Package com.societegenerale.failover.dashboard.metrics.source.sharedstore

Record Class RetentionPolicy

java.lang.Object
java.lang.Record
com.societegenerale.failover.dashboard.metrics.source.sharedstore.RetentionPolicy
Record Components:
maxAge - points older than this are evicted
maxEntries - maximum retained points; the oldest are truncated beyond this
public record RetentionPolicy(Duration maxAge, int maxEntries) extends Record
Two independent bounds applied to retained trend history (design ยง5.4): an age bound (maxAge) and a size bound (maxEntries, oldest truncated first). Shared by the in-memory series ring and, later, the JDBC snapshot store so both evict with identical semantics.
Author:
Anand Manissery

  • Constructor Summary

    Constructors
    Constructor
    Description
    RetentionPolicy(Duration maxAge, int maxEntries)
    Validates that both bounds are positive.

  • 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.
    boolean
    isExpired(long timestampMs, long nowMs)
    Checks whether a point is older than maxAge.
    Duration
    maxAge()
    Returns the value of the maxAge record component.
    int
    maxEntries()
    Returns the value of the maxEntries record component.
    final String
    toString()
    Returns a string representation of this record class.

    Methods inherited from class java.lang.Object

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

  • Constructor Details

    • RetentionPolicy

      public RetentionPolicy(Duration maxAge, int maxEntries)
      Validates that both bounds are positive.

  • Method Details

    • isExpired

      public boolean isExpired(long timestampMs, long nowMs)
      Checks whether a point is older than maxAge.
      Parameters:
      timestampMs - the point's capture time, epoch millis
      nowMs - the current time, epoch millis
      Returns:
      true if a point captured at timestampMs is older than maxAge relative to nowMs.

    • 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 '=='.
      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.

    • maxAge

      public Duration maxAge()
      Returns the value of the maxAge record component.
      Returns:
      the value of the maxAge record component

    • maxEntries

      public int maxEntries()
      Returns the value of the maxEntries record component.
      Returns:
      the value of the maxEntries record component