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Merge pull request #29203 from ignasi35/example-for-throttle-op

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Ignasi Marimon-Clos 2020-06-10 17:29:40 +02:00 • committed by GitHub
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akka-docs/src/test/java/jdocs/stream/operators/sourceorflow/Throttle.java Normal file
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/*
* Copyright (C) 2020 Lightbend Inc. <https://www.lightbend.com>
*/
package jdocs.stream.operators.sourceorflow;
import akka.NotUsed;
import akka.actor.ActorSystem;
import akka.stream.Materializer;
import akka.stream.ThrottleMode;
import akka.stream.javadsl.Sink;
import akka.stream.javadsl.Source;
import java.time.Duration;
import java.util.stream.Stream;
import docs.stream.operators.sourceorflow.ThrottleCommon.Frame;
/** */
public class Throttle {
public static void main(String[] args) {
ActorSystem actorSystem = ActorSystem.create("25fps-throttled-stream");
Materializer mat = Materializer.matFromSystem(actorSystem);
Source<Frame, NotUsed> frameSource =
Source.fromIterator(() -> Stream.iterate(0, i -> i + 1).iterator())
.map(i -> new Frame(i.intValue()));
// #throttle
int framesPerSecond = 24;
Source<Frame, NotUsed> videoThrottling =
frameSource.throttle(framesPerSecond, Duration.ofSeconds(1));
// serialize `Frame` and send over the network.
// #throttle
// #throttle-with-burst
Source<Frame, NotUsed> throttlingWithBurst =
frameSource.throttle(
framesPerSecond, Duration.ofSeconds(1), framesPerSecond * 30, ThrottleMode.shaping());
// serialize `Frame` and send over the network.
// #throttle-with-burst
videoThrottling.map(f -> f.i()).to(Sink.foreach(System.out::println)).run(mat);
throttlingWithBurst.take(1000L).map(f -> f.i()).to(Sink.foreach(System.out::println)).run(mat);
}
}