content: /*
   * Copyright (C) 2018-2024 Lightbend Inc. <http://www.lightbend.com>
   * Copyright 2016, gRPC Authors All rights reserved.
   *
   * Licensed 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 akka.grpc.benchmarks.driver;
  
  import akka.actor.ActorSystem;
  import akka.actor.Cancellable;
  import akka.grpc.GrpcClientSettings;
  import akka.grpc.benchmarks.Utils;
  import akka.grpc.benchmarks.proto.Control;
  import akka.grpc.benchmarks.proto.Stats;
  import akka.grpc.benchmarks.proto.WorkerServiceClient;
  import akka.stream.SystemMaterializer;
  import akka.stream.KillSwitches;
  import akka.stream.Materializer;
  import akka.stream.SharedKillSwitch;
  import akka.stream.javadsl.Sink;
  import akka.stream.javadsl.Source;
  import com.typesafe.config.Config;
  import com.typesafe.config.ConfigFactory;
  import org.junit.After;
  import org.junit.Before;
  import org.junit.Ignore;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  import org.junit.runners.JUnit4;
  import org.scalatestplus.junit.JUnitSuite;
  
  import java.net.InetSocketAddress;
  import java.time.Duration;
  import java.util.concurrent.CompletionStage;
  import java.util.concurrent.LinkedBlockingQueue;
  import java.util.concurrent.TimeUnit;
  
  import static org.junit.Assert.assertTrue;
  
  /**
   * Basic tests for {@link akka.grpc.benchmarks.driver.LoadWorker}
   */
  @RunWith(JUnit4.class)
  public class LoadWorkerTest extends JUnitSuite {
  
  
    private static final int TIMEOUT = 5;
    private static final Control.ClientArgs MARK = Control.ClientArgs.newBuilder()
        .setMark(Control.Mark.newBuilder().setReset(true).build())
        .build();
  
    private LoadWorker worker;
    private WorkerServiceClient workerServiceStub;
  
    private ActorSystem system;
    private Materializer mat;
  
    @Before
    public void setup() throws Exception {
      // important to enable HTTP/2 in ActorSystem's config
      Config conf = ConfigFactory.parseString("akka.http.server.enable-http2 = on")
          .withFallback(ConfigFactory.defaultApplication());
      system = ActorSystem.create("LoadWorkerTest", conf);
      mat = SystemMaterializer.get(system).materializer();
  
      int port = Utils.pickUnusedPort();
      worker = new LoadWorker(system, port, 0);
      worker.start().toCompletableFuture().get(10, TimeUnit.SECONDS);
      GrpcClientSettings settings = Utils.createGrpcClientSettings(new InetSocketAddress("127.0.0.1", port), true, system);
      workerServiceStub = WorkerServiceClient.create(settings, system);
    }
  
    @After
    public void tearDown() throws Exception {
      if (system != null) {
        workerServiceStub.close();
        system.terminate();
        system.getWhenTerminated().toCompletableFuture().get(10, TimeUnit.SECONDS);
      }
    }
  
    @Ignore // SYNC_CLIENT not implemented
    public void runUnaryBlockingClosedLoop() throws Exception {
      Control.ServerArgs.Builder serverArgsBuilder = Control.ServerArgs.newBuilder();
      serverArgsBuilder.getSetupBuilder()
          .setServerType(Control.ServerType.ASYNC_SERVER)
          .setAsyncServerThreads(4)
          .setPort(0)
          .getPayloadConfigBuilder().getSimpleParamsBuilder().setRespSize(1000);
      int serverPort = startServer(serverArgsBuilder.build());
  
      Control.ClientArgs.Builder clientArgsBuilder = Control.ClientArgs.newBuilder();
      String serverAddress = "localhost:" + serverPort;
      clientArgsBuilder.getSetupBuilder()
          .setClientType(Control.ClientType.SYNC_CLIENT)
          .setRpcType(Control.RpcType.UNARY)
          .setClientChannels(2)
          .setOutstandingRpcsPerChannel(2)
          .addServerTargets(serverAddress);
      clientArgsBuilder.getSetupBuilder().getPayloadConfigBuilder().getSimpleParamsBuilder()
          .setReqSize(1000)
          .setRespSize(1000);
      clientArgsBuilder.getSetupBuilder().getHistogramParamsBuilder()
          .setResolution(0.01)
          .setMaxPossible(60000000000.0);
      assertWorkOccurred(clientArgsBuilder.build());
    }
  
    @Test
    public void runUnaryAsyncClosedLoop() throws Exception {
      Control.ServerArgs.Builder serverArgsBuilder = Control.ServerArgs.newBuilder();
      serverArgsBuilder.getSetupBuilder()
          .setServerType(Control.ServerType.ASYNC_SERVER)
          .setAsyncServerThreads(4)
          .setPort(0)
          .getPayloadConfigBuilder().getSimpleParamsBuilder().setRespSize(1000);
      int serverPort = startServer(serverArgsBuilder.build());
  
