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;
  
  import org.apache.beam.runners.jobsubmission.JobServerDriver;
  import org.apache.beam.sdk.fn.server.ServerFactory;
  import org.apache.beam.sdk.io.FileSystems;
  import org.apache.beam.sdk.options.PipelineOptions;
  import org.apache.beam.sdk.options.PipelineOptionsFactory;
  import org.kohsuke.args4j.CmdLineException;
  import org.kohsuke.args4j.CmdLineParser;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /** Driver program that starts a job server for the Samza runner. */
  public class SamzaJobServerDriver extends JobServerDriver {
  
    private static final Logger LOG = LoggerFactory.getLogger(SamzaJobServerDriver.class);
  
    /** Samza runner-specific Configuration for the jobServer. */
    public static class SamzaServerConfiguration extends ServerConfiguration {}
  
    public static void main(String[] args) {
      // TODO: Expose the fileSystem related options.
      PipelineOptions options = PipelineOptionsFactory.create();
      // Register standard file systems.
      FileSystems.setDefaultPipelineOptions(options);
      fromParams(args).run();
    }
  
    private static SamzaJobServerDriver fromParams(String[] args) {
      return fromConfig(parseArgs(args));
    }
  
    private static void printUsage(CmdLineParser parser) {
      System.err.printf("Usage: java %s arguments...%n", SamzaJobServerDriver.class.getSimpleName());
      parser.printUsage(System.err);
      System.err.println();
    }
  
    private static SamzaJobServerDriver fromConfig(SamzaServerConfiguration configuration) {
      return create(
          configuration,
          createJobServerFactory(configuration),
          createArtifactServerFactory(configuration));
    }
  
    public static SamzaServerConfiguration parseArgs(String[] args) {
      SamzaServerConfiguration configuration = new SamzaServerConfiguration();
      CmdLineParser parser = new CmdLineParser(configuration);
      try {
        parser.parseArgument(args);
      } catch (CmdLineException e) {
        LOG.error("Unable to parse command line arguments.", e);
        printUsage(parser);
        throw new IllegalArgumentException("Unable to parse command line arguments.", e);
      }
      return configuration;
    }
  
    private static SamzaJobServerDriver create(
        SamzaServerConfiguration configuration,
        ServerFactory jobServerFactory,
        ServerFactory artifactServerFactory) {
      return new SamzaJobServerDriver(configuration, jobServerFactory, artifactServerFactory);
    }
  
    private SamzaJobServerDriver(
        SamzaServerConfiguration configuration,
        ServerFactory jobServerFactory,
        ServerFactory artifactServerFactory) {
      this(
          configuration,
          jobServerFactory,
          artifactServerFactory,
          () -> SamzaJobInvoker.create(configuration));
    }
  
    protected SamzaJobServerDriver(
        ServerConfiguration configuration,
        ServerFactory jobServerFactory,
        ServerFactory artifactServerFactory,
        JobInvokerFactory jobInvokerFactory) {
      super(configuration, jobServerFactory, artifactServerFactory, jobInvokerFactory);
    }
  }
  