4.0

Notify Orchestrator of Events in the Plugged-In Technology
Event listeners implement the IPluginNotificationHandler interface from the Orchestrator plug-in API to
notify Orchestrator of events in the plugged-in technology.
The IPluginNotificationHandler interface defines methods that you implement in the event listener to notify
Orchestrator of changes in state of the objects that the event listener monitors in the plugged-in technology.
The SolarSystemEventListener class monitors objects in a SolarSystemRepository instance for changes in state
that the following methods cause:
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Planet.setCircumference(), that changes the circumference of a planet.
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Planet.setGravity(), that changes the gravity of a planet.
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Star.addPlanet(), that adds a planet to a star.
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Star.removePlanet(), that removes a planet from a star.
The events that the SolarSystemEventListener class monitors are all events that the solar system application
defines.
Prerequisites
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Set up the event listener implementation class.
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Declare a public class that implements the java.util.EventListener interface.
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Create an instance of the IPluginNotificationHandler interface.
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Register the event listener and the notification handler instances with the plugged-in technology.
Chapter 7 Developing Plug-Ins
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