content: /*
   * Copyright (C) since 2016 Lightbend Inc. <https://www.lightbend.com>
   */
  
  package docs.javadsl;
  
  import akka.NotUsed;
  import akka.actor.ActorSystem;
  
  import akka.stream.ThrottleMode;
  import akka.stream.javadsl.Sink;
  import akka.stream.javadsl.Source;
  
  import java.time.Duration;
  import java.util.Optional;
  
  // #event-source
  import java.util.function.Function;
  import java.util.concurrent.CompletionStage;
  
  import akka.http.javadsl.Http;
  import akka.http.javadsl.model.*;
  import akka.http.javadsl.model.sse.ServerSentEvent;
  import akka.stream.alpakka.sse.javadsl.EventSource;
  // #event-source
  
  public class EventSourceTest {
  
    @SuppressWarnings("ConstantConditions")
    public static void compileTest() {
  
      String host = "localhost";
      int port = 8080;
      ActorSystem system = null;
  
      int nrOfSamples = 10;
  
      // #event-source
  
      final Http http = Http.get(system);
      Function<HttpRequest, CompletionStage<HttpResponse>> send =
          (request) -> http.singleRequest(request);
  
      final Uri targetUri = Uri.create(String.format("http://%s:%d", host, port));
      final Optional<String> lastEventId = Optional.of("2");
      Source<ServerSentEvent, NotUsed> eventSource =
          EventSource.create(targetUri, send, lastEventId, system);
      // #event-source
  
      // #consume-events
      int elements = 1;
      Duration per = Duration.ofMillis(500);
      int maximumBurst = 1;
  
      eventSource
          .throttle(elements, per, maximumBurst, ThrottleMode.shaping())
          .take(nrOfSamples)
          .runWith(Sink.seq(), system);
      // #consume-events
    }
  }
  