fetch

Type Members

1. final case class Ap[A, B](ff: Query[(A) ⇒ B], fa: Query[A]) extends Query[B] with Product with Serializable

2. final case class Async[A](action: ((A) ⇒ Unit, (Throwable) ⇒ Unit) ⇒ Unit, timeout: Duration) extends Query[A] with Product with Serializable

   A query that can only be satisfied asynchronously.

3. final case class Concurrent(queries: NonEmptyList[FetchQuery[Any, Any]]) extends FetchOp[InMemoryCache] with FetchRequest with Product with Serializable

4. trait DataSource[I, A] extends AnyRef

   A DataSource is the recipe for fetching a certain identity I, which yields results of type A.

5. trait DataSourceCache extends AnyRef

   A Cache trait so the users of the library can provide their own cache.

6. type DataSourceIdentity = (DataSourceName, Any)

7. type DataSourceName = String

8. trait Env extends AnyRef

   An environment that is passed along during the fetch rounds.

9. sealed trait ExecutionType extends Product with Serializable

10. type Fetch[A] = Free[FetchOp, A]

11. case class FetchEnv(cache: DataSourceCache, rounds: Queue[Round] = ...) extends Env with Product with Serializable

    A concrete implementation of Env used in the default Fetch interpreter.

12. trait FetchException extends Throwable with Product with Serializable

13. type FetchInterpreter[M[_]] = AnyRef { type f[x] = cats.data.StateT[M,fetch.FetchEnv,x] }

14. trait FetchInterpreters extends AnyRef

15. final case class FetchMany[I, A](ids: NonEmptyList[I], ds: DataSource[I, A]) extends FetchOp[List[A]] with FetchQuery[I, A] with Product with Serializable

16. trait FetchMonadError[M[_]] extends MonadError[M, FetchException]

17. final case class FetchOne[I, A](id: I, ds: DataSource[I, A]) extends FetchOp[A] with FetchQuery[I, A] with Product with Serializable

18. sealed abstract class FetchOp[A] extends Product with Serializable

    Primitive operations in the Fetch Free monad.

19. sealed trait FetchQuery[I, A] extends FetchRequest

20. sealed trait FetchRequest extends Product with Serializable

    Requests in Fetch Free monad.

21. case class InMemoryCache(state: Map[(DataSourceName, Any), Any]) extends DataSourceCache with Product with Serializable

    A cache that stores its elements in memory.

22. final case class Join[A, B](fl: Fetch[A], fr: Fetch[B]) extends FetchOp[(A, B)] with Product with Serializable

23. case class MissingIdentities(env: Env, missing: Map[DataSourceName, List[Any]]) extends Throwable with FetchException with Product with Serializable

24. case class NotFound(env: Env, request: FetchOne[_, _]) extends Throwable with FetchException with Product with Serializable

25. sealed trait Query[A] extends Product with Serializable

26. case class Round(cache: DataSourceCache, request: FetchRequest, response: Any, start: Long, end: Long) extends Product with Serializable

    A data structure that holds information about a fetch round.

27. final case class Sync[A](action: Eval[A]) extends Query[A] with Product with Serializable

    A query that can be satisfied synchronously.

28. final case class Thrown[A](err: Throwable) extends FetchOp[A] with Product with Serializable

29. case class UnhandledException(env: Env, err: Throwable) extends Throwable with FetchException with Product with Serializable