compiler/frontend/beam/src/main/java/org/apache/nemo/compiler/frontend/beam/NemoRunnerRegistrar.java

/*
 * 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.nemo.compiler.frontend.beam;

import com.google.auto.service.AutoService;
import com.google.common.collect.ImmutableList;
import org.apache.beam.sdk.PipelineRunner;
import org.apache.beam.sdk.options.PipelineOptions;
import org.apache.beam.sdk.options.PipelineOptionsRegistrar;
import org.apache.beam.sdk.runners.PipelineRunnerRegistrar;

/**
 * Contains the {@link PipelineRunnerRegistrar} and {@link PipelineOptionsRegistrar} for the {@link NemoRunner}.
 *
 * {@link AutoService} will register Nemo's implementations of the {@link PipelineRunner} and {@link PipelineOptions}
 * as available pipeline runner services.
 */
public final class NemoRunnerRegistrar {
  /**
   * Private constructor.
   */
  private NemoRunnerRegistrar() {
  }

  /**
   * Registers the {@link NemoRunner}.
   */
  @AutoService(PipelineRunnerRegistrar.class)
  public static final class Runner implements PipelineRunnerRegistrar {
    @Override
    public Iterable<Class<? extends PipelineRunner<?>>> getPipelineRunners() {
      return ImmutableList.of(NemoRunner.class);
    }
  }

  /**
   * Registers the {@link NemoPipelineOptions}.
   */
  @AutoService(PipelineOptionsRegistrar.class)
  public static final class Options implements PipelineOptionsRegistrar {
    @Override
    public Iterable<Class<? extends PipelineOptions>> getPipelineOptions() {
      return ImmutableList.of(NemoPipelineOptions.class);
    }
  }
}