ctx, cancel := context.WithCancel(ctx)

	target := &WebhookTarget{
		id:         event.TargetID{ID: id, Name: "webhook"},
		args:       args,
		loggerOnce: loggerOnce,
		transport:  transport,
		cancel:     cancel,
		cancelCh:   ctx.Done(),
	}

	return target, nil

			return time.Now(), slowCaller(ctx)
		},
	)

	ctx, cancel := context.WithCancel(t.Context())
	cancel() // cancel context to test.

	_, err := cache.GetWithCtx(ctx)
	if !errors.Is(err, context.Canceled) {
		t.Fatalf("expected context.Canceled err, got %v", err)
	}

	ctx, cancel = context.WithCancel(t.Context())
	defer cancel()

	t1, err := cache.GetWithCtx(ctx)
	if err != nil {

	ctx := newContext(r, w, "ClusterCheckHandler")

	objLayer := checkHealth(w)
	if objLayer == nil {
		return
	}

	ctx, cancel := context.WithTimeout(ctx, globalAPIConfig.getClusterDeadline())
	defer cancel()

	opts := HealthOptions{
		Maintenance:    r.Form.Get("maintenance") == "true",
		DeploymentType: r.Form.Get("deployment-type"),
	}
	result := objLayer.Health(ctx, opts)

			c = &resp
		} else {
			rctx, cancel := context.WithTimeout(ctx, 5*time.Second)
			c, err = rpc.GetMetacacheListing(rctx, *o)
			cancel()
		}
		if err != nil {
			if errors.Is(err, context.Canceled) {
				// Context is canceled, return at once.
				// request canceled, no entries to return
				return entries, io.EOF
			}

// If any error is returned by the callback, the stream will be canceled.
// If the context is canceled, the stream will be canceled.
func (s *Stream) Results(next func(b []byte) error) (err error) {
	done := false
	defer func() {
		if s.cancel != nil {
			s.cancel(err)
		}

		if !done {
			// Drain channel.
			for range s.responses {
			}
		}
	}()
	doneCh := s.ctx.Done()
	for {

			key = key + etcdPathSeparator + ip
			ctx, cancel := context.WithTimeout(context.Background(), defaultContextTimeout)
			_, err = c.etcdClient.Put(ctx, key, string(bucketMsg))
			cancel()
			if err != nil {
				ctx, cancel = context.WithTimeout(context.Background(), defaultContextTimeout)
				c.etcdClient.Delete(ctx, key)
				cancel()
				return err
			}
		}
	}
	return nil
}

    inputFuture.cancel(true); // argument is ignored
    assertThrows(CancellationException.class, () -> resultFuture.get());
  }

  public void testFutureGetThrowsCancellationIfOutputCancelled() throws Exception {
    inputFuture.set(SLOW_OUTPUT_VALID_INPUT_DATA);
    outputFuture.cancel(true); // argument is ignored

    inputFuture.cancel(true); // argument is ignored
    assertThrows(CancellationException.class, () -> resultFuture.get());
  }

  public void testFutureGetThrowsCancellationIfOutputCancelled() throws Exception {
    inputFuture.set(SLOW_OUTPUT_VALID_INPUT_DATA);
    outputFuture.cancel(true); // argument is ignored

	if !deleteOpts.Immediate {
		// add deadlines for all non-immediate purges
		var cancel context.CancelFunc
		ctx, cancel = context.WithTimeout(ctx, globalDriveConfig.GetMaxTimeout())
		defer cancel()
	}

	_, err := storageDeleteFileRPC.Call(ctx, client.gridConn, &DeleteFileHandlerParams{
		DiskID:   *client.diskID.Load(),
		Volume:   volume,

   * write.
   *
   * 2. visibility of the writes to an afterDone() call triggered by cancel():
   *
   * Since these fields are non-final that means that TimeoutFuture is not being 'safely published',
   * thus a motivated caller may be able to expose the reference to another thread that would then
   * call cancel() and be unable to cancel the delegate.