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https://issues.apache.org/jira/browse/BEAM-8513?focusedWorklogId=337385&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-337385
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ASF GitHub Bot logged work on BEAM-8513:
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Author: ASF GitHub Bot
Created on: 01/Nov/19 15:48
Start Date: 01/Nov/19 15:48
Worklog Time Spent: 10m
Work Description: jbonofre commented on pull request #9937: [BEAM-8513]
Allow reads from exchange-bound queue without declaring the exchange
URL: https://github.com/apache/beam/pull/9937
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Issue Time Tracking
-------------------
Worklog Id: (was: 337385)
Time Spent: 2h 40m (was: 2.5h)
> RabbitMqIO: Allow reads from exchange-bound queue without declaring the
> exchange
> --------------------------------------------------------------------------------
>
> Key: BEAM-8513
> URL: https://issues.apache.org/jira/browse/BEAM-8513
> Project: Beam
> Issue Type: Improvement
> Components: io-java-rabbitmq
> Environment: testing with DirectRunner
> Reporter: Nick Aldwin
> Assignee: Jean-Baptiste Onofré
> Priority: Critical
> Fix For: 2.18.0
>
> Time Spent: 2h 40m
> Remaining Estimate: 0h
>
> The RabbitMqIO always declares an exchange if it is configured to read from
> it. This is problematic with pre-existing exchanges (a relatively common
> pattern), as there's no provided configuration for the exchange beyond
> exchange type. (We stumbled on this because RabbitMqIO always declares a
> non-durable exchange, which fails if the exchange already exists as a durable
> exchange)
>
> A solution to this would be to allow RabbitMqIO to read from an exchange
> without declaring it. This pattern is already available for queues via the
> `queueDeclare` flag. I propose an `exchangeDeclare` flag which preserves
> existing behavior except for skipping the call to `exchangeDeclare` before
> binding the queue to the exchange.
>
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