Enum HashAlgorithm

java.lang.Object
java.lang.Enum<HashAlgorithm>
net.rubyeye.xmemcached.HashAlgorithm
All Implemented Interfaces:
Serializable, Comparable<HashAlgorithm>, java.lang.constant.Constable

public enum HashAlgorithm extends Enum<HashAlgorithm>
Known hashing algorithms for locating a server for a key. Note that all hash algorithms return 64-bits of hash, but only the lower 32-bits are significant. This allows a positive 32-bit number to be returned for all cases.
  • Enum Constant Details

    • NATIVE_HASH

      public static final HashAlgorithm NATIVE_HASH
      Native hash (String.hashCode()).
    • CRC32_HASH

      public static final HashAlgorithm CRC32_HASH
      CRC32_HASH as used by the perl API. This will be more consistent both across multiple API users as well as java versions, but is mostly likely significantly slower.
    • FNV1_64_HASH

      public static final HashAlgorithm FNV1_64_HASH
      FNV hashes are designed to be fast while maintaining a low collision rate. The FNV speed allows one to quickly hash lots of data while maintaining a reasonable collision rate.
    • FNV1A_64_HASH

      public static final HashAlgorithm FNV1A_64_HASH
      Variation of FNV.
    • FNV1_32_HASH

      public static final HashAlgorithm FNV1_32_HASH
      32-bit FNV1.
    • FNV1A_32_HASH

      public static final HashAlgorithm FNV1A_32_HASH
      32-bit FNV1a.
    • KETAMA_HASH

      public static final HashAlgorithm KETAMA_HASH
      MD5-based hash algorithm used by ketama.
    • MYSQL_HASH

      public static final HashAlgorithm MYSQL_HASH
      From mysql source
    • ELF_HASH

      public static final HashAlgorithm ELF_HASH
    • RS_HASH

      public static final HashAlgorithm RS_HASH
    • LUA_HASH

      public static final HashAlgorithm LUA_HASH
      From lua source,it is used for long key
    • ELECTION_HASH

      public static final HashAlgorithm ELECTION_HASH
    • ONE_AT_A_TIME

      public static final HashAlgorithm ONE_AT_A_TIME
      The Jenkins One-at-a-time hash ,please see http://www.burtleburtle.net/bob/hash/doobs.html
  • Field Details

  • Constructor Details

    • HashAlgorithm

      private HashAlgorithm()
  • Method Details

    • values

      public static HashAlgorithm[] values()
      Returns an array containing the constants of this enum type, in the order they are declared.
      Returns:
      an array containing the constants of this enum type, in the order they are declared
    • valueOf

      public static HashAlgorithm valueOf(String name)
      Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)
      Parameters:
      name - the name of the enum constant to be returned.
      Returns:
      the enum constant with the specified name
      Throws:
      IllegalArgumentException - if this enum type has no constant with the specified name
      NullPointerException - if the argument is null
    • hash

      public long hash(String k)
      Compute the hash for the given key.
      Returns:
      a positive integer hash
    • computeMd5

      public static byte[] computeMd5(String k)
      Get the md5 of the given key.