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## org.apache.tapestry5.services
Interface InvalidationListener

All Known Implementing Classes:
  ApplicationMessageCatalogObjectProvider, ComponentClassCacheImpl, ComponentClassResolverImpl, ComponentInstantiatorSourceImpl, DefaultDataTypeAnalyzer, MetaDataLocatorImpl, PageActivationContextCollectorImpl, PageLoaderImpl, PageSourceImpl, PropertyConduitSourceImpl, ResourceDigestManagerImpl, SRSCachingInterceptor, SRSCompressedCachingInterceptor, StackAssetRequestHandler, StringInternerImpl, TranslatorSourceImpl, ValueEncoderSourceImpl

    public interface InvalidationListener

Interface for objects that may cache information that can be invalidated. Invalidation occurs when external files, from which in-memory data is cached, is determined to have changed. Granularity is very limited; when any external file is found to have changed, the event is fired (with the expectation that the cleared cache will be repopulated as necessary).

Since:
  5.1.0.0
See Also:
  `InvalidationEventHub`

Method Summary
`void` | `objectWasInvalidated()` Invoked to indicate that some object is invalid.

Method Detail

### objectWasInvalidated

    void objectWasInvalidated()

  Invoked to indicate that some object is invalid. The receiver should clear its cache.

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