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From "Lorenz Quack (JIRA)" <j...@apache.org>
Subject [jira] [Reopened] (QPID-7606) Generalise Queue|Exchange#alternateExchange as alternateBinding
Date Thu, 21 Sep 2017 09:09:00 GMT

     [ https://issues.apache.org/jira/browse/QPID-7606?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Lorenz Quack reopened QPID-7606:
--------------------------------

I just noticed that the UI for choosing the alternative binding behaves a little bit weird.
The dropdown list has the aritificial entries {{-- Queues \-\-}} and {{\-\- Exchanges --}}.
When a user selects one of them the UI does not report any warning or error. Instead it silently
disables the alternative binding feature.

Alex suggested to potentially use [SelectOptGroups|https://gibbok.github.io/dijit-select-optgroup/].
That seems like a reasonable suggestion to me.

Maybe we could also add an artificial entry to explicitly disable the feature. Currently one
has to ignore the drop down list and manually delete the content of the field.

> Generalise Queue|Exchange#alternateExchange as alternateBinding
> ---------------------------------------------------------------
>
>                 Key: QPID-7606
>                 URL: https://issues.apache.org/jira/browse/QPID-7606
>             Project: Qpid
>          Issue Type: Improvement
>          Components: Java Broker
>            Reporter: Keith Wall
>            Assignee: Alex Rudyy
>             Fix For: qpid-java-broker-7.0.0
>
>         Attachments: alternate-binding.tar.gz
>
>
> Queues and exchanges should have something akin to an "alternate binding" rather than
an alternate exchange.  From this we can simplify the DLQ implementation to remove the need
for DLEs (or at worst have a single DLE).
> Alternate Bindings could be modelled as {{\{destination, arguments\}}}.  A supported
argument might be {{replacementRoutingKey}} which if set could direct the routing through
the alternate(s) (This is separate - see QPID-7771).
> This work includes:
> * changes to the model object themselves and the routing algorithms
> * update the configuration upgrades to remap Exchange#alternativeExchange and Queue#alternativeExchange
into the new model.
> * the facility for automatic creation of a DLQ should be retained but it can be simplified
to not create an DLE exchange.
> * On upgrade, existing users' DLQ/DLEs must be retained as is, that is, there is no requirement
to eliminate existing DLEs.  This is because we have no way to predict if the users made additional
changes to these objects.
> * update UI



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