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.fsadmin.report;
  
  import alluxio.client.file.FileSystemMasterClient;
  import alluxio.util.FormatUtils;
  import alluxio.wire.MountPointInfo;
  
  import java.io.IOException;
  import java.util.Comparator;
  import java.util.Map;
  
  /**
   * Prints under filesystem information.
   */
  public class UfsCommand {
    private FileSystemMasterClient mFileSystemMasterClient;
  
    /**
     * Creates a new instance of {@link UfsCommand}.
     *
     * @param fileSystemMasterClient client to get mount table from
     */
    public UfsCommand(FileSystemMasterClient fileSystemMasterClient) {
      mFileSystemMasterClient = fileSystemMasterClient;
    }
  
    /**
     * Runs report ufs command.
     *
     * @return 0 on success, 1 otherwise
     */
    public int run() throws IOException {
      Map<String, MountPointInfo> mountTable = mFileSystemMasterClient.getMountTable();
      System.out.println("Alluxio under storage system information:");
      printMountInfo(mountTable);
      return 0;
    }
  
    /**
     * Prints mount information for a mount table.
     *
     * @param mountTable the mount table to get information from
     */
    public static void printMountInfo(Map<String, MountPointInfo> mountTable) {
      for (Map.Entry<String, MountPointInfo> entry : mountTable.entrySet()) {
        String mountPoint = entry.getKey();
        MountPointInfo mountPointInfo = entry.getValue();
  
        long capacityBytes = mountPointInfo.getUfsCapacityBytes();
        long usedBytes = mountPointInfo.getUfsUsedBytes();
  
        String usedPercentageInfo = "";
        if (capacityBytes > 0) {
          int usedPercentage = (int) (100.0 * usedBytes / capacityBytes);
          usedPercentageInfo = String.format("(%s%%)", usedPercentage);
        }
  
        String leftAlignFormat = getAlignFormat(mountTable);
  
        System.out.format(leftAlignFormat, mountPointInfo.getUfsUri(), mountPoint,
            mountPointInfo.getUfsType(), FormatUtils.getSizeFromBytes(capacityBytes),
            FormatUtils.getSizeFromBytes(usedBytes) + usedPercentageInfo,
            mountPointInfo.getReadOnly() ? "" : "not ",
            mountPointInfo.getShared() ? "" : "not ");
        System.out.println("properties=" + mountPointInfo.getProperties() + ")");
      }
    }
  
    /**
     * Gets the align format according to the longest mount point/under storage path.
     * @param mountTable the mount table to get information from
     * @return the align format for printing mounted info
     */
    private static String getAlignFormat(Map<String, MountPointInfo> mountTable) {
      int mountPointLength = mountTable.entrySet().stream().map(w -> w.getKey().length())
          .max(Comparator.comparing(Integer::intValue)).get();
      int usfLength = mountTable.entrySet().stream().map(w -> w.getValue().getUfsUri().length())
          .max(Comparator.comparing(Integer::intValue)).get();
  
      String leftAlignFormat = "%-" + usfLength + "s  on  %-" + mountPointLength
          + "s  (%s, capacity=%s, used=%s, %sread-only, %sshared, ";
      return leftAlignFormat;
    }
  }
  