def test_6_integration_stomp_1_1_encoding_and_escaping_headers(self):
if BROKER == 'rabbitmq':
print 'Broker does not support unicode characters. Skipping this test case.'
return
version = StompSpec.VERSION_1_1
client = Stomp(self.getConfig(version))
try:
client.connect(host=VIRTUALHOST, versions=[version])
except StompProtocolError as e:
print 'Broker does not support STOMP protocol %s. Skipping this test case. [%s]' % (
e, version)
return
specialCharactersHeader = u'fen\xeatre:\r\n'
headers = {specialCharactersHeader: u'\xbfqu\xe9 tal?, s\xfc\xdf'}
client.send(self.DESTINATION, body='test message 1', headers=headers)
self.assertFalse(client.canRead(self.TIMEOUT))
token = client.subscribe(
self.DESTINATION, {
StompSpec.ID_HEADER: 4711,
StompSpec.ACK_HEADER: StompSpec.ACK_CLIENT_INDIVIDUAL
})
self.assertTrue(client.canRead(self.TIMEOUT))
frame = client.receiveFrame()
client.ack(frame)
self.assertEquals(frame.version, version)
self.assertEquals(frame.headers[specialCharactersHeader],
headers[specialCharactersHeader])
self.assertFalse(client.canRead(self.TIMEOUT))
client.unsubscribe(token)
client.disconnect(receipt='4712')
def _test_4_integration_stomp(self, version):
client = Stomp(self.getConfig(version))
try:
client.connect(host=VIRTUALHOST, versions=[version])
except StompProtocolError as e:
print('Broker does not support STOMP protocol %s. Skipping this test case. [%s]' % (e, version))
return
client.send(self.DESTINATION, b'test message 1')
client.send(self.DESTINATION, b'test message 2')
self.assertFalse(client.canRead(self.TIMEOUT))
token = client.subscribe(self.DESTINATION, {StompSpec.ID_HEADER: 4711, StompSpec.ACK_HEADER: StompSpec.ACK_CLIENT_INDIVIDUAL})
self.assertTrue(client.canRead(self.TIMEOUT))
client.ack(client.receiveFrame())
self.assertTrue(client.canRead(self.TIMEOUT))
client.ack(client.receiveFrame())
self.assertFalse(client.canRead(self.TIMEOUT))
client.unsubscribe(token)
client.send(self.DESTINATION, b'test message 3', receipt='4711')
self.assertTrue(client.canRead(self.TIMEOUT))
self.assertEqual(client.receiveFrame(), StompFrame(StompSpec.RECEIPT, {StompSpec.RECEIPT_ID_HEADER: '4711'}))
self.assertFalse(client.canRead(self.TIMEOUT))
client.subscribe(self.DESTINATION, {StompSpec.ID_HEADER: 4711, StompSpec.ACK_HEADER: StompSpec.ACK_CLIENT_INDIVIDUAL})
self.assertTrue(client.canRead(self.TIMEOUT))
client.ack(client.receiveFrame())
self.assertFalse(client.canRead(self.TIMEOUT))
client.disconnect(receipt='4712')
self.assertEqual(client.receiveFrame(), StompFrame(StompSpec.RECEIPT, {StompSpec.RECEIPT_ID_HEADER: '4712'}))
self.assertRaises(StompConnectionError, client.receiveFrame)
client.connect(host=VIRTUALHOST)
client.disconnect(receipt='4711')
self.assertEqual(client.receiveFrame(), StompFrame(StompSpec.RECEIPT, {StompSpec.RECEIPT_ID_HEADER: '4711'}))
client.close()
self.assertRaises(StompConnectionError, client.canRead, 0)
def test_3_socket_failure_and_replay(self):
client = Stomp(self.getConfig(StompSpec.VERSION_1_0))
client.connect(host=VIRTUALHOST)
headers = {StompSpec.ACK_HEADER: StompSpec.ACK_CLIENT_INDIVIDUAL}
token = client.subscribe(self.DESTINATION, headers)
client.sendFrame(
StompFrame(StompSpec.DISCONNECT)
) # DISCONNECT frame is out-of-band, as far as the session is concerned -> unexpected disconnect
self.assertRaises(StompConnectionError, client.receiveFrame)
client.connect(host=VIRTUALHOST)
client.send(self.DESTINATION, 'test message 1')
client.ack(client.receiveFrame())
client.unsubscribe(token)
headers = {
StompSpec.ID_HEADER: 'bla',
StompSpec.ACK_HEADER: StompSpec.ACK_CLIENT_INDIVIDUAL
}
client.subscribe(self.DESTINATION, headers)
headers[StompSpec.DESTINATION_HEADER] = self.DESTINATION
client.sendFrame(
StompFrame(StompSpec.DISCONNECT)
) # DISCONNECT frame is out-of-band, as far as the session is concerned -> unexpected disconnect
self.assertRaises(StompConnectionError, client.receiveFrame)
client.connect(host=VIRTUALHOST)
client.send(self.DESTINATION, 'test message 2')
client.ack(client.receiveFrame())
client.unsubscribe((StompSpec.ID_HEADER, 'bla'))
client.disconnect()
def test_6_integration_stomp_1_1_encoding_and_escaping_headers(self):
if BROKER == 'rabbitmq':
print('Broker does not support unicode characters. Skipping this test case.')
