Java serialization is one way to implement this, however, despite its simplicity of implementation, it has several drawbacks:

- **Performance:**
Java's built-in serialization mechanism is often slower compared to other serialization solutions.
This is due to Java's use of reflection and the need to maintain a lot of metadata.

- **Size of Serialized Data:**

     *
     * @param <T> The return type of the function
     * @param func The function to apply to the virtual host key
     * @param defaultValue The default value to return if no virtual host matches
     * @return The result of applying the function, or the default value
     */
    protected <T> T processVirtualHost(final Function<String, T> func, final T defaultValue) {

    /**
     * Executes the thumbnail purging job.
     * Removes thumbnail files that have exceeded the configured expiration time.
     *
     * @return a string containing the execution result with the number of deleted files or error message
     */
    public String execute() {
        try {
            final long count = ComponentUtil.getThumbnailManager().purge(getExpiry());

     * @param params the search request parameters including pagination, filters, etc.
     * @param userBean the optional user bean for access control and personalization
     * @return the search result containing matched documents and metadata
     */
    protected abstract SearchResult search(String query, SearchRequestParams params, OptionalThing<FessUserBean> userBean);

    /**
     * The message field.
     */
    protected static final String MESSAGE_FIELD = "message";

    /**
     * The result field.
     */
    protected static final String RESULT_FIELD = "result";

    private static final String DOC_ID_FIELD = "doc_id";

    /**
     * The GET method.
     */
    protected static final String GET = "GET";

    /**

    ),
    MIT(
        "MIT License",
        "https://opensource.org/licenses/MIT",
        listOf("The MIT License", "MIT License", "MIT"),
    );

    companion object {
        /** Lookup map built lazily from all [aliases] across all entries. */
        val byPomName: Map<String, License> by lazy {
            entries.flatMap { lic -> lic.aliases.map { alias -> alias to lic } }.toMap()
        }

import org.codelibs.fess.opensearch.config.exentity.CrawlingConfig;
import org.codelibs.fess.opensearch.config.exentity.FailureUrl;
import org.codelibs.fess.util.ComponentUtil;
import org.dbflute.cbean.result.PagingResultBean;
import org.dbflute.optional.OptionalEntity;

import jakarta.annotation.Resource;

/**
 * Service class for managing failure URLs that occur during web crawling.

    }

    /**
     * Creates a URL query string from request parameters that start with the specified prefix.
     *
     * @param key the request attribute key to cache the result
     * @param prefix the parameter name prefix to filter by
     * @return URL-encoded query string
     */
    private static String createQuery(final String key, final String prefix) {

     *
     * @param func the callback function to build XContent
     * @param mediaType the media type for the content builder
     * @return an OutputStream containing the built content, or an empty ByteArrayOutputStream if an error occurs
     */
    public static OutputStream getXContentBuilderOutputStream(final XContentBuilderCallback func, final MediaType mediaType) {

        if (!isAccessAllowed()) {
            return asJson(new ApiErrorResponse().message(getMessage(messages -> messages.addErrorsUnauthorizedRequest(GLOBAL)))
                    .status(Status.UNAUTHORIZED)
                    .result());
        }
        return super.godHandPrologue(runtime);
    }

    /**
     * Converts validation messages to a localized string representation for API responses.