DirContextHolder holder = contextLocal.get();
        if (holder != null) {
            holder.inc();
            return holder;
        }
        final Hashtable<String, String> env = envSupplier.get();
        try {
            holder = new DirContextHolder(new InitialDirContext(env));
            contextLocal.set(holder);
            return holder;
        } catch (final NamingException e) {

import org.codelibs.fess.exception.ResultOffsetExceededException;
import org.codelibs.fess.exception.SearchQueryException;
import org.codelibs.fess.helper.DocumentHelper;
import org.codelibs.fess.helper.QueryHelper;
import org.codelibs.fess.helper.SystemHelper;
import org.codelibs.fess.mylasta.direction.FessConfig;
import org.codelibs.fess.query.QueryFieldConfig;
import org.codelibs.fess.util.BooleanFunction;

    //                                                                       =============
    @Override
    public String asTableDbName() {
        return "request_header";
    }

    @Override
    public String xgetAliasName() {
        return "request_header";
    }

    // ===================================================================================

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;

    String CORS_ALLOW_ORIGIN = "CorsAllowOrigin";

    String API_DASHBOARD_RESPONSE_HEADER_LIST = "apiDashboardResponseHeaderList";

    String API_JSON_RESPONSE_HEADER_LIST = "apiJsonResponseHeaderList";

    String API_GSA_RESPONSE_HEADER_LIST = "apiGsaResponseHeaderList";

    String SMB_AVAILABLE_SID_TYPES = "smbAvailableSidTypes";