Overview of WebSphere MQ

Ratings:
(4)
Views:0
Banner-Img
  • Share this blog:

Message in MQ

An MQSeries message is simply a collection of data sent by one program and intended for another program. The message consists of control information and application specific data. The control information is required in order to route the message between the programs to some extent. A message can be classed as persistent or non- persistent. A persistent message will survive a software or hardware crash / reboot, once communicated to a queue manager, whereas a non-persistent message will not survive. Persistent messages are used as part of the implementation of the assured delivery service supported by MQSeries.

Queue Managers

It is the queue manager that provides the queuing services to the application programs. A queue manager also provides additional functions so that administrators can create new queues, alter the properties of existing queues and control the operation of the queue manager. Many applications can make use of the queue manager's facilities at the same time, and they can be completely unrelated. It is possible to connect queue managers on different platforms together, this is achieved via a mechanism called channels.

Queues

Queues are named message repositories upon which messages accumulate until they are retrieved by programs that service those queues. Queues reside in, and are managed by, a queue manager. Programs access queues via the services provided by the queue manager. They can open a queue, put messages on it, get messages from it, and close the queue. It is also possible to programmatically set, and inquire about, the attributes of queues. Queues are either defined as local or remote. Local queues allow programs to both put messages on and get messages off, while remote queues only allow programs to put messages on. Remote queues are used in order to provide put access to queues that are local to another platform. Any message put onto a remote queue is automatically routed to the associated platform and local queue by the queue manager via the channels mechanism.

Channels

Channels are named links between platforms across which messages are transmitted. On the source platform the channel would be defined as a sender and on the destination platform as a receiver. It is the sender channel definition that contains the connectivity information, such as the destination platform's name or IP address. Channels must have the same name on both the source and destination platform.

Check out our Related Articles

 

You liked the article?

Like : 0

Vote for difficulty

Current difficulty (Avg): Medium

Recommended Courses

1/15

About Author
Authorlogo
Name
TekSlate
Author Bio

TekSlate is the best online training provider in delivering world-class IT skills to individuals and corporates from all parts of the globe. We are proven experts in accumulating every need of an IT skills upgrade aspirant and have delivered excellent services. We aim to bring you all the essentials to learn and master new technologies in the market with our articles, blogs, and videos. Build your career success with us, enhancing most in-demand skills in the market.