Scala 如何使用Kafka、Alpakka Kafka、Play Framework和Websocket处理POST请求？
假设我有两个卡夫卡主题，Scala 如何使用Kafka、Alpakka Kafka、Play Framework和Websocket处理POST请求？,scala,websocket,apache-kafka,playframework,alpakka,Scala,Websocket,Apache Kafka,Playframework,Alpakka,假设我有两个卡夫卡主题，request\u topic用于我的帖子请求，而response\u topic用于我的回复 以下是模型： case class Request(requestId: String, body: String) case class Response(responseId: String, body: String, requestId: String) 这是我的套接字处理程序 def socket = WebSocket.accept[String, String]
request\u topicresponse\u topiccase class Request(requestId: String, body: String)
case class Response(responseId: String, body: String, requestId: String)
def socket = WebSocket.accept[String, String] { req =>
val requestId = ??? // Generate a unique requestId
val in: Sink[String, Future[Done]] = Sink.foreach[String]{ msg =>
val record = new ProducerRecord[String, Request]("request_topic", "key", Request(requestId, msg))
val producer: KafkaProducer[String, Request] = ???
Future { producer.send(record).get }
}
// Once produced, some stream processing apps will manage to process request and publish the reponse to response_topic
// The Request and Response object are linked by the requestId field.
val consumerSettings = ???
val out: Source[ConsumerRecord[String, Response], _] = Consumer
.plainSource(consumerSettings, Subscriptions.topics("response_topic"))
.filter(cr => cr.value.requestId == requestId)
.map(cr => someResponseString(cr.value))
Flow.formSinkAndSource(in, out)
}
def someResponseString(res: Response): String = ???
in:SinkKafkaProducer