* <p>When {@code post} is called, all registered subscribers for an event are run in sequence, so
 * subscribers should be reasonably quick. If an event may trigger an extended process (such as a
 * database load), spawn a thread or queue it for later. (For a convenient way to do this, use an
 * {@link AsyncEventBus}.)
 *
 * <h2>Subscriber Methods</h2>
 *
 * <p>Event subscriber methods must accept only one argument: the event.
 *

    /** Array of supported file protocols for URL classification. */
    protected String[] fileProtocols = { "file:", "smb:", "smb1:", "ftp:", "storage:" };

    /** Queue to track the current XML element hierarchy during parsing. */
    protected LinkedList<String> tagQueue;

    /** List to store parsed label types for access control. */
    protected List<LabelType> labelList;

///

## Pasos Previos Antes de Iniciar { #previous-steps-before-starting }

Hay muchos casos en los que quieres realizar algunos pasos **antes de iniciar** tu aplicación.

Por ejemplo, podrías querer ejecutar **migraciones de base de datos**.

Pero en la mayoría de los casos, querrás realizar estos pasos solo **una vez**.

      }
      return ((SortedMap<C, V>) backingRowMap).lastKey();
    }

    transient @Nullable SortedMap<C, V> wholeRow;

    // If the row was previously empty, we check if there's a new row here every time we're queried.
    void updateWholeRowField() {
      if (wholeRow == null || (wholeRow.isEmpty() && backingMap.containsKey(rowKey))) {
        wholeRow = (SortedMap<C, V>) backingMap.get(rowKey);
      }
    }

```

### Sobrescribir el manejador de errores de `HTTPException` { #override-the-httpexception-error-handler }

De la misma manera, puedes sobrescribir el manejador de `HTTPException`.

Por ejemplo, podrías querer devolver un response de texto plano en lugar de JSON para estos errores:

{* ../../docs_src/handling_errors/tutorial004_py310.py hl[3:4,9:11,25] *}

/// note | Nota Técnica

```

### Sobrescreva o manipulador de erro `HTTPException` { #override-the-httpexception-error-handler }

Do mesmo modo, você pode sobrescrever o `HTTPException`.

Por exemplo, você pode querer retornar uma *response* em *plain text* ao invés de um JSON para os seguintes erros:

{* ../../docs_src/handling_errors/tutorial004_py310.py hl[3:4,9:11,25] *}

/// note | Detalhes Técnicos

```
~ mc admin config set alias/ heal
KEY:

    waiter1.start();
    waiter1.awaitWaiting();

    WaiterThread waiter2 = new WaiterThread(future);
    waiter2.start();
    waiter2.awaitWaiting();
    // The waiter queue should be waiter2->waiter1

    // This should wake up waiter1 and cause the waiter1 node to be removed.
    waiter1.interrupt();

    waiter1.join();
    waiter2.awaitWaiting(); // should still be blocked

Por ejemplo, podrías querer probar:

* [Speakeasy](https://speakeasy.com/editor?utm_source=fastapi+repo&utm_medium=github+sponsorship)
* [Stainless](https://www.stainless.com/?utm_source=fastapi&utm_medium=referral)

Por exemplo, você pode querer experimentar:

* [Speakeasy](https://speakeasy.com/editor?utm_source=fastapi+repo&utm_medium=github+sponsorship)
* [Stainless](https://www.stainless.com/?utm_source=fastapi&utm_medium=referral)