Attributes of queues

 

Some of the attributes of a queue are specified when the queue is defined, and cannot be changed afterwards (for example, the type of the queue). Other attributes of queues can be grouped into those that can be changed:

• By the queue manager during the processing of the queue (for example, the current depth of a queue)

• Only by commands (for example, the text description of the queue)

• By applications, using the MQSET call (for example, whether or not put operations are allowed on the queue)

We can find the values of all the attributes using the MQINQ call.

The attributes that are common to more than one type of queue are:

QName

Name of the queue

QType

Type of the queue

QDesc

Text description of the queue

InhibitGet

Whether or not programs are allowed to get messages from the queue (although we can never get messages from remote queues)

InhibitPut

Whether or not programs are allowed to put messages on the queue

DefPriority

Default priority for messages put on the queue

DefPersistence

Default persistence for messages put on the queue

Scope (not supported on z/OS)

Controls whether an entry for this queue also exists in a name service

For a full description of these attributes, see the Application Programming Reference.

 

Parent topic:

Queues

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