._transportFactory.proxy_user = proxy_user
Stomp._transportFactory.proxy_password = proxy_password
self._client = Stomp(self._stomp_config)
self._subscribed = {}
self.server_heartbeat = None
self.client_heartbeat = None
self.ALLOWANCE = 2 # multiplier for heartbeat timeouts
@property
def connected(self):
if self._client.session:
return self._client.session.state == StompSession.CONNECTED
else:
return False
@property
def subscribed(self):
return self._subscribed.keys()
@property
def stomp_logger(self):
return LOG_CATEGORY
@handler("disconnect")
def _disconnect(self, receipt=None):
if self.connected:
self._client.disconnect(receipt=receipt)
self._client.close(flush=True)
self.fire(disconnected(reconnect=False))
self._subscribed = {}
return "disconnected"
def start_heartbeats(self):
LOG.info("Client HB: %s Server HB: %s", self._client.clientHeartBeat, self._client.serverHeartBeat)
if self._client.clientHeartBeat:
if self.client_heartbeat:
# Timer already exists, just reset it
self.client_heartbeat.reset()
else:
LOG.info("Client will send heartbeats to server")
# Send heartbeats at 80% of agreed rate
self.client_heartbeat = Timer((self._client.clientHeartBeat / 1000.0) * 0.8,
client_heartbeat(), persist=True)
self.client_heartbeat.register(self)
else:
LOG.info("No Client heartbeats will be sent")
if self._client.serverHeartBeat:
if self.server_heartbeat:
# Timer already exists, just reset it
self.server_heartbeat.reset()
else:
LOG.info("Requested heartbeats from server.")
# Allow a grace period on server heartbeats
self.server_heartbeat = Timer((self._client.serverHeartBeat / 1000.0) * self.ALLOWANCE,
server_heartbeat(), persist=True)
self.server_heartbeat.register(self)
else:
LOG.info("Expecting no heartbeats from Server")
@handler("connect")
def connect(self, event, host=None, *args, **kwargs):
""" connect to Stomp server """
LOG.info("Connect to Stomp...")
try:
self._client.connect(heartBeats=self._heartbeats,
host=host,
versions=self._accept_versions,
connectTimeout=self._connect_timeout,
connectedTimeout=self._connected_timeout)
LOG.info("State after Connection Attempt: %s", self._client.session.state)
if self.connected:
LOG.info("Connected to %s", self._stomp_server)
self.fire(connected())
self.start_heartbeats()
return "success"
except StompConnectionError:
LOG.debug(traceback.format_exc())
self.fire(connection_failed(self._stomp_server))
event.success = False
return "fail"
@handler("server_heartbeat")
def check_server_heartbeat(self, event):
""" Confirm that heartbeat from server hasn't timed out """
now = time.time()
last = self._client.lastReceived or 0
if last:
elapsed = now - last
else:
elapsed = -1
LOG.debug("Last received data %d seconds ago", elapsed)
if ((self._client.serverHeartBeat / 1000.0) * self.ALLOWANCE + last) < now:
LOG.error("Server heartbeat timeout. %d seconds since last heartbeat. Disconnecting.", elapsed)
event.success = False
self.fire(heartbeat_timeout())
if self.connected:
self._client.disconnect()
