@VisibleForTesting
PerformanceCachingGoogleCloudStorage(
GoogleCloudStorage delegate,
PerformanceCachingGoogleCloudStorageOptions options,
PrefixMappedItemCache cache) {
super(delegate);
this.inferImplicitDirectoriesEnabled = options.isInferImplicitDirectoriesEnabled();
this.listCachingEnabled = options.isListCachingEnabled();
this.cache = cache;
}
/**
* Creates a wrapper around a GoogleCloudStorage instance, caching calls that create, update,
* remove, and query for GoogleCloudStorageItemInfo. Those cached copies are returned when
* requesting data through {@link GoogleCloudStorage#getItemInfo(StorageResourceId)} and {@link
* GoogleCloudStorage#getItemInfo(StorageResourceId)}. This provides faster access to recently
* queried data in the scope of this instance. Because the data is cached, modifications made
* outside of this instance may not be immediately reflected.
*
* @param delegate the {@link GoogleCloudStorage} instance to wrap and delegate calls to.
* @param options the options to configure this cache with.
*/
public PerformanceCachingGoogleCloudStorage(
GoogleCloudStorage delegate, PerformanceCachingGoogleCloudStorageOptions options) {
super(delegate);
this.inferImplicitDirectoriesEnabled = options.isInferImplicitDirectoriesEnabled();
this.listCachingEnabled = options.isListCachingEnabled();
// Create the cache configuration.
PrefixMappedItemCache.Config config = new PrefixMappedItemCache.Config();
config.setMaxEntryAgeMillis(options.getMaxEntryAgeMillis());
this.cache = new PrefixMappedItemCache(config);
}