},
		HeaderSize: headerSize,
	}
	newCtx := ctx
	if globalBucketMonitor.IsThrottled(bucket, tgt.ARN) && objInfo.Size < minLargeObjSize {
		var cancel context.CancelFunc
		newCtx, cancel = context.WithTimeout(ctx, throttleDeadline)
		defer cancel()
	}
	r := bandwidth.NewMonitoredReader(newCtx, globalBucketMonitor, gr, opts)
	if objInfo.isMultipart() {

	drwm1 := NewDRWMutex(ds, "simplelock")
	ctx1, cancel1 := context.WithCancel(context.Background())
	if !drwm1.GetRLock(ctx1, cancel1, id, source, Options{Timeout: time.Second}) {
		panic("Failed to acquire read lock")
	}
	// fmt.Println("1st read lock acquired, waiting...")

	drwm2 := NewDRWMutex(ds, "simplelock")
	ctx2, cancel2 := context.WithCancel(context.Background())
	if !drwm2.GetRLock(ctx2, cancel2, id, source, Options{Timeout: time.Second}) {

)

func main() {
	// Create context that cancels on termination signal
	ctx, cancel := context.WithCancel(context.Background())
	sigChan := make(chan os.Signal, 1)
	signal.Notify(sigChan, os.Interrupt, syscall.SIGTERM)
	go func(sigChan chan os.Signal, cancel context.CancelFunc) {
		sig := <-sigChan
		log.Infof("Exit signal received: %s", sig)
		cancel()
	}(sigChan, cancel)

	rootCmd := cmd.GetCommand()

     */
    int getCreditCost ();


    /**
     * @param credits
     */
    void setRequestCredits ( int credits );


    /**
     * @return whether this is a cancel request
     */
    boolean isCancel ();


    /**
     * @return chained request
     */
    Request getNext ();


    /**
     * @return the response for this request
     */
    Response getResponse ();

	}
	return nil
}

// delete canceler from the map, cancel job if requested
func (j *BatchJobPool) canceler(jobID string, cancel bool) error {
	if j == nil {
		return errInvalidArgument
	}
	j.jmu.Lock()
	defer j.jmu.Unlock()
	if canceler, ok := j.jobCancelers[jobID]; ok {
		if cancel {
			canceler()
		}
	}
	if cancel {
		delete(j.jobCancelers, jobID)
	}
	return nil
}

    private void recordCompletion() {
      if (incompleteOutputCount.decrementAndGet() == 0 && wasCancelled) {
        for (ListenableFuture<? extends T> toCancel : inputFutures) {
          if (toCancel != null) {
            toCancel.cancel(shouldInterrupt);
          }
        }
      }
    }
  }

  /**

   * exception.
   *
   * @throws IllegalStateException when the call has already been executed.
   */
  fun enqueue(responseCallback: Callback)

  /** Cancels the request, if possible. Requests that are already complete cannot be canceled. */
  fun cancel()

  /**
   * Returns true if this call has been either [executed][execute] or [enqueued][enqueue]. It is an
   * error to execute a call more than once.
   */

Et les sections suivantes supposent que vous l'avez lu et que vous en connaissez les idées principales.

## Cours TestDriven.io

	if err != nil {
		atomic.AddInt64(&h.failedMessages, 1)
		return
	}
	// Delete the event from store.
	return h.store.Del(key)
}

// Cancel - cancels the target
func (h *Target) Cancel() {
	// If queuestore is configured, cancel it's context to
	// stop the replay go-routine.
	if h.store != nil {
		h.storeCtxCancel()
	}

	// Set logch to nil and close it.

			if ok {
				if (lg.Entry != log.Entry{}) {
					logs = append(logs, lg.Entry)
				}
			}
		}
	})
	sys.RUnlock()

	return
}

// Cancel - cancels the target
func (sys *HTTPConsoleLoggerSys) Cancel() {
}

// Type - returns type of the target
func (sys *HTTPConsoleLoggerSys) Type() types.TargetType {
	return types.TargetConsole
}