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trait Cache extends AnyRef

A Cache maintains an internal state with a mapping from requests to Promises that will contain the result of those requests when they are executed. This is used internally by the library to provide deduplication and caching of requests.

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Abstract Value Members

  1. abstract def get[E, A](request: Request[E, A])(implicit trace: Trace): IO[Unit, Promise[E, A]]

    Looks up a request in the cache, failing with the unit value if the request is not in the cache or succeeding with a Promise if the request is in the cache that will contain the result of the request when it is executed.

  2. abstract def lookup[E, A, B](request: A)(implicit ev: <:<[A, Request[E, B]], trace: Trace): UIO[Either[Promise[E, B], Promise[E, B]]]

    Looks up a request in the cache.

    Looks up a request in the cache. If the request is not in the cache returns a Left with a Promise that can be completed to complete the request. If the request is in the cache returns a Right with a Promise that will contain the result of the request when it is executed.

  3. abstract def put[E, A](request: Request[E, A], result: Promise[E, A])(implicit trace: Trace): UIO[Unit]

    Inserts a request and a Promise that will contain the result of the request when it is executed into the cache.

  4. abstract def remove[E, A](request: Request[E, A])(implicit trace: Trace): UIO[Unit]

    Removes a request from the cache.

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    (Since version 9)

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