root / pithos / lib / queue.py @ c878682f
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1 | 8f815802 | Antony Chazapis | # Copyright 2012 GRNET S.A. All rights reserved.
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2 | 8f815802 | Antony Chazapis | #
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3 | 8f815802 | Antony Chazapis | # Redistribution and use in source and binary forms, with or
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4 | 8f815802 | Antony Chazapis | # without modification, are permitted provided that the following
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5 | 8f815802 | Antony Chazapis | # conditions are met:
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6 | 8f815802 | Antony Chazapis | #
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7 | 8f815802 | Antony Chazapis | # 1. Redistributions of source code must retain the above
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8 | 8f815802 | Antony Chazapis | # copyright notice, this list of conditions and the following
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9 | 8f815802 | Antony Chazapis | # disclaimer.
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10 | 8f815802 | Antony Chazapis | #
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11 | 8f815802 | Antony Chazapis | # 2. Redistributions in binary form must reproduce the above
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12 | 8f815802 | Antony Chazapis | # copyright notice, this list of conditions and the following
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13 | 8f815802 | Antony Chazapis | # disclaimer in the documentation and/or other materials
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14 | 8f815802 | Antony Chazapis | # provided with the distribution.
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15 | 8f815802 | Antony Chazapis | #
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16 | 8f815802 | Antony Chazapis | # THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
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17 | 8f815802 | Antony Chazapis | # OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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18 | 8f815802 | Antony Chazapis | # WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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19 | 8f815802 | Antony Chazapis | # PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
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20 | 8f815802 | Antony Chazapis | # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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21 | 8f815802 | Antony Chazapis | # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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22 | 8f815802 | Antony Chazapis | # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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23 | 8f815802 | Antony Chazapis | # USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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24 | 8f815802 | Antony Chazapis | # AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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25 | 8f815802 | Antony Chazapis | # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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26 | 8f815802 | Antony Chazapis | # ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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27 | 8f815802 | Antony Chazapis | # POSSIBILITY OF SUCH DAMAGE.
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28 | 8f815802 | Antony Chazapis | #
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29 | 8f815802 | Antony Chazapis | # The views and conclusions contained in the software and
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30 | 8f815802 | Antony Chazapis | # documentation are those of the authors and should not be
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31 | 8f815802 | Antony Chazapis | # interpreted as representing official policies, either expressed
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32 | 8f815802 | Antony Chazapis | # or implied, of GRNET S.A.
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33 | 8f815802 | Antony Chazapis | |
34 | 8f815802 | Antony Chazapis | import pika |
35 | 8f815802 | Antony Chazapis | import json |
36 | fa9cae7e | Antony Chazapis | import uuid |
37 | 8f815802 | Antony Chazapis | |
38 | 8f815802 | Antony Chazapis | from urlparse import urlparse |
39 | c878682f | Antony Chazapis | from hashlib import sha1 |
40 | c878682f | Antony Chazapis | from random import random |
41 | fa9cae7e | Antony Chazapis | from time import time |
42 | 8f815802 | Antony Chazapis | |
43 | 8f815802 | Antony Chazapis | |
44 | 8f815802 | Antony Chazapis | def exchange_connect(exchange, vhost='/'): |
45 | 8f815802 | Antony Chazapis | """Format exchange as a URI: rabbitmq://user:pass@host:port/exchange"""
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46 | 8f815802 | Antony Chazapis | parts = urlparse(exchange) |
47 | 8f815802 | Antony Chazapis | if parts.scheme != 'rabbitmq': |
48 | 8f815802 | Antony Chazapis | return None |
49 | 8f815802 | Antony Chazapis | if len(parts.path) < 2 or not parts.path.startswith('/'): |
50 | 8f815802 | Antony Chazapis | return None |
51 | 8f815802 | Antony Chazapis | exchange = parts.path[1:]
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52 | 8f815802 | Antony Chazapis | connection = pika.BlockingConnection(pika.ConnectionParameters( |
53 | 8f815802 | Antony Chazapis | host=parts.hostname, port=parts.port, virtual_host=vhost, |
54 | 8f815802 | Antony Chazapis | credentials=pika.PlainCredentials(parts.username, parts.password))) |
55 | 8f815802 | Antony Chazapis | channel = connection.channel() |
56 | 8f815802 | Antony Chazapis | channel.exchange_declare(exchange=exchange, type='topic', durable=True) |
57 | 8f815802 | Antony Chazapis | return (connection, channel, exchange)
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58 | 8f815802 | Antony Chazapis | |
59 | 8f815802 | Antony Chazapis | def exchange_close(conn): |
60 | 8f815802 | Antony Chazapis | connection, channel, exchange = conn |
61 | 8f815802 | Antony Chazapis | connection.close() |
62 | 8f815802 | Antony Chazapis | |
63 | 8f815802 | Antony Chazapis | def exchange_send(conn, key, value): |
64 | 8f815802 | Antony Chazapis | """Messages are sent to exchanges at a key."""
