What is the meaning of 'durable' attribute for JMS Queue in JBoss 7 with HornetQ?

java jakarta-ee jms jboss7.x hornetq
acalypso picture acalypso · Dec 11, 2012 · Viewed 15.3k times · Source

During configuration of JMS queues on JBoss 7 with HornetQ (based on standalone-full.xml configuration) I noticed an attribute 'durable'.

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I browsed several sources and many of them stated queues are always 'durable', meaning the message will be always delivered, even in case of potential receivers being inactive at the time of send.

Does this attribute in JBoss 7 HornetQ refer to temporary queues? Or does this attribute refer to some kind of non-temporary non-durable queues?

Answer

Shashi picture Shashi · Dec 11, 2012

I feel the word "Durable" is more applicable to Topics than queues. A durable subscription is one where the publications for a subscriber are stored by the messaging provider when that subscriber is not running. Once the subscriber becomes active, these stored messages will be delivered to that subscriber. For non-Durable subscribers will not receive any publications if they are not active.

With respect to Queues, the messages are held in the queue till someone receives them or they expire. The messages can be persistent meaning they will survive restart of messaging provider and non-persistent where the messages are lost when messaging provider goes down.

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