Revision 2e450abb
b/pithos/tools/dispatcher.py | ||
---|---|---|
1 |
#!/usr/bin/env python |
|
2 |
|
|
3 |
# Copyright 2011 GRNET S.A. All rights reserved. |
|
4 |
# |
|
5 |
# Redistribution and use in source and binary forms, with or |
|
6 |
# without modification, are permitted provided that the following |
|
7 |
# conditions are met: |
|
8 |
# |
|
9 |
# 1. Redistributions of source code must retain the above |
|
10 |
# copyright notice, this list of conditions and the following |
|
11 |
# disclaimer. |
|
12 |
# |
|
13 |
# 2. Redistributions in binary form must reproduce the above |
|
14 |
# copyright notice, this list of conditions and the following |
|
15 |
# disclaimer in the documentation and/or other materials |
|
16 |
# provided with the distribution. |
|
17 |
# |
|
18 |
# THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS |
|
19 |
# OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
|
20 |
# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
|
21 |
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR |
|
22 |
# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
|
23 |
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
|
24 |
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
|
25 |
# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
|
26 |
# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
|
27 |
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
|
28 |
# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
|
29 |
# POSSIBILITY OF SUCH DAMAGE. |
|
30 |
# |
|
31 |
# The views and conclusions contained in the software and |
|
32 |
# documentation are those of the authors and should not be |
|
33 |
# interpreted as representing official policies, either expressed |
|
34 |
# or implied, of GRNET S.A. |
|
35 |
|
|
36 |
import sys |
|
37 |
import logging |
|
38 |
|
|
39 |
from optparse import OptionParser |
|
40 |
|
|
41 |
from carrot.connection import BrokerConnection |
|
42 |
from carrot.messaging import Consumer |
|
43 |
from carrot.messaging import Publisher |
|
44 |
|
|
45 |
|
|
46 |
BROKER_HOST = 'localhost' |
|
47 |
BROKER_PORT = 5672 |
|
48 |
BROKER_USER = 'guest' |
|
49 |
BROKER_PASSWORD = 'guest' |
|
50 |
BROKER_VHOST = '/' |
|
51 |
|
|
52 |
CONSUMER_QUEUE = 'feed' |
|
53 |
CONSUMER_EXCHANGE = 'sample' |
|
54 |
CONSUMER_KEY = '#' |
|
55 |
|
|
56 |
DEBUG = False |
|
57 |
|
|
58 |
|
|
59 |
if __name__ == '__main__': |
|
60 |
parser = OptionParser() |
|
61 |
parser.add_option('-v', '--verbose', action='store_true', default=False, |
|
62 |
dest='verbose', help='Enable verbose logging') |
|
63 |
parser.add_option('--host', default=BROKER_HOST, dest='host', |
|
64 |
help='RabbitMQ host (default: %s)' % BROKER_HOST) |
|
65 |
parser.add_option('--port', default=BROKER_PORT, dest='port', |
|
66 |
help='RabbitMQ port (default: %s)' % BROKER_PORT, type='int') |
|
67 |
parser.add_option('--user', default=BROKER_USER, dest='user', |
|
68 |
help='RabbitMQ user (default: %s)' % BROKER_USER) |
|
69 |
parser.add_option('--password', default=BROKER_PASSWORD, dest='password', |
|
70 |
help='RabbitMQ password (default: %s)' % BROKER_PASSWORD) |
|
71 |
parser.add_option('--vhost', default=BROKER_VHOST, dest='vhost', |
|
72 |
help='RabbitMQ vhost (default: %s)' % BROKER_VHOST) |
|
73 |
parser.add_option('--queue', default=CONSUMER_QUEUE, dest='queue', |
|
74 |
help='RabbitMQ queue (default: %s)' % CONSUMER_QUEUE) |
|
75 |
parser.add_option('--exchange', default=CONSUMER_EXCHANGE, dest='exchange', |
|
76 |
help='RabbitMQ exchange (default: %s)' % CONSUMER_EXCHANGE) |
|
77 |
parser.add_option('--key', default=CONSUMER_KEY, dest='key', |
|
78 |
help='RabbitMQ key (default: %s)' % CONSUMER_KEY) |
|
79 |
parser.add_option('--callback', default=None, dest='callback', |
|
80 |
help='Callback function to consume messages') |
|
81 |
parser.add_option('--test', action='store_true', default=False, |
|
82 |
dest='test', help='Produce a dummy message for testing') |
|
83 |
opts, args = parser.parse_args() |
|
84 |
|
|
85 |
if opts.verbose: |
|
86 |
DEBUG = True |
|
87 |
logging.basicConfig(format='%(asctime)s [%(levelname)s] %(name)s %(message)s', |
|
88 |
datefmt='%Y-%m-%d %H:%M:%S', |
|
89 |
level=logging.DEBUG if DEBUG else logging.INFO) |
|
90 |
logger = logging.getLogger('dispatcher') |
|
91 |
|
|
92 |
conn = BrokerConnection(hostname=opts.host, port=opts.port, |
|
93 |
userid=opts.user, password=opts.password, |
|
94 |
virtual_host=opts.vhost) |
|
95 |
if opts.test: |
|
96 |
publisher = Publisher(connection=conn, |
|
97 |
exchange=opts.exchange, routing_key=opts.key, |
|
98 |
exchange_type="topic") |
|
99 |
publisher.send({"test": "0123456789"}) |
|
100 |
publisher.close() |
|
101 |
conn.close() |
|
102 |
sys.exit() |
|
103 |
consumer = Consumer(connection=conn, queue=opts.queue, |
|
104 |
exchange=opts.exchange, routing_key=opts.key, |
|
105 |
exchange_type="topic") |
|
106 |
|
|
107 |
callback = None |
|
108 |
if opts.callback: |
|
109 |
cb = opts.callback.rsplit('.', 1) |
|
110 |
if len(cb) == 2: |
|
111 |
__import__(cb[0]) |
|
112 |
cb_module = sys.modules[cb[0]] |
|
113 |
callback = getattr(cb_module, cb[1]) |
|
114 |
|
|
115 |
def process_message(message_data, message): |
|
116 |
logger.debug('%s', message_data) |
|
117 |
if callback: |
|
118 |
callback(message_data) |
|
119 |
message.ack() |
|
120 |
|
|
121 |
consumer.register_callback(process_message) |
|
122 |
try: |
|
123 |
consumer.wait() |
|
124 |
except KeyboardInterrupt: |
|
125 |
pass |
|
126 |
|
Also available in: Unified diff