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## com.atomikos.finitestates
Interface FSMPreEnterListener

All Superinterfaces:
  EventListener

All Known Implementing Classes:
  CoordinatorImp, StateRecoveryManagerImp, VolatileStateRecoveryManager

    public interface FSMPreEnterListener

extends EventListener

A listener that wants to be notified BEFORE the new state is entered.

Method Summary
`void` | `preEnter(FSMEnterEvent e)` Called BEFORE the FSM enters the new state, so that the callee is sure that nobody has seen the new state yet.

Method Detail

### preEnter

    void preEnter(FSMEnterEvent e)
                  throws IllegalStateException

  Called BEFORE the FSM enters the new state, so that the callee is sure that nobody has seen the new state yet.

  Throws:
    `IllegalStateException` - on failure. The callee can use this to prevent the state change from happening.

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