【架构师训练营 - week7 -1】作业

public class HttpTest {

    public static void main(String[] arg) {

        int requestCount = 100;
        int parallelCount = 10;
        long[] responseTimes = new long[requestCount];

        for (int i = 0; i < requestCount; i++) {
            responseTimes[i] = parallelTesk(parallelCount, () -> {
                CloseableHttpClient httpClient = HttpClients.createDefault();
                HttpGet httpGet = new HttpGet("http://www.baidu.com");
                CloseableHttpResponse response;
                try {
                    response = httpClient.execute(httpGet);
                    if (response.getStatusLine().getStatusCode() == 200) {
                    }
                } catch (IOException e) {
                    e.printStackTrace();
                }
            });
        }

        Arrays.sort(responseTimes);

        long sum = 0;
        for (long time : responseTimes) {
            sum += time;
        }

        System.out.println("所有时间：" + Arrays.toString(responseTimes));
        System.out.println("平均响应时间：" + sum / responseTimes.length);
        System.out.println("95%响应时间：" + responseTimes[94]);
    }

    public static long parallelTesk(int threadNum, Runnable task) {
        final CountDownLatch startGate = new CountDownLatch(1);
        final CountDownLatch endGate = new CountDownLatch(threadNum);

        for (int i = 0; i < threadNum; i++) {
            Thread t = new Thread(() -> {
                try {
                    startGate.await();
                    try {
                        task.run();
                    } finally {
                        endGate.countDown();
                    }
                } catch (InterruptedException e) {

                }
            });

            t.start();
        }

        long start = System.currentTimeMillis();

        startGate.countDown();
        try {
            endGate.await();
        } catch (InterruptedException e) {
        }

        long end = System.currentTimeMillis();

        return end - start;
    }

}