return
version = StompSpec.VERSION_1_1
client = Stomp(self.getConfig(version))
try:
client.connect(host=VIRTUALHOST, versions=[version])
except StompProtocolError as e:
print('Broker does not support STOMP protocol %s. Skipping this test case. [%s]' % (e, version))
return
key = b'fen\xc3\xaatre'.decode('utf-8')
value = b'\xc2\xbfqu\xc3\xa9 tal?'.decode('utf-8')
headers = {key: value}
client.send(self.DESTINATION, body=b'test message 1', headers=headers)
self.assertFalse(client.canRead(self.TIMEOUT))
token = client.subscribe(self.DESTINATION, {StompSpec.ID_HEADER: 4711, StompSpec.ACK_HEADER: StompSpec.ACK_CLIENT_INDIVIDUAL})
self.assertTrue(client.canRead(self.TIMEOUT))
frame = client.receiveFrame()
client.ack(frame)
self.assertEqual(frame.version, version)
self.assertEqual(frame.headers[key], headers[key])
self.assertFalse(client.canRead(self.TIMEOUT))
client.unsubscribe(token)
client.disconnect(receipt='4712')
def test_6_integration_stomp_1_1_encoding_and_escaping_headers(self):
if BROKER == 'rabbitmq':
print 'Broker does not support unicode characters. Skipping this test case.'
return
version = StompSpec.VERSION_1_1
client = Stomp(self.getConfig(version))
try:
client.connect(host=VIRTUALHOST, versions=[version])
except StompProtocolError as e:
print 'Broker does not support STOMP protocol %s. Skipping this test case. [%s]' % (e, version)
return
specialCharactersHeader = u'fen\xeatre:\r\n'
headers = {specialCharactersHeader: u'\xbfqu\xe9 tal?, s\xfc\xdf'}
client.send(self.DESTINATION, body='test message 1', headers=headers)
self.assertFalse(client.canRead(self.TIMEOUT))
token = client.subscribe(self.DESTINATION, {StompSpec.ID_HEADER: 4711, StompSpec.ACK_HEADER: StompSpec.ACK_CLIENT_INDIVIDUAL})
self.assertTrue(client.canRead(self.TIMEOUT))
frame = client.receiveFrame()
client.ack(frame)
self.assertEquals(frame.version, version)
self.assertEquals(frame.headers[specialCharactersHeader], headers[specialCharactersHeader])
self.assertFalse(client.canRead(self.TIMEOUT))
client.unsubscribe(token)
client.disconnect(receipt='4712')
def test_4_integration_stomp_1_1(self):
if StompSpec.VERSION_1_1 not in commands.versions(VERSION):
print 'This broker does not support STOMP protocol version 1.1'
return
client = Stomp(self.getConfig(StompSpec.VERSION_1_1))
client.connect(host=VIRTUALHOST)
client.send(self.DESTINATION, 'test message 1')
client.send(self.DESTINATION, 'test message 2')
self.assertFalse(client.canRead(self.TIMEOUT))
token = client.subscribe(self.DESTINATION, {StompSpec.ID_HEADER: 4711, StompSpec.ACK_HEADER: 'client-individual'})
self.assertTrue(client.canRead(self.TIMEOUT))
client.ack(client.receiveFrame())
self.assertTrue(client.canRead(self.TIMEOUT))
client.ack(client.receiveFrame())
self.assertFalse(client.canRead(self.TIMEOUT))
client.unsubscribe(token)
client.send(self.DESTINATION, 'test message 3', receipt='4711')
self.assertTrue(client.canRead(self.TIMEOUT))
self.assertEquals(client.receiveFrame(), StompFrame(StompSpec.RECEIPT, {'receipt-id': '4711'}))
self.assertFalse(client.canRead(self.TIMEOUT))
client.subscribe(self.DESTINATION, {StompSpec.ID_HEADER: 4711, StompSpec.ACK_HEADER: 'client-individual'})
self.assertTrue(client.canRead(self.TIMEOUT))
client.ack(client.receiveFrame())
self.assertFalse(client.canRead(self.TIMEOUT))
client.disconnect(receipt='4712')
self.assertEquals(client.receiveFrame(), StompFrame(StompSpec.RECEIPT, {'receipt-id': '4712'}))
self.assertRaises(StompConnectionError, client.receiveFrame)
client.connect(host=VIRTUALHOST)
client.disconnect(receipt='4711')
self.assertEquals(client.receiveFrame(), StompFrame(StompSpec.RECEIPT, {'receipt-id': '4711'}))
client.close()
self.assertRaises(StompConnectionError, client.canRead, 0)
