ceph/src/rocksdb/java/src/main/java/org/rocksdb/WalFileType.java

   1 // Copyright (c) 2011-present, Facebook, Inc.  All rights reserved.
   2 //  This source code is licensed under both the GPLv2 (found in the
   3 //  COPYING file in the root directory) and Apache 2.0 License
   4 //  (found in the LICENSE.Apache file in the root directory).
   5
   6 package org.rocksdb;
   7
   8 public enum WalFileType {
   9   /**
  10    * Indicates that WAL file is in archive directory. WAL files are moved from
  11    * the main db directory to archive directory once they are not live and stay
  12    * there until cleaned up. Files are cleaned depending on archive size
  13    * (Options::WAL_size_limit_MB) and time since last cleaning
  14    * (Options::WAL_ttl_seconds).
  15    */
  16   kArchivedLogFile((byte)0x0),
  17
  18   /**
  19    * Indicates that WAL file is live and resides in the main db directory
  20    */
  21   kAliveLogFile((byte)0x1);
  22
  23   private final byte value;
  24
  25   WalFileType(final byte value) {
  26     this.value = value;
  27   }
  28
  29   /**
  30    * Get the internal representation value.
  31    *
  32    * @return the internal representation value
  33    */
  34   byte getValue() {
  35     return value;
  36   }
  37
  38   /**
  39    * Get the WalFileType from the internal representation value.
  40    *
  41    * @return the wal file type.
  42    *
  43    * @throws IllegalArgumentException if the value is unknown.
  44    */
  45   static WalFileType fromValue(final byte value) {
  46     for (final WalFileType walFileType : WalFileType.values()) {
  47       if(walFileType.value == value) {
  48         return walFileType;
  49       }
  50     }
  51
  52     throw new IllegalArgumentException(
  53         "Illegal value provided for WalFileType: " + value);
  54   }
  55 }