UnmatchedListener (Esper API Documentation)

```
public interface UnmatchedListener
```
Interface to receive notification from an engine that an event that has been sent into the engine or that has been generated via insert-into has not been matched to any statement, considering all started statement's event stream filter criteria (not considering where-clause and having-clauses).
Also see EPRuntime.setUnmatchedListener(UnmatchedListener).

All Methods Instance Methods Abstract Methods
Modifier and Type	Method and Description
`void`	`update(EventBean theEvent)` Called upon the engine encountering an event not matched to any of the event stream filters of any active statement.

Interface UnmatchedListener