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cache that handles its own updates
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| case class BlerfCache( | |
| blerfs: Ref[IO, Map[Id, Blerf]], | |
| private val getBlerfMap: IO[Map[Id, Blerf]], | |
| ) extends Logging { | |
| def updateBlerfs: IO[Unit] = getBlerfMap.flatMap(b => blerfs.set(b)) | |
| def refreshCache: IO[Unit] = | |
| Stream | |
| .repeatEval(logger.debug("refreshing blerf...") *> updateBlerfs) | |
| .metered(5.minutes) | |
| .compile | |
| .drain | |
| } | |
| object BlerfCache { | |
| def getBlerfMap(client: Client[IO]): IO[Map[Id, Blerf]] = | |
| client | |
| .expect[BlerfResp]("www.blerf.ca/fake/endpoint") | |
| .flatMap(br => br.toBlerfMap) | |
| def build(client: Client[IO]): Resource[IO, BlerfCache] = { | |
| val blerf: IO[BlerfCache] = Ref.ofEffect(getBlerfMap(client)).map(BlerfCache(_, getBlerfMap(client))) | |
| val updatingBlerf = Resource.eval(blerf).flatMap(b => b.refreshCache.background.map(_ => b)) | |
| updatingBlerf | |
| } | |
| } |
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