Eclipse.org - Device Kit
In the Device Kit environment, application or agent refers to the code that uses a device to access the commands, measurements, and signals. Applications can instruct commands to execute. If an application registers with a command, the application receives notification each time the command is executed.
Applications can also register with a measurement and receive notification each time the value in the measurement changes. If an application registers interest in a signal, the application receives notification from the device each time the signal is received.
Applications read values from measurements by returning the last stored value or by executing a command that reads the actual value, if the hardware device supports this feature.
© Copyright 2001, 2007 IBM Corporation and others.