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java.lang.Object | +--coordination.Coordinator | +--spacewar.GameCoordinator
This aspect ensures synchronized access to methods of the Game in the presence of several threads. It uses the Coordinator class, from the AspectJ coordination library. (This case is right on the borderline of being too simple to use the coordination library, but we use it anyways to keep the similarity with the RegistrySynchronizer.) It uses a per-Game coordination scheme, so there is one instance of this class for each instance of the Game class. When this class is constructed, it registers appropriate mutexes and selfexes using the behavior inherited from Coordinator. The coordination constraints for the Game are simple. We just need to make sure that newShip and handleCollisions are mutually exclusive. That ensures that they we can't destroy a ship that has just been replaced.
Crosscut Summary | |
coordinatorCut() |
Constructor Summary | |
(package private) |
GameCoordinator()
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Methods inherited from class coordination.Coordinator |
addMutex, addSelfex, guardedEntry, guardedEntry, guardedEntry, guardedEntry, guardedEntryWithTimeout, guardedEntryWithTimeout, guardedEntryWithTimeout, guardedEntryWithTimeout, guardedExit, guardedExit, removeMutex, removeSelfex |
Methods inherited from class java.lang.Object |
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Crosscut Detail |
Constructor Detail |
GameCoordinator()
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