/
MaxActiveRequests.scala
119 lines (106 loc) · 4.14 KB
/
MaxActiveRequests.scala
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/*
* Copyright 2014 http4s.org
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.http4s.server.middleware
import cats.syntax.all._
import cats.data._
import cats.effect._
import org.http4s._
object MaxActiveRequests {
// TODO (ce3-ra): Sync + MonadCancel
@deprecated(message = "Please use forHttpApp instead.", since = "0.21.14")
def httpApp[F[_]: Async](
maxActive: Long,
defaultResp: Response[F] = Response[F](status = Status.ServiceUnavailable)
): F[Kleisli[F, Request[F], Response[F]] => Kleisli[F, Request[F], Response[F]]] =
forHttpApp[F](maxActive, defaultResp)
@deprecated(message = "Please use forHttpApp2 instead.", since = "0.21.14")
def inHttpApp[G[_], F[_]](
maxActive: Long,
defaultResp: Response[F] = Response[F](status = Status.ServiceUnavailable)
)(implicit
F: Async[F],
G: Sync[G]): G[Kleisli[F, Request[F], Response[F]] => Kleisli[F, Request[F], Response[F]]] =
forHttpApp2[G, F](maxActive, defaultResp)
def forHttpApp[F[_]: Async](
maxActive: Long,
defaultResp: Response[F] = Response[F](status = Status.ServiceUnavailable)
): F[Kleisli[F, Request[F], Response[F]] => Kleisli[F, Request[F], Response[F]]] =
forHttpApp2[F, F](maxActive, defaultResp)
def forHttpApp2[G[_], F[_]](
maxActive: Long,
defaultResp: Response[F] = Response[F](status = Status.ServiceUnavailable)
)(implicit
F: Async[F],
G: Sync[G]): G[Kleisli[F, Request[F], Response[F]] => Kleisli[F, Request[F], Response[F]]] =
ConcurrentRequests
.app2[G, F](
Function.const(F.unit),
Function.const(F.unit)
)
.map(middleware =>
(httpApp =>
middleware(Kleisli {
case ContextRequest(concurrent, _) if concurrent > maxActive =>
defaultResp.pure[F]
case ContextRequest(_, req) =>
httpApp(req)
})))
@deprecated(message = "Please use forHttpRoutes instead.", since = "0.21.14")
def httpRoutes[F[_]: Async](
maxActive: Long,
defaultResp: Response[F] = Response[F](status = Status.ServiceUnavailable)
): F[Kleisli[OptionT[F, *], Request[F], Response[F]] => Kleisli[
OptionT[F, *],
Request[F],
Response[F]]] = forHttpRoutes[F](maxActive, defaultResp)
@deprecated(message = "Please use forHttpRoutes2 instead.", since = "0.21.14")
def inHttpRoutes[G[_], F[_]](
maxActive: Long,
defaultResp: Response[F] = Response[F](status = Status.ServiceUnavailable)
)(implicit F: Async[F], G: Sync[G]): G[Kleisli[OptionT[F, *], Request[F], Response[F]] => Kleisli[
OptionT[F, *],
Request[F],
Response[F]]] =
forHttpRoutes2[G, F](maxActive, defaultResp)
def forHttpRoutes[F[_]: Async](
maxActive: Long,
defaultResp: Response[F] = Response[F](status = Status.ServiceUnavailable)
): F[Kleisli[OptionT[F, *], Request[F], Response[F]] => Kleisli[
OptionT[F, *],
Request[F],
Response[F]]] =
forHttpRoutes2[F, F](maxActive, defaultResp)
def forHttpRoutes2[G[_], F[_]](
maxActive: Long,
defaultResp: Response[F] = Response[F](status = Status.ServiceUnavailable)
)(implicit F: Async[F], G: Sync[G]): G[Kleisli[OptionT[F, *], Request[F], Response[F]] => Kleisli[
OptionT[F, *],
Request[F],
Response[F]]] =
ConcurrentRequests
.route2[G, F](
Function.const(F.unit),
Function.const(F.unit)
)
.map(middleware =>
(httpRoutes =>
middleware(Kleisli {
case ContextRequest(concurrent, _) if concurrent > maxActive =>
defaultResp.pure[OptionT[F, *]]
case ContextRequest(_, req) =>
httpRoutes(req)
})))
}