content: /*
   * The Alluxio Open Foundation licenses this work under the Apache License, version 2.0
   * (the "License"). You may not use this work except in compliance with the License, which is
   * available at www.apache.org/licenses/LICENSE-2.0
   *
   * This software is distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
   * either express or implied, as more fully set forth in the License.
   *
   * See the NOTICE file distributed with this work for information regarding copyright ownership.
   */
  
  package alluxio.cli.fs.command;
  
  import alluxio.AlluxioURI;
  import alluxio.annotation.PublicApi;
  import alluxio.cli.CommandUtils;
  import alluxio.client.file.FileSystemContext;
  import alluxio.exception.AlluxioException;
  import alluxio.exception.status.InvalidArgumentException;
  import alluxio.grpc.ListStatusPOptions;
  import alluxio.util.FormatUtils;
  
  import com.google.common.annotations.VisibleForTesting;
  import org.apache.commons.cli.CommandLine;
  import org.apache.commons.cli.Option;
  import org.apache.commons.cli.Options;
  
  import java.io.IOException;
  import java.util.concurrent.atomic.AtomicLong;
  import javax.annotation.concurrent.ThreadSafe;
  
  /**
   * Displays the number of folders and files matching the specified prefix in args.
   */
  @ThreadSafe
  @PublicApi
  public final class CountCommand extends AbstractFileSystemCommand {
    @VisibleForTesting
    public static final String COUNT_FORMAT = "%-25s%-25s%-15s%n";
  
    private static final String READABLE_OPTION_NAME = "h";
  
    private static final Option READABLE_OPTION =
            Option.builder(READABLE_OPTION_NAME)
                    .required(false)
                    .hasArg(false)
                    .desc("print sizes in human readable format (e.g. 1KB 234MB 2GB)")
                    .build();
  
    /**
     * @param fsContext the filesystem of Alluxio
     */
    public CountCommand(FileSystemContext fsContext) {
      super(fsContext);
    }
  
    @Override
    public String getCommandName() {
      return "count";
    }
  
    @Override
    public void validateArgs(CommandLine cl) throws InvalidArgumentException {
      CommandUtils.checkNumOfArgsEquals(this, cl, 1);
    }
  
    @Override
    public int run(CommandLine cl) throws AlluxioException, IOException {
      String[] args = cl.getArgs();
      AlluxioURI inputPath = new AlluxioURI(args[0]);
  
      AtomicLong fileCount = new AtomicLong();
      AtomicLong folderCount = new AtomicLong();
      AtomicLong folderSize = new AtomicLong();
  
      ListStatusPOptions options = ListStatusPOptions.newBuilder().setRecursive(true).build();
      mFileSystem.iterateStatus(inputPath, options, uriStatus -> {
        if (uriStatus.isFolder()) {
          folderCount.incrementAndGet();
        } else {
          fileCount.incrementAndGet();
          folderSize.getAndAdd(uriStatus.getLength());
        }
      });
  
      printInfo(cl.hasOption(READABLE_OPTION_NAME), fileCount.get(), folderCount.get(),
          folderSize.get());
      return 0;
    }
  
    /**
     * Prints the count messages.
     *
     * @param readable whether to print info of human readable format
     * @param fileCount the file count message to print
     * @param folderCount the folder count message to print
     * @param folderSize the folder size message to print
     */
    private void printInfo(boolean readable, long fileCount, long folderCount, long folderSize) {
      String formatFolderSize = readable ? FormatUtils.getSizeFromBytes(folderSize)
              : String.valueOf(folderSize);
      System.out.format(COUNT_FORMAT, "File Count", "Folder Count", "Folder Size");
      System.out.format(COUNT_FORMAT, fileCount, folderCount, formatFolderSize);
    }
  
    @Override
    public String getUsage() {
      return "count [-h] <path>";
    }
  
    @Override
    public String getDescription() {
      return "Displays the number of files and directories matching the specified prefix.";
    }
  
    @Override
    public Options getOptions() {
      return new Options().addOption(READABLE_OPTION);
    }
  }
  