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rbmq.py
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rbmq.py
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#Copyright 2017 Tim Wentlau.
#Distributed under the MIT License. See LICENSE in root of project.
import logging
import time
import threading
import amqpstorm
from amqpstorm import Connection
from amqpstorm import UriConnection
import json
import requests
logging.basicConfig(level=logging.CRITICAL)
LOGGER = logging.getLogger()
class _MQConsumer(threading.Thread):
def __init__(self, connection):
threading.Thread.__init__(self, None, None, "MQConsumer")
self.deamon = True
self._connection = connection
self._consumer_tag = None
self._router = connection._router
self._exchange = connection._router._app_id
self._queue = connection._router._router_id
self._channel = None
def run(self):
"""Start the Consumers.
:return:
"""
while True:
try:
channel = self._connection._connection.channel()
self._channel = channel
channel.queue.declare(
self._queue,
auto_delete=True,
arguments = {
"x-message-ttl": 5000,
"x-max-length": 100
}
)
channel.queue.bind(self._queue, self._exchange, "ping")
channel.queue.bind(self._queue, self._exchange, "session")
channel.queue.bind(self._queue, self._exchange, "message")# "*." + self._router._connection_id + ".*")
channel.basic.consume(self, self._queue, no_ack=True, no_local=False)
channel.start_consuming()
if not channel.consumer_tags:
channel.close()
except amqpstorm.AMQPError as why:
#LOGGER.exception(why)
print("w", why)
break
#self.create_connection()
except KeyboardInterrupt:
#self.connection.close()
break
print("exit consumer")
def stop(self):
self._channel.stop_consuming()
#self._channel.close()
def __call__(self, message):
self._connection._on_message(message)
#message.ack()
class _PingThread(threading.Thread):
def __init__(self, publisher, id):
threading.Thread.__init__(self, None, None, "rbmqPing")
self.deamon = True
self._publisher = publisher
self._router = publisher._connection._router
self._interval = 5
self._headers = {
"connection_id": id,
"routes": None,
"topic" : "ping",
"router_id": self._router._router_id
}
self._terminated = False
def stop(self):
self._terminated = True
def run(self):
while not self._terminated:
routes = []
for route in self._router.routes_in:
routes.append(route.as_dict())
json_routes = json.dumps(routes)
properties = {
'content_type': 'application/json',
"headers": self._headers
}
self._publisher._channel.basic.publish(
json_routes,
"ping",
self._publisher._connection._app_id,
properties
)
request_res = requests.post(
"https://api.kervi.io/sessions",
headers= {
"api-user": self._publisher._connection._user,
"api-password": self._publisher._connection._password,
"app_id": self._publisher._connection._app_id,
"app_name": self._publisher._connection._app_name
}
)
time.sleep(self._interval)
class _MQPublisher(object):
def __init__(self, connection):
self._connection = connection
self._channel = self._connection._connection.channel()
#self._channel.queue.declare('simple_queue')
self._ping_thread = _PingThread(self, self._connection._router._connection_id)
self._ping_thread.start()
#self._bus_topic = None
def stop(self):
self._ping_thread.stop()
self._channel.close()
def send_message(self, topic, payload, headers={}):
headers["topic"] = topic
headers["router_id"] = self._connection._router._router_id
properties = {
'content_type': 'application/json',
'headers': headers
}
json_body = json.dumps(payload, ensure_ascii=False)
#print("sm",topic + self._connection._bus_topic, payload)
self._channel.basic.publish(
json_body,
"message", #self._connection._bus_topic,
self._connection._app_id,
properties
)
class _MQConnection(object):
def __init__(self, router, user, password, address, port, api_key, app_id, app_name):
#print("init mqc")
self._max_retries = 10
self._connection = None
self._consumer = None
self._publisher = None
#self._bus_topic = ""
self._consumer_tag = None
self._user = user
self._password = password
self._address = address
self._port = port
self._vhost = api_key
self._app_id = app_id
self._app_name = app_name
self._router = router
self.connected = False
def connect(self):
"""Create a connection.
:return:
"""
attempts = 0
while True:
attempts += 1
try:
if self._router._connection_type=="app":
request_res = requests.post(
"https://api.kervi.io/sessions",
headers= {
"api-user": self._user,
"api-password": self._password,
"app_id": self._app_id,
"app_name": self._app_name,
}
)
print("cres", request_res.json())
connection_string = 'amqps://'+self._user+':'+self._password+'@'+self._address+':' + str(self._port)+'/'+self._vhost
#print("cns", connection_string)
self._connection = UriConnection(
connection_string
)
#self._connection = Connection(self._address, self._user, self._password, port=self._port, vhost=self._vhost)
break
except amqpstorm.AMQPError as why:
LOGGER.exception(why)
print("why connect", why.error_code)
if why.error_code == 403 or why.error_code == 530:
print("Kervi.io authentication error, check configuration for the plugin kervi.plugin.routing.kervi_io")
break
if self._max_retries and attempts > self._max_retries:
break
time.sleep(min(attempts * 2, 30))
except KeyboardInterrupt:
break
if self._connection:
self._consumer = _MQConsumer(self)
self._consumer.start()
self._publisher = _MQPublisher(self)
self._router.on_connected()
def disconnect(self):
if self._consumer:
self._consumer.stop()
if self._publisher:
self._publisher.stop()
if self._connection:
self._connection.close()
def _on_message(self, message):
if message.method["routing_key"] == "ping":
self._router.on_ping(message.properties["headers"], message.json())
elif message.method["routing_key"] == "session":
self._router.on_session(message.properties["headers"], message.json())
else:
#print("Message:", message.json(), message.method, message.message_id, message.properties)
self._router.on_message(message.properties["headers"], message.json())
def send_message(self, topic, message, headers):
if self._publisher:
self._publisher.send_message(topic, message, headers)
def register_bus_connection(self, connection):
#self._bus_topic = ".Q." + "".join(self._router._connections.keys()) + ".Q"
#print("bt", self._bus_topic)
pass