Basic concepts and key terms
Descriptions of the basic concepts and key terms you must know to complete the point to point scenario.
Basic concepts
IBM MQ enables applications to read and write messages to a queue. The application that reads the message is independent of the application that writes the message. It is not a requirement to have the two applications running at the same time. If no application is available to read the message it is queued on the IBM MQ queue until an application reads it.
Key terms
Here is a list of key terms about message queuing.| Term | Description |
|---|---|
| Queue managers | The queue manager is responsible for maintaining the queues it owns, and for storing all the messages it receives onto the appropriate queues. |
| Messages | A message is a string of bytes that is meaningful to the applications that use it. Messages are used to transfer information from one application program to another. The applications can be running on the same or on different computers. |
| Local queues | A local queue is a data structure used to store messages. The queue can be a normal queue or a transmission queue. A normal queue holds messages that are to be read by an application that is reading the message directly from the queue manager. A transmission queue holds messages that are in transit to another queue manager. |
| Remote queues | A remote queue is used to address a message to another queue manager. |
| Channels | Channels are use to send and receive messages between queue managers. |
| Listeners | Listeners are processes that accept network requests from other queue managers, or client applications, and start associated channels. |