def call_route(request_queue, response_queue, request):
"""
"""
config = {
"stomp": {
"server": '192.168.0.3',
"port": 61613,
"timeout": 15,
}
}
stomp_config = StompConfig("tcp://%s:%d" % (config['stomp']['server'], config['stomp']['port']), version=StompSpec.VERSION_1_0)
stomp = Stomp(stomp_config)
stomp.connect()
jms_id = str(uuid4())
token = stomp.subscribe(response_queue, {'JMSCorrelationID': jms_id})
stomp.send(request_queue, json.dumps(request), {'JMSCorrelationID': jms_id})
response = None
if stomp.canRead(config['stomp']['timeout']):
response = stomp.receiveFrame()
stomp.unsubscribe(token)
return response
def test_3_socket_failure_and_replay(self):
client = Stomp(self.getConfig(StompSpec.VERSION_1_0))
client.connect(host=VIRTUALHOST)
headers = {StompSpec.ACK_HEADER: StompSpec.ACK_CLIENT_INDIVIDUAL}
token = client.subscribe(self.DESTINATION, headers)
client.sendFrame(StompFrame(StompSpec.DISCONNECT)) # DISCONNECT frame is out-of-band, as far as the session is concerned -> unexpected disconnect
self.assertRaises(StompConnectionError, client.receiveFrame)
client.connect(host=VIRTUALHOST)
client.send(self.DESTINATION, b'test message 1')
client.ack(client.receiveFrame())
client.unsubscribe(token)
headers = {StompSpec.ID_HEADER: 'bla', StompSpec.ACK_HEADER: StompSpec.ACK_CLIENT_INDIVIDUAL}
client.subscribe(self.DESTINATION, headers)
headers[StompSpec.DESTINATION_HEADER] = self.DESTINATION
client.sendFrame(StompFrame(StompSpec.DISCONNECT)) # DISCONNECT frame is out-of-band, as far as the session is concerned -> unexpected disconnect
self.assertRaises(StompConnectionError, client.receiveFrame)
client.connect(host=VIRTUALHOST)
client.send(self.DESTINATION, b'test message 2')
client.ack(client.receiveFrame())
client.unsubscribe((StompSpec.ID_HEADER, 'bla'))
client.disconnect()
class p25_metadata_agent():
def __init__(self, host=None, port=None):
self.log = logging.getLogger('overseer.p25_metadata_agent')
self.log.info('Initializing p25_metadata_agent')
self.demod_type = 'p25'
self.redis_demod_manager = redis_demod_manager(self)
if (host != None):
self.host = host
else:
self.host = '127.0.0.1' #manually set here until there is a better place
if (port != None):
self.port = port
else:
self.port = 61613 #manually set here until there is a better place
self.client = None
self.connection_issue = True
self.continue_running = True
self.subscriptions = {}
self.parameters = {}
self.hang_time = 0.5
self.instance_metadata = {}
self.system_metadata = {}
connection_handler = threading.Thread(target=self.connection_handler)
connection_handler.daemon = True
connection_handler.start()
#time.sleep(0.25)
publish_loop = threading.Thread(target=self.publish_loop)
publish_loop.daemon = True
publish_loop.start()
def init_connection(self):
self.log.info('init_connection() (activemq) to tcp://%s/:%s' %
(self.host, self.port))
if (self.client != None and self.client.session.state == 'connected'):
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 connection_handler(self):
self.log.info('connection_handler() startup')
#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
for subscription in self.subscriptions:
self.subscribe(subscription, resub=True)
except:
pass
time.sleep(1)
def subscribe(self, queue, resub=False):
#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:
return True #we're already subscribed
this_uuid = '%s' % uuid.uuid4()
if (self.connection_issue == True):
self.subscriptions[queue] = this_uuid
return None
try:
self.subscriptions[queue] = this_uuid
self.client.subscribe(
queue, {
StompSpec.ID_HEADER: this_uuid,
StompSpec.ACK_HEADER: StompSpec.ACK_CLIENT_INDIVIDUAL,
})
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):
return None
try:
self.client.unsubscribe(
self.subscriptions[queue],
