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Options
The Idempotent Consumer has the following options:
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If you have running Camel in a clustered environment, a in memory idempotent repository doesn't work (see above). You can setup either a central database or use the idempotent consumer implementation based on the Hazelcast data grid. Hazelcast finds the nodes over multicast (which is default - configure Hazelcast for tcp-ip) and creates automatically a map based repository:
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HazelcastIdempotentRepository idempotentRepo = new HazelcastIdempotentRepository("myrepo");
from("direct:in").idempotentConsumer(header("messageId"), idempotentRepo).to("mock:out");
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See this little tutorial, how setup such an idempotent repository on two cluster nodes using Apache Karaf.
Available as of Camel 2.13.0
Another option for using Idempotent Consumer in a clustered environment is Infinispan. Infinispan is a data grid with replication and distribution clustering support. For additional information see camel-infinispan.
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