Esta es la idea básica. Pero probablemente querrás encargarte de algunas cosas adicionales, como:

* Seguridad - HTTPS
* Ejecución en el arranque
* Reinicios
* Replicación (el número de procesos ejecutándose)
* Memoria
* Pasos previos antes de comenzar

    protected HashCode makeHash() {
      // End with a byte encoding the positive integer b mod 256.
      finalM ^= b << 56;
      processM(finalM);

      // Finalization
      v2 ^= 0xFFL;
      sipRound(d);
      return HashCode.fromLong(v0 ^ v1 ^ v2 ^ v3);
    }

    private void processM(long m) {
      v3 ^= m;
      sipRound(c);
      v0 ^= m;
    }

    private void sipRound(int iterations) {

        }
    }

    /**
     * Test rule processor chain behavior
     */
    public void test_ruleProcessorChain() {
        final List<String> executionOrder = new ArrayList<>();

        // Create custom processor that tracks execution
        ResponseProcessor processor = new ResponseProcessor() {
            @Override
            public void process(ResponseData responseData) {

 */
package org.codelibs.fess.crawler.processor;

import org.codelibs.fess.crawler.entity.ResponseData;

/**
 * The ResponseProcessor interface defines a contract for processing response data.
 * Implementations of this interface are responsible for handling the response data
 * obtained during a crawling process.
 */
public interface ResponseProcessor {

    /**
     * Processes the given response data.
     *

     */
    public DefaultResponseProcessor() {
        // Default constructor
    }

    /**
     * Processes response data based on HTTP status code and configured transformer.
     *
     * @param responseData the response data to process
     */
    @Override
    public void process(final ResponseData responseData) {
        if (isNotModified(responseData)) {

        if (available()) {
            process.run();
        } else {
            initProcesses.add(process);
        }
    }

    /**
     * Executes all initialization processes.
     * @param action The action to perform on each initialization process.
     */
    public static void doInitProcesses(final Consumer<? super Runnable> action) {
        try {

                }
            }
        }
        return true;
    }

    /**
     * Processes the response data using the appropriate rule processor.
     * @param urlQueue The URL queue entry.
     * @param responseData The response data to process.
     */
    protected void processResponse(final UrlQueue<?> urlQueue, final ResponseData responseData) {
        // get a rule

  }

  /**
   * Streams lines from a {@link Readable} object, stopping when the processor returns {@code false}
   * or all lines have been read and returning the result produced by the processor. Does not close
   * {@code readable}. Note that this method may not fully consume the contents of {@code readable}
   * if the processor stops processing early.
   *

* **Ejecutarse como un servidor** (al menos durante el proceso de adquisición del certificado) en la dirección IP pública asociada con el dominio.
    * Como dijimos anteriormente, solo un proceso puede estar escuchando en una IP y puerto específicos.
    * Esta es una de las razones por las que es muy útil cuando el mismo TLS Termination Proxy también se encarga del proceso de renovación del certificado.

import org.codelibs.fess.crawler.extractor.Extractor;
import org.codelibs.fess.crawler.extractor.impl.TikaExtractor;
import org.codelibs.fess.crawler.processor.ResponseProcessor;
import org.codelibs.fess.crawler.processor.impl.DefaultResponseProcessor;
import org.codelibs.fess.crawler.rule.Rule;
import org.codelibs.fess.crawler.rule.RuleManager;
import org.codelibs.fess.crawler.serializer.DataSerializer;