Method getAll

output/java_guava/1.4.19/LocalCache.java:4046–4087

(Iterable<? extends K> keys)

  }

  ImmutableMap<K, V> getAll(Iterable<? extends K> keys) throws ExecutionException {
    int hits = 0;
    int misses = 0;
    Map<K, V> result = Maps.newLinkedHashMap();
    Set<K> keysToLoad = Sets.newLinkedHashSet();
    for (K key : keys) {
      V value = get(key);
      if (!result.containsKey(key)) {
        result.put(key, value);
        if (value == null) {
          misses++;
          keysToLoad.add(key);
        } else {
          hits++;
        }
      }
    }
    try {
      if (!keysToLoad.isEmpty()) {
        try {
          Map<K, V> newEntries = loadAll(keysToLoad, defaultLoader);
          for (K key : keysToLoad) {
            V value = newEntries.get(key);
            if (value == null) {
              throw new InvalidCacheLoadException("loadAll failed to return a value for " + key);
            }
            result.put(key, value);
          }
        } catch (UnsupportedLoadingOperationException e) {
          // loadAll not implemented, fallback to load
          for (K key : keysToLoad) {
            misses--; // get will count this miss
            result.put(key, get(key, defaultLoader));
          }
        }
      }
      return ImmutableMap.copyOf(result);
    } finally {
      globalStatsCounter.recordHits(hits);
      globalStatsCounter.recordMisses(misses);
    }
  }

  /**
   * Returns the result of calling {@link CacheLoader#loadAll}, or null if {@code loader} doesn't