Artemis

Spring Boot集成Artemis

什么是Artemis？

Artemis是神啊

Artemis是一个JMS产品。

准备工作

下载并安装ARTEMIS，在项目根目录创建存储数据的目录文件，并启动Artemis服务器。

添加Maven依赖项

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-artemis</artifactId>
</dependency>

配置

spring:
  artemis:
    # 指定连接外部Artemis服务器，而不是启动嵌入式服务:
    mode: native
    # 服务器地址和端口号:
    host: 127.0.0.1
    port: 61616
    # 连接用户名和口令由创建Artemis服务器时指定:
    user: ???
    password: ????

利用Artemis发送注册成功的邮件

Producer

package eternal.fire.service;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jms.core.JmsTemplate;
import org.springframework.stereotype.Component;

@Component
public class MessagingService {
    JmsTemplate jmsTemplate;
    MailService mailService;

    @Autowired
    public MessagingService(JmsTemplate jmsTemplate, MailService mailService) {
        this.jmsTemplate = jmsTemplate;
        this.mailService = mailService;
    }

    public void sendMailRegisterMessage(String email) {
        jmsTemplate.send("jms/queue/mail",session -> session.createTextMessage(email));
    }
}

Consumer

package eternal.fire.service;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jms.annotation.JmsListener;
import org.springframework.stereotype.Component;

import javax.mail.MessagingException;

@Component
public class MailMessageListener {
    MailService mailService;

    @Autowired
    public MailMessageListener(MailService mailService) {
        this.mailService = mailService;
    }

    @JmsListener(destination = "jms/queue/mail", concurrency = "10")
    public void onMessageReceived(String email) throws MessagingException {
        mailService.sendRegisterMail(email);
    }
}

MailService

关于MailService可以参考我上一篇文章：

package eternal.fire.service;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.mail.MailMessage;
import org.springframework.mail.javamail.JavaMailSender;
import org.springframework.mail.javamail.MimeMailMessage;
import org.springframework.mail.javamail.MimeMessageHelper;
import org.springframework.stereotype.Component;

import javax.mail.MessagingException;
import javax.mail.internet.MimeMessage;

@Component
public class MailService {
    JavaMailSender javaMailSender;

    @Autowired
    public MailService(JavaMailSender javaMailSender) {
        this.javaMailSender = javaMailSender;
    }

    public void sendRegisterMail(String email) throws MessagingException {
        MimeMessage mimeMessage = javaMailSender.createMimeMessage();
        MimeMessageHelper mimeMessageHelper = new MimeMessageHelper(mimeMessage);
        mimeMessageHelper.setFrom("674602921@qq.com");
        mimeMessageHelper.setTo(email);
        mimeMessageHelper.setSubject("Register successfully");
        mimeMessageHelper.setText("Congratulations! You have registered successfully");
        javaMailSender.send(mimeMessage);
    }
}

UserService逻辑

public User register(String email, String password, String name) {
    log.info("try to register by {}", email);
    User user = new User(email, password, name, System.currentTimeMillis());
    KeyHolder keyHolder = new GeneratedKeyHolder();
    try {
        jdbcTemplate.update(connection -> {
            var ps = connection.prepareStatement("INSERT INTO users(email,password,name,createdAt) VALUES (?,?,?,?)", Statement.RETURN_GENERATED_KEYS);
            ps.setObject(1, user.getEmail());
            ps.setObject(2, user.getPassword());
            ps.setObject(3, user.getName());
            ps.setObject(4, user.getCreatedAt());
            return ps;
        }, keyHolder);
    } catch (DataAccessException e) {
        throw new RuntimeException("Register failed");
    }
    messagingService.sendMailRegisterMessage(user.getEmail());
    user.setId(Objects.requireNonNull(keyHolder.getKey()).longValue());
    return user;

总结

阿尔忒弥斯（希腊语：Ἄρτεμις、英语：Artemis），又名辛西亚，是古希腊神话中的狩猎女神和接生之神，同时也是野兽的女主人与荒野的女领主，奥林匹斯十二主神之一。还是宙斯和勒托之女，是阿波罗的孪生姐姐。 [1]

阿尔忒弥斯自由独立，热爱野外生活，反对男女婚姻。她喜欢的是不嫁的处女们，以及那些蔑视阿佛洛狄忒的青年，她与赫斯提亚、雅典娜被视为奥林匹斯山上的三处女神。

她从小就向父亲宙斯许诺做永远的处女，同时索要弓箭、所有的山脉和20个给她保养猎靴的宁芙侍女。在林莽和山野间，阿尔忒弥斯手持弓箭，由猎狗伴随，与侍奉她的众仙女以狩猎为乐。她很喜欢金角鹿，并抓到这种鹿给她拉车。 [2]

阿尔忒弥斯因被命运女神选为接生神，于是便向宙斯索取主管接生新生儿的权力。她是古希腊人祭祀最多的神祇之一。世界七大奇迹之一的阿尔忒弥斯神庙就是专门为她修建的。

参考

https://www.liaoxuefeng.com/wiki/1252599548343744/1282388602650658