Record Class WalCompactor.CompactionSnapshot

java.lang.Object
java.lang.Record
com.loomcache.server.persistence.WalCompactor.CompactionSnapshot
Enclosing class:
WalCompactor
public static record WalCompactor.CompactionSnapshot(long snapshotIndex, long snapshotTerm, byte[] state) extends Record
Snapshot boundary and state to use for one automatic compaction.

The snapshot index and term must identify a committed/applied WAL entry. The state bytes must represent the state machine exactly at that boundary; entries after the boundary are retained in the WAL.

  • Constructor Summary

    Constructors
    Constructor
    Description
    CompactionSnapshot(long snapshotIndex, long snapshotTerm, byte[] state)
    Creates an instance of a CompactionSnapshot record class.

  • Method Summary

    Modifier and Type
    Method
    Description
    final boolean
    equals(Object o)
    Indicates whether some other object is "equal to" this one.
    final int
    hashCode()
    Returns a hash code value for this object.
    long
    snapshotIndex()
    Returns the value of the snapshotIndex record component.
    long
    snapshotTerm()
    Returns the value of the snapshotTerm record component.
    byte[]
    state()
    Returns the value of the state record component.
    final String
    toString()
    Returns a string representation of this record class.

    Methods inherited from class Object

    clone, finalize, getClass, notify, notifyAll, wait, wait, wait

  • Constructor Details

    • CompactionSnapshot

      public CompactionSnapshot(long snapshotIndex, long snapshotTerm, byte[] state)
      Creates an instance of a CompactionSnapshot record class.
      Parameters:
      snapshotIndex - the value for the snapshotIndex record component
      snapshotTerm - the value for the snapshotTerm record component
      state - the value for the state record component

  • Method Details

    • toString

      public final String toString()
      Returns a string representation of this record class. The representation contains the name of the class, followed by the name and value of each of the record components.
      Specified by:
      toString in class Record
      Returns:
      a string representation of this object

    • hashCode

      public final int hashCode()
      Returns a hash code value for this object. The value is derived from the hash code of each of the record components.
      Specified by:
      hashCode in class Record
      Returns:
      a hash code value for this object

    • equals

      public final boolean equals(Object o)
      Indicates whether some other object is "equal to" this one. The objects are equal if the other object is of the same class and if all the record components are equal. Reference components are compared with Objects::equals(Object,Object); primitive components are compared with the compare method from their corresponding wrapper classes.
      Specified by:
      equals in class Record
      Parameters:
      o - the object with which to compare
      Returns:
      true if this object is the same as the o argument; false otherwise.

    • snapshotIndex

      public long snapshotIndex()
      Returns the value of the snapshotIndex record component.
      Returns:
      the value of the snapshotIndex record component

    • snapshotTerm

      public long snapshotTerm()
      Returns the value of the snapshotTerm record component.
      Returns:
      the value of the snapshotTerm record component

    • state

      public byte[] state()
      Returns the value of the state record component.
      Returns:
      the value of the state record component