      Control.ClientArgs.Builder clientArgsBuilder = Control.ClientArgs.newBuilder();
      String serverAddress = "localhost:" + serverPort;
      clientArgsBuilder.getSetupBuilder()
          .setClientType(Control.ClientType.ASYNC_CLIENT)
          .setClientChannels(2)
          .setRpcType(Control.RpcType.UNARY)
          .setOutstandingRpcsPerChannel(1)
          .setAsyncClientThreads(4)
          .addServerTargets(serverAddress);
      clientArgsBuilder.getSetupBuilder().getPayloadConfigBuilder().getSimpleParamsBuilder()
          .setReqSize(1000)
          .setRespSize(1000);
      clientArgsBuilder.getSetupBuilder().getHistogramParamsBuilder()
          .setResolution(0.01)
          .setMaxPossible(60000000000.0);
      assertWorkOccurred(clientArgsBuilder.build());
    }
  
    @Test
    public void runPingPongAsyncClosedLoop() throws Exception {
      Control.ServerArgs.Builder serverArgsBuilder = Control.ServerArgs.newBuilder();
      serverArgsBuilder.getSetupBuilder()
          .setServerType(Control.ServerType.ASYNC_SERVER)
          .setAsyncServerThreads(4)
          .setPort(0)
          .getPayloadConfigBuilder().getSimpleParamsBuilder().setRespSize(1000);
      int serverPort = startServer(serverArgsBuilder.build());
  
      Control.ClientArgs.Builder clientArgsBuilder = Control.ClientArgs.newBuilder();
      String serverAddress = "localhost:" + serverPort;
      clientArgsBuilder.getSetupBuilder()
          .setClientType(Control.ClientType.ASYNC_CLIENT)
          .setClientChannels(2)
          .setRpcType(Control.RpcType.STREAMING)
          .setOutstandingRpcsPerChannel(1)
          .setAsyncClientThreads(4)
          .addServerTargets(serverAddress);
      clientArgsBuilder.getSetupBuilder().getPayloadConfigBuilder().getSimpleParamsBuilder()
          .setReqSize(1000)
          .setRespSize(1000);
      clientArgsBuilder.getSetupBuilder().getHistogramParamsBuilder()
          .setResolution(0.01)
          .setMaxPossible(60000000000.0);
      assertWorkOccurred(clientArgsBuilder.build());
    }
  
    @Ignore // ASYNC_GENERIC_SERVER not implemented
    public void runGenericPingPongAsyncClosedLoop() throws Exception {
      Control.ServerArgs.Builder serverArgsBuilder = Control.ServerArgs.newBuilder();
      serverArgsBuilder.getSetupBuilder()
          .setServerType(Control.ServerType.ASYNC_GENERIC_SERVER)
          .setAsyncServerThreads(4)
          .setPort(0)
          .getPayloadConfigBuilder().getBytebufParamsBuilder().setReqSize(1000).setRespSize(1000);
      int serverPort = startServer(serverArgsBuilder.build());
  
      Control.ClientArgs.Builder clientArgsBuilder = Control.ClientArgs.newBuilder();
      String serverAddress = "localhost:" + serverPort;
      clientArgsBuilder.getSetupBuilder()
          .setClientType(Control.ClientType.ASYNC_CLIENT)
          .setClientChannels(2)
          .setRpcType(Control.RpcType.STREAMING)
          .setOutstandingRpcsPerChannel(1)
          .setAsyncClientThreads(4)
          .addServerTargets(serverAddress);
      clientArgsBuilder.getSetupBuilder().getPayloadConfigBuilder().getBytebufParamsBuilder()
          .setReqSize(1000)
          .setRespSize(1000);
      clientArgsBuilder.getSetupBuilder().getHistogramParamsBuilder()
          .setResolution(0.01)
          .setMaxPossible(60000000000.0);
      assertWorkOccurred(clientArgsBuilder.build());
    }
  
    private void assertWorkOccurred(Control.ClientArgs clientArgs) throws Exception {
  
      LinkedBlockingQueue<Stats.ClientStats> marksQueue = new LinkedBlockingQueue<Stats.ClientStats>();
  
      SharedKillSwitch killSwitch = KillSwitches.shared("quit");
  
      Source<Control.ClientArgs, Cancellable> marksPolling =
          Source.tick(Duration.ofMillis(300), Duration.ofMillis(300), MARK)
            .via(killSwitch.flow());
  
      Source.single(clientArgs);
  
      CompletionStage<Stats.ClientStats> clientStats = workerServiceStub.runClient(Source.single(clientArgs).concat(marksPolling))
          .map(clientStatus -> clientStatus.getStats())
          .filter(stats -> stats.hasLatencies() && stats.getLatencies().getCount() > 10)
          .runWith(Sink.head(), mat);
  
      Stats.ClientStats stat = clientStats.toCompletableFuture().get(TIMEOUT, TimeUnit.SECONDS);
  
      assertTrue(stat.hasLatencies());
      assertTrue(stat.getLatencies().getCount() < stat.getLatencies().getSum());
      double mean = stat.getLatencies().getSum() / stat.getLatencies().getCount();
      System.out.println("Mean " + mean + " us");
      assertTrue(mean > stat.getLatencies().getMinSeen());
      assertTrue(mean < stat.getLatencies().getMaxSeen());
    }
  
    private int startServer(Control.ServerArgs serverArgs) throws Exception {
      CompletionStage<Control.ServerStatus> response = workerServiceStub.runServer(Source.single(serverArgs))
          .runWith(Sink.head(), mat);
      Control.ServerStatus serverStatus = response.toCompletableFuture().get(TIMEOUT, TimeUnit.SECONDS);
      return serverStatus.getPort();
    }
  }
  