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Posted to dev@qpid.apache.org by "Rob Godfrey (JIRA)" <ji...@apache.org> on 2016/12/02 15:48:58 UTC
[jira] [Commented] (QPID-7568) [Java Broker] [AMQP 1.0] support
Delayed Delivery with the JMS 2.0 client
[ https://issues.apache.org/jira/browse/QPID-7568?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15715451#comment-15715451 ]
Rob Godfrey commented on QPID-7568:
-----------------------------------
Given that delayed delivery has to be enabled on a per queue basis, I would think that we should probably not advertise the connection capability, but instead only on the links...
What about the case where a link is to the anonymous relay and some messages go to queues with delayed delivery enabled and some not? Also if we send to an exchange where multiple queues are bound? Should we reject the messages or just (silently) fail to obey the delay request?
> [Java Broker] [AMQP 1.0] support Delayed Delivery with the JMS 2.0 client
> -------------------------------------------------------------------------
>
> Key: QPID-7568
> URL: https://issues.apache.org/jira/browse/QPID-7568
> Project: Qpid
> Issue Type: Improvement
> Components: Java Broker
> Reporter: Robbie Gemmell
>
> QPID-7255 added a form of delayed delivery support for the Java broker and AMQP 0-X JMS client, with a qpid specific annotation in the case of AMQP 1.0. The AMQP 1.0 JMS client will also support this via addition of support for JMS 2.0 (QPIDJMS-207), but with some differences than in QPID-7255, and it would be good for the Java broker to support this too.
> The JMS 2.0 client can detect server support for the functionality in two ways:
> - by the server offering a "DELAYED_DELIVERY" connection capability
> - or, if the connection capability wasn't offered, by setting a desired capability of "DELAYED_DELIVERY" on the sending link attach and inspecting if it is offered in the response.
> If support for delivery delay was identified, when sending a message with a producer configured with a delivery delay, the message will carry a MessageAnnotation with _"x-opt-delivery-time"_ symbol key and long value representing the time at which the message can be delivered to receivers as the number of milliseconds since the epoch. If support was not identified, the send will fail in order to reflect that the requested delay/delivery-time can't be satisfied.
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