/** {@inheritDoc} */
  @Override
  public Map<K, V> peekAll(
      @Nullable Collection<? extends K> keys, @Nullable Collection<GridCachePeekMode> modes)
      throws GridException {
    if (keys == null || keys.isEmpty()) return emptyMap();

    final Collection<K> skipped = new GridLeanSet<K>();

    final Map<K, V> map =
        !modes.contains(PARTITIONED_ONLY)
            ? peekAll0(keys, modes, ctx.tm().localTxx(), skipped)
            : new GridLeanMap<K, V>(0);

    if (map.size() != keys.size() && !modes.contains(NEAR_ONLY)) {
      map.putAll(
          dht.peekAll(
              F.view(
                  keys,
                  new P1<K>() {
                    @Override
                    public boolean apply(K k) {
                      return !map.containsKey(k) && !skipped.contains(k);
                    }
                  }),
              modes));
    }

    return map;
  }
  /** {@inheritDoc} */
  @Override
  public V peek(K key, @Nullable Collection<GridCachePeekMode> modes) throws GridException {
    V val = null;

    if (!modes.contains(PARTITIONED_ONLY)) {
      try {
        val = peek0(true, key, modes, ctx.tm().txx());
      } catch (GridCacheFilterFailedException ignored) {
        if (log.isDebugEnabled()) log.debug("Filter validation failed for key: " + key);

        return null;
      }
    }

    return val == null && !modes.contains(NEAR_ONLY) ? dht.peek(key, modes) : val;
  }