scala.coursier.cache.Cache.scala Maven / Gradle / Ivy
package coursier.cache
import coursier.util.{Artifact, EitherT}
import scala.concurrent.ExecutionContext
abstract class Cache[F[_]] extends PlatformCache[F] {
import Cache.Fetch
/** Method to fetch an [[Artifact]].
*
* Note that this method tries all the [[coursier.cache.CachePolicy]] ies of this cache
* straightaway. During resolutions, you should prefer to try all repositories for the first
* policy, then the other policies if needed (in pseudo-code, `for (policy <- policies; repo <-
* repositories) …`, rather than `for (repo <- repositories, policy <- policies) …`). You should
* use the [[fetchs]] method in that case.
*/
def fetch: Fetch[F]
/** Sequence of [[Fetch]] able to fetch an [[Artifact]].
*
* Each element correspond to a [[coursier.cache.CachePolicy]] of this [[Cache]]. You may want to
* pass each of them to `coursier.core.ResolutionProcess.fetch()`.
*
* @return
* a non empty sequence
*/
def fetchs: Seq[Fetch[F]] =
Seq(fetch)
def ec: ExecutionContext
def loggerOpt: Option[CacheLogger] =
None
}
object Cache extends PlatformCacheCompanion {
type Fetch[F[_]] = Artifact => EitherT[F, String, String]
}