Keith Wall created QPID-7771:
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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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