/
DestinationAttribute.scala
42 lines (36 loc) · 1.42 KB
/
DestinationAttribute.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.client.middleware
import cats.effect._
import org.http4s._
import org.http4s.client.Client
import io.chrisdavenport.vault._
/** Client middleware that sets the destination attribute of every request to the specified value.
*/
object DestinationAttribute {
def apply[F[_]: Sync](client: Client[F], destination: String): Client[F] =
Client { req =>
client.run(req.withAttribute(Destination, destination))
}
/** The returned function can be used as classifier function when creating the [[Metrics]] middleware, to use the destination
* attribute from the request as classifier.
*
* @return the classifier function
*/
def getDestination[F[_]](): Request[F] => Option[String] = _.attributes.lookup(Destination)
val Destination = Key.newKey[IO, String].unsafeRunSync()
val EmptyDestination = ""
}