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From "Rob Godfrey (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (QPID-5601) [Java Broker] The default exchange is not really an exchange
Date Fri, 07 Mar 2014 17:25:43 GMT

    [ https://issues.apache.org/jira/browse/QPID-5601?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13924078#comment-13924078

Rob Godfrey commented on QPID-5601:

bq. Is it possible we may have stored any bindings in the store for the default exchange (named
either <<default>>, "", or null), and need to get rid of or ignore them in future?

I think that that would already have been an issue in prior versions, so I think not (or if
it is a problem, then it will be for users of older versions too - as creating bindings on
the DefaultExchange resulted in exceptions being thrown).

> [Java Broker] The default exchange is not really an exchange
> ------------------------------------------------------------
>                 Key: QPID-5601
>                 URL: https://issues.apache.org/jira/browse/QPID-5601
>             Project: Qpid
>          Issue Type: Improvement
>          Components: Java Broker
>            Reporter: Rob Godfrey
>            Assignee: Rob Godfrey
>             Fix For: 0.27
> Although 0-x specifies a "no-name" default "exchange" that behaves like a direct exchange
where the queues are bound to the exchange with a binding-key equal to the queues name...
Given the advent of 1-0 it is perhaps more consistent to think of it as a "routing node" which
will take whatever is in the routing key of the inbound transfer and use that to route to
the appropriate destination (whether this be a queue or another node).
> As a first step to implementing this, we should change the implementation detail internally
such that the "default exchange" is not presented in the set of "Exchanges" and doesn't implement
the Exchange interface.
> For 0-x protocols we can "fake" it's existence as an exchange for operations such as
exchange declare / delete / bind / unbind / query

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