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From "Rob Godfrey (JIRA)" <qpid-...@incubator.apache.org>
Subject [jira] Commented: (QPID-1677) Provide the ability to publish synchronously
Date Tue, 24 Feb 2009 16:54:02 GMT

    [ https://issues.apache.org/jira/browse/QPID-1677?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12676334#action_12676334
] 

Rob Godfrey commented on QPID-1677:
-----------------------------------

The following in the JMS spec certainly implies that send() should be synchronous in AMQP
terms:

"If a failure occurs between the time a client commits its work on a Session and
the commit method returns, the client cannot determine if the transaction was
committed or rolled back. The same ambiguity exists when a failure occurs
between the non-transactional send of a PERSISTENT message and the return
from the sending method."




> Provide the ability to publish synchronously
> --------------------------------------------
>
>                 Key: QPID-1677
>                 URL: https://issues.apache.org/jira/browse/QPID-1677
>             Project: Qpid
>          Issue Type: Improvement
>          Components: Java Client
>    Affects Versions: M4
>            Reporter: Rajith Attapattu
>            Assignee: Rajith Attapattu
>             Fix For: M5
>
>
> In order for the producer to not replay the messages again (during failover) and prevent
duplicates,we need a way for the JMS client to sync on every publish. 
> To faciliate this, I have propose a System/Connection URLproperty called sync_publish={persistent|all}
which supercedes sync_persistent.
> (sync_persistent is deprecated but supported for a few releases with a warning printed
if used).
> In order to provide exactly-once semantics between a single JMS publisher-consumer pair
(when using AUTO_ACK on the consumer) we need to publish synchronously and ack synchronously
(QPID-1106).

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