ViatraQueryEngineLifecycleListener

```
public interface ViatraQueryEngineLifecycleListener
```
Listener interface for getting notification on changes in an ViatraQueryEngine. You can use it to remove any other listeners that you attached to matchers or the engine, or to handle matchers that are initialized after you started using the engine.

All Methods Instance Methods Abstract Methods
Modifier and Type	Method and Description
`void`	`engineBecameTainted(java.lang.String message, java.lang.Throwable t)` Called after the engine has become tainted due to a fatal error
`void`	`engineDisposed()` Called after the engine has been disposed
`void`	`engineWiped()` Called after the engine has been wiped
`void`	`matcherInstantiated(ViatraQueryMatcher<? extends IPatternMatch> matcher)` Called after a matcher is instantiated in the engine

Interface ViatraQueryEngineLifecycleListener