Class SimpleStatsCounter

output/java_guava/1.4.16/AbstractCache.java:224–299

A thread-safe StatsCounter implementation for use by Cache implementors. @since 10.0

  public static final class SimpleStatsCounter implements StatsCounter {
    private final LongAddable hitCount = LongAddables.create();
    private final LongAddable missCount = LongAddables.create();
    private final LongAddable loadSuccessCount = LongAddables.create();
    private final LongAddable loadExceptionCount = LongAddables.create();
    private final LongAddable totalLoadTime = LongAddables.create();
    private final LongAddable evictionCount = LongAddables.create();

    /**
     * Constructs an instance with all counts initialized to zero.
     */


    public SimpleStatsCounter() {}

    /**
     * @since 11.0
     */

    @Override
    public void recordHits(int count) {
      hitCount.add(count);
    }

    /**
     * @since 11.0
     */

    @Override
    public void recordMisses(int count) {
      missCount.add(count);
    }

    @Override
    public void recordLoadSuccess(long loadTime) {
      loadSuccessCount.increment();
      totalLoadTime.add(loadTime);
    }

    @Override
    public void recordLoadException(long loadTime) {
      loadExceptionCount.increment();
      totalLoadTime.add(loadTime);
    }

    @Override
    public void recordEviction() {
      evictionCount.increment();
    }

    @Override
    public CacheStats snapshot() {
      return new CacheStats(
        hitCount.sum(),
        missCount.sum(),
        loadSuccessCount.sum(),
        loadExceptionCount.sum(),
        totalLoadTime.sum(),