1.combinations-elk-starter

1.目录结构

2.log4j2-spring.xml 从环境变量读取host和port

    <!-- logstash 的 SocketAppender 配置 -->
    <Property name="socket.host">${sys:socket.host}</Property>
    <Property name="socket.port">${sys:socket.port}</Property>

3.ELKProperties.java 两个属性

package com.sunxiansheng.elk.config.properties;

import lombok.Data;
import org.springframework.boot.context.properties.ConfigurationProperties;

/**
 * Description: ELK 属性
 *
 * @Author sun
 * @Create 2025/1/10 22:32
 * @Version 1.0
 */
@ConfigurationProperties(prefix = "sun-rays.elk.logstash")
@Data
public class ELKProperties {

    /**
     * LogStash的主机
     */
    private String host;

    /**
     * LogStash的端口
     */
    private Integer port;
}

4.ELKAutoConfiguration.java 启用配置类

package com.sunxiansheng.elk.config;

import com.sunxiansheng.elk.config.properties.ELKProperties;
import lombok.extern.slf4j.Slf4j;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.context.annotation.Configuration;

import javax.annotation.PostConstruct;

/**
 * Description: ELK自动配置类
 *
 * @Author sun
 * @Create 2024/12/31 13:14
 * @Version 1.0
 */
@Configuration
@EnableConfigurationProperties({ELKProperties.class}) // 启用配置类
@Slf4j
public class ELKAutoConfiguration {

    /**
     * 自动配置成功日志
     */
    @PostConstruct
    public void logConfigSuccess() {
        log.info("ELKAutoConfiguration has been loaded successfully!");
    }
}

5.ELKEnvironmentPreparedListener.java 监听器从application.yml中获取属性值

package com.sunxiansheng.elk.listener;

import org.springframework.boot.context.event.ApplicationEnvironmentPreparedEvent;
import org.springframework.boot.context.logging.LoggingApplicationListener;
import org.springframework.context.ApplicationListener;
import org.springframework.core.Ordered;
import org.springframework.core.env.ConfigurableEnvironment;

/**
 * Description: 配置文件已加载，Environment 对象已初始化
 * 使用 ApplicationEnvironmentPreparedEvent 读取 application.yml 文件中的 sun-rays.elk.logstash.host 和 sun-rays.elk.logstash.port 配置
 *
 * @Author sun
 * @Create 2025/1/10 22:46
 * @Version 1.0
 */
public class ELKEnvironmentPreparedListener implements ApplicationListener<ApplicationEnvironmentPreparedEvent>, Ordered {

    @Override
    public void onApplicationEvent(ApplicationEnvironmentPreparedEvent event) {
        ConfigurableEnvironment environment = event.getEnvironment();

        // 获取 socket.host 属性并提供默认值
        String socketHost = environment.getProperty("sun-rays.elk.logstash.host", "127.0.0.1");
        if ("127.0.0.1".equals(socketHost)) {
            System.err.println("WARNING: sun-rays.elk.logstash.host 属性未设置，使用默认值: " + socketHost);
        }

        // 获取 socket.port 属性并提供默认值
        String socketPort = environment.getProperty("sun-rays.elk.logstash.port", "8080");
        if ("8080".equals(socketPort)) {
            System.err.println("WARNING: sun-rays.elk.logstash.port 属性未设置，使用默认值: " + socketPort);
        }

        // 将属性设置为系统属性
        System.setProperty("socket.host", socketHost);
        System.setProperty("socket.port", socketPort);
    }

    /**
     * 当前监听器的启动顺序需要在日志配置监听器的前面，保证在日志文件初始化之前读取 application.yml 的配置。
     *
     * @return
     */
    @Override
    public int getOrder() {
        return LoggingApplicationListener.DEFAULT_ORDER - 1;
    }
}

6.spring.factories 注册监听器

org.springframework.boot.autoconfigure.EnableAutoConfiguration=\
com.sunxiansheng.elk.config.ELKAutoConfiguration
org.springframework.context.ApplicationListener=\
com.sunxiansheng.elk.listener.ELKEnvironmentPreparedListener

2.combinations-elk-starter-demo

1.目录结构

2.application.yml 配置elk属性

sun-rays:
  log4j2:
    home: /Users/sunxiansheng/IdeaProjects/sunrays-framework/sunrays-combinations-demo/combinations-elk-starter-demo/logs # 日志根目录(默认./logs)
    module: sunrays-combinations-demo/combinations-elk-starter-demo # 模块根目录从仓库根目录开始(默认defaultModule)
  env:
    path: /Users/sunxiansheng/IdeaProjects/sunrays-framework/sunrays-combinations-demo/combinations-elk-starter-demo # .env文件的绝对路径
  elk:
    logstash:
      host: ${ELK_LOGSTASH_HOST} # LogStash的主机
      port: ${ELK_LOGSTASH_PORT} # LogStash的端口

3…env文件配置属性值

ELK_LOGSTASH_HOST=host
ELK_LOGSTASH_PORT=port