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## org.apache.commons.scxml
Interface SCXMLListener

All Known Implementing Classes:
  AbstractStateMachine.EntryListener, SimpleSCXMLListener, Tracer

public interface SCXMLListener

Listener interface for observable entities in the SCXML model. Observable entities include `SCXML` instances (subscribe to all entry, exit and transition notifications), `State` instances (subscribe to particular entry and exit notifications) and `Transition` instances (subscribe to particular transitions).

Method Summary
`void` | `onEntry(TransitionTarget state)` Handle the entry into a TransitionTarget.
`void` | `onExit(TransitionTarget state)` Handle the exit out of a TransitionTarget.
`void` | `onTransition(TransitionTarget from, TransitionTarget to, Transition transition)` Handle the transition.

Method Detail

### onEntry

    public void onEntry(TransitionTarget state)

  Handle the entry into a TransitionTarget.

  Parameters:
    `state` - The TransitionTarget entered

### onExit

    public void onExit(TransitionTarget state)

  Handle the exit out of a TransitionTarget.

  Parameters:
    `state` - The TransitionTarget exited

### onTransition

    public void onTransition(TransitionTarget from,
                             TransitionTarget to,
                             Transition transition)

  Handle the transition.

  Parameters:
    `from` - The source TransitionTarget
    `to` - The destination TransitionTarget
    `transition` - The Transition taken

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