架构师成长之路|Redis实现延迟队列的三种方式

延迟队列实现

基于监听key过期实现的延迟队列实现，这里需要继承KeyspaceEventMessageListener类来实现监听redis键过期

public class KeyExpirationEventMessageListener extends KeyspaceEventMessageListener implementsApplicationEventPublisherAware {private static final Topic KEYEVENT_EXPIRED_TOPIC = new PatternTopic("__keyevent@*__:expired");private @Nullable ApplicationEventPublisher publisher;/*** Creates new {@link MessageListener} for {@code __keyevent@*__:expired} messages.** @param listenerContainer must not be {@literal null}.*/public KeyExpirationEventMessageListener(RedisMessageListenerContainer listenerContainer) {super(listenerContainer);}/** (non-Javadoc)* @see org.springframework.data.redis.listener.KeyspaceEventMessageListener#doRegister(org.springframework.data.redis.listener.RedisMessageListenerContainer)*/@Overrideprotected void doRegister(RedisMessageListenerContainer lis