This field is optionally set when a message is sent
Important: When a message is sent, this field is ignored. After completion of the
Publish method, the field holds the expiration value set by the producer.
The value is in the format of a normal millis absolute time value in the Java programming language. which is the difference, measured in milliseconds, between a given time time and midnight, January 1, 1970 UTC. For an example of how to convert between Java millisecond timestamps and .NET times, see the API doc for
|MessageException||if JMS fails to set the message expiration due to some internal error.|