{StompSpec.ACK_HEADER: StompSpec.ACK_CLIENT_INDIVIDUAL})
del self.subscriptions[queue]
except Exception as e:
self.log.fatal('%s' % e)
self.connection_issue = True
def send_event_lazy(self, destination, body):
#If it gets there, then great, if not, well we tried!
if (self.connection_issue == True):
return None
try:
self.client.send(destination, json.dumps(body))
except:
self.connection_issue = True
def notify_demod_new(self, demod_instance_uuid):
self.log.info('Notified of new demod %s' % (demod_instance_uuid))
self.subscribe('/topic/raw_control/%s' % (demod_instance_uuid))
def notify_demod_expire(self, demod_instance_uuid):
self.log.info('Notified of expired demod %s' % (demod_instance_uuid))
self.unsubscribe('/topic/raw_control/%s' % (demod_instance_uuid))
def get_channel_detail(self, instance, channel):
chan_ident = (channel & 0xf000) >> 12
chan_number = channel & 0x0fff
try:
base_freq = self.instance_metadata[instance][
'channel_identifier_table'][chan_ident]['Base Frequency']
chan_spacing = self.instance_metadata[instance][
'channel_identifier_table'][chan_ident][
'Channel Spacing'] / 1000
slots = self.instance_metadata[instance][
'channel_identifier_table'][chan_ident]['Slots']
modulation = self.instance_metadata[instance][
'channel_identifier_table'][chan_ident]['Type']
except KeyError:
return False, False, False, False
chan_freq = ((chan_number / slots) * chan_spacing)
slot_number = (chan_number % slots)
channel_frequency = math.floor((base_freq + chan_freq) * 1000000)
channel_bandwidth = self.instance_metadata[instance][
'channel_identifier_table'][chan_ident]['BW'] * 1000
return channel_frequency, channel_bandwidth, slot_number, modulation
def get_system_from_instance(self, instance_uuid):
try:
return self.redis_demod_manager.demods[instance_uuid][
'system_uuid']
except:
return False
def is_updated(self, instance, parameter, value):
if instance not in self.parameters:
self.parameters[instance] = {}
if parameter not in self.parameters[instance]:
self.parameters[instance][parameter] = value
return True
elif self.parameters[instance][parameter] != value:
self.parameters[instance][parameter] = value
return True
else:
return False
def publish_loop(self):
self.log.info('publish_loop() startup')
while self.continue_running:
if self.connection_issue == False:
try:
if not self.client.canRead(0.1):
continue
frame = self.client.receiveFrame()
t = json.loads(frame.body)
instance_uuid = frame.headers['destination'].replace(
'/topic/raw_control/', '')
try:
instance = self.redis_demod_manager.demods[
instance_uuid]
except:
continue
#system_uuid = self.get_system_from_instance(instance_uuid)
if instance_uuid not in self.instance_metadata:
self.instance_metadata[instance_uuid] = {
'channel_identifier_table': {}
}
if 'crc' not in t or t['crc'] != 0:
continue #Don't bother trying to work with bad data
to_check = []
if t['name'] == 'IDEN_UP_VU':
to_check.append({
'parameter': 'FIT-%s' % t['Identifier'],
'value': {
'BW': t['BW VU'],
'Base Frequency': t['Base Frequency'],
'Channel Spacing': t['Channel Spacing'],
'Transmit Offset': t['Transmit Offset VU'],
'Type': 'FDMA',
'Slots': 1,
}
})
self.instance_metadata[instance_uuid][
'channel_identifier_table'][t['Identifier']] = {
'BW': t['BW VU'],
'Base Frequency': t['Base Frequency'],
'Channel Spacing': t['Channel Spacing'],
'Transmit Offset': t['Transmit Offset VU'],
'Type': 'FDMA',
'Slots': 1,
}
elif t['name'] == 'IDEN_UP':
to_check.append({
'parameter': 'FIT-%s' % t['Identifier'],
'value': {
'BW': t['BW'],
'Base Frequency': t['Base Frequency'],
'Channel Spacing': t['Channel Spacing'],
'Transmit Offset': t['Transmit Offset'],
'Type': 'FDMA',
'Slots': 1,
}
})
self.instance_metadata[instance_uuid][
