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From Claus Ibsen <>
Subject Re: GroupedExchangeAggregationStrategy not working with HawtDB
Date Thu, 01 Mar 2012 10:34:40 GMT

Then use a custom strategy, which can be persisted.
I will add a note on the wiki page about the limitations of

On Thu, Mar 1, 2012 at 1:21 AM, wattsc3 <> wrote:
> I'd been bashing my head against the wall trying to get the default
> aggregator (GroupedExchangeAggregationStrategy) working with HawtDB
> aggregator repo, trying to work out why the exchange came out had no
> properties until I found this on the help page.
> /"And it only persists the Message body and the Message headers. The
> Exchange properties are not persisted."
> /
> Give than GroupedExchangeAggregationStrategy does it by:
> /  "Aggregate all exchanges into a single combined Exchange holding all the
> aggregated exchanges in a java.util.List as a exchange property with the key
> org.apache.camel.Exchange.GROUPED_EXCHANGE."/
> So the question is, if these are the preferred solutions for aggregating why
> don't they work together. Does everyone just write their own aggregation
> strategy to store the list in the body instead of as a property?
> We need the persistence so the messages are recoverable.
> --
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Claus Ibsen
Twitter: davsclaus, fusenews
Author of Camel in Action:

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