如何使用Akka Streams不断消耗来自Apache Pulsar的消息并打印每条消息?
下面是我从pulsar4s库中找到的示例代码。而不是将消息发布到另一个主题,如何打印消耗的消息?
val consumerFn = () => client.consumer(ConsumerConfig(Seq(intopic), Subscription("mysub")))
val producerFn = () => client.producer(ProducerConfig(outtopic))
val control = source(consumerFn, Some(MessageId.earliest))
.map { consumerMessage => ProducerMessage(consumerMessage.data) }
.to(sink(producerFn)).run()
您可以简单地使用Sink.foreach(println))
例如
source(consumerFn, Some(MessageId.earliest)).
.runWith(Sink.foreach(println))