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|Oracle GlassFish Server Message Queue 4.5 Administration Guide|
A Message Queue message is routed to its consumer clients by way of a physical destination on a message broker. The broker manages the memory and persistent storage associated with the physical destination and configures its behavior. The broker also manages memory at a system-wide level, to assure that sufficient resources are available to support all destinations.
Message delivery also involves the maintenance of state information needed by the broker to route messages to consumers and to track acknowledgements and transactions.
This chapter provides information needed to manage message delivery, and includes the following topics: