Using JMX with the Java Message Service - JMX in Action - page 314

Figure 13.1 Lighting control system with JMX management application

publish messages that provide the added functionality. The lighting controller
does not even know the added functionality exists—the MBean is truly a non-
intrusive solution.
For this example, you want to add functionality to the system when the home-
owner sends the MOVIELIGHTSOn command. The MOVIELIGHTSOn message sets the
lights to a certain level, and also tells the controller MBean to publish a command
to lower the projection screen and turn on the surround-sound system. Similarly,
upon receipt of the MOVIELIGHTSOff command, the MBean raises the projection
screen and turns off the surround-sound system.
Based on figure 13.1, this example needs one MBean, a JMS subscriber, and a
JMS publisher. For debugging capabilities, the JMS subscriber will act as the IR
signal transmitter that sends the final messages to the appropriate devices. For
our purposes, this process will print the messages to standard out. The JMS pub-
lisher will send the control messages that simulate the IR signal processor that
forwards commands received from the remote control.
The MBean will listen for commands published to the message bus of the
lighting control system. Upon receipt of a recognized command, the MBean will
determine the appropriate macro to execute and issue the messages needed to
complete it. Not only will the MBean perform valuable functions in the home