[jira] [Commented] (CAMEL-8246) ZipAggregationStrategy does not preserve headers

["Claus Ibsen (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CAMEL-8246?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14279934#comment-14279934 ] 

Claus Ibsen commented on CAMEL-8246:
------------------------------------

The aggregation strategy should not create a new exchange but reuse the existing. This is what others do, and also preservers the headers/properties from the 1st incoming exchange

> ZipAggregationStrategy does not preserve headers
> ------------------------------------------------
>
>                 Key: CAMEL-8246
>                 URL: https://issues.apache.org/jira/browse/CAMEL-8246
>             Project: Camel
>          Issue Type: Improvement
>    Affects Versions: 2.14.0
>            Reporter: Chris Pimlott
>            Assignee: Claus Ibsen
>            Priority: Minor
>              Labels: camel-zipfile
>             Fix For: 2.14.2, 2.15.0
>
>
> ZipAggregationStrategy does not preserve any headers from the aggregated exchanges.  This makes it difficult to do something like name the output zip file based on the correlation key:
> {code:xml}
>     <from uri="direct:input"/>
>     <aggregate strategyRef="zipStrategy" eagerCheckCompletion="true">
>       <correlationExpression>
>         <simple>${header[batchId]}</simple>
>       </correlationExpression>
>       <completionSize>
>         <simple>${header[batchSize]}</simple>
>       </completionSize>
>       <setHeader headerName="CamelFileName">
>         <simple>batch-${header[batchId]}.zip</simple>
>       </setHeader>
>       <to uri="direct:output"/>
>     </aggregate>
> {code}
> This behavior is inconsistent with other existing AggregationStrategies, including AggregationStrategyBeanAdapter, FlexibleAggregationStrategy, UseLatestAggregationStrategy, and UseOriginalAggregationStrategy, which all use the first exchange received (or a copy of it) to initialize the aggregated exchange, hence preserving headers and properties, including those which may used to determine the correlation of related exchanges.
>  



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