Sample Consumer-Publisher

consumer.py

from collections import OrderedDict
from concurrent.futures import ThreadPoolExecutor

import pika
import datetime
import logging
import json
from logging import StreamHandler
from time import sleep
from random import randint
from pika import SelectConnection

logging.basicConfig(handlers=[StreamHandler()],
                    level=logging.INFO,
                    format=logging.BASIC_FORMAT)
_logger = logging.getLogger(__name__)


class QueueConsumer(object):
    """The consumer class to manage connections to the AMQP server/queue"""

    def __init__(self, queue, logger, parameters, thread_id=0):
        self.channel = None
        self.connection = None
        self.queue_name = queue
        self.logger = logger
        self.consumer_id = 'Thread: %d' % (thread_id,)
        self.parameters = pika.ConnectionParameters(**parameters)

    def _on_queue_declared(self, frame):
        self.logger.debug('{} ... declaring queue'.format(self.consumer_id))
        self.channel.basic_qos(prefetch_count=1)
        try:
            self.channel.basic_consume(self.handle_delivery, queue=self.queue_name, no_ack=True)
            self.logger.info("{} Declared queue...".format(self.consumer_id))
        except Exception as e:
            self.logger.error('{} crashing:--> {}'.format(self.consumer_id, str(e)))

    def _on_channel_open(self, channel):
        self.channel = channel
        try:
            self.channel.queue_declare(queue=self.queue_name,
                                       exclusive=False,
                                       durable=True,
                                       auto_delete=False,
                                       callback=self._on_queue_declared)
            self.logger.info("{} Opened Channel....".format(self.consumer_id))
        except Exception as e:
            self.logger.error('{} {}'.format(self.consumer_id, str(e)))

    def _on_connected(self, connection):
        connection.channel(self._on_channel_open)

    def consume(self):
        try:
            self.connection = SelectConnection(self.parameters,
                                               self._on_connected)
            self.connection.ioloop.start()
        except Exception as e:
            self.logger.error('{} {}'.format(self.consumer_id, str(e)))
            self.connection.close()
            self.connection.ioloop.start()

    def decode(self, body):
        try:
            _body = body.decode('utf-8')
        except AttributeError:
            _body = body

        return _body

    def handle_delivery(self, channel, method, header, body):
        try:
            start_time = datetime.datetime.now()
            _logger.info("Received...")
            _logger.info("Content: %s" % body)
            req = json.loads(self.decode(body))

            # Do something
            sleep(randint(10, 100))

            time_taken = datetime.datetime.now() - start_time
            _logger.info("[{}] Time Taken: {}.{}".format(
                req.get("to_num"), time_taken.seconds, time_taken.microseconds))

        except Exception as err:
            _logger.exception(err)


if __name__ == "__main__":
    workers = 3
    pika_parameters = OrderedDict([('host', '127.0.0.1'), ('port', 5672), ('virtual_host', '/')])
    try:
        pool = ThreadPoolExecutor(max_workers=workers)
        start = 1
        for thread_id in range(start, (workers + start)):
            pool.submit(QueueConsumer('test_queue', _logger, pika_parameters, thread_id).consume)

    except Exception as err:
        _logger.exception(err)

publisher.py

import uuid
import pika
import logging
import json
from logging import StreamHandler
from pika import SelectConnection

logging.basicConfig(handlers=[StreamHandler()],
                    level=logging.DEBUG,
                    format=logging.BASIC_FORMAT)
_logger = logging.getLogger(__name__)


class QueuePublisherClient(object):

    def __init__(self, queue, request):
        self.queue = queue
        self.response = None
        self.channel = None
        self.request = request
        self.corrId = str(uuid.uuid4())
        self.callBackQueue = None
        self.connection = None
        parameters = pika.ConnectionParameters(host="0.0.0.0")
        self.connection = SelectConnection(
            parameters, self.on_response_connected
        )
        self.connection.ioloop.start()

    def on_response(self, ch, method, props, body):
        if self.corrId == props.correlation_id:
            self.response = body
            self.connection.close()
            self.connection.ioloop.start()

    def on_response_connected(self, connection):
        _logger.info("Connected...\t(%s)" % self.queue)
        self.connection = connection
        self.connection.channel(self.on_channel_open)

    def on_connected(self, connection):
        self.connection = connection
        self.connection.channel(self.on_channel_open)

    def on_channel_open(self, channel):
        # _logger.info("Channel Opened...\t(%s)" % self.queue)
        self.channel = channel
        self.channel.queue_declare(queue=self.queue,
                                   durable=True,
                                   exclusive=False,
                                   auto_delete=False,
                                   callback=self.on_queue_declared)

    def on_queue_declared(self, frame):
        self.channel.basic_publish(exchange="",
                                   routing_key=self.queue,
                                   properties=pika.BasicProperties(),
                                   body=str(self.request))
        self.connection.close()
        _logger.info("Message Published...\t(%s)" % self.queue)


if __name__ == "__main__":
    data = {
        'text': 'This is a sample text',
        'to_num': '+2547xxxxxxxx'
    }
    count = 10000

    for index in range(count):
        data['index'] = index
        QueuePublisherClient("test_queue", json.dumps(data))