/**
* This method is invoked if the shouldAggregate method is called and returns true. Once this
* method returns an aggregated message the event group is removed from the router
*
* @param events the event group for this request
* @return an aggregated message
* @throws org.mule.routing.AggregationException if the aggregation fails. in this scenario the
* whole event group is removed and passed to the exception handler for this componenet
*/
protected UMOMessage aggregateEvents(EventGroup events) throws AggregationException {
List eventList = IteratorUtils.toList(events.iterator(), events.size());
UMOEvent firstEvent = (UMOEvent) eventList.get(0);
Collections.sort(eventList, SequenceComparator.getInstance());
ByteArrayOutputStream baos = new ByteArrayOutputStream(4096);
try {
for (Iterator iterator = eventList.iterator(); iterator.hasNext(); ) {
UMOEvent event = (UMOEvent) iterator.next();
baos.write(event.getMessageAsBytes());
}
UMOMessage message = new MuleMessage(baos.toByteArray(), firstEvent.getMessage());
message.setCorrelationGroupSize(-1);
message.setCorrelationSequence(-1);
return message;
} catch (Exception e) {
throw new AggregationException(events, firstEvent.getEndpoint(), e);
} finally {
IOUtils.closeQuietly(baos);
}
}
/**
* Reterns the conents of the message as a byte array.
*
* @return the conents of the message as a byte array
* @throws org.mule.umo.UMOException if the message cannot be converted into an array of bytes
*/
public byte[] getMessageAsBytes() throws UMOException {
return event.getMessageAsBytes();
}