RabbitMQ安装rabbitmq-delayed-message-exchange插件实现延迟队列

https://github.com/rabbitmq/rabbitmq-delayed-message-exchange/releases

rabbitmq-plugins enable rabbitmq_delayed_message_exchange

管理端新增交换机时可以看到这个类型说明启用成功

import com.great.common.core.constant.RabbitConstant;
import org.springframework.amqp.core.Binding;
import org.springframework.amqp.core.BindingBuilder;
import org.springframework.amqp.core.CustomExchange;
import org.springframework.amqp.core.Queue;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

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


@Configuration
public class GrabDelayedConfig {

    @Bean
    public Queue grabQueue() {
        return new Queue(RabbitConstant.QUEUE_DELAYED_DISPATCH_GRAB);
    }

    @Bean
    public CustomExchange delayedExchange() {
        Map args = new HashMap<>(1);
        args.put("x-delayed-type", "direct");
        return new CustomExchange(RabbitConstant.EXCHANGE_DELAYED, "x-delayed-message", true, false, args);
    }

    @Bean
    public Binding bindingNotify(@Qualifier("grabQueue") Queue queue,
                                 @Qualifier("delayedExchange") CustomExchange customExchange) {
        return BindingBuilder.bind(queue).to(customExchange).with(RabbitConstant.ROUTING_KEY_DISPATCH_GRAB).noargs();
    }
}

 
    public void sendDelayMessage(Object message, Integer delayTime) {
        rabbitTemplate.convertAndSend(RabbitConstant.EXCHANGE_DELAYED, RabbitConstant.ROUTING_KEY_DISPATCH_GRAB, message, a -> {
            a.getMessageProperties().setDelay(delayTime);
            return a;
        });
    }

@RabbitListener(queuesToDeclare = @Queue(value = RabbitConstant.QUEUE_DELAYED_DISPATCH_GRAB))
    public void receivedDispatchGrabMessage(String message) {
        System.out.println("延迟消费：" + message);
    }