/**
* Performs a defensive copy of the exchange if needed
*
* @param exchange the exchange
* @return the defensive copy, or <tt>null</tt> if not needed (redelivery is not enabled).
*/
protected Exchange defensiveCopyExchangeIfNeeded(Exchange exchange) {
// only do a defensive copy if redelivery is enabled
if (redeliveryEnabled) {
return ExchangeHelper.createCopy(exchange, true);
} else {
return null;
}
}
/**
* Prepares the exchange for the next iteration
*
* @param exchange the exchange
* @param index the index of the next iteration
* @return the exchange to use
*/
protected Exchange prepareExchange(Exchange exchange, int index, Exchange original) {
if (copy) {
// use a copy but let it reuse the same exchange id so it appear as one exchange
// use the original exchange rather than the looping exchange (esp. with the async routing
// engine)
return ExchangeHelper.createCopy(original, true);
} else {
ExchangeHelper.prepareOutToIn(exchange);
return exchange;
}
}