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batchSize

100

The in batch size. This is the number of incoming exchanges that is processed by the aggregator and when this threshold is reached the batch is completed and send. Camel 1.6.2/2.0: You can disable the batch size so the Aggregator is only triggered by timeout by setting the batchSize to 0 (or negative). In Camel 1.6.1 or older you can set the batchSize to a very large number to archive the same.

outBatchSize

0

Available as of Camel 1.5. : The out batch size. This is the number of exchanges currently aggregated in the AggregationCollection. When this threshold is reached the batch is completed and send. By default this option is disabled. The difference to the batchSize options is that this is for outgoing, so setting this size to e.g. 50 ensures that this batch will at maximum contain 50 exchanges when its sent.

batchTimeout

1000L

Timeout in millis. How long should the aggregator wait before its completed and sends whatever it has currently aggregated.

groupExchanges

false

Camel 2.-0: If enabled then Camel will group all aggregated Exchanges into a single combined org.apache.camel.impl.GroupedExchange holder class that holds all the aggregated Exchanges. And as a result only one Exchange is being sent out from the aggregator. Can be used to combine many incomming Exchanges into a single output Exchange without coding a custom AggregationStrategy yourself.