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.io.util;
  
  import java.io.IOException;
  import java.nio.file.FileStore;
  import java.util.function.Consumer;
  
  public class FileStoreUtils
  {
      /**
       * Try and get the total space of the given filestore
       * @return long value of available space if no errors
       *         Long.MAX_VALUE if on a large file system that overflows
       *         0 on exception during IOToLongFunction
       */
      public static long tryGetSpace(FileStore filestore, PathUtils.IOToLongFunction<FileStore> getSpace)
      {
          return tryGetSpace(filestore, getSpace, ignore -> {});
      }
  
      public static long tryGetSpace(FileStore filestore, PathUtils.IOToLongFunction<FileStore> getSpace, Consumer<IOException> orElse)
      {
          try
          {
              return handleLargeFileSystem(getSpace.apply(filestore));
          }
          catch (IOException e)
          {
              orElse.accept(e);
              return 0L;
          }
      }
  
      /**
       * Private constructor as the class contains only static methods.
       */
      private FileStoreUtils()
      {
      }
  
      /**
       * Handle large file system by returning {@code Long.MAX_VALUE} when the size overflows.
       * @param size returned by the Java's FileStore methods
       * @return the size or {@code Long.MAX_VALUE} if the size was bigger than {@code Long.MAX_VALUE}
       */
      private static long handleLargeFileSystem(long size)
      {
          return size < 0 ? Long.MAX_VALUE : size;
      }
  }
  