'channel_identifier_table'][t['Identifier']] = {
'BW': t['BW'],
'Base Frequency': t['Base Frequency'],
'Channel Spacing': t['Channel Spacing'],
'Transmit Offset': t['Transmit Offset'],
'Type': 'FDMA',
'Slots': 1,
}
elif t['name'] == 'IDEN_UP_TDMA':
to_check.append({
'parameter': 'FIT-%s' % t['Identifier'],
'value': {
'BW': t['BW'],
'Base Frequency': t['Base Frequency'],
'Channel Spacing': t['Channel Spacing'],
'Transmit Offset': t['Transmit Offset TDMA'],
'Type': t['Access Type'],
'Slots': t['Slots'],
}
})
self.instance_metadata[instance_uuid][
'channel_identifier_table'][t['Identifier']] = {
'BW': t['BW'],
'Base Frequency': t['Base Frequency'],
'Channel Spacing': t['Channel Spacing'],
'Transmit Offset': t['Transmit Offset TDMA'],
'Type': t['Access Type'],
'Slots': t['Slots'],
}
elif t['name'] == 'NET_STS_BCST':
to_check.append({
'parameter': 'WACN ID',
'value': hex(int(t['WACN ID']))
})
to_check.append({
'parameter': 'System ID',
'value': hex(int(t['System ID']))
})
to_check.append({
'parameter': 'System Service Class',
'value': t['System Service Class']
})
frequency, bandwidth, slot_number, modulation = self.get_channel_detail(
instance_uuid, t['Channel'])
if frequency != False:
to_check.append({
'parameter': 'Control Channel',
'value': {
'frequency': frequency,
'bandwidth': bandwidth
}
})
elif t['name'] == 'RFSS_STS_BCST':
to_check.append({
'parameter': 'Site ID',
'value': t['Site ID']
})
to_check.append({
'parameter': 'RF Sub-system ID',
'value': t['RF Sub-system ID']
})
to_check.append({
'parameter': 'RFSS Network Connection',
'value': t['A']
})
elif t['name'] == 'ADJ_STS_BCST':
print '%s' % t
pass
for d in to_check:
if self.is_updated(instance_uuid, d['parameter'],
d['value']):
print 'Updated! %s %s %s' % (
instance_uuid, d['parameter'], d['value'])
message = {
'transmit_site_uuid':
self.redis_demod_manager.demods[instance_uuid]
['transmit_site_uuid'],
'receive_site_uuid':
self.redis_demod_manager.demods[instance_uuid]
['site_uuid'],
'parameter':
d['parameter'],
'value':
d['value'],
}
self.send_event_lazy('/queue/metadata/site_update',
message)
self.client.ack(frame)
except Exception as e:
self.log.fatal('except: %s' % e)
raise
self.connection_issue = True
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 JMSClient(object):
"""Class JMSClient
"""
_mh = None
_client = None
_host = None
_port = None
_user = None
_passw = None
_verbose = None
_is_connected = None
def __init__(self, verbose=False):
"""Class constructor
Called when the object is initialized
Args:
verbose (bool): verbose mode
"""
try:
self._mh = MasterHead.get_head()
self._verbose = verbose
if (self._verbose):
basicConfig()
getLogger().setLevel(DEBUG)
except StompError as ex:
self._mh.demsg('htk_on_error', ex, self._mh.fromhere())
@property
def client(self):
""" STOMP client property getter """
return self._client
@property
def host(self):
""" server host property getter """
return self._host
@property
def port(self):
""" server port property getter """
return self._port
@property
def user(self):
""" username property getter """
return self._user
@property
def passw(self):
""" user password property getter """
return self._passw
@property
def verbose(self):
""" verbose mode property getter """
return self._verbose
@property
def is_connected(self):
""" is_connected property getter """
return self._is_connected
def connect(self, host, port=61613, user=None, passw=None, timeout=10):
"""Method connects to server
Args:
host (str): hostname
port (str): port
user (str): username
passw (str): password
timeout (int): timeout
Returns:
bool: result
Raises:
event: jms_before_connect
event: jms_after_connected
"""
try:
msg = 'host:{0}, port:{1}, user:{2}, passw:{3}, timeout:{4}'.format(
host, port, user, passw, timeout)
