SpringBoot监控Tomcat活动线程数来判断是否完成请求处理方式

小诸哥 2023-02-28 22:14:44 0

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.getLogger(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.bind.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[Running, pool size = 10, active threads = 1, queued tasks = 0, completed 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。