public void testBulkLoad_loadAll() throws ExecutionException {
    IdentityLoader<Integer> backingLoader = identityLoader();
    CacheLoader<Integer, Integer> loader = bulkLoader(backingLoader);
    LoadingCache<Integer, Integer> cache = CacheBuilder.newBuilder().recordStats().build(loader);
    CacheStats stats = cache.stats();
    assertThat(stats.missCount()).isEqualTo(0);
    assertThat(stats.loadSuccessCount()).isEqualTo(0);

  public static <K, V> CacheLoader<K, V> asyncReloading(
      CacheLoader<K, V> loader, Executor executor) {
    checkNotNull(loader);
    checkNotNull(executor);
    return new CacheLoader<K, V>() {
      @Override
      public V load(K key) throws Exception {
        return loader.load(key);
      }

      @Override
      public ListenableFuture<V> reload(K key, V oldValue) {

// JoinLoaders - joins multiple loaders into a single loader. The returned
// loader will call each of the given loaders in order. If any of the loaders
// return an error, the returned loader will return that error.
func JoinLoaders(loaders ...MetricsLoaderFn) MetricsLoaderFn {
	return func(ctx context.Context, m MetricValues, c *metricsCache) error {
		for _, loader := range loaders {
			if err := loader(ctx, m, c); err != nil {
				return err
			}

  public void testBulkLoad_loadAll() throws ExecutionException {
    IdentityLoader<Integer> backingLoader = identityLoader();
    CacheLoader<Integer, Integer> loader = bulkLoader(backingLoader);
    LoadingCache<Integer, Integer> cache = CacheBuilder.newBuilder().recordStats().build(loader);
    CacheStats stats = cache.stats();
    assertThat(stats.missCount()).isEqualTo(0);
    assertThat(stats.loadSuccessCount()).isEqualTo(0);

    assertThat(loader.getLoadCount()).isEqualTo(expectedLoads);
    assertThat(loader.getReloadCount()).isEqualTo(expectedReloads);

    ticker.advance(1, MILLISECONDS);
    assertThat(cache.getUnchecked(0)).isEqualTo(1);
    assertThat(cache.getUnchecked(1)).isEqualTo(-1);
    assertThat(cache.getUnchecked(2)).isEqualTo(3);
    assertThat(loader.getLoadCount()).isEqualTo(expectedLoads);

    public static CoreExtensionEntry discoverFrom(ClassRealm loader) {
        Set<String> artifacts = new LinkedHashSet<>();
        Set<String> packages = new LinkedHashSet<>();

        try {
            Enumeration<URL> urls = loader.getResources(BUILDER.getExtensionDescriptorLocation());
            while (urls.hasMoreElements()) {

          ImmutableSet.of(
              new ResourceInfo(FILE, "left/some.txt", loader),
              new ResourceInfo(FILE, "left/sibling/another.txt", loader),
              new ResourceInfo(FILE, "right/another.txt", loader),
              new ResourceInfo(FILE, "right/sibling/some.txt", loader)),
          new ClassPath.LocationInfo(root.toFile(), loader).scanResources());
    } finally {
      deleteRecursivelyOrLog(root);
    }

     *
     * @param classLoader the class loader (must not be {@literal null})
     * @return an {@link Iterable} wrapping a {@link ClassLoaderIterator}
     */
    public static Iterable<ClassLoader> iterable(final ClassLoader classLoader) {
        return () -> new ClassLoaderIterator(classLoader);
    }

    /**
     * Constructs an instance.
     *
     * @param classLoader the class loader (must not be {@literal null})
     */

  private final CacheLoader<? super K, V> loader;
  private final RemovalListener<? super K, ? super V> removalListener;
  private final StatsCounter statsCounter;
  private final Ticker ticker;
  private final long expireAfterWrite;
  private final long expireAfterAccess;

  LocalCache(CacheBuilder<? super K, ? super V> builder, CacheLoader<? super K, V> loader) {
    this.loader = loader;
    this.removalListener = builder.removalListener;

 *
 * <p>This class can't depend on other Guava code. If we were to load this class in the same class
 * loader as the rest of Guava, this thread would keep an indirect strong reference to the class
 * loader and prevent it from being garbage collected. This poses a problem for environments where
 * you want to throw away the class loader. For example, dynamically reloading a web application or
 * unloading an OSGi bundle.
 *