Package org.apache.cassandra.dht

Class OrderPreservingPartitioner.StringToken

java.lang.Object
org.apache.cassandra.dht.Token
org.apache.cassandra.dht.OrderPreservingPartitioner.StringToken
All Implemented Interfaces:
Serializable, Comparable<Token>, RingPosition<Token>
Enclosing class:
OrderPreservingPartitioner
public static class OrderPreservingPartitioner.StringToken extends Token
See Also:

  • Constructor Details

    • StringToken

      public StringToken(String token)

  • Method Details

    • getPartitioner

      public IPartitioner getPartitioner()
      Specified by:
      getPartitioner in interface RingPosition<Token>
      Specified by:
      getPartitioner in class Token

    • getHeapSize

      public long getHeapSize()
      Specified by:
      getHeapSize in class Token

    • asComparableBytes

      public ByteSource asComparableBytes(ByteComparable.Version version)
      Description copied from class: Token
      Produce a weakly prefix-free byte-comparable representation of the token, i.e. such a sequence of bytes that any pair x, y of valid tokens of this type and any bytes b1, b2 between 0x10 and 0xEF, (+ stands for concatenation) compare(x, y) == compareLexicographicallyUnsigned(asByteComparable(x)+b1, asByteComparable(y)+b2) (i.e. the values compare like the original type, and an added 0x10-0xEF byte at the end does not change that) and: asByteComparable(x)+b1 is not a prefix of asByteComparable(y) (weakly prefix free) (i.e. a valid representation of a value may be a prefix of another valid representation of a value only if the following byte in the latter is smaller than 0x10 or larger than 0xEF). These properties are trivially true if the encoding compares correctly and is prefix free, but also permits a little more freedom that enables somewhat more efficient encoding of arbitrary-length byte-comparable blobs.
      Specified by:
      asComparableBytes in class Token

    • getTokenValue

      public String getTokenValue()
      Specified by:
      getTokenValue in class Token

    • toString

      public String toString()
      Overrides:
      toString in class Object

    • equals

      public boolean equals(Object obj)
      Overrides:
      equals in class Object

    • hashCode

      public int hashCode()
      Overrides:
      hashCode in class Object

    • compareTo

      public int compareTo(Token o)

    • size

      public double size(Token next)
      Description copied from class: Token
      Returns a measure for the token space covered between this token and next. Used by the token allocation algorithm (see CASSANDRA-7032).
      Specified by:
      size in class Token

    • nextValidToken

      public Token nextValidToken()
      Description copied from class: Token
      Returns the next possible token in the token space, one that compares greater than this and such that there is no other token that sits between this token and it in the token order. This is not possible for all token types, esp. for comparison-based tokens such as the LocalPartioner used for classic secondary indexes. Used to avoid clashes between nodes in separate datacentres trying to use the same token via the token allocation algorithm, as well as in constructing token ranges for sstables.
      Specified by:
      nextValidToken in class Token