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.sideinput;
  
  import java.util.function.Function;
  import org.apache.beam.runners.dataflow.options.DataflowStreamingPipelineOptions;
  import org.apache.beam.runners.dataflow.worker.windmill.Windmill.GlobalData;
  import org.apache.beam.runners.dataflow.worker.windmill.Windmill.GlobalDataRequest;
  import org.apache.beam.sdk.annotations.Internal;
  
  /**
   * Factory class for generating {@link SideInputStateFetcher} instances that share a {@link
   * SideInputCache}.
   */
  @Internal
  public final class SideInputStateFetcherFactory {
    private final SideInputCache globalSideInputCache;
  
    private SideInputStateFetcherFactory(SideInputCache globalSideInputCache) {
      this.globalSideInputCache = globalSideInputCache;
    }
  
    public static SideInputStateFetcherFactory fromOptions(DataflowStreamingPipelineOptions options) {
      return new SideInputStateFetcherFactory(SideInputCache.create(options));
    }
  
    public SideInputStateFetcher createSideInputStateFetcher(
        Function<GlobalDataRequest, GlobalData> fetchGlobalDataFn) {
      return new SideInputStateFetcher(fetchGlobalDataFn, globalSideInputCache);
    }
  }
  