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WebSphere MQ queues

 

There are four types of queue object available in WebSphere MQ.

Local queue object

A local queue object identifies a local queue belonging to the queue manager to which the application is connected. All queues are local queues in the sense that each queue belongs to a queue manager and, for that queue manager, the queue is a local queue.

Remote queue object

A remote queue object identifies a queue belonging to another queue manager. This queue must be defined as a local queue to that queue manager. The information you specify when you define a remote queue object allows the local queue manager to find the remote queue manager, so that any messages destined for the remote queue go to the correct queue manager.

Before applications can send messages to a queue on another queue manager, have defined a transmission queue and channels between the queue managers, unless you have grouped one or more queue managers together into a cluster. For more information about clusters, see Remote administration using clusters.

Alias queue object

An alias queue allows applications to access a queue by referring to it indirectly in MQI calls. When an alias queue name is used in an MQI call, the name is resolved to the name of either a local or a remote queue at run time. This allows you to change the queues that applications use without changing the application in any way; you merely change the alias queue definition to reflect the name of the new queue to which the alias resolves.

An alias queue is not a queue, but an object that we can use to access another queue.

Model queue object

A model queue defines a set of queue attributes that are used as a template for creating a dynamic queue. Dynamic queues are created by the queue manager when an application issues an MQOPEN request specifying a queue name that is the name of a model queue. The dynamic queue that is created in this way is a local queue whose attributes are taken from the model queue definition. The dynamic queue name can be specified by the application, or the queue manager can generate the name and return it to the application.

Dynamic queues defined in this way can be temporary queues, which do not survive product restarts, or permanent queues, which do.

• Defining queues
  

• Queues used by WebSphere MQ
  

 

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Objects

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