El cajero te da el número de tu turno.

<img src="/img/async/concurrent-burgers/concurrent-burgers-04.png" class="illustration">

Mientras esperas, vas con tu crush y eliges una mesa, te sientas y hablas con tu crush por un largo rato (ya que tus hamburguesas son muy sofisticadas y toman un tiempo en prepararse).

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import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import jcifs.smb.SmbException;

/**
 * Rate limiter for authentication attempts to prevent brute force attacks.
 *
 * Features:
 * - Per-account rate limiting
 * - Per-IP rate limiting
 * - Global rate limiting
 * - Exponential backoff for repeated failures
 * - Account lockout after threshold
 * - Automatic cleanup of old entries
 */

   * underlying model is a continuous function mapping storedPermits (from 0.0 to maxStoredPermits)
   * onto the 1/rate (i.e. intervals) that is effective at the given storedPermits. "storedPermits"
   * essentially measure unused time; we spend unused time buying/storing permits. Rate is
   * "permits / time", thus "1 / rate = time / permits". Thus, "1/rate" (time / permits) times

   * we change the rate.
   */
  public void testWeNeverGetABurstMoreThanOneSec() {
    RateLimiter limiter = RateLimiter.create(1.0, stopwatch);
    int[] rates = {1000, 1, 10, 1000000, 10, 1};
    for (int rate : rates) {
      int oneSecWorthOfWork = rate;
      stopwatch.sleepMillis(rate * 1000);
      limiter.setRate(rate);

   * we change the rate.
   */
  public void testWeNeverGetABurstMoreThanOneSec() {
    RateLimiter limiter = RateLimiter.create(1.0, stopwatch);
    int[] rates = {1000, 1, 10, 1000000, 10, 1};
    for (int rate : rates) {
      int oneSecWorthOfWork = rate;
      stopwatch.sleepMillis(rate * 1000);
      limiter.setRate(rate);

    public void formatRate(MessageBuilder builder, double rate) {
        // Handle invalid rates gracefully (including negative values)
        if (Double.isNaN(rate) || Double.isInfinite(rate) || rate < 0) {
            builder.append("? B/s");
            return;
        }

        ScaleUnit unit = ScaleUnit.getScaleUnit(Math.round(rate));
        double scaledRate = rate / unit.bytes();

        assertArrayEquals(largeTestData, decompressed);
    }

    @Test
    @DisplayName("Test compression ratio estimation")
    public void testCompressionRatioEstimation() {
        double ratio = compressionService.estimateCompressionRatio(testData, CompressionService.COMPRESSION_LZ77);
        assertTrue(ratio >= 0.0 && ratio <= 1.0);

    }

    /**
     * Increment error counter
     */
    public void incrementErrors() {
        errors.incrementAndGet();
    }

    /**
     * Get error rate (errors / total requests)
     *
     * @return error rate between 0.0 and 1.0
     */
    public double getErrorRate() {
        long total = requestsSent.get();
        if (total == 0)
            return 0.0;

E os **seus usuários** definem de alguma forma (em algum painel por exemplo) a **URL** que a sua aplicação deve enviar essas requisições.

Toda a **lógica** sobre como cadastrar as URLs para os webhooks e o código para enviar de fato as requisições cabe a você definir. Você escreve da maneira que você desejar no **seu próprio código**.

## Documentando webhooks com o FastAPI e OpenAPI { #documenting-webhooks-with-fastapi-and-openapi }