root / snf-common / synnefo / lib / amqp.py @ 5f6ad491
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1 | 597e7eba | Christos Stavrakakis | # Copyright 2012 GRNET S.A. All rights reserved.
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2 | 597e7eba | Christos Stavrakakis | #
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3 | 597e7eba | Christos Stavrakakis | # Redistribution and use in source and binary forms, with or
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4 | 597e7eba | Christos Stavrakakis | # without modification, are permitted provided that the following
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5 | 597e7eba | Christos Stavrakakis | # conditions are met:
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6 | 597e7eba | Christos Stavrakakis | #
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7 | 597e7eba | Christos Stavrakakis | # 1. Redistributions of source code must retain the above
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8 | 597e7eba | Christos Stavrakakis | # copyright notice, this list of conditions and the following
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9 | 597e7eba | Christos Stavrakakis | # disclaimer.
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10 | 597e7eba | Christos Stavrakakis | #
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11 | 597e7eba | Christos Stavrakakis | # 2. Redistributions in binary form must reproduce the above
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12 | 597e7eba | Christos Stavrakakis | # copyright notice, this list of conditions and the following
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13 | 597e7eba | Christos Stavrakakis | # disclaimer in the documentation and/or other materials
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14 | 597e7eba | Christos Stavrakakis | # provided with the distribution.
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15 | 597e7eba | Christos Stavrakakis | #
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16 | 597e7eba | Christos Stavrakakis | # THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
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17 | 597e7eba | Christos Stavrakakis | # OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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18 | 597e7eba | Christos Stavrakakis | # WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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19 | 597e7eba | Christos Stavrakakis | # PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
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20 | 597e7eba | Christos Stavrakakis | # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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21 | 597e7eba | Christos Stavrakakis | # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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22 | 597e7eba | Christos Stavrakakis | # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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23 | 597e7eba | Christos Stavrakakis | # USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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24 | 597e7eba | Christos Stavrakakis | # AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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25 | 597e7eba | Christos Stavrakakis | # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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26 | 597e7eba | Christos Stavrakakis | # ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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27 | 597e7eba | Christos Stavrakakis | # POSSIBILITY OF SUCH DAMAGE.
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28 | 597e7eba | Christos Stavrakakis | #
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29 | 597e7eba | Christos Stavrakakis | # The views and conclusions contained in the software and
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30 | 597e7eba | Christos Stavrakakis | # documentation are those of the authors and should not be
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31 | 597e7eba | Christos Stavrakakis | # interpreted as representing official policies, either expressed
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32 | 597e7eba | Christos Stavrakakis | # or implied, of GRNET S.A.
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33 | 597e7eba | Christos Stavrakakis | |
34 | 597e7eba | Christos Stavrakakis | """ Module implementing connection and communication with an AMQP broker.
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35 | 597e7eba | Christos Stavrakakis |
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36 | db400d82 | Christos Stavrakakis | AMQP Client's instatiated by this module silenty detect connection failures and
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37 | 597e7eba | Christos Stavrakakis | try to reconnect to any available broker. Also publishing takes advantage of
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38 | 597e7eba | Christos Stavrakakis | publisher-confirms in order to guarantee that messages are properly delivered
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39 | 597e7eba | Christos Stavrakakis | to the broker.
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40 | 597e7eba | Christos Stavrakakis |
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41 | 597e7eba | Christos Stavrakakis | """
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42 | 597e7eba | Christos Stavrakakis | |
43 | 597e7eba | Christos Stavrakakis | from synnefo import settings |
44 | 597e7eba | Christos Stavrakakis | |
45 | db400d82 | Christos Stavrakakis | if settings.AMQP_BACKEND == 'puka': |
46 | db400d82 | Christos Stavrakakis | from amqp_puka import AMQPPukaClient as Client |
47 | db400d82 | Christos Stavrakakis | elif settings.AMQP_BACKEND == 'haigha': |
48 | db400d82 | Christos Stavrakakis | from amqp_haigha import AMQPHaighaClient as Client |
49 | db400d82 | Christos Stavrakakis | else:
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50 | db400d82 | Christos Stavrakakis | raise Exception('Unknown Backend %s' % settings.AMQP_BACKEND) |
51 | 597e7eba | Christos Stavrakakis | |
52 | 597e7eba | Christos Stavrakakis | |
53 | db400d82 | Christos Stavrakakis | class AMQPClient(object): |
54 | 597e7eba | Christos Stavrakakis | """
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55 | 597e7eba | Christos Stavrakakis | AMQP generic client implementing most of the basic AMQP operations.
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56 | 597e7eba | Christos Stavrakakis |
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57 | db400d82 | Christos Stavrakakis | This class will create an object of AMQPPukaClient or AMQPHaigha client
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58 | db400d82 | Christos Stavrakakis | depending on AMQP_BACKEND setting
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59 | 597e7eba | Christos Stavrakakis | """
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60 | db400d82 | Christos Stavrakakis | def __new__(cls, *args, **kwargs): |
61 | db400d82 | Christos Stavrakakis | return Client(*args, **kwargs) |