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  • Preserving order off of JMS Topic/Queue

    I apologize in advance for not doing enough research, but just stumbled across a problem with a competing "ESB" software framework and might need a quick fix. Naturally, Spring Integration seems like it would be a good fit.

    Here's what we want to do:
    Receive messages off a JMS topic in the order that they were placed (we listen to an existing JMS topic)
    Place these messages onto an in-memory or JMS queue
    Have a singleton/single threaded POJO that reads the queue, preserving order (FIFO).

    This seems like it should be simple/doable, but the other framework is giving us fits. Can Spring Integration save my day?

    Thanks,

    Andy

  • #2
    In my experience with jms topics, they are not guaranteed to be ordered. If you instead used a jms queue to receive the messages, then they would be guaranteed to be ordered. Once you receive them into Spring Integration, they can be placed on a single-threaded direct channel to process them one at a time.

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