* including token-based authentication and JSON response handling.
 */
public abstract class FessApiAction extends FessBaseAction {

    /**
     * Default constructor.
     */
    public FessApiAction() {
        super();
    }

    /**
     * Message manager for handling internationalized messages and validation errors.

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.codelibs.fess.app.web.api.FessApiAction;
import org.codelibs.fess.exception.InvalidAccessTokenException;

/**
 * Abstract base class for admin API actions in Fess.
 * This class extends FessApiAction to provide admin-specific functionality
 * including enhanced access control for administrative operations.
 *