SpringBoot监控Tomcat活动线程数来判断是否完成请求处理方式_开发_开发者

开发者 https://www.devze.com 2023-03-01 10:44 出处：网络作者：三分魔系

目录SpringBoot监控Tomcat活动线程数来判断是否完成请求处理编码实现测试Tomcat线程数占满而导致的线上事故事故表现形式排查过程分析原因解决办法总结SpringBoot监控Tomcat活动线程数来判断是否完成请求处理

SpringBoot监控Tomcat活动线程数来判断是否完成请求处理

最近项目中有一个需求，需要判断应用的请求是否已经处理完毕，想了一下，打算通过定时任务定时监控Tomcat的活动线程数来实现。

编码实现

新建一个SpringBoot工程，添加定时任务定时监控，代码如下：

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.web.embedded.tomcat.TomcatWebServer;
import org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component;

@Component
public class TomcatMonitor {
  private Logger logger = LoggerFactory.getwww.devze.comLogger(getClass());

  @Autowired
  ServletWebServerApplicationContext applicationContext;


  @Scheduled(cron = "*/1 * * * * ?")
  public void execute() {
    TomcatWebServer webServer = (TomcatWebServer) applicationContext.getWebServer();
    String tomcatInfo = webServer.getTomcat().getConnector().getProtocolHandler().getExecutor().toString();

    System.out.println("tomcatInfo: " + tomcatInfo);
  }

}

测试

新建一个测试请求类，代码如下：

import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bindjavascript.annotation.RestController;

import Java.util.concurrent.TimeUnit;

@RestController
public class TestController {

  @RequestMapping("/test")
  public String test() {
    try {
      TimeUnit.SECONDS.sleep(2);
    } catch (InterruptedException e) {
      e.printStackTrace();
    }
    System.out.println("complete OK");
    return "OK";
  }

}

启动项目：

tomcatInfo: org.apache.tomcat.util.threads.ThreadPoolExecutor@49355b92[Running, pool size = 10, active threads = 0, queued tasks = 0, completed tasks = 0]
tomcatInfo: org.apache.tomcat.util.threads.ThreadPoolExecutor@49355b92[Running, pool size = 10, active threads = 0, queued tasks = 0, completed tasks = 0]

访问测试接口，观察Tomcat线程池变化：

tomcatInfo: org.apache.tomcat.util.threads.ThreadPoolExecutor@49355b92[vMypqHxedwRunning, pool size = 10, active threads = 1, queued tasks = 0, comppyth开发者_C入门onleted tasks = 0]
complete OK
tomcatInfo: org.apache.tomcat.util.threads.ThreadPoolExecutor@49355b92[Running, pool size = 10, active threads = 0, queued tasks = 0, completed tasks = 2]

可以看到，当有请求处理时，Tomcat的活动线程数不为0，处理完成以后回归到0，所以可以通过活动线程数判断当前Tomcat是否有请求还在处理，当然，应用到实际业务中，还有需要完善的地方。