1 # -*- coding: utf-8 -*-
2 ##############################################################################
4 # pyrabbit, a Python library for easy playing with RabbitMQ
5 # Copyright (C) 2013 by Javier Sancho Fernandez <jsf at jsancho dot org>
7 # This program is free software: you can redistribute it and/or modify
8 # it under the terms of the GNU General Public License as published by
9 # the Free Software Foundation, either version 3 of the License, or
10 # (at your option) any later version.
12 # This program is distributed in the hope that it will be useful,
13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 # GNU General Public License for more details.
17 # You should have received a copy of the GNU General Public License
18 # along with this program. If not, see <http://www.gnu.org/licenses/>.
20 ##############################################################################
28 class TimeoutError(Exception):
31 class Connection(object):
32 def __init__(self, host):
34 self.open(host=self.host)
36 def open(self, host=None):
39 self.connection = pika.BlockingConnection(pika.ConnectionParameters(host=host))
40 self.channel = self.connection.channel()
41 self.callback_queue = None
45 self.connection.close()
47 def __getattr__(self, queue_name):
48 return Queue(self, queue_name)
50 def __getitem__(self, queue_name):
51 return self.__getattr__(queue_name)
53 def receive(self, queues=[], timeout=0):
60 while method is None and (time.time()-t_start < timeout or timeout <= 0):
62 method, properties, body = self.channel.basic_get(queues[i])
63 if i == len(queues) - 1:
69 raise TimeoutError(os.strerror(errno.ETIME))
71 return Message(self, method, properties, body)
75 def __init__(self, connection, queue_name):
76 self.connection = connection
77 self.queue_name = queue_name
78 self.connection.channel.queue_declare(queue=self.queue_name)
80 def receive(self, timeout=0):
81 return self.connection.receive(queues=[self.queue_name], timeout=timeout)
83 def send(self, body, wait_response=False, timeout=0):
87 corr_id = str(uuid.uuid4())
88 if self.connection.callback_queue is None:
89 self.connection.callback_queue = self.connection.channel.queue_declare(exclusive=True).method.queue
90 properties = pika.BasicProperties(
91 reply_to=self.connection.callback_queue,
92 correlation_id=corr_id,
95 properties = pika.BasicProperties()
97 self.connection.channel.basic_publish(exchange='',
98 routing_key=self.queue_name,
99 properties=properties,
104 response = self.connection.receive(queues=[self.connection.callback_queue], timeout=timeout)
109 class Message(object):
110 def __init__(self, connection, method, properties, body):
111 self.connection = connection
113 self.properties = properties
119 self.connection.channel.basic_ack(delivery_tag=self.method.delivery_tag)
122 def response(self, body):
123 if self.properties.reply_to:
124 self.connection.channel.basic_publish(exchange='',
125 routing_key=self.properties.reply_to,
126 properties=pika.BasicProperties(correlation_id=self.properties.correlation_id),