byte[] key = new byte[length];
        secureRandom.nextBytes(key);
        return key;
    }

    /**
     * Clear all stored keys
     */
    public void clearAllKeys() {
        checkNotClosed();

        log.info("Clearing all stored keys");

        // Wipe all raw keys
        for (Map.Entry<String, byte[]> entry : rawKeys.entrySet()) {
            Arrays.fill(entry.getValue(), (byte) 0);
        }

 * **ExchangeFinder** chooses which connection carries each exchange. Where possible it will use the same connection for all exchanges in a single call. It prefers reusing pooled connections over establishing new connections.      

#### Per-Connection Locks

                .renderWith(data -> data.register("installedArtifactItems", getAllInstalledArtifacts()))
                .useForm(DeleteForm.class);
    }

    /**
     * Retrieves all available artifacts from all plugin types.
     *
     * @return list of maps containing artifact information
     */
    public static List<Map<String, String>> getAllAvailableArtifacts() {

   * @since 22.0
   */
  void putCoalescing(Range<K> range, V value);

  /** Puts all the associations from {@code rangeMap} into this range map (optional operation). */
  void putAll(RangeMap<K, ? extends V> rangeMap);

  /** Removes all associations from this range map (optional operation). */
  void clear();

  /**
   * Removes all associations from this range map in the specified range (optional operation).
   *

                    results[index] = SystemUtil.getSearchEngineHttpAddress();
                });
            }

            // Start all threads
            for (Thread thread : threads) {
                thread.start();
            }

            // Wait for all threads to complete
            for (Thread thread : threads) {
                try {
                    thread.join();

    https://groups.google.com/g/google-web-toolkit-contributors/c/CqYH59Dt_rQ/m/uVGW1QdUsXUJ
    for details.

    The summary is that it ignores one file in favor of the other.
    util.concurrent, like nearly all our packages, has two .gwt.xml files: one
    for prod and one for tests. However, unlike our other packages, as of this
    writing it has test supersource but no prod supersource.

    assertTrue(range.intersect(GeneralRange.range(ORDERING, 1, OPEN, 2, OPEN)).isEmpty());
  }

  public void testFromRangeAll() {
    assertEquals(GeneralRange.all(Ordering.natural()), GeneralRange.from(Range.all()));
  }

  public void testFromRangeOneEnd() {
    for (BoundType endpointType : BoundType.values()) {
      assertEquals(
          GeneralRange.upTo(Ordering.natural(), 3, endpointType),

    private PurgeLogJob purgeLogJob;

    @Override
    public void setUp() throws Exception {
        super.setUp();
        purgeLogJob = new PurgeLogJob();
    }

    // Test all services execute successfully
    public void test_execute_allSuccess() {
        // Setup tracking variables
        final boolean[] deleteCrawlingInfoCalled = { false };
        final boolean[] deleteSearchLogCalled = { false };

      extends TestDoubleListGenerator {
    @Override
    protected List<Double> create(Double[] elements) {
      Double[] suffix = {Double.MIN_VALUE, Double.MAX_VALUE};
      Double[] all = concat(elements, suffix);
      return makeArray(all).subArray(0, elements.length).asList();
    }
  }

  @J2ktIncompatible
  @GwtIncompatible // used only from suite
  @AndroidIncompatible

    }
  }

  /**
   * Returns an unmodifiable <b>view</b> of the union of two sets. The returned set contains all
   * elements that are contained in either backing set. Iterating over the returned set iterates
   * first over all the elements of {@code set1}, then over each element of {@code set2}, in order,
   * that is not contained in {@code set1}.
   *