[jira] [Assigned] (PROTON-1512) Expose the "aborted" flag for transfered deliveries

["Justin Ross (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/PROTON-1512?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Justin Ross reassigned PROTON-1512:
-----------------------------------

    Assignee: Andrew Stitcher

> Expose the "aborted" flag for transfered deliveries
> ---------------------------------------------------
>
>                 Key: PROTON-1512
>                 URL: https://issues.apache.org/jira/browse/PROTON-1512
>             Project: Qpid Proton
>          Issue Type: New Feature
>          Components: proton-c, proton-j
>            Reporter: Ted Ross
>            Assignee: Andrew Stitcher
>             Fix For: 0.18.0
>
>
> As we develop support for message streaming in Qpid Dispatch Router (i.e. frames for large multi-frame messages are forwarded to destinations as they arrive, before the complete message is received), there is a need to handle the case where a received message is never completed.
> The AMQP protocol has a provision for this in the "aborted" flag in the transfer performative.  If the router is in the process of streaming a large message from sender to receiver and the sender drops before completing the delivery, the router can send a transfer to the downstream receivers with the "aborted" flag set.  This would indicate that the message should not be processed and would not cause any framing errors on the link.
> Proton does not currently expose this capability in its API (There is a pn_link_abort in the C header file, but it is commented out and not implemented).
> In order to properly handle the failure cases for message streaming, this feature must be usable in Proton.



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