Java Code Examples for com.google.common.cache.CacheLoader#from()

The following examples show how to use com.google.common.cache.CacheLoader#from() . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example 1
Source File: MetadataFactoryImpl.java    From Bats with Apache License 2.0 5 votes vote down vote up 
private static CacheLoader<Pair<Class<RelNode>, Class<Metadata>>,
    UnboundMetadata<Metadata>> loader(final RelMetadataProvider provider) {
  return CacheLoader.from(key -> {
    final UnboundMetadata<Metadata> function =
        provider.apply(key.left, key.right);
    // Return DUMMY, not null, so the cache knows to not ask again.
    return function != null ? function : DUMMY;
  });
}
Example 2
Source File: MetadataFactoryImpl.java    From Quicksql with MIT License 5 votes vote down vote up 
private static CacheLoader<Pair<Class<RelNode>, Class<Metadata>>,
    UnboundMetadata<Metadata>> loader(final RelMetadataProvider provider) {
  return CacheLoader.from(key -> {
    final UnboundMetadata<Metadata> function =
        provider.apply(key.left, key.right);
    // Return DUMMY, not null, so the cache knows to not ask again.
    return function != null ? function : DUMMY;
  });
}
Example 3
Source File: CachedSpecService.java    From feast with Apache License 2.0 5 votes vote down vote up 
public CachedSpecService(CoreSpecService coreService, StoreProto.Store store) {
  this.coreService = coreService;
  this.store = coreService.registerStore(store);

  Map<String, FeatureSetSpec> featureSets = getFeatureSetMap();
  featureToFeatureSetMapping =
      new ConcurrentHashMap<>(getFeatureToFeatureSetMapping(featureSets));
  CacheLoader<String, FeatureSetSpec> featureSetCacheLoader = CacheLoader.from(featureSets::get);
  featureSetCache =
      CacheBuilder.newBuilder().maximumSize(MAX_SPEC_COUNT).build(featureSetCacheLoader);
  featureSetCache.putAll(featureSets);
}
Example 4
Source File: CachedSimilarityMeasure.java    From metanome-algorithms with Apache License 2.0 5 votes vote down vote up 
private LoadingCache<UnorderedPair<T>, Double> createCache() {
	CacheLoader<UnorderedPair<T>, Double> loader = CacheLoader
		.from(similarityMeasure::calculateSimilarity);
	return CacheBuilder.newBuilder()
		.maximumSize(maximumSize)
		.build(loader);
}
Example 5
Source File: MetadataFactoryImpl.java    From calcite with Apache License 2.0 5 votes vote down vote up 
private static CacheLoader<Pair<Class<RelNode>, Class<Metadata>>,
    UnboundMetadata<Metadata>> loader(final RelMetadataProvider provider) {
  return CacheLoader.from(key -> {
    final UnboundMetadata<Metadata> function =
        provider.apply(key.left, key.right);
    // Return DUMMY, not null, so the cache knows to not ask again.
    return function != null ? function : DUMMY;
  });
}
Example 6
Source File: CollectingThresholdMap.java    From metanome-algorithms with Apache License 2.0 4 votes vote down vote up 
private LoadingCache<GreaterOrEqualCall, IntCollection> createCache() {
	CacheLoader<GreaterOrEqualCall, IntCollection> loader = CacheLoader
		.from(GreaterOrEqualCall::call);
	return CACHE_BUILDER.build(loader);
}