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From "Claus Ibsen (JIRA)" <j...@apache.org>
Subject [jira] Commented: (CAMEL-1550) Improve first user experience of a composed message processor
Date Mon, 18 May 2009 07:18:50 GMT

    [ https://issues.apache.org/activemq/browse/CAMEL-1550?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=51752#action_51752
] 

Claus Ibsen commented on CAMEL-1550:
------------------------------------

I have updated the wiki page with a note on the correlation expression using header(orderId).

The splitter already insert an INDEX and TOTAL headers and it has in fact a build in aggregator
as well. But since the EIP pattern indicate to use a splitter and aggregator Jonathan created
the sample according to this fact. However this build in aggregator is only useable for *inOut*
(request/reply) messaging.

We do have some rough ideas to improve the splitter, resequencer and aggregator in the future
so its aggregation can more easily be configured to use a sequence of exchanges generated
by a poller, eg. for instance a filer poller. So we can aggregate the files that was polled
by default.

 

> Improve first user experience of a composed message processor
> -------------------------------------------------------------
>
>                 Key: CAMEL-1550
>                 URL: https://issues.apache.org/activemq/browse/CAMEL-1550
>             Project: Apache Camel
>          Issue Type: Improvement
>          Components: camel-core, documentation, examples
>    Affects Versions: 2.0-M1
>            Reporter: Frank Schwarz
>             Fix For: 2.0.0
>
>
> With some little changes, the pattern "composed message processor" could be realized
more easily. I am proposing to let the splitter component by default insert on each of its
output-messages the message id of its input-message as a standardized header. The aggregator
component then should, if nothing else is specified, use this header as a correlation id for
the aggregation. So, the splitting-aggregation-stuff works out-of-the box.
> see also: http://www.nabble.com/Composed-Message-Processor-td23127178s22882.html

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