if (logger.isDebugEnabled()) {
            logger.debug("Initializing {}", this.getClass().getSimpleName());
        }
        fessConfig = ComponentUtil.getFessConfig();
        cache = CacheBuilder.newBuilder()
                .maximumSize(fessConfig.getSuggestPopularWordCacheSizeAsInteger().longValue())
                .expireAfterWrite(fessConfig.getSuggestPopularWordCacheExpireAsInteger().longValue(), TimeUnit.MINUTES)

                .getUserPrincipalLookupService()
                .lookupPrincipalByName(getUsername());
        ImmutableList<AclEntry> acl =
            ImmutableList.of(
                AclEntry.newBuilder()
                    .setType(ALLOW)
                    .setPrincipal(user)
                    .setPermissions(EnumSet.allOf(AclEntryPermission.class))
                    .setFlags(DIRECTORY_INHERIT, FILE_INHERIT)

                .createRemote(Repository.newBuilder()
                        .id("apache-snapshots")
                        .url("https://repository.apache.org/content/repositories/snapshots/")
                        .releases(RepositoryPolicy.newBuilder().enabled("false").build())
                        .snapshots(RepositoryPolicy.newBuilder().enabled("true").build())
                        .build());

     * @param type The filter type.
     * @return The created filter cache.
     */
    protected LoadingCache<String, List<Pattern>> createFilterCache(final String type) {
        return CacheBuilder.newBuilder()//
                .expireAfterWrite(filterCacheExpireAfterWrite, TimeUnit.SECONDS)//
                .build(new CacheLoader<String, List<Pattern>>() {

                    /**

      @Nullable DurationSpec refresh,
      @Nullable Strength keyStrength,
      @Nullable Strength valueStrength) {

    CacheBuilder<Object, Object> builder = CacheBuilder.newBuilder();
    if (concurrencyLevel != null) {
      builder.concurrencyLevel(concurrencyLevel);
    }
    if (initialCapacity != null) {
      builder.initialCapacity(initialCapacity);
    }

                && ComponentUtil.hasComponent("activityHelper");
    }

    private void buildScriptCache() {
        final Cache<String, CachedScript> oldCache = scriptCache;
        scriptCache = CacheBuilder.newBuilder()
                .maximumSize(scriptCacheSize)
                .removalListener((final RemovalNotification<String, CachedScript> notification) -> {
                    notification.getValue().close();
                })

             * resolveCoreExtension method which uses a CoreExtension
             * object instead of a Plugin as this makes no sense.
             */
            Plugin plugin = Plugin.newBuilder()
                    .groupId(interpolator.apply(extension.getGroupId()))
                    .artifactId(interpolator.apply(extension.getArtifactId()))
                    .version(interpolator.apply(extension.getVersion()))

 * CacheLoader<Key, Graph> loader = new CacheLoader<Key, Graph>() {
 *   public Graph load(Key key) throws AnyException {
 *     return createExpensiveGraph(key);
 *   }
 * };
 * LoadingCache<Key, Graph> cache = CacheBuilder.newBuilder().build(loader);
 * }
 *
 * <p>Since this example doesn't support reloading or bulk loading, if you're able to use lambda
 * expressions it can be specified even more easily:
 *
 * {@snippet :

 * CacheLoader<Key, Graph> loader = new CacheLoader<Key, Graph>() {
 *   public Graph load(Key key) throws AnyException {
 *     return createExpensiveGraph(key);
 *   }
 * };
 * LoadingCache<Key, Graph> cache = CacheBuilder.newBuilder().build(loader);
 * }
 *
 * <p>Since this example doesn't support reloading or bulk loading, it can also be specified much
 * more simply:
 *
 * {@snippet :

             * resolveCoreExtension method which uses a CoreExtension
             * object instead of a Plugin as this makes no sense.
             */
            Plugin plugin = Plugin.newBuilder()
                    .groupId(interpolator.apply(extension.getGroupId()))
                    .artifactId(interpolator.apply(extension.getArtifactId()))
                    .version(interpolator.apply(extension.getVersion()))