[CAMEL-8246] ZipAggregationStrategy does not preserve headers

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 2.14.0
• Fix Version/s: 2.14.2, 2.15.0
• Labels: camel-zipfile
• Estimated Complexity: Unknown
• Assignee: Claus Ibsen
• Reporter: Chris Pimlott
• Created: 15/Jan/15 00:48
• Updated: 16/Jan/15 07:46
• Resolved: 16/Jan/15 07:45

Description

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:

    <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>

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.

Issue Links

• is related to: CAMEL-7555 ZipAggregationStrategy does not preserve properties