Sharing possible only if applications deterministic
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applications ARE deterministic or can be made so
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Copies of applications must be present everywhere
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but they are, being applets or downloaded via a push channel
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Environments must be identical
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Java VM takes care about this
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Initial state of a newcomer impossible to define
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not so for good OO design and object serialization mechanism
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Cannot maintain consistency among copies
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Difficult ? Impossible. Variety of sync mechanisms available
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Web model enables event broadcasting!
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