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What are the advantages of combination of topics and queues over conventional topics?

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  • Even if a consumer is offline, there will be no lost messages. ActiveMQ copies all messages to the queues that have been registered.
  • If a consumer is unable to handle a message, a dead letter queue will be put on. The consumer can be resolved and the message can be transferred to his own dedicated queue without impacting the other consumer.
  • To implement a load balancing mechanism we can register multiple instances of a consumer on a queue.

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