namespace: istio-system
spec: null
status:
  conditions:
  - lastTransitionTime: fake
    message: Resource accepted
    reason: Accepted
    status: "True"
    type: Accepted
  - lastTransitionTime: fake
    message: 'Failed to assign to any requested addresses: hostname "eastwestgateway-istio.istio-system.svc.domain.suffix"
      not found'
    reason: AddressNotUsable
    status: "False"
    type: Programmed
  listeners:

# Response - Change Status Code

You probably read before that you can set a default [Response Status Code](../tutorial/response-status-code.md){.internal-link target=_blank}.

But in some cases you need to return a different status code than the default.

## Use case

For example, imagine that you want to return an HTTP status code of "OK" `200` by default.

	logEventGenerator[trace.ThreadID]

	gStates map[trace.GoID]*gState[trace.ThreadID]
	threads map[trace.ThreadID]struct{}
}

func newThreadGenerator() *threadGenerator {
	tg := new(threadGenerator)
	rg := func(ev *trace.Event) trace.ThreadID {
		return ev.Thread()
	}
	tg.stackSampleGenerator.getResource = rg
	tg.logEventGenerator.getResource = rg
	tg.gStates = make(map[trace.GoID]*gState[trace.ThreadID])

// it's possible to accidentally advance without a
// GoStatus event.
//
// The situation is one in which it just so happens that
// an event on the frontier for a following generation
// has a sequence number exactly one higher than the last
// sequence number for e.g. a goroutine in the previous
// generation. The parser should wait to find a GoStatus
// event before advancing into the next generation at all.

# Response - Cambiar el Status Code

Probablemente ya has leído con anterioridad que puedes establecer un [Response Status Code](../tutorial/response-status-code.md){.internal-link target=_blank} por defecto.

Pero en algunos casos necesitas retornar un status code diferente al predeterminado.

## Casos de uso

Por ejemplo, imagina que quieres retornar un HTTP status code de "OK" `200` por defecto.

		gs := g.gStates[r.Scope.Goroutine()]
		gs.rangeEnd(ev.Time(), r.Name, ev.Stack(), ctx)
	}
}

func (g *goroutineGenerator) GoroutineTransition(ctx *traceContext, ev *trace.Event) {
	st := ev.StateTransition()
	goID := st.Resource.Goroutine()

	// If we haven't seen this goroutine before, create a new
	// gState for it.
	gs, ok := g.gStates[goID]
	if !ok {
		gs = newGState[trace.GoID](goID)
		g.gStates[goID] = gs
	}

import javax.annotation.Nullable;
import java.io.Serializable;

public class Status implements Serializable {
    @Nullable
    private final Long pid;
    private final String version;
    private final String status;

    public Status(Long pid, String version, String status) {
        this.pid = pid;
        this.version = version;
        this.status = status;
    }

    @Nullable
    public Long getPid() {

    reason: Programmed
    status: "True"
    type: Programmed
  listeners:
  - attachedRoutes: 1
    conditions:
    - lastTransitionTime: fake
      message: No errors found
      reason: Accepted
      status: "True"
      type: Accepted
    - lastTransitionTime: fake
      message: No errors found
      reason: NoConflicts
      status: "False"
      type: Conflicted

    **FastAPI** provee las mismas `starlette.responses` que `fastapi.responses` simplemente como una convención para ti, el desarrollador. Pero la mayoría de las respuestas disponibles vienen directamente de Starlette. Lo mismo con `status`.

## OpenAPI y documentación de API

!!! note "技術詳細"
    `from starlette.responses import JSONResponse` を利用することもできます。

    **FastAPI** は `fastapi.responses` と同じ `starlette.responses` を、開発者の利便性のために提供しています。しかし有効なレスポンスはほとんどStarletteから来ています。 `status` についても同じです。

## OpenAPIとAPIドキュメント

ステータスコードとレスポンスを直接返す場合、それらはOpenAPIスキーマ (APIドキュメント) には含まれません。なぜなら、FastAPIは何が返されるのか事前に知ることができないからです。