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.cassandra.sidecar.client.retry;
  
  import java.util.concurrent.CompletableFuture;
  
  import io.netty.handler.codec.http.HttpResponseStatus;
  import org.apache.cassandra.sidecar.client.HttpResponse;
  import org.apache.cassandra.sidecar.common.request.Request;
  
  /**
   * A retry policy to handle status codes returned from Sidecar server when downloading a file for Live Migration.
   */
  public class LiveMigrationDownloadRetryPolicy extends RetryPolicy
  {
      private final RetryPolicy delegate;
      private final String destinationPath;
  
      public LiveMigrationDownloadRetryPolicy(RetryPolicy delegate, String destinationPath)
      {
          this.delegate = delegate;
          this.destinationPath = destinationPath;
      }
  
      @Override
      public void onResponse(CompletableFuture<HttpResponse> responseFuture,
                             Request request,
                             HttpResponse response,
                             Throwable throwable,
                             int attempts,
                             boolean canRetryOnADifferentHost,
                             RetryAction retryAction)
      {
          if (response != null)
          {
              if (response.statusCode() == HttpResponseStatus.OK.code())
              {
                  logger.debug("Successfully downloaded file={}", destinationPath);
                  responseFuture.complete(response);
                  return;
              }
              else if (response.statusCode() == HttpResponseStatus.NOT_FOUND.code()
                       || response.statusCode() == HttpResponseStatus.REQUESTED_RANGE_NOT_SATISFIABLE.code())
              {
                  // 404 -  FILE NOT FOUND means file does not exist in remote
                  // and no need to download file, hence considering it as success.
                  // 416 -  RANGE NOT SATISFIABLE thrown by sidecar when file
                  // of size length zero is requested.
                  logger.info("File not found at URI={}", request.requestURI());
                  responseFuture.complete(response);
                  return;
              }
          }
          delegate.onResponse(responseFuture, request, response, throwable, attempts, canRetryOnADifferentHost,
                              retryAction);
      }
  }
  