OkHttpClient uses a connection pool. Its job is to maintain a reference to all open connections. When an HTTP request is started, OkHttp will attempt to reuse an existing connection from the pool. If there are no existing connections, a new one is created and put into the connection pool. For HTTP/2, the connection can be reused immediately. For HTTP/1, the request must be completed before it can be reused.

Since HTTP requests frequently happen in parallel, connection pooling must be thread-safe....

            @Override
            public void init() {
                baseDir = new File(tempDir, "nonexistent/dir");
                if (baseDir.mkdirs()) {
                    logger.info("Created: {}", baseDir.getAbsolutePath());
                }
                if (!baseDir.isDirectory()) {
                    throw new FessSystemException("Not found: " + baseDir.getAbsolutePath());
                }

  /**
   * Invoked on a background thread after the referent has been garbage collected unless security
   * restrictions prevented starting a background thread, in which case this method is invoked when
   * new references are created.
   */
  void finalizeReferent();

 *
 * @since 4.0.0
 * @see RequestCache
 */
@Experimental
public interface RequestCacheFactory {

    /**
     * Creates a new RequestCache instance.
     * The created cache should be configured according to the current Maven session
     * and environment settings.
     *
     * @return A new RequestCache instance
     */
    RequestCache createCache();

elif [[ x"${cmd_type}" = "x" ]] ; then
  echo "No filetype."
  exit 1
else
  echo "Unsupported type: ${cmd_type}"
  exit 1
fi

if [[ ! -f ${output_file} ]] ; then
  echo "Thumbnail is not created."
  exit 1

Sie möchten aber auch, dass sie neue Artikel akzeptiert. Und wenn die Elemente vorher nicht vorhanden waren, werden diese Elemente erstellt und der HTTP-Statuscode 201 „Created“ zurückgegeben.

Um dies zu erreichen, importieren Sie `JSONResponse`, und geben Sie Ihren Inhalt direkt zurück, indem Sie den gewünschten `status_code` setzen:

     * @param userToolchainsSource The {@link Source} pointing to the user toolchains, must not be {@code null}
     * @throws ToolchainsBuilderException if the project cannot be created
     * @throws IllegalArgumentException if an argument is {@code null} or invalid
     * @see #build(ToolchainsBuilderRequest)
     */
    @Nonnull
    default ToolchainsBuilderResult build(

Mas você também deseja aceitar novos itens. E quando os itens não existiam, ele os cria, e retorna o código de status HTTP 201 "Created.

Para conseguir isso, importe `JSONResponse` e retorne o seu conteúdo diretamente, definindo o `status_code` que você deseja:

{* ../../docs_src/additional_status_codes/tutorial001_an_py310.py hl[4,25] *}

   *
   * <p>When the underlying delegate throws an exception then this memoizing supplier will keep
   * delegating calls until it returns valid data.
   *
   * <p>If {@code delegate} is an instance created by an earlier call to {@code memoize}, it is
   * returned directly.
   */
  public static <T extends @Nullable Object> Supplier<T> memoize(Supplier<T> delegate) {
    if (delegate instanceof NonSerializableMemoizingSupplier

        : SetTestSuiteBuilder.using(keySetGenerator);
  }

  /**
   * To avoid infinite recursion, test suites with these marker features won't have derived suites
   * created for them.
   */
  enum NoRecurse implements Feature<@Nullable Void> {
    SUBMAP,
    DESCENDING;

    @Override
    public Set<Feature<? super @Nullable Void>> getImpliedFeatures() {
      return emptySet();