final long startNanos = System.nanoTime();
    final Call call = client.newCall(request);

    // Schedule a job to cancel the call in 1 second.
    executor.schedule(() -> {
      System.out.printf("%.2f Canceling call.%n", (System.nanoTime() - startNanos) / 1e9f);
      call.cancel();
      System.out.printf("%.2f Canceled call.%n", (System.nanoTime() - startNanos) / 1e9f);
    }, 1, TimeUnit.SECONDS);

      printEvent("callEnd");
    }

    @Override public void callFailed(Call call, IOException ioe) {
      printEvent("callFailed");
    }

    @Override public void canceled(Call call) {
      printEvent("canceled");
    }
  }

      printEvent("callEnd");
    }

    @Override public void callFailed(Call call, IOException ioe) {
      printEvent("callFailed");
    }

    @Override public void canceled(Call call) {
      printEvent("canceled");
    }
  }