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.dataflow.worker.streaming.config;
  
  import com.google.api.services.dataflow.model.MapTask;
  import com.google.auto.value.AutoValue;
  import java.util.Map;
  import java.util.Optional;
  import javax.annotation.Nullable;
  import org.apache.beam.sdk.annotations.Internal;
  import org.apache.beam.vendor.guava.v32_1_2_jre.com.google.common.collect.ImmutableMap;
  
  @Internal
  @AutoValue
  public abstract class ComputationConfig {
  
    public static ComputationConfig create(
        MapTask mapTask,
        @Nullable Map<String, String> userTransformToStateFamilyName,
        Map<String, String> stateNameMap) {
      return new AutoValue_ComputationConfig(
          mapTask,
          Optional.ofNullable(userTransformToStateFamilyName)
              .map(ImmutableMap::copyOf)
              .orElseGet(ImmutableMap::of),
          ImmutableMap.copyOf(stateNameMap));
    }
  
    public abstract MapTask mapTask();
  
    public abstract ImmutableMap<String, String> userTransformToStateFamilyName();
  
    public abstract ImmutableMap<String, String> stateNameMap();
  
    /** Interface to fetch configurations for a specific computation. */
    public interface Fetcher {
      default void start() {}
  
      default void stop() {}
  
      Optional<ComputationConfig> fetchConfig(String computationId);
  
      StreamingGlobalConfigHandle getGlobalConfigHandle();
    }
  }
  