五分鐘帶你玩轉rabbitmq（六）SimpleMessageListener

如果不想用通用的rabbitmq配置 那麼就可以使用SimpleMessageListener自定義消費者

在此隊列中 配置為此方法中的配置 而不是走rabbitmq的通用配置

import org.springframework.amqp.core.AcknowledgeMode;
import org.springframework.amqp.core.Message;
import org.springframework.amqp.rabbit.connection.ConnectionFactory;
import org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer;
import org.springframework.amqp.rabbit.listener.api.ChannelAwareMessageListener;
import org.springframework.amqp.support.ConsumerTagStrategy;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
 
import com.alibaba.fastjson.JSONObject;
import com.rabbitmq.client.Channel;
import org.springframework.context.annotation.Configuration;
 
 
@Configuration
public class SimpleMessageListener {
 
    @Autowired
    BusinessConfig businessConfig;
 
    @Bean
    public SimpleMessageListenerContainer messageContainer(ConnectionFactory connectionFactory) {
        SimpleMessageListenerContainer container = new SimpleMessageListenerContainer(connectionFactory);
        // 添加隊列 可以添加多個隊列
        //container.setQueues(businessConfig.Queue());
        container.setExposeListenerChannel(true);
        // 設定目前的消費者數量
        // container.setMaxConcurrentConsumers(5);
        container.setConcurrentConsumers(1);
        // 設定确認模式手工确認
        container.setAcknowledgeMode(AcknowledgeMode.MANUAL);
        container.setMessageListener(new ChannelAwareMessageListener() {
            @Override
            public void onMessage(Message message, Channel channel) throws Exception {
                byte[] body = message.getBody();
                System.out.println("1  receive msg : " + JSONObject.parseObject(new String(body)));
                // 不讀取消息并且将目前消息抛棄掉，消息隊列中删除目前消息
                // channel.basicReject(message.getMessageProperties().getDeliveryTag(), false);
                // 不讀取消息，消息隊列中保留目前消息未被檢視狀态
                // channel.basicReject(message.getMessageProperties().getDeliveryTag(), true);
                // 确認消息成功消費，删除消息隊列中的消息
                // channel.basicAck(message.getMessageProperties().getDeliveryTag(), false);
                // 确認消息成功消費，删除消息隊列中的消息，他跟上面貌似一樣
                channel.basicAck(message.getMessageProperties().getDeliveryTag(), true);
            }
        });
        return container;
    }
 
    @Bean
    public SimpleMessageListenerContainer messageContainer2(ConnectionFactory connectionFactory) {
        SimpleMessageListenerContainer container = new SimpleMessageListenerContainer(connectionFactory);
        // 監聽多個queue
        //container.setQueues(businessConfig.Queue());
        // 設定目前消費者數量
        container.setConcurrentConsumers(1);
        // 設定最大的消費者數量
        container.setMaxConcurrentConsumers(5);
        // 設定不要重回隊列
        container.setDefaultRequeueRejected(false);
        // 設定自動簽收
        container.setAcknowledgeMode(AcknowledgeMode.AUTO);
        // 設定消費端tag政策
        container.setConsumerTagStrategy(new ConsumerTagStrategy() {
            @Override
            public String createConsumerTag(String queue) {
                return queue + "_" + System.currentTimeMillis();
            }
        });
        // 設定監聽
        container.setMessageListener(new ChannelAwareMessageListener() {
            @Override
            public void onMessage(Message message, Channel channel) throws Exception {
                // 消息處理
                String msg = new String(message.getBody(), "UTF-8");
                System.out.println("---消費者---隊列名：" + message.getMessageProperties().getConsumerQueue() + "，消息：" + msg
                    + ",deliveryTag：" + message.getMessageProperties().getDeliveryTag());
                channel.basicAck(message.getMessageProperties().getDeliveryTag(), false);;
            }
        });
        return container;
    }
}