MQMD

 

public class MQMD
extends Object

java.lang.Object
   |
   +----com.ibm.mq.MQMD
          

The MQMD class contains the control information that accompanies the application data when a message travels between the sending and receiving applications.

Character data in the message descriptor is in the character set of the queue manager to which the application is connected; this is given by the CodedCharSetId queue manager attribute. Numeric data in the message descriptor is in the native machine encoding (given by MQENC_NATIVE ).

If the sending and receiving queue managers use different character sets or encodings, the data in the message descriptor is converted automatically - it is not necessary for the receiving application to perform these conversions.

We can write an exit to convert an application's message data, which is invoked when an MQGET call retrieves the message.

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