# TODO: Try to auto-reconnect?
@handler("client_heartbeat")
def send_heartbeat(self, event):
if self.connected:
LOG.debug("Sending heartbeat")
try:
self._client.beat()
except StompConnectionError:
event.success = False
self.fire(disconnected())
@handler("generate_events")
def generate_events(self, event):
if not self.connected:
return
try:
if self._client.canRead(1):
frame = self._client.receiveFrame()
LOG.debug("Recieved frame %s", frame)
self.fire(message(frame))
except StompConnectionError:
self.fire(disconnected())
@handler("send")
def send(self, event, destination, body, headers=None, receipt=None):
LOG.debug("send()")
if not self.connected:
LOG.error("Can't send when Stomp is disconnected")
self.fire(on_stomp_error(None, Exception("Message send attempted with stomp disconnected")))
event.success = False
return
try:
self._client.send(destination, body=body.encode('utf-8'), headers=headers, receipt=receipt)
LOG.debug("Message sent")
except StompConnectionError as err:
event.success = False
self.fire(disconnected())
except StompError as err:
LOG.error("Error sending ack")
event.success = False
self.fire(on_stomp_error(None, err))
@handler("subscribe")
def _subscribe(self, event, destination, ack=ACK_CLIENT_INDIVIDUAL):
if ack not in ACK_MODES:
raise ValueError("Invalid client ack mode specified")
LOG.info("Subscribe to message destination %s", destination)
try:
# Set ID to match destination name for easy reference later
frame, token = self._client.subscribe(destination,
headers={StompSpec.ACK_HEADER: ack,
'id': destination})
self._subscribed[destination] = token
except StompConnectionError as err:
event.success = False
self.fire(disconnected())
except StompError as err:
event.success = False
LOG.debug(traceback.format_exc())
self.fire(on_stomp_error(None, err))
@handler("unsubscribe")
def _unsubscribe(self, event, destination):
if destination not in self._subscribed:
LOG.error("Unsubscribe Request Ignored. Not subscribed to %s", destination)
return
try:
token = self._subscribed.pop(destination)
frame = self._client.unsubscribe(token)
LOG.debug("Unsubscribed: %s", frame)
except StompConnectionError as err:
event.success = False
self.fire(disconnected())
except StompError as err:
LOG.error("Error sending ack")
event.success = False
self.fire(on_stomp_error(frame, err))
@handler("message")
def on_message(self, event, headers, message):
LOG.info("Stomp message received")
@handler("ack")
def ack_frame(self, event, frame):
LOG.debug("ack_frame()")
try:
self._client.ack(frame)
LOG.debug("Ack Sent")
except StompConnectionError as err:
LOG.error("Error sending ack")
event.success = False
self.fire(disconnected())
except StompError as err:
LOG.error("Error sending ack")
event.success = False
self.fire(on_stomp_error(frame, err))
def get_subscription(self, frame):
""" Get subscription from frame """
LOG.info(self._subscribed)
_, token = self._client.message(frame)
return self._subscribed[token]
class StompClient(BaseComponent):
channel = "stomp"
def init(
self,
host,
port,
username=None,
password=None,
connect_timeout=3,
connected_timeout=3,
version=StompSpec.VERSION_1_2,
accept_versions=["1.0", "1.1", "1.2"],
heartbeats=(0, 0),
ssl_context=None,
use_ssl=True,
key_file=None,
cert_file=None,
ca_certs=None,
ssl_version=ssl.PROTOCOL_SSLv23, # means 'latest available'
key_file_password=None,
proxy_host=None,
proxy_port=None,
proxy_user=None,
proxy_password=None,
channel=channel):
""" Initialize StompClient. Called after __init__ """
self.channel = channel
if proxy_host:
LOG.info("Connect to %s:%s through proxy %s:%d", host, port,
proxy_host, proxy_port)
else:
LOG.info("Connect to %s:%s", host, port)
if use_ssl and not ssl_context:
ssl_params = dict(key_file=key_file,
cert_file=cert_file,
ca_certs=ca_certs,
ssl_version=ssl_version,
password=key_file_password)
LOG.info("Request to use old-style socket wrapper: %s", ssl_params)
ssl_context = ssl_params
if use_ssl:
uri = "ssl://%s:%s" % (host, port)
else:
uri = "tcp://%s:%s" % (host, port)
# Configure failover options so it only tries to connect once
self._stomp_server = "failover:(%s)?maxReconnectAttempts=1,startupMaxReconnectAttempts=1" % uri
self._stomp_config = StompConfig(uri=self._stomp_server,
sslContext=ssl_context,
version=version,
login=username,
passcode=password)
self._heartbeats = heartbeats
self._accept_versions = accept_versions
self._connect_timeout = connect_timeout
self._connected_timeout = connected_timeout
Stomp._transportFactory = EnhancedStompFrameTransport
Stomp._transportFactory.proxy_host = proxy_host
Stomp._transportFactory.proxy_port = proxy_port
Stomp._transportFactory.proxy_user = proxy_user
Stomp._transportFactory.proxy_password = proxy_password
self._client = Stomp(self._stomp_config)
self._subscribed = {}
self.server_heartbeat = None
self.client_heartbeat = None
self.last_heartbeat = 0
self.ALLOWANCE = 2 # multiplier for heartbeat timeouts
@property
def connected(self):
if self._client.session:
return self._client.session.state == StompSession.CONNECTED
else:
return False
@property
def socket_connected(self):
try:
if self._client._transport:
return True
except:
pass
return False
@property
def subscribed(self):
return self._subscribed.keys()
@property
def stomp_logger(self):
return LOG_CATEGORY
@handler("Disconnect")
def _disconnect(self, receipt=None, flush=True, reconnect=False):
try:
if flush:
self._subscribed = {}
if self.connected:
self._client.disconnect(receipt=receipt)
except Exception as e:
LOG.error("Failed to disconnect client")
try:
self.fire(Disconnected(reconnect=reconnect))
self._client.close(flush=flush)
except Exception as e:
LOG.error("Failed to close client connection")
return "disconnected"
def start_heartbeats(self):
LOG.info("Client HB: %s Server HB: %s", self._client.clientHeartBeat,
self._client.serverHeartBeat)
if self._client.clientHeartBeat:
if self.client_heartbeat:
# Timer already exists, just reset it
self.client_heartbeat.reset()
else:
LOG.info("Client will send heartbeats to server")
# Send heartbeats at 80% of agreed rate
self.client_heartbeat = Timer(
(self._client.clientHeartBeat / 1000.0) * 0.8,
ClientHeartbeat(),
persist=True)
self.client_heartbeat.register(self)
else:
LOG.info("No Client heartbeats will be sent")
if self._client.serverHeartBeat:
if self.server_heartbeat:
# Timer already exists, just reset it
self.server_heartbeat.reset()
else:
LOG.info("Requested heartbeats from server.")
