fs2.kafka.Timestamp.scala Maven / Gradle / Ivy
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/*
* Copyright 2018-2024 OVO Energy Limited
*
* SPDX-License-Identifier: Apache-2.0
*/
package fs2.kafka
import cats.{Eq, Show}
import cats.instances.boolean.*
import cats.instances.long.*
import cats.instances.option.*
import cats.syntax.eq.*
/**
* [[Timestamp]] is an optional timestamp value representing a [[createTime]], [[logAppendTime]],
* [[unknownTime]], or no timestamp at all.
*/
sealed abstract class Timestamp {
/**
* Returns the timestamp value, if the timestamp is representing the time when a record was
* created.
*/
def createTime: Option[Long]
/**
* Returns the timestamp value, if the timestamp is representing the time when a record was
* appended to the log.
*/
def logAppendTime: Option[Long]
/**
* Returns the timestamp value, if there is a timestamp, but the type is unknown.
*/
def unknownTime: Option[Long]
/**
* Returns `true` if there is no timestamp value; otherwise `false`.
*/
def isEmpty: Boolean
/**
* Returns `true` if there is a timestamp value; otherwise `false`.
*/
final def nonEmpty: Boolean =
!isEmpty
}
object Timestamp {
/**
* Creates a new [[Timestamp]] instance from the specified timestamp value representing the time
* when the record was created.
*/
def createTime(value: Long): Timestamp =
new Timestamp {
override val createTime: Option[Long] = Some(value)
override val logAppendTime: Option[Long] = None
override val unknownTime: Option[Long] = None
override val isEmpty: Boolean = false
override def toString: String = s"Timestamp(createTime = $value)"
}
/**
* Creates a new [[Timestamp]] instance from the specified timestamp value representing the time
* when the record was appended to the log.
*/
def logAppendTime(value: Long): Timestamp =
new Timestamp {
override val createTime: Option[Long] = None
override val logAppendTime: Option[Long] = Some(value)
override val unknownTime: Option[Long] = None
override val isEmpty: Boolean = false
override def toString: String = s"Timestamp(logAppendTime = $value)"
}
/**
* Creates a new [[Timestamp]] instance from the specified timestamp value, when the timestamp
* type is unknown.
*/
def unknownTime(value: Long): Timestamp =
new Timestamp {
override val createTime: Option[Long] = None
override val logAppendTime: Option[Long] = None
override val unknownTime: Option[Long] = Some(value)
override val isEmpty: Boolean = false
override def toString: String = s"Timestamp(unknownTime = $value)"
}
/**
* The [[Timestamp]] instance without any timestamp values.
*/
val none: Timestamp =
new Timestamp {
override val createTime: Option[Long] = None
override val logAppendTime: Option[Long] = None
override val unknownTime: Option[Long] = None
override val isEmpty: Boolean = true
override def toString: String = "Timestamp()"
}
implicit val timestampShow: Show[Timestamp] =
Show.fromToString
implicit val timestampEq: Eq[Timestamp] =
Eq.instance { case (l, r) =>
l.createTime === r.createTime &&
l.logAppendTime === r.logAppendTime &&
l.unknownTime === r.unknownTime &&
l.isEmpty === r.isEmpty
}
}