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.samza.container;
  
  import java.time.Duration;
  import org.apache.samza.application.SamzaApplication;
  import org.apache.samza.application.descriptors.ApplicationDescriptor;
  import org.apache.samza.application.descriptors.ApplicationDescriptorImpl;
  import org.apache.samza.application.descriptors.ApplicationDescriptorUtil;
  import org.apache.samza.config.Config;
  import org.apache.samza.config.ShellCommandConfig;
  import org.apache.samza.context.ExternalContext;
  import org.apache.samza.job.ApplicationStatus;
  import org.apache.samza.runtime.ApplicationRunner;
  import org.apache.samza.runtime.ContainerLaunchUtil;
  import org.apache.samza.util.SamzaUncaughtExceptionHandler;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /** Runs the beam Yarn container, using the static global job model. */
  @SuppressWarnings({
    "rawtypes", // TODO(https://github.com/apache/beam/issues/20447)
    "nullness" // TODO(https://github.com/apache/beam/issues/20497)
  })
  public class BeamContainerRunner implements ApplicationRunner {
    private static final Logger LOG = LoggerFactory.getLogger(BeamContainerRunner.class);
  
    @SuppressWarnings("rawtypes")
    private final ApplicationDescriptorImpl<? extends ApplicationDescriptor> appDesc;
  
    @SuppressWarnings("rawtypes")
    public BeamContainerRunner(SamzaApplication app, Config config) {
      this.appDesc = ApplicationDescriptorUtil.getAppDescriptor(app, config);
    }
  
    @Override
    public void run(ExternalContext externalContext) {
      Thread.setDefaultUncaughtExceptionHandler(
          new SamzaUncaughtExceptionHandler(
              () -> {
                LOG.info("Exiting process now.");
                System.exit(1);
              }));
  
      ContainerLaunchUtil.run(
          appDesc, System.getenv(ShellCommandConfig.ENV_CONTAINER_ID), ContainerCfgLoader.jobModel);
    }
  
    @Override
    public void kill() {
      // Do nothing. Yarn will kill the container.
    }
  
    @Override
    public ApplicationStatus status() {
      // The container is running during the life span of this object.
      return ApplicationStatus.Running;
    }
  
    @Override
    public void waitForFinish() {
      // Container run is synchronous
      // so calling waitForFinish() after run() should return immediately
      LOG.info("Container has stopped");
    }
  
    @Override
    public boolean waitForFinish(Duration timeout) {
      // Container run is synchronous
      // so calling waitForFinish() after run() should return immediately
      LOG.info("Container has stopped");
      return true;
    }
  }
  