基础知识

1. 虚拟主机 (Virtual Host): 每个 virtual host 拥有自己的 exchanges, queues 等 (类似 MySQL 中的库)
2. 交换器 (Exchange): 生产者产生的消息并不是直接发送给 queue 的，而是要经过 exchange 路由, exchange 类型如下：
   1. fanout: 把所有发送到该 exchange 的消息路由到所有与它绑定的 queue 中
   2. direct: 把消息路由到 binding key 与routing key 完全匹配的 queue 中
   3. topic: 模糊匹配 (单词间使用”.”分割，”*” 匹配一个单词，”#” 匹配零个或多个单词)
   4. headers: 根据发送的消息内容中的 headers 属性进行匹配
3. 信道 (Channel): 建立在真实的 TCP 连接之上的虚拟连接, RabbitMQ 处理的每条 AMQP 指令都是通过 channel 完成的

使用示例

RabbitMQ 安装参考： docker 安装rabbitMQ

新建 Spring Boot 项目，添加配置：

spring:

  rabbitmq:

    host: 192.168.30.101

    port: 5672

    username: admin

    password: admin

    virtual-host: my_vhost

logging:

  level:

    com: INFO

1. 基本使用

Queue

@Configuration

public class RabbitmqConfig {

    @Bean

    public Queue hello() {

        return new Queue("hello");

    }

}

Producer

@Component

@EnableAsync

public class SenderTask {

    private static final Logger logger = LoggerFactory.getLogger(SenderTask.class);

    @Autowired

    private RabbitTemplate rabbitTemplate;

    @Autowired

    private Queue queue;

    @Async

    @Scheduled(cron = "0/1 * * * * ? ")

    public void send(){

        String message = LocalDateTime.now().format(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"));

        rabbitTemplate.convertAndSend(queue.getName(), message);

        logger.info(" [x] Sent '" + message + "'");

    }

}

Consumer

@Component

@RabbitListener(queues = "hello")

public class ReceiverTask {

    private static final Logger logger = LoggerFactory.getLogger(ReceiverTask.class);

    @RabbitHandler

    public void receive(String in){

        logger.info(" [x] Received '" + in + "'");

    }

}

2. fanout

Exchange, Queue, Binding

@Configuration

public class RabbitmqConfig {

    @Bean

    public FanoutExchange fanout() {

        return new FanoutExchange("fanoutExchangeTest");

    }

    @Bean

    public Queue autoDeleteQueue1() {

        return new AnonymousQueue();// 创建一个非持久的，独占的自动删除队列

    }

    @Bean

    public Queue autoDeleteQueue2() {

        return new AnonymousQueue();

    }

    @Bean

    public Binding binding1(FanoutExchange fanout,

                            Queue autoDeleteQueue1) {

        return BindingBuilder.bind(autoDeleteQueue1).to(fanout);

    }

    @Bean

    public Binding binding2(FanoutExchange fanout,

                            Queue autoDeleteQueue2) {

        return BindingBuilder.bind(autoDeleteQueue2).to(fanout);

    }

}

Producer

@Component

@EnableAsync

public class SenderTask {

    private static final Logger logger = LoggerFactory.getLogger(SenderTask.class);

    @Autowired

    private RabbitTemplate rabbitTemplate;

    @Autowired

    private FanoutExchange fanoutExchange;

    @Async

    @Scheduled(cron = "0/1 * * * * ? ")

    public void send(){

        String message = LocalDateTime.now().format(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"));

        rabbitTemplate.convertAndSend(fanoutExchange.getName(), "", message);

        logger.info(" [x] Sent '" + message + "'");

    }

}

Consumer

@Component

public class ReceiverTask {

    private static final Logger logger = LoggerFactory.getLogger(ReceiverTask.class);

    @RabbitListener(queues = "#{autoDeleteQueue1.name}")

    public void receive1(String in){

        receive(in, 1);

    }

    @RabbitListener(queues = "#{autoDeleteQueue2.name}")

    public void receive2(String in){

        receive(in, 2);

    }

    public void receive(String in, int receiver){

        logger.info("instance " + receiver + " [x] Received '" + in + "'");

    }

}

3. direct

Exchange, Queue, Binding

@Configuration

public class RabbitmqConfig {

    @Bean

    public DirectExchange direct() {

        return new DirectExchange("directExchangeTest");

    }

    @Bean

    public Queue autoDeleteQueue1() {

        return new AnonymousQueue();// 创建一个非持久的，独占的自动删除队列

    }

    @Bean

    public Queue autoDeleteQueue2() {

        return new AnonymousQueue();

