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.bookkeeper.clients.impl.internal.mr;
  
  import static org.apache.bookkeeper.clients.impl.internal.ProtocolInternalUtils.createMetaRangeException;
  
  import com.google.common.util.concurrent.ListenableFuture;
  import java.util.concurrent.ScheduledExecutorService;
  import java.util.function.Function;
  import org.apache.bookkeeper.clients.impl.channel.StorageServerChannel;
  import org.apache.bookkeeper.clients.impl.container.StorageContainerChannel;
  import org.apache.bookkeeper.clients.utils.ListenableFutureRpcProcessor;
  import org.apache.bookkeeper.common.util.Backoff;
  import org.apache.bookkeeper.stream.proto.storage.GetActiveRangesRequest;
  import org.apache.bookkeeper.stream.proto.storage.GetActiveRangesResponse;
  import org.apache.bookkeeper.stream.proto.storage.StatusCode;
  
  /**
   * Request Processor processing meta range request.
   */
  public class MetaRangeRequestProcessor<RespT>
      extends ListenableFutureRpcProcessor<GetActiveRangesRequest, GetActiveRangesResponse, RespT> {
  
      public static <T> MetaRangeRequestProcessor<T> of(
          GetActiveRangesRequest request,
          Function<GetActiveRangesResponse, T> responseFunc,
          StorageContainerChannel channel,
          ScheduledExecutorService executor,
          Backoff.Policy backoffPolicy) {
          return new MetaRangeRequestProcessor<>(request, responseFunc, channel, executor, backoffPolicy);
      }
  
      private final GetActiveRangesRequest request;
      private final Function<GetActiveRangesResponse, RespT> responseFunc;
  
      private MetaRangeRequestProcessor(GetActiveRangesRequest request,
                                        Function<GetActiveRangesResponse, RespT> responseFunc,
                                        StorageContainerChannel channel,
                                        ScheduledExecutorService executor,
                                        Backoff.Policy backoffPolicy) {
          super(channel, executor, backoffPolicy);
          this.request = request;
          this.responseFunc = responseFunc;
      }
  
      @Override
      protected GetActiveRangesRequest createRequest() {
          return request;
      }
  
      @Override
      protected ListenableFuture<GetActiveRangesResponse> sendRPC(StorageServerChannel rsChannel,
                                                                  GetActiveRangesRequest request) {
          return rsChannel.getMetaRangeService().getActiveRanges(request);
      }
  
      private String getIdentifier(GetActiveRangesRequest request) {
  
          return "" + request.getStreamId();
      }
  
      @Override
      protected RespT processResponse(GetActiveRangesResponse response) throws Exception {
          if (StatusCode.SUCCESS == response.getCode()) {
              return responseFunc.apply(response);
          }
  
          throw createMetaRangeException(getIdentifier(request), response.getCode());
      }
  }
  