如何通过Redis和Kotlin实现事件驱动的应用程序

import io.lettuce.core.RedisClient
import io.lettuce.core.RedisURI
import io.lettuce.core.pubsub.RedisPubSubListener
import io.lettuce.core.pubsub.StatefulRedisPubSubConnection
import io.lettuce.core.pubsub.api.async.RedisPubSubAsyncCommands
import kotlinx.coroutines.*
import java.time.Duration

fun main() {
    // 创建Redis连接
    val redisURI = RedisURI.builder()
        .withHost("localhost")
        .withPort(6379)
        .withTimeout(Duration.ofSeconds(5))
        .build()
    val redisClient = RedisClient.create(redisURI)
    val connection = redisClient.connectPubSub()

    // 创建协程作用域
    runBlocking {
        // 消费者协程
        launch {
            val listener = object : RedisPubSubListener<String, String> {
                override fun message(channel: String?, message: String?) {
                    println("接收到消息：$message")
                    // TODO: 处理消息的业务逻辑
                }
            }

            val asyncCommands: RedisPubSubAsyncCommands<String, String> = connection.async()
            asyncCommands.subscribe("event:topic").await()
            asyncCommands.addListener(listener)

            // 监听消息
            while (isActive) {
                delay(1000)
            }

            // 取消订阅和关闭连接
            asyncCommands.unsubscribe("event:topic").await()
            asyncCommands.removeListener(listener)
            connection.close()
            redisClient.shutdown()
        }

        // 生产者协程
        launch {
            val asyncCommands: RedisPubSubAsyncCommands<String, String> = connection.async()
            var count = 0
            while (isActive) {
                count++
                val message = "事件消息$count"
                asyncCommands.publish("event:topic", message)
                delay(1000)
            }
        }
    }
}