RabbitMQUtils

自动创建消息队列和队列绑定关系

import com.lubansoft.center.process.task.api.constant.ProcessMQKeys;
import com.lubansoft.center.process.task.api.model.mq.ProcessMQMessage;
import org.springframework.amqp.core.AmqpAdmin;
import org.springframework.amqp.core.Binding;
import org.springframework.amqp.core.Queue;
import org.springframework.amqp.core.TopicExchange;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import java.util.HashMap;

/**
 * @Description : rabbit配置
 * @Author : cxw
 * @Date : 2022/11/15 13:39
 * @Version : 1.0
 **/
@Configuration
public class RabbitMQUtils {

    private HashMap<String,Queue> queueHashMap=new HashMap<>();

    @Autowired
    private AmqpAdmin amqpAdmin;

    @Autowired
    private RabbitTemplate rabbitTemplate;

    @Bean(name = "process_exchange" )
    public TopicExchange topicExchange() {
        return new TopicExchange(ProcessMQKeys.EXCHANGE);
    }

    /**
     * 注册RabbitMq的组件信息
     *
     * @param queue    队列对象
     * @param binding  队列与交换机绑定关系对象
     */
    private void registerModule(Queue queue, Binding binding) {
        amqpAdmin.declareQueue(queue);
        amqpAdmin.declareExchange(topicExchange());
        amqpAdmin.declareBinding(binding);
    }

    /**
     * 推送消息至businessType对应的queue
     * @param businessType
     * @param msg
     */
    public void pushTaskCenterMsg(String businessType, ProcessMQMessage msg){
        String queueName=ProcessMQKeys.QUEUES_PREFIX+businessType;
        String routingKey=ProcessMQKeys.KEY_PREFIX+businessType;
        if(!queueHashMap.containsKey(queueName)){
            //获取队列
            Queue queue = getQueue(queueName);
            //绑定关系
            Binding binding = new Binding(queue.getName(), Binding.DestinationType.QUEUE,ProcessMQKeys.EXCHANGE, routingKey, null);
            registerModule(queue,binding);
        }
        rabbitTemplate.convertAndSend(ProcessMQKeys.EXCHANGE,routingKey,msg);
    }

    private Queue getQueue(String queueName) {
        if(queueHashMap.containsKey(queueName)){
            return queueHashMap.get(queueName);
        }else {
            Queue queue = new Queue(queueName, true);
            queueHashMap.put(queueName,queue);
            return queue;
        }
    }
}