微服务：整合 Spring Boot Admin

一、前言

　　在工作中，其实很多人是不怎么关注邮件，经常是几个小时才看一次邮件。所以我们需要向用户发送即时的消息通知。又随着钉钉用的公司越来越多，于是将消息发送给钉钉也是个不错的选择！

二、代码演示

1、首先设置我们的钉钉聊天机器人：

 2、microservice-monitor-server -> DingDingMessageUtil.java

package com.microservice.minitor.notifier;

import com.alibaba.fastjson.JSONObject;

import java.io.InputStream;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;

public class DingDingMessageUtil {
    public static String access_token = "钉钉Token";
    public static void sendTextMessage(String msg) {
        try {
            Message message = new Message();
            message.setMsgtype("text");
            message.setText(new MessageInfo(msg));
            URL url = new URL("https://oapi.dingtalk.com/robot/send?access_token=" + access_token);
            // 建立 http 连接
            HttpURLConnection conn = (HttpURLConnection) url.openConnection();
            conn.setDoOutput(true);
            conn.setDoInput(true);
            conn.setUseCaches(false);
            conn.setRequestMethod("POST");
            conn.setRequestProperty("Charset", "UTF-8");
            conn.setRequestProperty("Content-Type", "application/Json; charset=UTF-8");
            conn.connect();
            OutputStream out = conn.getOutputStream();
            String textMessage = JSONObject.toJSONString(message);
            byte[] data = textMessage.getBytes();
            out.write(data);
            out.flush();
            out.close();
            InputStream in = conn.getInputStream();
            byte[] data1 = new byte[in.available()];
            in.read(data1);
            System.out.println(new String(data1));
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}
class Message {
    private String msgtype;
    private MessageInfo text;
    public String getMsgtype() {
        return msgtype;
    }
    public void setMsgtype(String msgtype) {
        this.msgtype = msgtype;
    }
    public MessageInfo getText() {
        return text;
    }
    public void setText(MessageInfo text) {
        this.text = text;
    }
}
class MessageInfo {
    private String content;
    public MessageInfo(String content) {
        this.content = content;
    }
    public String getContent() {
        return content;
    }
    public void setContent(String content) {
        this.content = content;
    }
}

 2、microservice-monitor-server -> DingDingNotifier.java

package com.microservice.minitor.notifier;

import java.util.HashMap;
import java.util.Map;

import com.alibaba.fastjson.JSONObject;
import org.springframework.context.expression.MapAccessor;
import org.springframework.expression.Expression;
import org.springframework.expression.ParserContext;
import org.springframework.expression.spel.standard.SpelExpressionParser;
import org.springframework.expression.spel.support.StandardEvaluationContext;
import org.springframework.http.HttpEntity;
import org.springframework.http.HttpHeaders;
import org.springframework.http.MediaType;
import org.springframework.web.client.RestTemplate;

import de.codecentric.boot.admin.server.domain.entities.Instance;
import de.codecentric.boot.admin.server.domain.entities.InstanceRepository;
import de.codecentric.boot.admin.server.domain.events.InstanceEvent;
import de.codecentric.boot.admin.server.notify.AbstractStatusChangeNotifier;
import reactor.core.publisher.Mono;


public class DingDingNotifier extends AbstractStatusChangeNotifier {

    public DingDingNotifier(InstanceRepository repository) {
        super(repository);
    }
    @Override
    protected Mono<Void> doNotify(InstanceEvent event, Instance instance) {
        String serviceName = instance.getRegistration().getName();
        String serviceUrl = instance.getRegistration().getServiceUrl();
        String status = instance.getStatusInfo().getStatus();
        Map<String, Object> details = instance.getStatusInfo().getDetails();
        StringBuilder str = new StringBuilder();
        str.append("监控报警 : 【" + serviceName + "】");
        str.append("【服务地址】" + serviceUrl);
        str.append("【状态】" + status);
        str.append("【详情】" + JSONObject.toJSONString(details));
        return Mono.fromRunnable(() -> {
            DingDingMessageUtil.sendTextMessage(str.toString());
        });
    }
}

 3、microservice-monitor-server -> MinitorServerApplication.java

package com.microservice.minitor;

import com.microservice.minitor.notifier.DingDingNotifier;
import de.codecentric.boot.admin.server.config.EnableAdminServer;
import de.codecentric.boot.admin.server.domain.entities.InstanceRepository;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Bean;

@SpringBootApplication
@EnableAdminServer
public class MinitorServerApplication {

    @Bean
    public DingDingNotifier dingDingNotifier(InstanceRepository repository) {
        return new DingDingNotifier(repository);
    }

    public static void main(String[] args) {
        SpringApplication.run(MinitorServerApplication.class, args);
    }
}

 三、运行测试

 启动项目：

 PC：

手机：