Chapter 14. Messaging and queuing 363
manager. Transmission queues are transparent to the application. That is,
they are used internally by the queue manager initiation queue.
This is a local queue to which the queue manager writes (transparently to the
programmer) a trigger message when certain conditions are met on another
local queue, for example, when a message is put into an empty message
queue or in a transmission queue. Two MQSeries applications monitor
initiation queues and read trigger messages, the trigger monitor, and the
channel initiator. The
trigger manager can start applications, depending on
the message. The
channel initiator starts the transmission between queue
managers.
Dead-letter queue
A queue manager (QM) must be ab