I have a general question about Apache Camel. I wasn't able to find whether the aggregator is transacted. If it is transacted, how the transactions are implemented and how fast the aggregation is?
Sending the messages into the aggregator can run in a transaction.
You would need a persistent store with the aggregator to let the outgoing messages act as a transaction. See the documentation about persistence http://camel.apache.org/aggregator2
For example there is a JDBC based and HawtDB (file based) persistent support out of the box. Its pluggable as you can also build your custom.
Camel in Action book chapter 8 and 9 convers this in much more details.
来源：https://stackoverflow.com/questions/6993149/apache-camel-transaction-in-routes