// Create different implementations
        SearchLogEvent event1 = new TestSearchLogEvent("id1", 1L, "type1");
        SearchLogEvent event2 = new NullSearchLogEvent();
        SearchLogEvent event3 = new EmptySearchLogEvent();

        // Test polymorphic behavior
        SearchLogEvent[] events = { event1, event2, event3 };

        for (SearchLogEvent event : events) {
            // All methods should be callable without exceptions

                .build();

        LogEvent event3 = Log4jLogEvent.newBuilder()
                .setLoggerName("third.logger")
                .setLevel(Level.ERROR)
                .setMessage(new SimpleMessage("test message 3"))
                .build();

        LogEvent result1 = policy.rewrite(event1);
        LogEvent result2 = policy.rewrite(event2);
        LogEvent result3 = policy.rewrite(event3);

        coordinatorHelper.addEventHandler("config_updated", event -> {
            receivedData.set(event.data);
            receivedInstanceId.set(event.instanceId);
        });

        final EventInfo event = new EventInfo();
        event.name = "config_updated";
        event.data = "web_config";
        event.instanceId = "sender@host1";
        coordinatorHelper.dispatchEvent(event);

	}
	err = DB.Table("events").AutoMigrate(&Event2{})
	if err != nil {
		t.Errorf("AutoMigrate err:%v", err)
	}

	DB.Table("events").Save(&Event2{})
	DB.Table("events").Save(&Event2{})
	DB.Table("events").Save(&Event2{})

	events := make([]*Event, 0)
	DB.Table("events").Find(&events)

	AssertEqual(t, 3, len(events))
	for _, v := range events {
		AssertEqual(t, v.ID, v.UID)
	}
}

### Evento `shutdown` { #shutdown-event }

Para adicionar uma função que deve ser executada quando a aplicação estiver encerrando, declare-a com o evento `"shutdown"`:

{* ../../docs_src/events/tutorial002_py310.py hl[6] *}

Aqui, a função de manipulador do evento `shutdown` escreverá uma linha de texto `"Application shutdown"` no arquivo `log.txt`.

/// info | Informação

### Evento `shutdown` { #shutdown-event }

Para añadir una función que debería ejecutarse cuando la aplicación se esté cerrando, declárala con el evento `"shutdown"`:

{* ../../docs_src/events/tutorial002_py310.py hl[6] *}

Aquí, la función manejadora del evento `shutdown` escribirá una línea de texto `"Application shutdown"` a un archivo `log.txt`.

/// info | Información

{* ../../docs_src/events/tutorial001_py310.py hl[8] *}

Bu durumda `startup` event handler fonksiyonu, "database" öğesini (sadece bir `dict`) bazı değerlerle başlatır.

Birden fazla event handler fonksiyonu ekleyebilirsiniz.

Ve tüm `startup` event handler’ları tamamlanmadan uygulamanız request almaya başlamaz.

### `shutdown` eventi { #shutdown-event }

SSE é um padrão para transmitir dados do servidor para o cliente via HTTP.

Cada evento é um pequeno bloco de texto com “campos” como `data`, `event`, `id` e `retry`, separados por linhas em branco.

Fica assim:

```
data: {"name": "Portal Gun", "price": 999.99}

data: {"name": "Plumbus", "price": 32.99}

```

# Server-Sent Events (SSE) { #server-sent-events-sse }

Puedes enviar datos en streaming al cliente usando **Server-Sent Events** (SSE).

Esto es similar a [Stream JSON Lines](stream-json-lines.md), pero usa el formato `text/event-stream`, que los navegadores soportan de forma nativa con la [`EventSource` API](https://developer.mozilla.org/en-US/docs/Web/API/EventSource).

/// info | Información

Añadido en FastAPI 0.135.0.

///

In this case, the `startup` event handler function will initialize the items "database" (just a `dict`) with some values.

You can add more than one event handler function.

And your application won't start receiving requests until all the `startup` event handlers have completed.

### `shutdown` event { #shutdown-event }

To add a function that should be run when the application is shutting down, declare it with the event `"shutdown"`: