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From "Keith Wall (JIRA)" <j...@apache.org>
Subject [jira] [Created] (QPID-7771) Allow exchange to exchange bindings to substitute the routing key
Date Tue, 09 May 2017 07:59:04 GMT
Keith Wall created QPID-7771:
--------------------------------

             Summary: Allow exchange to exchange bindings to substitute the routing key
                 Key: QPID-7771
                 URL: https://issues.apache.org/jira/browse/QPID-7771
             Project: Qpid
          Issue Type: Improvement
          Components: Java Broker
            Reporter: Keith Wall


QPID-6028 added support for exchange to exchange bindings.

This feature will have utility in aiding the migration of pub/sub
messaging application between the old Qpid JMS AMQP 0-x client and the Qpid JMS Client.  It
will allow topic publishers and subscribers to be
upgraded to the new client at different times, avoiding a big-bang upgrade and avoiding addressing
changes.

For a topic published by a Qpid JMS AMQP 0-x application to amq.topic/foo, an exchange to
exchange binding {{amq.topic/foo => foo}} where foo is a fanout instance will allow an
application using the Qpid JMS Client to subscribe successfully.

For a topic published by a Qpid JMS Client application to fanout exchange instance foo, and
exchange to exchange binding {{foo => amq.topic (arguments: replacement-routing-key=foo)}}
will allow an application using the Qpid JMS AMQP 0-x client to successfully subscribe.

QPID-6028 added support for exchange to exchange bindings.  The only addition is the support
for an special binding argument {{replacement-routing-key}}.  If this is present on the binding,
it will replace the routing key of the incoming message.




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