Class CacheBuilder

output/java_guava/1.4.13/CacheBuilder.java:146–914

A builder of LoadingCache and Cache instances having any combination of the following features: automatic loading of entries into the cache least-recently-used eviction when a maximum size is exceeded time-based expiration of entries, measured since last access o

@GwtCompatible(emulated = true)
public final class CacheBuilder<K, V> {
    private static final int DEFAULT_INITIAL_CAPACITY = 16;
    private static final int DEFAULT_CONCURRENCY_LEVEL = 4;
    private static final int DEFAULT_EXPIRATION_NANOS = 0;
    private static final int DEFAULT_REFRESH_NANOS = 0;


    static final Supplier<? extends StatsCounter> NULL_STATS_COUNTER = Suppliers.ofInstance(new StatsCounter() {
        @Override
        public void recordHits(int count) {}

        @Override
        public void recordMisses(int count) {}

        @Override
        public void recordLoadSuccess(long loadTime) {}

        @Override
        public void recordLoadException(long loadTime) {}

        @Override
        public void recordEviction() {}

        @Override
        public CacheStats snapshot() {
                                                                                                return EMPTY_STATS;
        }
                                                                                            });


    static final CacheStats EMPTY_STATS = new CacheStats(0, 0, 0, 0, 0, 0);


    static final Supplier<StatsCounter> CACHE_STATS_COUNTER = new Supplier<StatsCounter>() {
        @Override
        public StatsCounter get() {
                                                                  return new SimpleStatsCounter();
        }
                                                              };

    enum NullListener implements RemovalListener<Object, Object> {
    INSTANCE;

    @Override
    public void onRemoval(RemovalNotification<Object, Object> notification) {}
    }

    enum OneWeigher implements Weigher<Object, Object> {
    INSTANCE;

    @Override
    public int weigh(Object key, Object value) {
    return 1;
    }
    }

    static final Ticker NULL_TICKER = new Ticker() {