RabbitMQ使用(一)

快速了解RabbitMQ使用，避免大家在重复的项目进行反复学习，可以灵活自用。

简单测试

采用RabbitListener注解声明队列、交换机、绑定关系

@Configuration
public class RabbitConfigure {

    public  final static String SPRING_BOOT_QUEUE="spring-boot-queue";

    public  final static String SPRING_BOOT_EXCHANGE="spring-boot-exchange";

    public  final static String SPRING_BOOT_BINDKEY="spring-boot-bindkey";
}


@Component
public class SendMsg {
    @Autowired
    private AmqpAdmin amqpAdmin;

    @Autowired
    private AmqpTemplate amqpTemplate;

    public void send(String msgContent){
        amqpTemplate.convertAndSend(RabbitConfigure.SPRING_BOOT_EXCHANGE,RabbitConfigure.SPRING_BOOT_BINDKEY,msgContent);
    }
}

@Component
public class RecevieMsgs {

    @RabbitListener(containerFactory = "rabbitListenerContainerFactory",
            bindings = @QueueBinding(
                    value = @Queue(value = RabbitConfigure.SPRING_BOOT_EXCHANGE+"3",durable = "true"),
                    exchange = @Exchange(value = RabbitConfigure.SPRING_BOOT_EXCHANGE,type = ExchangeTypes.TOPIC),
                    key =RabbitConfigure.SPRING_BOOT_BINDKEY)
    )
    public void receive(String content){
        System.out.println("receive msg:" + content);
    }
}

简单说明一下，这几个参数的意思

参数名说明
name 定义队列的名称
durable 是否持久化，重启rabbitmq队列是否还存在，默认为true
exclusive 是否排他，是否仅保持一个连接，且该连接断线后，此队列会被删除，默认为false
autoDelete 是否自动删除，当队列没有消息一段时间后自动删除，默认为false
arguments 参数，可以设置队列的最大消息数等

采用bean申明对象，将交换机、队列、绑定关系直接放在configure，更加方便

@RestController
@RequestMapping("/test")
public class RabbitTest {
    @Autowired
    private RecevieMsgs recevieMsgs;
    @Autowired
    private SendMsg sendMsg;

    @GetMapping("/sendMsg")
    public String sendMsg(@RequestParam String content){
        sendMsg.send(content);
        return "发送成功";
    }
}

@Configuration
public class RabbitConfigure2 {

    public  final static String SPRING_BOOT_QUEUE="spring-boot-queue-2";

    public  final static String SPRING_BOOT_EXCHANGE="spring-boot-exchange-2";

    public  final static String SPRING_BOOT_BINDKEY="spring-boot-bindkey-2";

    @Bean
    Queue queue(){
        return new Queue(SPRING_BOOT_QUEUE,false);
    }
    @Bean
    TopicExchange exchange(){
        return new TopicExchange(SPRING_BOOT_EXCHANGE);
    }

    @Bean
    Binding binding(Queue queue, TopicExchange exchange){
        return BindingBuilder.bind(queue).to(exchange).with(SPRING_BOOT_BINDKEY);
    }
}

@Component
public class SendMsg {
    @Autowired
    private AmqpAdmin amqpAdmin;

    @Autowired
    private AmqpTemplate amqpTemplate;

    public void send(String msgContent){
        amqpTemplate.convertAndSend(RabbitConfigure2.SPRING_BOOT_EXCHANGE,RabbitConfigure2.SPRING_BOOT_BINDKEY,msgContent);
    }
}

@Component
public class RecevieMsgs2 {

    @RabbitListener(queues = RabbitConfigure2.SPRING_BOOT_QUEUE)
    public void receive(String content){
        System.out.println("receive msg2:" + content);
    }
}

测试保持不变

MessageConverter发送对象

我们无论发送和接受消息，消息内容都可以使用Sring，这里我们可以设置MessageConverter设置发送和接受的内容参数是对象。

public class MsgContent1 {
    private String name;
    private String age;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getAge() {
        return age;
    }

    public void setAge(String age) {
        this.age = age;
    }

    @Override
    public String toString() {
        return "MsgContent1{" +
                "name='" + name + '\'' +
                ", age='" + age + '\'' +
                '}';
    }
    }

public class MsgContent2 {
    private String id;
    private String content;

    public String getId() {
        return id;
    }

    public void setId(String id) {
        this.id = id;
    }

    public String getContent() {
        return content;
    }

    public void setContent(String content) {
        this.content = content;
    }

    @Override
    public String toString() {
        return "MsgContent2{" +
                "id='" + id + '\'' +
                ", content='" + content + '\'' +
                '}';
    }
}

@Component
public class SendMsg2 {
    @Autowired
    private AmqpAdmin amqpAdmin;

    @Autowired
    private AmqpTemplate amqpTemplate;

    public void send(MsgContent1 msgContent){
        amqpTemplate.convertAndSend(RabbitMsgConvertConfigure.SPRING_BOOT_EXCHANGE,RabbitMsgConvertConfigure.SPRING_BOOT_BINDKEY,msgContent);
    }
    public void send(MsgContent2 msgContent){
        amqpTemplate.convertAndSend(RabbitMsgConvertConfigure.SPRING_BOOT_EXCHANGE,RabbitMsgConvertConfigure.SPRING_BOOT_BINDKEY,msgContent);
    }

}

@Component
//@RabbitListener除了可以作用在方法，也可以作用在类上。后者，需要再处理的方法上使用@RabbitHandler
@RabbitListener(queues = RabbitMsgConvertConfigure.SPRING_BOOT_QUEUE)
public class RecevieMsgs3 {

    @RabbitHandler
    public void receive(MsgContent1 content){
        System.out.println("[receive1] receiveMsgContent msg3:" + content);
    }
    @RabbitHandler
    public void receive2(MsgContent2 content){
        System.out.println("[receive2] receiveMsgContent msg3:" + content);
    }
}

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