case <-ctx.Done(): // check if this context is cancelled (time is up? cancel() is called ?) return "", ctx.Err() case <-time.After(1 * time.Minute): } return "ZH/CN", nil} 输出为 12 cannot print greeting: context deadline exceededcannot print farewell: context canceled 程序...
// exit early if the context is cancelled iferr :=ctx.Err();err!=nil { tracing.MarkFailed(span,http.StatusRequestTimeout,err) returnnil,err } output :=&enginev1.CheckOutput{ RequestId:input.RequestId, ResourceId:input.Resource.Id, Actions:make(map[string]*enginev1.CheckOutput_ActionEffe...
if errors.Is(err, sarama.ErrClosedConsumerGroup) { return } log.Panicf("Error from consumer: %v", err) } // check if context was cancelled, signaling that the consumer should stop if ctx.Err() != nil { log.Printf("Context err from consumer: %v", ctx.Err()) return } consumer.r...
func WithCancel(parent Context) (ctx Context, cancel CancelFunc) func WithDeadline(parent Context, deadline time.Time) (Context, CancelFunc) func WithTimeout(parent Context, timeout time.Duration) (Context, CancelFunc) 1. 2. 3. 4. 5. 6. 7. Context接口 type Context interface { Deadline(...
// If no token is available, Wait blocks until one can be obtained // or its associated context.Context is canceled. // // The methods AllowN, ReserveN, and WaitN consume n tokens. type Limiterstruct { //maximum token, token num per second ...
Context, n int) (err error) { lim.mu.Lock() burst := lim.burst limit := lim.limit lim.mu.Unlock() if n > burst && limit != Inf { return fmt.Errorf("rate: Wait(n=%d) exceeds limiter's burst %d", n, burst) } // Check if ctx is already cancelled select { case <-ctx....
type Context interface { Deadline() (deadline time.Time, ok bool) Done() <-chan struct{} Err() error Value(key interface{}) interface{} } Here, Deadline: Returns the time when the context should be cancelled, together with a Boolean that is false when there is no deadline Done: Re...
()//WithTimeout returns a copy of parent whose Done channel is closed as soon as//parent.Done is closed, cancel is called, or timeout elapses. The new//Context's Deadline is the sooner of now+timeout and the parent's deadline, if//any. If the timer is still running, the ...
go语言编译器会自动在以标识符、数字字面量、字母字面量、字符串字面量、特定的关键字(break、continue、fallthrough和return)、增减操作符(++和--)、或者一个右括号、右方括号和右大括号(即)、]、})结束的非空行的末尾自动加上分号。 所以,要注意多行的写法问题,比如下面的写法是不对的。
func TestRetryCancelledContext(t *testing.T) { cancelledCtx, done := context.WithCancel(context.Background()) done() client := tc(). SetCommonRetryCount(2). SetCommonRetryBackoffInterval(1*time.Second, 5*time.Second) res, err := client.R().SetContext(cancelledCtx).Get("/") ...