[ 
https://issues.apache.org/jira/browse/PROTON-1512?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16183008#comment-16183008
 ] 

ASF subversion and git services commented on PROTON-1512:
---------------------------------------------------------

Commit 58dfb4aa4424c0116443533639a42b7ceda774e7 in qpid-proton's branch 
refs/heads/master from [~aconway]
[ https://git-wip-us.apache.org/repos/asf?p=qpid-proton.git;h=58dfb4a ]

PROTON-1512: c examples: clean up examples and fix some issues.

All examples that receive messages use a consistent code sequence and error
reporting, all deal with aborted messages consistently. All receivers accumulate
messages in local buffer not in proton link buffers.

Fixed issues
- broker.c use per-link buffer for thread safety
- direct.c - wasn't accumulating messages in separate buffer

Added abort tests to example_test.py, using send-abort.c and verifying broker.c
and direct.c correctly report and drop aborted messages and continue to 
function.


> Expose the "aborted" flag for transferred deliveries
> ----------------------------------------------------
>
>                 Key: PROTON-1512
>                 URL: https://issues.apache.org/jira/browse/PROTON-1512
>             Project: Qpid Proton
>          Issue Type: New Feature
>          Components: proton-c
>            Reporter: Ted Ross
>            Assignee: Alan Conway
>              Labels: api
>             Fix For: proton-c-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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