Package org.apache.iotdb.db.wal.utils

Class CheckpointFileUtils

  • public class CheckpointFileUtils
extends java.lang.Object

    • Field Summary

      Fields 
      Modifier and Type Field Description
      static java.util.regex.Pattern CHECKPOINT_FILE_NAME_PATTERN
      versionId is a self-incremented id number, helping to maintain the order of checkpoint files

    • Method Summary

      All Methods Static Methods Concrete Methods 
      Modifier and Type Method Description
      static boolean checkpointFilenameFilter​(java.io.File dir, java.lang.String name)
      Return true when this file is .checkpoint file
      static void descSortByVersionId​(java.io.File[] checkpointFiles)
      Sort checkpoint files by version id with descending order *
      static java.lang.String getLogFileName​(long version)
      Get .checkpoint filename
      static java.io.File[] listAllCheckpointFiles​(java.io.File dir)
      List all .checkpoint files in the directory
      static int parseVersionId​(java.lang.String filename)
      Parse version id from filename

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    • Field Detail

      • CHECKPOINT_FILE_NAME_PATTERN

        public static final java.util.regex.Pattern CHECKPOINT_FILE_NAME_PATTERN
        versionId is a self-incremented id number, helping to maintain the order of checkpoint files

    • Constructor Detail

      • CheckpointFileUtils

        public CheckpointFileUtils()

    • Method Detail

      • checkpointFilenameFilter

        public static boolean checkpointFilenameFilter​(java.io.File dir,
                                               java.lang.String name)
        Return true when this file is .checkpoint file

      • listAllCheckpointFiles

        public static java.io.File[] listAllCheckpointFiles​(java.io.File dir)
        List all .checkpoint files in the directory

      • parseVersionId

        public static int parseVersionId​(java.lang.String filename)
        Parse version id from filename

      • descSortByVersionId

        public static void descSortByVersionId​(java.io.File[] checkpointFiles)
        Sort checkpoint files by version id with descending order *

      • getLogFileName

        public static java.lang.String getLogFileName​(long version)
        Get .checkpoint filename