root / snf-pithos-backend / pithos / backends / lib / rabbitmq / queue.py @ dc7159be
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# Copyright 2012 GRNET S.A. All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or
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# without modification, are permitted provided that the following
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# conditions are met:
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#
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# 1. Redistributions of source code must retain the above
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# copyright notice, this list of conditions and the following
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# disclaimer.
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#
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# 2. Redistributions in binary form must reproduce the above
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# copyright notice, this list of conditions and the following
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# disclaimer in the documentation and/or other materials
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# provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
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# OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
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# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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#
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# The views and conclusions contained in the software and
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# documentation are those of the authors and should not be
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# interpreted as representing official policies, either expressed
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# or implied, of GRNET S.A.
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import json |
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from hashlib import sha1 |
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from random import random |
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from time import time |
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from synnefo.lib.amqp import AMQPClient |
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class Message(object): |
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def __init__(self, client, user, instance, resource, value, details={}): |
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self.eventVersion = '1.0' |
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self.occurredMillis = int(time() * 1000) |
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self.receivedMillis = self.occurredMillis |
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self.clientID = client
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self.userID = user
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self.instanceID = instance
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self.resource = resource
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self.value = value
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self.details = details
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hash = sha1() |
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hash.update(json.dumps(
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[client, user, resource, value, details, random()])) |
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self.id = hash.hexdigest() |
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class Queue(object): |
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"""Queue.
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Required constructor parameters: hosts, exchange, client_id.
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"""
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def __init__(self, **params): |
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hosts = params['hosts']
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self.exchange = params['exchange'] |
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self.client_id = params['client_id'] |
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self.client = AMQPClient(hosts=hosts)
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self.client.connect()
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self.client.exchange_declare(exchange=self.exchange, |
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type='topic')
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def send(self, message_key, user, instance, resource, value, details): |
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body = Message( |
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self.client_id, user, instance, resource, value, details)
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self.client.basic_publish(exchange=self.exchange, |
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routing_key=message_key, |
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body=json.dumps(body.__dict__)) |
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def close(self): |
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self.client.close()
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