An introduction to MQ

In a nutshell, WebSphere MQ is an assured delivery mechanism, which consists of queues managed by Queue Managers. We can put messages onto, and retrieve messages from queues, and the movement of messages between queues is facilitated by components called Channels and Transmission Queues.

There are a number of fundamental points that we need to know about WebSphere MQ:

• All objects in WebSphere MQ are case sensitive

• We cannot read messages from a Remote Queue (only from a Local Queue)

• We can only put a message onto a Local Queue (not a Remote Queue)

It does not matter at this stage if you do not understand the above points, all will become clear in the following sections.

There are some standards regarding WebSphere MQ object names:

• Queue names, processes and Queue Manager names can have a maximum length of 48 characters

• Channel names can have a maximum length of 20 characters

• The following characters are allowed in names: A-Z, a-z, 0-9, and . / _ % symbols

• There is no implied...