* `dnsStart(call, domainName)` → `dnsEnd(call, domainName, inetAddressList)`.
 *
 * Events are typically nested with this structure:
 *
 *  * call ([callStart], [callEnd], [callFailed])
 *    * proxy selection ([proxySelectStart], [proxySelectEnd])
 *    * dns ([dnsStart], [dnsEnd])
 *    * connect ([connectStart], [connectEnd], [connectFailed])

    }
  };

  ...
}
```

### Events with Failures

When an operation fails, a failure method is called. This is `connectFailed()` for failures while building a connection to the server, and `callFailed()` when the HTTP call fails permanently. When a failure happens it is possible that a `start` event won’t have a corresponding `end` event.

![Events Diagram](../assets/images/******@****.***)

      } else {
        check(toClose == null) // If we still have a connection we shouldn't be closing any sockets.
      }
    }

    val result = timeoutExit(e)
    if (e != null) {
      eventListener.callFailed(this, result!!)
    } else {
      eventListener.callEnd(this)
    }
    return result
  }

  /**
   * Remove this call from the connection's list of allocations. Returns a socket that the caller

	public fun cacheConditionalHit (Lokhttp3/Call;Lokhttp3/Response;)V
	public fun cacheHit (Lokhttp3/Call;Lokhttp3/Response;)V
	public fun cacheMiss (Lokhttp3/Call;)V
	public fun callEnd (Lokhttp3/Call;)V
	public fun callFailed (Lokhttp3/Call;Ljava/io/IOException;)V
	public fun callStart (Lokhttp3/Call;)V
	public fun canceled (Lokhttp3/Call;)V
	public fun connectEnd (Lokhttp3/Call;Ljava/net/InetSocketAddress;Ljava/net/Proxy;Lokhttp3/Protocol;)V

    override val timestampNs: Long,
    override val call: Call,
  ) : CallEvent() {
    override fun closes(event: CallEvent): Boolean = event is CallStart && call == event.call
  }

  data class CallFailed(
    override val timestampNs: Long,
    override val call: Call,
    val ioe: IOException,
  ) : CallEvent() {
    override fun closes(event: CallEvent): Boolean = event is CallStart && call == event.call
  }

        ) = TODO()

        override fun responseFailed(
          call: Call,
          ioe: IOException,
        ) = TODO()

        override fun callEnd(call: Call) = TODO()

        override fun callFailed(
          call: Call,
          ioe: IOException,
        ) = TODO()

        override fun canceled(call: Call) = TODO()
      }
    val none: EventListener = EventListener.NONE
  }

  @Test

	public fun cacheConditionalHit (Lokhttp3/Call;Lokhttp3/Response;)V
	public fun cacheHit (Lokhttp3/Call;Lokhttp3/Response;)V
	public fun cacheMiss (Lokhttp3/Call;)V
	public fun callEnd (Lokhttp3/Call;)V
	public fun callFailed (Lokhttp3/Call;Ljava/io/IOException;)V
	public fun callStart (Lokhttp3/Call;)V
	public fun canceled (Lokhttp3/Call;)V
	public fun connectEnd (Lokhttp3/Call;Ljava/net/InetSocketAddress;Ljava/net/Proxy;Lokhttp3/Protocol;)V

    assertThat(listener.recordedEventTypes()).containsExactly(
      "CallStart", "ConnectionAcquired", "RequestHeadersStart", "RequestHeadersEnd",
      "RequestBodyStart", "RequestBodyEnd", "ResponseFailed", "ConnectionReleased", "CallFailed",
    )
    listener.clearAllEvents()

    val response3 = client.newCall(request1).execute()
    assertThat(response3.body.string()).isEqualTo("abc")

HSPLokhttp3/EventListener$Companion$NONE$1;-><init>()V
HSPLokhttp3/EventListener;-><clinit>()V
HSPLokhttp3/EventListener;-><init>()V
HSPLokhttp3/EventListener;->callEnd(Lokhttp3/Call;)V
HSPLokhttp3/EventListener;->callFailed(Lokhttp3/Call;Ljava/io/IOException;)V
HSPLokhttp3/EventListener;->callStart(Lokhttp3/Call;)V
HSPLokhttp3/EventListener;->connectEnd(Lokhttp3/Call;Ljava/net/InetSocketAddress;Ljava/net/Proxy;Lokhttp3/Protocol;)V