com.evolutiongaming.kafka.journal.conversions.HeaderToTuple.scala Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of kafka-journal_2.13 Show documentation

kafka-journal

The newest version!

package com.evolutiongaming.kafka.journal.conversions

import cats.syntax.all._
import com.evolutiongaming.catshelper.ApplicativeThrowable
import com.evolutiongaming.kafka.journal.{FromBytes, JournalError}
import com.evolutiongaming.skafka.Header
import scodec.bits.ByteVector

trait HeaderToTuple[F[_]] {

  def apply(header: Header): F[(String, String)]
}

object HeaderToTuple {

  implicit def apply[F[_] : ApplicativeThrowable](implicit
    stringFromBytes: FromBytes[F, String],
  ): HeaderToTuple[F] = {
    header: Header => {
      val bytes = ByteVector.view(header.value)
      stringFromBytes(bytes)
        .map { value => (header.key, value) }
        .adaptErr { case e => JournalError(s"HeaderToTuple failed for $header: $e", e) }
    }
  }
}