import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.codelibs.core.lang.StringUtil;
import org.codelibs.fess.entity.PingResponse;
import org.codelibs.fess.helper.NotificationHelper;
import org.codelibs.fess.helper.SystemHelper;
import org.codelibs.fess.mylasta.direction.FessConfig;
import org.codelibs.fess.mylasta.mail.EsStatusPostcard;
import org.codelibs.fess.opensearch.client.SearchEngineClient;

import org.codelibs.fess.helper.CrawlingConfigHelper;
import org.codelibs.fess.helper.CrawlingInfoHelper;
import org.codelibs.fess.helper.DocumentHelper;
import org.codelibs.fess.helper.FileTypeHelper;
import org.codelibs.fess.helper.LabelTypeHelper;
import org.codelibs.fess.helper.PathMappingHelper;
import org.codelibs.fess.helper.PermissionHelper;
import org.codelibs.fess.helper.SystemHelper;

 */
package org.codelibs.fess.helper;

import java.security.SecureRandom;
import java.util.Random;

import org.apache.commons.lang3.RandomStringUtils;
import org.codelibs.core.lang.StringUtil;
import org.codelibs.fess.exception.InvalidAccessTokenException;
import org.codelibs.fess.util.ComponentUtil;

import jakarta.servlet.http.HttpServletRequest;

/**
 * The helper for access token.
 */

import java.util.concurrent.atomic.AtomicInteger;

import org.codelibs.fess.Constants;
import org.codelibs.fess.exception.JobProcessingException;
import org.codelibs.fess.helper.KeyMatchHelper;
import org.codelibs.fess.helper.ProcessHelper;
import org.codelibs.fess.helper.SystemHelper;
import org.codelibs.fess.thumbnail.ThumbnailManager;
import org.codelibs.fess.mylasta.direction.FessConfig;

import java.util.concurrent.atomic.AtomicInteger;

import org.codelibs.core.misc.DynamicProperties;
import org.codelibs.fess.Constants;
import org.codelibs.fess.exception.ContainerNotAvailableException;
import org.codelibs.fess.helper.SystemHelper;
import org.codelibs.fess.mylasta.direction.FessConfig;
import org.codelibs.fess.opensearch.client.SearchEngineClient;
import org.codelibs.fess.thumbnail.ThumbnailManager;

import org.codelibs.fess.helper.LabelTypeHelper;
import org.codelibs.fess.helper.PopularWordHelper;
import org.codelibs.fess.helper.RelatedContentHelper;
import org.codelibs.fess.helper.RelatedQueryHelper;
import org.codelibs.fess.helper.RoleQueryHelper;
import org.codelibs.fess.helper.SearchHelper;
import org.codelibs.fess.helper.SuggestHelper;
import org.codelibs.fess.helper.SystemHelper;

  private static final AtomicHelper ATOMIC_HELPER;

  static {
    AtomicHelper helper;
    Throwable thrownUnsafeFailure = null;
    Throwable thrownAtomicReferenceFieldUpdaterFailure = null;

    helper = VarHandleAtomicHelperMaker.INSTANCE.tryMakeVarHandleAtomicHelper();
    if (helper == null) {
      try {
        helper = new UnsafeAtomicHelper();

 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.helper;

import org.codelibs.core.concurrent.CommonPoolUtil;
import org.codelibs.core.lang.ThreadUtil;

/**
 * The abstract helper for configuration.
 *
 * This class provides a basic framework for managing configurations that can be reloaded.

import org.codelibs.fess.exception.InvalidQueryException;
import org.codelibs.fess.exception.ResultOffsetExceededException;
import org.codelibs.fess.helper.RelatedContentHelper;
import org.codelibs.fess.helper.RelatedQueryHelper;
import org.codelibs.fess.util.RenderDataUtil;
import org.lastaflute.taglib.function.LaFunctions;
import org.lastaflute.web.Execute;
import org.lastaflute.web.response.HtmlResponse;

/// tip

The *path operation* for `swagger_ui_redirect` is a helper for when you use OAuth2.

If you integrate your API with an OAuth2 provider, you will be able to authenticate and come back to the API docs with the acquired credentials. And interact with it using the real OAuth2 authentication.

Swagger UI will handle it behind the scenes for you, but it needs this "redirect" helper.

///