spring-boot redis stream消息队列demo-及死信简单处理

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Bean;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.data.redis.stream.StreamListener;
import org.springframework.data.redis.stream.Subscription;
import org.springframework.data.redis.stream.config.StreamListenerContainerFactory;
import org.springframework.data.redis.stream.listener.RedisMessageListenerContainer;
 
@SpringBootApplication
public class RedisStreamDemoApplication {
 
    public static void main(String[] args) {
        SpringApplication.run(RedisStreamDemoApplication.class, args);
    }
 
    @Bean
    public StreamListener<String, String> processListener(StringRedisTemplate template) {
        return new StreamListener<String, String>() {
            @Override
            public void onData(String message) {
                System.out.println("Received: " + message);
                // 处理业务逻辑
                // ...
                // 如果需要将消息放入死信队列
                template.opsForStream().add("dead_letter_stream", "dead_letter", message);
            }
 
            @Override
            public void onError(Throwable throwable) {
                System.err.println("Error: " + throwable.getMessage());
            }
        };
    }
 
    @Bean
    public RedisMessageListenerContainer redisContainer(RedisConnectionFactory connectionFactory,
                                                       StreamListenerContainerFactory<String, String> factory) {
        RedisMessageListenerContainer container = new RedisMessageListenerContainer();
        container.setConnectionFactory(connectionFactory);
        container.addMessageListener(processListener(new StringRedisTemplate()), "my_stream");
        return container;
    }
}

这个代码示例展示了如何在Spring Boot应用中使用StringRedisTemplate来监听名为"my\_stream"的Redis流消息，并在接收到消息后执行业务逻辑。如果业务逻辑处理失败，将打印错误信息。如果业务逻辑处理成功，可以选择将消息发送到死信队列"dead\_letter\_stream"中。这个示例简单明了，并且清晰地展示了如何在Spring应用中集成Redis Streams。