Synnefo

#!/usr/bin/env python

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import sys

import logging

from synnefo.lib.queue import (exchange_connect, exchange_close,

                               exchange_send, exchange_route, queue_callback, queue_start)

from optparse import OptionParser

from django.core.management import setup_environ

try:

    from synnefo import settings

except ImportError:

    raise Exception("Cannot import settings")

setup_environ(settings)

BROKER_HOST = 'localhost'

BROKER_PORT = 5672

BROKER_USER = 'guest'

BROKER_PASSWORD = 'guest'

BROKER_VHOST = '/'

CONSUMER_QUEUE = 'feed'

CONSUMER_EXCHANGE = 'sample'

CONSUMER_KEY = '#'

def main():

    parser = OptionParser()

    parser.add_option('-v', '--verbose', action='store_true', default=False,

                      dest='verbose', help='Enable verbose logging')

    parser.add_option('--host', default=BROKER_HOST, dest='host',

                      help='RabbitMQ host (default: %s)' % BROKER_HOST)

    parser.add_option('--port', default=BROKER_PORT, dest='port',

                      help='RabbitMQ port (default: %s)' % BROKER_PORT, type='int')

    parser.add_option('--user', default=BROKER_USER, dest='user',

                      help='RabbitMQ user (default: %s)' % BROKER_USER)

    parser.add_option('--password', default=BROKER_PASSWORD, dest='password',

                      help='RabbitMQ password (default: %s)' % BROKER_PASSWORD)

    parser.add_option('--vhost', default=BROKER_VHOST, dest='vhost',

                      help='RabbitMQ vhost (default: %s)' % BROKER_VHOST)

    parser.add_option('--queue', default=CONSUMER_QUEUE, dest='queue',

                      help='RabbitMQ queue (default: %s)' % CONSUMER_QUEUE)

    parser.add_option('--exchange', default=CONSUMER_EXCHANGE, dest='exchange',

                      help='RabbitMQ exchange (default: %s)' % CONSUMER_EXCHANGE)

    parser.add_option('--key', default=CONSUMER_KEY, dest='key',

                      help='RabbitMQ key (default: %s)' % CONSUMER_KEY)

    parser.add_option('--callback', default=None, dest='callback',

                      help='Callback function to consume messages')

    parser.add_option('--test', action='store_true', default=False,

                      dest='test', help='Produce a dummy message for testing')

    opts, args = parser.parse_args()

    DEBUG = False

    if opts.verbose:

        DEBUG = True

    logging.basicConfig(

        format='%(asctime)s [%(levelname)s] %(name)s %(message)s',

        datefmt='%Y-%m-%d %H:%M:%S',

        level=logging.DEBUG if DEBUG else logging.INFO)

    logger = logging.getLogger('dispatcher')

    exchange = 'rabbitmq://%s:%s@%s:%s/%s' % (

        opts.user, opts.password, opts.host, opts.port, opts.exchange)

    connection = exchange_connect(exchange)

    if opts.test:

        exchange_send(connection, opts.key, {"test": "0123456789"})

        exchange_close(connection)

        sys.exit()

    callback = None

    if opts.callback:

        cb = opts.callback.rsplit('.', 1)

        if len(cb) == 2:

            __import__(cb[0])

            cb_module = sys.modules[cb[0]]

            callback = getattr(cb_module, cb[1])

    def handle_message(msg):

        print msg

        logger.debug('%s', msg)

        if callback:

            callback(msg)

    exchange_route(connection, opts.key, opts.queue)

    queue_callback(connection, opts.queue, handle_message)

    try:

        queue_start(connection)

    except KeyboardInterrupt:

        pass

if __name__ == '__main__':

    main()