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8.5.2. Persistent Messages
A persistent message is a message that must not be lost, even if the broker fails.
When a message is marked as persistent and sent to a durable queue, it will be written to disk, and resent on restart if the broker fails or shutdowns.
Messages marked as persistent and sent to non-durable queues will not be persisted by the broker.
Note that messages sent using the JMS API are marked persistent by default. If you are sending a message using the JMS API to a durable queue, and do not wish to incur the overhead of persistence, set the message persistence to false.
Messages sent using the C++ API are not persistent by default. To mark a message persistent when using the C++ API, use
Message.setDurable(true) to mark a message as persistent.
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