self._mh.demsg('htk_on_debug_info', self._mh._trn.msg(
'htk_jms_connecting', msg), self._mh.fromhere())
ev = event.Event(
'jms_before_connect', host, port, user, passw, timeout)
if (self._mh.fire_event(ev) > 0):
host = ev.argv(0)
port = ev.argv(1)
user = ev.argv(2)
passw = ev.argv(3)
timeout = ev.argv(4)
self._host = host
self._port = port
self._user = user
self._passw = passw
if (ev.will_run_default()):
self._client = Stomp(StompConfig('tcp://{0}:{1}'.format(self._host, self._port),
login=self._user, passcode=self._passw))
self._client.connect(
connectTimeout=timeout, connectedTimeout=timeout)
self._is_connected = True
self._mh.demsg('htk_on_debug_info', self._mh._trn.msg(
'htk_jms_connected'), self._mh.fromhere())
ev = event.Event('jms_after_connect')
self._mh.fire_event(ev)
return True
except StompError as ex:
self._mh.demsg('htk_on_error', ex, self._mh.fromhere())
return False
def disconnect(self):
"""Method disconnects from server
Args:
none
Returns:
bool: result
"""
try:
self._mh.demsg('htk_on_debug_info', self._mh._trn.msg(
'htk_jms_disconnecting'), self._mh.fromhere())
if (not self._is_connected):
self._mh.demsg('htk_on_warning', self._mh._trn.msg(
'htk_jms_not_connected'), self._mh.fromhere())
return False
else:
self._client.disconnect()
self._client.close()
self._is_connected = False
self._mh.demsg('htk_on_debug_info', self._mh._trn.msg(
'htk_jms_disconnected'), self._mh.fromhere())
return True
except StompError as ex:
self._mh.demsg('htk_on_error', ex, self._mh.fromhere())
return False
def send(self, destination_name, message, destination_type='queue', headers={}):
"""Method sends message
JMS headers - JMSCorrelationID, JMSExpiration, JMSDeliveryMode, JMSPriority,
JMSReplyTo, JMSType
Args:
destination_name (str): queue|topic name
message (str): message
destination_type (str): queue|topic
headers (dict): JMS headers, key - title, value - string
Returns:
bool: result
Raises:
event: jms_before_send
event: jms_after_send
"""
try:
msg = 'destination_name:{0}, message:{1}, destination_type:{2}, headers:{3}'.format(
destination_name, message, destination_type, headers)
self._mh.demsg('htk_on_debug_info', self._mh._trn.msg(
'htk_jms_sending_msg', msg), self._mh.fromhere())
if (not self._is_connected):
self._mh.demsg('htk_on_warning', self._mh._trn.msg(
'htk_jms_not_connected'), self._mh.fromhere())
return False
ev = event.Event(
'jms_before_send', destination_name, message, destination_type, headers)
if (self._mh.fire_event(ev) > 0):
destination_name = ev.argv(0)
message = ev.argv(1)
destination_type = ev.argv(2)
headers = ev.argv(3)
if (ev.will_run_default()):
headers_new = {}
for key, value in headers.items():
if (key in mapping):
headers_new[mapping[key]] = value
self._client.send('/{0}/{1}'.format(destination_type, destination_name), message if (
version_info[0] == 2) else message.encode('utf-8'), headers_new)
self._mh.demsg('htk_on_debug_info', self._mh._trn.msg(
'htk_jms_msg_sent'), self._mh.fromhere())
ev = event.Event('jms_after_send')
self._mh.fire_event(ev)
return True
except StompError as ex:
self._mh.demsg('htk_on_error', ex, self._mh.fromhere())
return False
def receive(self, destination_name, cnt=1):
"""Method receives messages
Args:
destination_name (str): queue name
cnt (int): count of messages
Returns:
list: messages as dictionary {'message', JMS headers}
Raises:
event: jms_before_receive
event: jms_after_receive
"""
try:
msg = 'destination_name:{0}, count:{1}'.format(
destination_name, cnt)
self._mh.demsg('htk_on_debug_info', self._mh._trn.msg(
'htk_jms_receiving_msg', msg), self._mh.fromhere())
if (not self._is_connected):
self._mh.demsg('htk_on_warning', self._mh._trn.msg(
'htk_jms_not_connected'), self._mh.fromhere())
return None
