*/

package com.google.common.eventbus.outside;

import static com.google.common.truth.Truth.assertWithMessage;

import com.google.common.eventbus.EventBus;
import com.google.common.eventbus.Subscribe;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.atomic.AtomicReference;
import junit.framework.TestCase;

/**
 * Test cases for {@code EventBus} that must not be in the same package.
 *

          catcher.getEvents());
    }
  }

  public void testToString() throws Exception {
    EventBus eventBus = new EventBus("a b ; - \" < > / \\ €");
    assertThat(eventBus.toString()).isEqualTo("EventBus{a b ; - \" < > / \\ €}");
  }

  /**
   * Tests that bridge methods are not subscribed to events. In Java 8, annotations are included on

          catcher.getEvents());
    }
  }

  public void testToString() throws Exception {
    EventBus eventBus = new EventBus("a b ; - \" < > / \\ €");
    assertThat(eventBus.toString()).isEqualTo("EventBus{a b ; - \" < > / \\ €}");
  }

  /**
   * Tests that bridge methods are not subscribed to events. In Java 8, annotations are included on

 */

package com.google.common.eventbus.outside;

import static com.google.common.truth.Truth.assertWithMessage;

import com.google.common.eventbus.EventBus;
import com.google.common.eventbus.Subscribe;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.atomic.AtomicReference;
import junit.framework.TestCase;

/**
 * Test cases for {@code EventBus} that must not be in the same package.
 *

    bus.register(catcher);

    // We post the event, but our Executor will not deliver it until instructed.
    bus.post(EVENT);

    List<String> events = catcher.getEvents();
    assertTrue("No events should be delivered synchronously.", events.isEmpty());

    // Now we find the task in our Executor and explicitly activate it.
    List<Runnable> tasks = executor.getTasks();

{* ../../docs_src/events/tutorial003_py310.py hl[22] *}

## Eventos alternativos (descontinuados) { #alternative-events-deprecated }

/// warning | Atenção

{* ../../docs_src/events/tutorial003_py310.py hl[22] *}

## Eventos Alternativos (obsoleto) { #alternative-events-deprecated }

/// warning | Advertencia

# Eventos Enviados pelo Servidor (SSE) { #server-sent-events-sse }

Você pode transmitir dados para o cliente usando Server-Sent Events (SSE).

Isso é semelhante a [Stream de JSON Lines](stream-json-lines.md), mas usa o formato `text/event-stream`, que é suportado nativamente pelos navegadores com a [`EventSource` API](https://developer.mozilla.org/en-US/docs/Web/API/EventSource).

/// info | Informação

Adicionado no FastAPI 0.135.0.

///

首先要注意的是，我们定义了一个带有 `yield` 的异步函数。这与带有 `yield` 的依赖项非常相似。

{* ../../docs_src/events/tutorial003_py310.py hl[14:19] *}

这个函数在 `yield` 之前的部分，会在应用启动前执行。

剩下的部分在 `yield` 之后，会在应用完成后执行。

### 异步上下文管理器 { #async-context-manager }

如你所见，这个函数有一个装饰器 `@asynccontextmanager`。

它将函数转化为所谓的“**异步上下文管理器**”。

{* ../../docs_src/events/tutorial003_py310.py hl[1,13] *}

Параметр `lifespan` приложения `FastAPI` принимает асинхронный менеджер контекста, поэтому мы можем передать ему наш новый асинхронный менеджер контекста `lifespan`.

{* ../../docs_src/events/tutorial003_py310.py hl[22] *}

## Альтернативные события (устаревшие) { #alternative-events-deprecated }

/// warning | Предупреждение