The JMS API defines ten levels of priority value, with 0 as the lowest priority and 9 as the highest. Clients should consider priorities 0-4 as gradations of normal priority and priorities 5-9 as gradations of expedited priority. Priority is set to 4 by default.
Represents the message priority for this message producer; must be a value between 0 and 9
|MessageException||if JMS fails to get or set the priority due to some internal error.|