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.fnexecution;
  
  import java.util.concurrent.ExecutorService;
  import java.util.concurrent.Executors;
  import org.apache.beam.fn.harness.FnHarness;
  import org.apache.beam.model.pipeline.v1.Endpoints.ApiServiceDescriptor;
  import org.apache.beam.model.pipeline.v1.RunnerApi.Environment;
  import org.apache.beam.runners.fnexecution.control.ControlClientPool;
  import org.apache.beam.runners.fnexecution.control.FnApiControlClientPoolService;
  import org.apache.beam.runners.fnexecution.control.InstructionRequestHandler;
  import org.apache.beam.runners.fnexecution.control.MapControlClientPool;
  import org.apache.beam.runners.fnexecution.control.SdkHarnessClient;
  import org.apache.beam.runners.fnexecution.data.GrpcDataService;
  import org.apache.beam.runners.fnexecution.environment.EmbeddedEnvironmentFactory;
  import org.apache.beam.runners.fnexecution.logging.GrpcLoggingService;
  import org.apache.beam.runners.fnexecution.logging.Slf4jLogWriter;
  import org.apache.beam.sdk.fn.server.GrpcContextHeaderAccessorProvider;
  import org.apache.beam.sdk.fn.server.GrpcFnServer;
  import org.apache.beam.sdk.fn.server.InProcessServerFactory;
  import org.apache.beam.sdk.fn.stream.OutboundObserverFactory;
  import org.apache.beam.sdk.options.PipelineOptionsFactory;
  import org.apache.beam.vendor.guava.v32_1_2_jre.com.google.common.util.concurrent.ThreadFactoryBuilder;
  import org.junit.Rule;
  import org.junit.rules.ExternalResource;
  import org.junit.rules.TestRule;
  import org.junit.rules.Timeout;
  
  /**
   * A {@link TestRule} which creates a {@link FnHarness} in a thread, services required for that
   * {@link FnHarness} to properly execute, and provides access to the associated client and harness
   * during test execution.
   */
  public class EmbeddedSdkHarness extends ExternalResource implements TestRule {
    @Rule public transient Timeout globalTimeout = Timeout.seconds(600);
  
    public static EmbeddedSdkHarness create() {
      return new EmbeddedSdkHarness();
    }
  
    private ExecutorService executor;
    private GrpcFnServer<GrpcLoggingService> loggingServer;
    private GrpcFnServer<GrpcDataService> dataServer;
    private GrpcFnServer<FnApiControlClientPoolService> controlServer;
  
    private SdkHarnessClient client;
  
    private EmbeddedSdkHarness() {}
  
    public SdkHarnessClient client() {
      return client;
    }
  
    public ApiServiceDescriptor dataEndpoint() {
      return dataServer.getApiServiceDescriptor();
    }
  
    @Override
    protected void before() throws Exception {
      InProcessServerFactory serverFactory = InProcessServerFactory.create();
      executor = Executors.newCachedThreadPool(new ThreadFactoryBuilder().setDaemon(true).build());
      ControlClientPool clientPool = MapControlClientPool.create();
      FnApiControlClientPoolService clientPoolService =
          FnApiControlClientPoolService.offeringClientsToPool(
              clientPool.getSink(), GrpcContextHeaderAccessorProvider.getHeaderAccessor());
  
      loggingServer =
          GrpcFnServer.allocatePortAndCreateFor(
              GrpcLoggingService.forWriter(Slf4jLogWriter.getDefault()), serverFactory);
      dataServer =
          GrpcFnServer.allocatePortAndCreateFor(
              GrpcDataService.create(
                  PipelineOptionsFactory.create(), executor, OutboundObserverFactory.serverDirect()),
              serverFactory);
      controlServer = GrpcFnServer.allocatePortAndCreateFor(clientPoolService, serverFactory);
  
      InstructionRequestHandler requestHandler =
          EmbeddedEnvironmentFactory.create(
                  PipelineOptionsFactory.create(),
                  loggingServer,
                  controlServer,
                  clientPool.getSource())
              // The EmbeddedEnvironmentFactory can only create Java environments, regardless of the
              // Environment that's passed to it.
              .createEnvironment(Environment.getDefaultInstance(), "embedded_worker")
              .getInstructionRequestHandler();
  
      client = SdkHarnessClient.usingFnApiClient(requestHandler, dataServer.getService());
    }
  
    @Override
    protected void after() {
      try (AutoCloseable logs = loggingServer;
          AutoCloseable data = dataServer;
          AutoCloseable ctl = controlServer;
          AutoCloseable c = client) {
        executor.shutdownNow();
      } catch (Exception e) {
        throw new RuntimeException(e);
      }
    }
  }
  