# Allow a grace period on server heartbeats
self.server_heartbeat = Timer(
(self._client.serverHeartBeat / 1000.0) * self.ALLOWANCE,
ServerHeartbeat(),
persist=True)
self.server_heartbeat.register(self)
else:
LOG.info("Expecting no heartbeats from Server")
@handler("Connect")
def connect(self, event, host=None, *args, **kwargs):
""" connect to Stomp server """
LOG.info("Connect to Stomp...")
try:
self._client.connect(heartBeats=self._heartbeats,
host=host,
versions=self._accept_versions,
connectTimeout=self._connect_timeout,
connectedTimeout=self._connected_timeout)
LOG.debug("State after Connection Attempt: %s",
self._client.session.state)
if self.connected:
LOG.info("Connected to %s", self._stomp_server)
self.fire(Connected())
self.start_heartbeats()
return "success"
except StompConnectionError as err:
LOG.debug(traceback.format_exc())
self.fire(ConnectionFailed(self._stomp_server))
event.success = False
return "fail"
@handler("ServerHeartbeat")
def check_server_heartbeat(self, event):
""" Confirm that heartbeat from server hasn't timed out """
now = time.time()
self.last_heartbeat = self._client.lastReceived or self.last_heartbeat
if self.last_heartbeat:
elapsed = now - self.last_heartbeat
else:
elapsed = -1
if ((self._client.serverHeartBeat / 1000.0) * self.ALLOWANCE +
self.last_heartbeat) < now:
LOG.error(
"Server heartbeat timeout. %d seconds since last heartbeat.",
elapsed)
event.success = False
self.fire(HeartbeatTimeout())
@handler("ClientHeartbeat")
def send_heartbeat(self, event):
if self.connected:
LOG.debug("Sending heartbeat")
try:
self._client.beat()
except (StompConnectionError, StompError) as err:
event.success = False
self.fire(OnStompError(None, err))
@handler("generate_events")
def generate_events(self, event):
event.reduce_time_left(0.1)
if not self.connected:
return
try:
if self._client.canRead(0):
frame = self._client.receiveFrame()
LOG.debug("Recieved frame %s", frame)
if frame.command == StompSpec.ERROR:
self.fire(OnStompError(frame, None))
else:
self.fire(Message(frame))
except (StompConnectionError, StompError) as err:
LOG.error("Failed attempt to generate events.")
self.fire(OnStompError(None, err))
@handler("Send")
def send(self, event, destination, body, headers=None, receipt=None):
LOG.debug("send()")
try:
self._client.send(destination,
body=body.encode('utf-8'),
headers=headers,
receipt=receipt)
LOG.debug("Message sent")
except (StompConnectionError, StompError) as err:
LOG.error("Error sending frame")
event.success = False
self.fire(OnStompError(None, err))
raise # To fire Send_failure event
@handler("Subscribe")
def _subscribe(self,
event,
destination,
additional_headers=None,
ack=ACK_CLIENT_INDIVIDUAL):
if ack not in ACK_MODES:
raise ValueError("Invalid client ack mode specified")
if destination in self._client.session._subscriptions:
LOG.debug("Ignoring subscribe request to %s. Already subscribed.",
destination)
LOG.info("Subscribe to message destination %s", destination)
try:
headers = {StompSpec.ACK_HEADER: ack, 'id': destination}
if additional_headers:
headers.update(additional_headers)
# Set ID to match destination name for easy reference later
frame, token = self._client.subscribe(destination, headers)
self._subscribed[destination] = token
except (StompConnectionError, StompError) as err:
LOG.error("Failed to subscribe to queue.")