ev = event.Event('jms_before_receive', destination_name, cnt)
if (self._mh.fire_event(ev) > 0):
destination_name = ev.argv(0)
cnt = ev.argv(1)
if (ev.will_run_default()):
token = self._client.subscribe('/queue/{0}'.format(destination_name),
{StompSpec.ACK_HEADER: StompSpec.ACK_CLIENT_INDIVIDUAL})
msgs = []
i = 0
while (i < cnt and self._client.canRead(1)):
frame = self._client.receiveFrame()
if (frame.command != 'MESSAGE'):
break
self._client.ack(frame)
msgs.append(frame)
i = i + 1
self._client.unsubscribe(token)
messages = []
for msg in msgs:
message = {}
message['message'] = msg.body.decode()
for header in msg.rawHeaders:
if (header[0] in mapping.values()):
message[
list(mapping.keys())[list(mapping.values()).index(header[0])]] = header[1]
messages.append(message)
self._mh.demsg('htk_on_debug_info', self._mh._trn.msg(
'htk_jms_msg_received', len(messages)), self._mh.fromhere())
ev = event.Event('jms_after_receive')
self._mh.fire_event(ev)
return messages
except StompError as ex:
self._mh.demsg('htk_on_error', ex, self._mh.fromhere())
return None
def browse(self, destination_name, cnt=100, jms_correlation_id=None, jms_type=None):
"""Method browses queue
Args:
destination_name (str): queue name
cnt (int): count of messages
jms_correlation_id (str): requested JMSCorrelationID
jms_type (str): requested JMSType
Returns:
list: messages as dictionary {'message', JMS headers}
Raises:
event: jms_before_browse
event: jms_after_browse
"""
try:
msg = 'destination_name:{0}, count:{1}, jms_correlation_id:{2}, jms_type:{3}'.format(
destination_name, cnt, jms_correlation_id, jms_type)
self._mh.demsg('htk_on_debug_info', self._mh._trn.msg(
'htk_jms_browsing', msg), self._mh.fromhere())
if (not self._is_connected):
self._mh.demsg('htk_on_warning', self._mh._trn.msg(
'htk_jms_not_connected'), self._mh.fromhere())
return None
ev = event.Event(
'jms_before_browse', destination_name, cnt, jms_correlation_id, jms_type)
if (self._mh.fire_event(ev) > 0):
destination_name = ev.argv(0)
cnt = ev.argv(1)
jms_correlation_id = ev.argv(2)
jms_type = ev.argv(3)
if (ev.will_run_default()):
token = self._client.subscribe('/queue/{0}'.format(destination_name),
{StompSpec.ACK_HEADER: StompSpec.ACK_CLIENT_INDIVIDUAL})
msgs = []
i = 0
while (i < cnt and self._client.canRead(1)):
frame = self._client.receiveFrame()
correlation_id = None
type = None
for header in frame.rawHeaders:
if (header[0] == 'correlation-id'):
correlation_id = header[1]
elif (header[0] == 'type'):
type = header[1]
if ((jms_correlation_id == None or jms_correlation_id == correlation_id) and
(jms_type == None or jms_type == type)):
msgs.append(frame)
i = i + 1
self._client.unsubscribe(token)
messages = []
for msg in msgs:
message = {}
message['message'] = msg.body.decode()
for header in msg.rawHeaders:
if (header[0] in mapping.values()):
message[
list(mapping.keys())[list(mapping.values()).index(header[0])]] = header[1]
messages.append(message)
self._mh.demsg('htk_on_debug_info', self._mh._trn.msg(
'htk_jms_msg_received', len(messages)), self._mh.fromhere())
ev = event.Event('jms_after_browse')
self._mh.fire_event(ev)
return messages
except StompError as ex:
self._mh.demsg('htk_on_error', ex, self._mh.fromhere())
return None
class ByteportStompClient(AbstractByteportClient):
DEFAULT_BROKER_HOST = 'stomp.byteport.se'
STORE_QUEUE_NAME = '/queue/simple_string_dev_message'
SUPPORTED_CHANNEL_TYPES = ['topic', 'queue']
client = None
def __init__(self, namespace, login, passcode, broker_host=DEFAULT_BROKER_HOST, device_uid=None, channel_type='topic'):
'''
Create a ByteportStompClient. This is a thin wrapper to the underlying STOMP-client that connets to the Byteport Broker
If a device_uid is given, a subscription will be made for Messages sent through Byteport.
