Spring Boot 的监视器

Spring Boot 的监视器

此功能用来控制spring boot程序和查看程序信息

依赖

<dependency>

	<groupId>org.springframework.boot</groupId>

	<artifactId>spring-boot-starter-actuator</artifactId>

	<version>2.0.4.RELEASE</version>

</dependency>

<dependency>

    <groupId>org.springframework.boot</groupId>

    <artifactId>spring-boot-starter-web</artifactId>

</dependency>

配置

spring.datasource.url=jdbc:mysql://localhost:3306/mydb?useUnicode=true&characterEncoding=UTF-8&zeroDateTimeBehavior=convertToNull&allowMultiQueries=true&useSSL=false&allowPublicKeyRetrieval=true

spring.datasource.username=root

spring.datasource.password=123

spring.datasource.driver-class-name=com.mysql.jdbc.Driver

server.tomcat.uri-encoding=UTF-8

# 程序运行端口

server.port=8888

# 监视程序运行端口

management.server.port=8090

# 激活所有的内置Endpoints

management.endpoints.web.exposure.include=*

# 开启shutdown这个endpoint

management.endpoint.shutdown.enabled=true

书写监视控制器

package com.springlearn.learn.Controller;

import javax.servlet.http.HttpServletRequest;

import org.springframework.stereotype.Controller;

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

import org.springframework.web.bind.annotation.ResponseBody;

@Controller

public class MainController{

    @ResponseBody

    @RequestMapping("/GetEndPoints")

    public String GetAllPoint(HttpServletRequest request){

        String path = request.getContextPath();

        String host = request.getServerName();

        String endPointPath = "/actuator";

        StringBuilder sb = new StringBuilder();

        sb.append("<h2>Sprig Boot Actuator</h2>");

        sb.append("<ul>");

        String url = "http://" + host + ":8090" + path + endPointPath;

        sb.append("<li><a href='" + url + "'>" + url + "</a></li>");

        sb.append("</ul>");

        return sb.toString();

    }

}

// 访问 http://localhost:8888/GetEndPoints

常用的一些内置endpoint

actuator/health         查看程序健康信息

actuator/metrics        查看监视标准

actuator/beans          列出程序中的Spring BEAN 

actuator/env            列出程序运行所有信息

定义actuator/info特殊endpoint

actuator/info可以自定义一些信息

书写如下代码即可访问

package com.springlearn.learn.selfactuator;

import java.util.HashMap;

import java.util.Map;

import org.springframework.boot.actuate.info.Info;

import org.springframework.boot.actuate.info.InfoContributor;

import org.springframework.stereotype.Component;

@Component

public class BuildInfoActuator implements InfoContributor{

    @Override

    public void contribute(Info.Builder builder) {

        Map<String,String> data= new HashMap<String,String>();

        data.put("build.version", "1.0.0");

        builder.withDetail("buildInfo", data);

    }

}

actuator/shutdown需要post请求才能访问

可以用来关闭程序

定义如下控制器即可

package com.springlearn.learn.Controller;

import org.springframework.http.HttpEntity;

import org.springframework.http.HttpHeaders;

import org.springframework.http.MediaType;

import org.springframework.stereotype.Controller;

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

import org.springframework.web.bind.annotation.ResponseBody;

import org.springframework.web.client.RestTemplate;

@Controller

public class ShutDownController {

    @ResponseBody

    @RequestMapping(path = "/shutdown")

    public String actuatorShutdown(){

        String url = "http://localhost:8090/actuator/shutdown";

        HttpHeaders headers = new HttpHeaders();

        headers.add("Accept", MediaType.APPLICATION_JSON_VALUE);

        headers.setContentType(MediaType.APPLICATION_JSON);

        RestTemplate restTemplate = new RestTemplate();

        HttpEntity<String> requestBody = new HttpEntity<>("", headers);

        String e = restTemplate.postForObject(url, requestBody, String.class);

        return "Result: " + e;

    }

}

巴特西

springboot成神之——监视器

Spring Boot 的监视器

依赖

配置

书写监视控制器

常用的一些内置endpoint

定义actuator/info特殊endpoint

actuator/shutdown需要post请求才能访问

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