event.success = False
LOG.debug(traceback.format_exc())
self.fire(OnStompError(None, err))
@handler("Unsubscribe")
def _unsubscribe(self, event, destination):
if destination not in self._subscribed:
LOG.error("Unsubscribe Request Ignored. Not subscribed to %s",
destination)
return
try:
token = self._subscribed.pop(destination)
frame = self._client.unsubscribe(token)
LOG.debug("Unsubscribed: %s", frame)
except (StompConnectionError, StompError) as err:
event.success = False
LOG.error("Unsubscribe Failed.")
self.fire(OnStompError(frame, err))
@handler("Message")
def on_message(self, event, headers, message):
LOG.debug("Stomp message received")
@handler("Ack")
def ack_frame(self, event, frame):
LOG.debug("ack_frame()")
try:
self._client.ack(frame)
LOG.debug("Ack Sent")
except (StompConnectionError, StompError) as err:
LOG.error("Error sending ack")
event.success = False
self.fire(OnStompError(frame, err))
raise # To fire Ack_failure event
def get_subscription(self, frame):
""" Get subscription from frame """
_, token = self._client.message(frame)
return self._subscribed[token]
class client_activemq():
def __init__(self, worker_threads=2):
self.log = logging.getLogger('client_activemq')
self.log.debug('Initializing client_activemq')
self.host = '127.0.0.1' #manually set here until there is a better place
self.port = 61613 #manually set here until there is a better place
self.worker_threads = worker_threads
self.client = None
self.connection_issue = True
self.continue_running = True
self.subscriptions = {}
self.outbound_msg_queue = []
self.outbound_msg_queue_lazy = []
self.threads = []
self.work_queue = Queue.Queue()
connection_handler = threading.Thread(target=self.connection_handler)
connection_handler.daemon = True
connection_handler.start()
send_event_hopeful_thread = threading.Thread(
target=self.send_event_hopeful_thread)
send_event_hopeful_thread.daemon = True
send_event_hopeful_thread.start()
send_event_lazy_thread = threading.Thread(
target=self.send_event_lazy_thread)
send_event_lazy_thread.daemon = True
send_event_lazy_thread.start()
publish_loop = threading.Thread(target=self.publish_loop)
publish_loop.daemon = True
publish_loop.start()
def init_connection(self):
if (self.client != None and self.client.session.state == 'connected'):
self.log.error('Re-init connection')
try:
self.client.disconnect()
except:
pass
config = StompConfig('tcp://%s:%s' % (self.host, self.port),
version=StompSpec.VERSION_1_1,
check=True)
self.client = Stomp(config)
self.client.connect(heartBeats=(30000, 0),
connectTimeout=1,
connectedTimeout=1)
def build_worker_pool(self, capacity):
for thread in self.threads:
if thread.is_alive() == False:
self.threads.remove(thread)
while len(self.threads) < capacity:
t = threading.Thread(target=self.worker, args=(self.work_queue, ))
t.daemon = True
t.start()
self.threads.append(t)
def connection_handler(self):
#This func will just try to reconnect repeatedly in a thread if we're flagged as having an issue.
while (True):
if (self.connection_issue == True):
try:
self.init_connection()
self.connection_issue = False
time.sleep(0.1)
for subscription in self.subscriptions:
self.log.info('Re-subscribing upon reconnection: %s' %
subscription)
self.subscribe(
subscription,
self.subscriptions[subscription]['callback_class'],
self.subscriptions[subscription]['callback'], True,
self.subscriptions[subscription]['selector'])
except Exception as e:
self.log.critical('Except: %s' % e)
else:
try:
self.client.beat()
except:
self.log.warning('Failed to heartbeat?')
