个人实现的某项目技术盘点（java方向）

整体架构

overall.png

执行流程

process.png

定时任务和执行引擎

• 针对单个线程，将HttpClient修改成单例。
• 针对多线程采用ThreadLocal拷贝HttpClient实例。
• 在做耗时较长（相对而言）的Http请求交互的时候，重新生成一个httpClient对象，而不是用类变量httpclient进行管理一个线程的所有http请求。
• 数据表更新操作采用异步方法。

代码样例

• 定时线程池

  @Bean
  public ScheduledExecutorFactoryBean suiteExecutorFactoryBean() {
      ScheduledExecutorFactoryBean executorFactoryBean = new ScheduledExecutorFactoryBean();
      executorFactoryBean.setThreadNamePrefix("monitor_thread_pool");
      executorFactoryBean.setPoolSize(10);
      return executorFactoryBean;
  }
  

  ​

• 类静态变量HttpClient

  private static ThreadLocal<CloseableHttpClient> httpClient = new ThreadLocal<CloseableHttpClient>() {
  
          @Override
          public CloseableHttpClient initialValue() {
              RequestConfig config = RequestConfig.custom()
                      .setSocketTimeout(10000)
                      .setConnectTimeout(10000)
                      .build();
  
              PoolingHttpClientConnectionManager cm = new PoolingHttpClientConnectionManager();
              cm.setMaxTotal(200);
              cm.setDefaultMaxPerRoute(100);
  
              HttpClientBuilder builder = HttpClients.custom();
              builder.setDefaultRequestConfig(config).setConnectionManager(cm);
              return builder.build();
          }
      };
  
  

  ​

• 重试机制

  // 如果重试，新建httpClient
  if (isRetry) {
      httpClientInstance = createHttpClient();
  } else {
      httpClientInstance = httpClient.get();
  }
  

  ​

• 异步方式更新数据表

  // 使用异步方式更新数据表
  final int finalResultCode = resultCode;
  final String finalOptResponseBody = finalResponseBody;
  final int finalFailedTime = failedTime;
  
  scheduledExecutorService.submit(new Runnable() {
      @Override
      public void run() {
          //最后更新服务接口表
          service.setState(finalResultCode);
          service.setResponseBody(finalOptResponseBody);
          service.setSampleTime(new Date());
          service.setFailedTime(finalFailedTime);
          serviceDao.save(service);
      }
  });
  

  ​