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 (or between different parts of the same application). The applications can be running on the same platform, or on different platforms.
WebSphere MQ messages have two parts:
The format of the message descriptor is defined by WebSphere MQ. For a complete description of the message descriptor, see the WebSphere MQ Application Programming Reference manual.
The default maximum message length is 4 MB, although you can increase this to a maximum length of 100 MB (where 1 MB equals 1 048 576 bytes). In practice, the message length might be limited by:
It might take several messages to send all the information that an application requires.
Application programs send and receive messages using MQI calls.
For example, to put a message onto a queue, an application:
Another application can retrieve the message from the same queue by issuing an MQI MQGET call
For more information about MQI calls, see the WebSphere MQ Application Programming Reference.
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