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65 | 8f815802 | Antony Chazapis | connection, channel, exchange = conn |
66 | 8f815802 | Antony Chazapis | channel.basic_publish(exchange=exchange, |
67 | 8f815802 | Antony Chazapis | routing_key=key, |
68 | 8f815802 | Antony Chazapis | body=json.dumps(value)) |
69 | 8f815802 | Antony Chazapis | |
70 | 8f815802 | Antony Chazapis | |
71 | 8f815802 | Antony Chazapis | def exchange_route(conn, key, queue): |
72 | 8f815802 | Antony Chazapis | """Set up routing of keys to queue."""
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73 | 8f815802 | Antony Chazapis | connection, channel, exchange = conn |
74 | 8f815802 | Antony Chazapis | channel.queue_declare(queue=queue, durable=True,
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75 | 8f815802 | Antony Chazapis | exclusive=False, auto_delete=False) |
76 | 8f815802 | Antony Chazapis | channel.queue_bind(exchange=exchange, |
77 | 8f815802 | Antony Chazapis | queue=queue, |
78 | 8f815802 | Antony Chazapis | routing_key=key) |
79 | 8f815802 | Antony Chazapis | |
80 | 8f815802 | Antony Chazapis | def queue_callback(conn, queue, cb): |
81 | 8f815802 | Antony Chazapis | |
82 | 8f815802 | Antony Chazapis | def handle_delivery(channel, method_frame, header_frame, body): |
83 | 8f815802 | Antony Chazapis | #print 'Basic.Deliver %s delivery-tag %i: %s' % (header_frame.content_type,
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84 | 8f815802 | Antony Chazapis | # method_frame.delivery_tag,
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85 | 8f815802 | Antony Chazapis | # body)
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86 | 8f815802 | Antony Chazapis | if cb:
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87 | 8f815802 | Antony Chazapis | cb(json.loads(body)) |
88 | 8f815802 | Antony Chazapis | channel.basic_ack(delivery_tag=method_frame.delivery_tag) |
89 | 8f815802 | Antony Chazapis | |
90 | 8f815802 | Antony Chazapis | connection, channel, exchange = conn |
91 | 8f815802 | Antony Chazapis | channel.basic_consume(handle_delivery, queue=queue) |
92 | 8f815802 | Antony Chazapis | |
93 | 8f815802 | Antony Chazapis | def queue_start(conn): |
94 | 8f815802 | Antony Chazapis | connection, channel, exchange = conn |
95 | 8f815802 | Antony Chazapis | channel.start_consuming() |
96 | fa9cae7e | Antony Chazapis | |
97 | fa9cae7e | Antony Chazapis | class Receipt(object): |
98 | 813e42e5 | Antony Chazapis | def __init__(self, client, user, resource, value, details={}): |
99 | c878682f | Antony Chazapis | self.eventVersion = '1.0' |
100 | c878682f | Antony Chazapis | self.occurredMillis = int(time() * 1000) |
101 | c878682f | Antony Chazapis | self.receivedMillis = self.occurredMillis |
102 | c878682f | Antony Chazapis | self.clientID = client
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103 | c878682f | Antony Chazapis | self.userID = user
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104 | fa9cae7e | Antony Chazapis | self.resource = resource
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105 | fa9cae7e | Antony Chazapis | self.value = value
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106 | 813e42e5 | Antony Chazapis | self.details = details
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107 | c878682f | Antony Chazapis | hash = sha1() |
108 | c878682f | Antony Chazapis | hash.update(json.dumps([client, user, resource, value, details, random()]))
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109 | c878682f | Antony Chazapis | self.id = hash.hexdigest() |
110 | fa9cae7e | Antony Chazapis | |
111 | fa9cae7e | Antony Chazapis | def format(self): |
112 | fa9cae7e | Antony Chazapis | return self.__dict__ |