self.build_worker_pool(self.worker_threads)
time.sleep(10)
def subscribe(self,
queue,
callback_class,
callback,
resub=False,
selector=None):
#This needs to exist so we can keep track of what subs we have and re-sub on reconnect
if queue in self.subscriptions and not resub:
self.log.info('Ignoring existing subscription %s' % queue)
return True #we're already subscribed
this_uuid = '%s' % uuid.uuid4()
if (self.connection_issue == True):
self.log.info(
'Cannot process subscription request as were not properly connected'
)
self.subscriptions[queue] = {
'uuid': this_uuid,
'callback': callback,
'callback_class': callback_class,
'selector': selector
}
return None
self.log.info('subscribe(%s %s %s %s)' %
(queue, callback_class, callback, resub))
try:
self.subscriptions[queue] = {
'uuid': this_uuid,
'callback': callback,
'callback_class': callback_class,
'selector': selector
}
if selector != None:
self.client.subscribe(
queue, {
StompSpec.ID_HEADER: this_uuid,
StompSpec.ACK_HEADER: StompSpec.ACK_AUTO,
'selector': selector
})
else:
self.client.subscribe(
queue, {
StompSpec.ID_HEADER: this_uuid,
StompSpec.ACK_HEADER: StompSpec.ACK_AUTO,
})
except Exception as e:
self.log.fatal('%s' % e)
self.connection_issue = True
def unsubscribe(self, queue):
if queue not in self.subscriptions:
return False #cant unsubscribe, we're not subscribed
if (self.connection_issue == True):
del self.subscriptions[queue]
return None
try:
self.client.unsubscribe(self.subscriptions[queue]['uuid'])
del self.subscriptions[queue]
except Exception as e:
self.log.error('%s' % e)
self.log.error('%s' % traceback.format_exc())
sys.exc_clear()
self.connection_issue = True
def send_event_lazy(self, destination, body, headers={}, persistent=False):
headers['time_queued'] = time.time()
self.outbound_msg_queue_lazy.append({
'destination': destination,
'body': body,
'headers': headers,
'persistent': persistent
})
def send_event_lazy_thread(self):
while self.continue_running:
time.sleep(0.001)
#If it gets there, then great, if not, well we tried!
if (self.connection_issue == True):
continue
while len(self.outbound_msg_queue_lazy
) > 0 and self.connection_issue == False:
try:
item = self.outbound_msg_queue_lazy.pop(0)
if item['persistent'] == True:
item['headers']['persistent'] = 'true'
else:
item['headers']['persistent'] = 'false'
item['headers']['time_sent'] = time.time()
self.client.send(item['destination'],
json.dumps(item['body']), item['headers'])
except Exception as e:
self.log.critical('Except: %s' % e)
self.outbound_msg_queue_lazy.insert(0, item)
self.connection_issue = True
def send_event_hopeful(self, destination, body, persist):
self.outbound_msg_queue.append({
'destination': destination,
'body': body
})
def send_event_hopeful_thread(self):
while self.continue_running:
time.sleep(0.001)
if (self.connection_issue == True):
continue
while len(self.outbound_msg_queue
) > 0 and self.connection_issue == False:
try:
item = self.outbound_msg_queue.pop(0)
self.client.send(item['destination'],
json.dumps(item['body']),
{'persistent': 'false'})
except Exception as e:
self.log.critical('Except: %s' % e)
self.outbound_msg_queue.insert(0, item)
self.connection_issue = True
def worker(self, queue):
while self.continue_running:
try:
item = queue.get()
for x in 1, 2, 3:
try:
item['callback'](item['callback_class'], item['data'],
item['headers'])
break
except Exception as e:
self.log.error('Exception in worker thread: %s' % e)
traceback.print_exc()
sys.exc_clear()
time.sleep(0.01)
queue.task_done()
except:
pass
def publish_loop(self):
self.log.debug('publish_loop() init')
time.sleep(0.2)
while self.continue_running:
if self.connection_issue == False:
try:
if not self.client.canRead(0.01):
continue
try:
frame = self.client.receiveFrame()
data = json.loads(frame.body)
queue = frame.headers['destination']
try:
time_sent = float(frame.headers['time_sent'])
time_queued = float(frame.headers['time_queued'])
send_latency = (time.time() - time_sent)
queue_latency = (time_sent - time_queued)
if queue_latency > 0.1:
print 'Queue Latency: %s' % (queue_latency)
if send_latency > 0.1:
print 'Send Latency: %s' % (send_latency)
except:
pass
self.work_queue.put({
'callback':
self.subscriptions[queue]['callback'],
'callback_class':
self.subscriptions[queue]['callback_class'],
'data':
data,
'headers':
frame.headers,
})
#self.client.ack(frame)
except Exception as e:
raise
self.log.critical('Except: %s' % e)
#self.client.nack(frame)
except Exception as e:
self.log.fatal('except: %s' % e)
self.connection_issue = True
