concept split message in category camel

This is an excerpt from Manning's book Camel in Action. Login to get full access to this book.

The Splitter EIP in Camel includes an aggregation feature that lets you recombine split messages into single outbound messages, while they’re being routed.

The Camel Splitter provides a built-in aggregator, which makes it even easier to aggregate split messages back into single outgoing messages. Figure 5.10 illustrates this principle, with the help of the ABC message example.

Figure 5.10 The Splitter has a built-in aggregator that can recombine split messages into a combined outgoing message.

This is an excerpt from Manning's book Camel in Action. Login to get full access to this book.

The Splitter EIP in Camel includes an aggregation feature that lets you recombine split messages into single outbound messages, while they are being routed.

The Camel Splitter provides a built-in aggregator, which makes it even easier to aggregate split messages back into single outgoing messages. Figure 8.10 illustrates this principle, with the help of the “ABC” message example.

Figure 8.10. The Splitter has a built-in aggregator that can recombine split messages into a combined outgoing message.

To combine the split messages back into a single combined message, you use the AggregationStrategy.

Listing 8.7. Combining split messages back into a single outgoing message

public class MyAggregationStrategy implements AggregationStrategy { public Exchange aggregate(Exchange oldExchange, Exchange newExchange) { if (oldExchange == null) { return newExchange; } String body = newExchange.getIn().getBody(String.class); String existing = oldExchange.getIn().getBody(String.class); oldExchange.getIn().setBody(existing + "+" + body); return oldExchange; } }