content: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you under the Apache License, Version 2.0 (the
   * "License"); you may not use this file except in compliance
   * with the License.  You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.apache.beam.runners.dataflow.worker.windmill.work.refresh;
  
  import static org.junit.Assert.assertEquals;
  
  import java.util.Optional;
  import org.apache.beam.runners.dataflow.worker.FakeWindmillServer;
  import org.apache.beam.runners.dataflow.worker.streaming.config.FakeGlobalConfigHandle;
  import org.apache.beam.runners.dataflow.worker.streaming.config.StreamingGlobalConfig;
  import org.apache.beam.runners.dataflow.worker.windmill.Windmill.HeartbeatRequest;
  import org.apache.beam.runners.dataflow.worker.windmill.Windmill.UserWorkerRunnerV1Settings;
  import org.apache.beam.runners.dataflow.worker.windmill.client.WindmillStreamPool;
  import org.joda.time.Duration;
  import org.junit.Test;
  import org.junit.rules.ErrorCollector;
  import org.junit.runner.RunWith;
  import org.junit.runners.JUnit4;
  
  @RunWith(JUnit4.class)
  public class StreamPoolHeartbeatSenderTest {
  
    @Test
    public void sendsHeartbeatsOnStream() {
      FakeWindmillServer server = new FakeWindmillServer(new ErrorCollector(), c -> Optional.empty());
      StreamPoolHeartbeatSender heartbeatSender =
          StreamPoolHeartbeatSender.create(
              WindmillStreamPool.create(1, Duration.standardSeconds(10), server::getDataStream));
      Heartbeats.Builder heartbeatsBuilder = Heartbeats.builder();
      heartbeatsBuilder
          .heartbeatRequestsBuilder()
          .put("key", HeartbeatRequest.newBuilder().setWorkToken(123).build());
      heartbeatSender.sendHeartbeats(heartbeatsBuilder.build());
      assertEquals(1, server.getGetDataRequests().size());
    }
  
    @Test
    public void sendsHeartbeatsOnDedicatedStream() {
      FakeWindmillServer dedicatedServer =
          new FakeWindmillServer(new ErrorCollector(), c -> Optional.empty());
      FakeWindmillServer getDataServer =
          new FakeWindmillServer(new ErrorCollector(), c -> Optional.empty());
  
      FakeGlobalConfigHandle configHandle =
          new FakeGlobalConfigHandle(getGlobalConfig(/*useSeparateHeartbeatStreams=*/ true));
      StreamPoolHeartbeatSender heartbeatSender =
          StreamPoolHeartbeatSender.create(
              WindmillStreamPool.create(
                  1, Duration.standardSeconds(10), dedicatedServer::getDataStream),
              WindmillStreamPool.create(
                  1, Duration.standardSeconds(10), getDataServer::getDataStream),
              configHandle);
      Heartbeats.Builder heartbeatsBuilder = Heartbeats.builder();
      heartbeatsBuilder
          .heartbeatRequestsBuilder()
          .put("key", HeartbeatRequest.newBuilder().setWorkToken(123).build());
      heartbeatSender.sendHeartbeats(heartbeatsBuilder.build());
      assertEquals(1, dedicatedServer.getGetDataRequests().size());
      assertEquals(0, getDataServer.getGetDataRequests().size());
  
      heartbeatSender.sendHeartbeats(heartbeatsBuilder.build());
      assertEquals(2, dedicatedServer.getGetDataRequests().size());
      assertEquals(0, getDataServer.getGetDataRequests().size());
  
      // Turn off separate heartbeats
      configHandle.setConfig(getGlobalConfig(/*useSeparateHeartbeatStreams=*/ false));
      heartbeatSender.sendHeartbeats(heartbeatsBuilder.build());
      // request to getDataServer increases and dedicatedServer remains same
      assertEquals(2, dedicatedServer.getGetDataRequests().size());
      assertEquals(1, getDataServer.getGetDataRequests().size());
    }
  
    private static StreamingGlobalConfig getGlobalConfig(boolean useSeparateHeartbeatStreams) {
      return StreamingGlobalConfig.builder()
          .setUserWorkerJobSettings(
              UserWorkerRunnerV1Settings.newBuilder()
                  .setUseSeparateWindmillHeartbeatStreams(useSeparateHeartbeatStreams)
                  .build())
          .build();
    }
  
    @Test
    public void sendsHeartbeatsOnGetDataStream() {
      FakeWindmillServer dedicatedServer =
          new FakeWindmillServer(new ErrorCollector(), c -> Optional.empty());
      FakeWindmillServer getDataServer =
          new FakeWindmillServer(new ErrorCollector(), c -> Optional.empty());
  
      FakeGlobalConfigHandle configHandle =
          new FakeGlobalConfigHandle(getGlobalConfig(/*useSeparateHeartbeatStreams=*/ false));
      StreamPoolHeartbeatSender heartbeatSender =
          StreamPoolHeartbeatSender.create(
              WindmillStreamPool.create(
                  1, Duration.standardSeconds(10), dedicatedServer::getDataStream),
              WindmillStreamPool.create(
                  1, Duration.standardSeconds(10), getDataServer::getDataStream),
              configHandle);
      Heartbeats.Builder heartbeatsBuilder = Heartbeats.builder();
      heartbeatsBuilder
          .heartbeatRequestsBuilder()
          .put("key", HeartbeatRequest.newBuilder().setWorkToken(123).build());
      heartbeatSender.sendHeartbeats(heartbeatsBuilder.build());
      assertEquals(0, dedicatedServer.getGetDataRequests().size());
      assertEquals(1, getDataServer.getGetDataRequests().size());
  
      heartbeatSender.sendHeartbeats(heartbeatsBuilder.build());
      assertEquals(0, dedicatedServer.getGetDataRequests().size());
      assertEquals(2, getDataServer.getGetDataRequests().size());
  
      // Turn on separate heartbeats
      configHandle.setConfig(getGlobalConfig(/*useSeparateHeartbeatStreams=*/ true));
      heartbeatSender.sendHeartbeats(heartbeatsBuilder.build());
      // request to dedicatedServer increases and getDataServer remains same
      assertEquals(1, dedicatedServer.getGetDataRequests().size());
      assertEquals(2, getDataServer.getGetDataRequests().size());
    }
  }
  