The channel_type must be either 'topic' or 'queue'. Set top topic if unsure on what to use (use queue if you need to
use multiple consumers for a single device, this is not how most applications are set up).
:param namespace:
:param login: Broker username (Byteport web users are _not_ valid broker users). Ask [email protected] for access.
:param passcode: Broker passcode
:param broker_hosts: [optional] A list of brokers to connect to
:param device_uid: [optional] The device UID to subscribe for messages on
:param channel_type: [optional] Defaults to queue.
:param channel_key: [optional] Must match the configured key in the Byteport Device Manager
'''
self.namespace = str(namespace)
self.device_uid = device_uid
if channel_type not in self.SUPPORTED_CHANNEL_TYPES:
raise Exception("Unsupported channel type: %s" % channel_type)
broker_url = 'tcp://%s:61613' % broker_host
self.CONFIG = StompConfig(broker_url, version=StompSpec.VERSION_1_2)
self.client = Stomp(self.CONFIG)
try:
self.client.connect(headers={'login': login, 'passcode': passcode}, host='/')
logging.info("Connected to Stomp broker at %s using protocol version %s" % (broker_host, self.client.session.version))
# Set up a subscription on the correct queue if a Specific device UID was given
if self.device_uid:
subscribe_headers = dict()
subscribe_headers[StompSpec.ACK_HEADER] = StompSpec.ACK_CLIENT_INDIVIDUAL
subscribe_headers[StompSpec.ID_HEADER] = '0'
device_message_queue_name = '/%s/device_messages_%s.%s' % (channel_type, namespace, device_uid)
self.subscription_token = self.client.subscribe(device_message_queue_name, subscribe_headers)
logging.info("Subscribing to channel %s" % device_message_queue_name)
except StompProtocolError as e:
logging.error("Client socket connected, but probably failed to login. (ProtocolError)")
raise
except StompConnectionError:
logging.error("Failed to connect to Stomp Broker at %s" % broker_host)
raise
def disconnect(self):
if self.subscription_token:
try:
self.client.unsubscribe(self.subscription_token)
except Exception as e:
logging.error(u'Unsubscribe failed, reason %s' % e)
self.client.disconnect()
def __send_json_message(self, json):
self.client.send(self.STORE_QUEUE_NAME, json)
def __send_message(self, uid, data_string, timestamp=None):
if timestamp:
timestamp = self.auto_timestamp(timestamp)
else:
timestamp = int(time.time())
if not uid:
uid = self.device_uid
if not uid:
raise Exception("Can not send data without valid Device UID!")
message = dict()
message['uid'] = str(uid)
message['namespace'] = self.namespace
message['data'] = str(data_string)
message['timestamp'] = str(timestamp)
self.__send_json_message(json.dumps([message]))
def store(self, data=None, device_uid=None, timestamp=None):
if type(data) != dict:
raise ByteportClientException("Data must be of type dict")
for key in data.keys():
self.verify_field_name(key)
delimited_data = ';'.join("%s=%s" % (key, self.utf8_encode_value(val)) for (key, val) in data.iteritems())
self.__send_message(device_uid, delimited_data, timestamp)
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
