Apache Camel unzip, process and aggregate not completing - apache-camel

Question

I am trying to process a zip file, which contains several files inside (all small, so working in memory is not a problem) that need to be transformed and zipped together again.
I managed to unzip, transform the files, but for some reason, the splitter is not completing, only using completionTimeout makes the aggregator to create the final zip archive.
Here's the route:
<route id="ZipFile">
<from uri="file:{{file.path.in}}?move=.done&moveFailed=.error&readLock=rename"/>
<setProperty propertyName="OriginalZipName">
<simple>${header.CamelFileName}</simple>
</setProperty>
<unmarshal>
<zipFile usingIterator="true"/>
</unmarshal>
<split streaming="true">
<simple>${body}</simple>
<log message="************ CamelSplitComplete = ${property.CamelSplitComplete}"/>
<to uri="direct:ProcessUnzippedFile"/>
<setHeader headerName="CamelFileName">
<simple>${property.OriginalZipName}</simple>
</setHeader>
<!-- Aggregate to zip -->
<aggregate strategyRef="zipAggregationStrategy" eagerCheckCompletion="true">
<correlationExpression>
<constant>true</constant>
</correlationExpression>
<completionPredicate>
<simple>${property.CamelSplitComplete}</simple>
</completionPredicate>
<setHeader headerName="CamelFileName">
<simple>${property.OriginalZipName}</simple>
</setHeader>
<to uri="file://{{file.path.out}}"/>
</aggregate>
</split>
</route>
Any idea what could be the issue?

Answer 1

The Camel Splitter provides a built- in aggregator, which makes it even easier to
aggregate split messages back into single outgoing message
You have to define the aggregation strategy in the split definition
<split strategyRef="zipAggregationStrategy">
Haven't tried it in XML but in Java DSL this is one of my examples that does exactly that.
.unmarshal(zipFile)
.split(bodyAs(Iterator.class),new ZipAggregationStrategy(true,true))
.streaming()
.stopOnException()
.to("direct:transform-ticket")
.end();