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我已经编写了一个Akka应用程序,该应用程序从Kafka获取输入,然后使用分片演员处理数据并输出到Kafka。当发送给分片演员时,对ReactiveKafka的背压
但在某些场合分片区域不能处理负载,我也得到:
你或许应该实行流量控制,以避免水浸 远程连接。
如何在此链/流中实施背压?
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从代码一些片断:
ReactiveKafka kafka = new ReactiveKafka();
Subscriber subscriber = kafka.publish(pp, system);
ActorRef kafkaWriterActor = (ActorRef) Source.actorRef(10000, OverflowStrategy.dropHead())
.map(ix -> KeyValueProducerMessage.apply(Integer.toString(ix.hashCode()), ix))
.to(Sink.fromSubscriber(subscriber))
.run(materializer);
ConsumerProperties cp = new PropertiesBuilder.Consumer(brokerList, intopic, consumergroup, new ByteArrayDeserializer(), new NgMsgDecoder())
.build().consumerTimeoutMs(5000).commitInterval(Duration.create(60, TimeUnit.SECONDS)).readFromEndOfStream();
Publisher<ConsumerRecord<byte[], StreamEvent>> publisher = kafka.consume(cp,system);
ActorRef streamActor = ClusterSharding.get(system).start("StreamActor",
Props.create(StreamActor.class, synctime), ClusterShardingSettings.create(system), messageExtractor);
shardRegionTypenames.add("StreamActor");
Source.fromPublisher(publisher)
.runWith(Sink.foreach(msg -> {
streamActor.tell(msg.value(),ActorRef.noSender());
}), materializer);
我是Akka框架的新手。但是您可以尝试使用Akka Streams来照顾背压技术。 – Advika