    }

    @Bean

    public Binding binding1a(DirectExchange direct,

                            Queue autoDeleteQueue1) {

        return BindingBuilder.bind(autoDeleteQueue1).to(direct).with("orange");

    }

    @Bean

    public Binding binding1b(DirectExchange direct,

                             Queue autoDeleteQueue1) {

        return BindingBuilder.bind(autoDeleteQueue1).to(direct).with("green");

    }

    @Bean

    public Binding binding2a(DirectExchange direct,

                             Queue autoDeleteQueue2) {

        return BindingBuilder.bind(autoDeleteQueue2).to(direct).with("green");

    }

    @Bean

    public Binding binding2b(DirectExchange direct,

                             Queue autoDeleteQueue2) {

        return BindingBuilder.bind(autoDeleteQueue2).to(direct).with("black");

    }

}

Producer

@Component

@EnableAsync

public class SenderTask {

    private static final Logger logger = LoggerFactory.getLogger(SenderTask.class);

    @Autowired

    private RabbitTemplate rabbitTemplate;

    @Autowired

    private DirectExchange directExchange;

    private final String[] keys = {"orange", "black", "green"};

    @Async

    @Scheduled(cron = "0/1 * * * * ? ")

    public void send(){

        Random random = new Random();

        String key = keys[random.nextInt(keys.length)];

        String message = LocalDateTime.now().format(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"))

                + " to: " + key;

        rabbitTemplate.convertAndSend(directExchange.getName(), key, message);

        logger.info(" [x] Sent '" + message + "'");

    }

}

Consumer

@Component

public class ReceiverTask {

    private static final Logger logger = LoggerFactory.getLogger(ReceiverTask.class);

    @RabbitListener(queues = "#{autoDeleteQueue1.name}")

    public void receive1(String in){

        receive(in, 1);

    }

    @RabbitListener(queues = "#{autoDeleteQueue2.name}")

    public void receive2(String in){

        receive(in, 2);

    }

    public void receive(String in, int receiver){

        logger.info("instance " + receiver + " [x] Received '" + in + "'");

    }

}

4. topic

Exchange, Queue, Binding

@Configuration

public class RabbitmqConfig {

    @Bean

    public TopicExchange topic() {

        return new TopicExchange("topicExchangeTest");

    }

    @Bean

    public Queue autoDeleteQueue1() {

        return new AnonymousQueue();// 创建一个非持久的，独占的自动删除队列

    }

    @Bean

    public Queue autoDeleteQueue2() {

        return new AnonymousQueue();

    }

    @Bean

    public Binding binding1a(TopicExchange topic,

                            Queue autoDeleteQueue1) {

        return BindingBuilder.bind(autoDeleteQueue1).to(topic).with("*.orange.*");

    }

    @Bean

    public Binding binding1b(TopicExchange topic,

                             Queue autoDeleteQueue1) {

        return BindingBuilder.bind(autoDeleteQueue1).to(topic).with("*.*.rabbit");

    }

    @Bean

    public Binding binding2a(TopicExchange topic,

                             Queue autoDeleteQueue2) {

        return BindingBuilder.bind(autoDeleteQueue2).to(topic).with("lazy.#");

    }

}

Producer

@Component

@EnableAsync

public class SenderTask {

    private static final Logger logger = LoggerFactory.getLogger(SenderTask.class);

    @Autowired

    private RabbitTemplate rabbitTemplate;

    @Autowired

    private TopicExchange topicExchange;

    private final String[] keys = {"quick.orange.rabbit", "lazy.orange.elephant", "quick.orange.fox",

            "lazy.brown.fox", "lazy.pink.rabbit", "quick.brown.fox"};

    @Async

    @Scheduled(cron = "0/1 * * * * ? ")

    public void send(){

        Random random = new Random();

        String key = keys[random.nextInt(keys.length)];

        String message = LocalDateTime.now().format(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"))

                + " to: " + key;

        rabbitTemplate.convertAndSend(topicExchange.getName(), key, message);

        logger.info(" [x] Sent '" + message + "'");

    }

}

Consumer

@Component

public class ReceiverTask {

    private static final Logger logger = LoggerFactory.getLogger(ReceiverTask.class);

    @RabbitListener(queues = "#{autoDeleteQueue1.name}")

    public void receive1(String in){

        receive(in, 1);

    }

    @RabbitListener(queues = "#{autoDeleteQueue2.name}")

    public void receive2(String in){

        receive(in, 2);

    }

    public void receive(String in, int receiver){

        logger.info("instance " + receiver + " [x] Received '" + in + "'");

    }

}

完整代码：GitHub