How to use concurrency in jms topics using spring? Like for queues we can set maxConcurrentConsumers properties to the desired number. But if I do that for a JMS topic, it leads to concurrent consumption of the same message, which is not desirable.
Can somebody please point me in the right direction?
You are using the DefaultMessageListenerContainer in a wrong way. From the docs:
Note that dynamic scaling only really makes sense for a queue in the first place; for a topic, you will typically stick with the default number of 1 consumer, else you'd receive the same message multiple times on the same node.
To help your situation you may forward messages from the topic to a queue and let your consumers consume from this queue. If your JMS provider has some forwarding feature, than this is merely a configuration change to your application.
Well you said it yourself in a comment, but just to elaborate.
Inside your listener, you can still create multiple threads and execute the processing in an asynchronous way. As soon as you get your messages dispatch it to a asynchronous consumer. This is fairly easily implemented through some sort of executor for example.
I would really go for the guava's EventBus. It is so simple, yet so easy to set up and use. But this is your choice really.
