Deserialize a queue header.

Create a new queue manager with the given configuration.

If a queue exceeds this size, it will be flushed to disk irrespectiveof the idle flush time.

If a short queue is dequeued less than this amount of time agoit is not eligible to be flushed to disk.

An item in a queue.

A Queue Manager keeps track of all open queues and is responsible forthe database backing the queues.

The configuration governing queues.

A queue is used to back a subscription, or a trunking (peering) link.

Details about a queue that are persisted to disk.