io.gatling.http.resolver.InflightInetAddressNameResolver.scala Maven / Gradle / Ivy
/*
* Copyright 2011-2024 GatlingCorp (https://gatling.io)
*
* 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 io.gatling.http.resolver
import java.{ util => ju }
import java.net.InetAddress
import java.util.concurrent.ConcurrentHashMap
import io.gatling.http.client.HttpListener
import io.gatling.http.client.resolver.InetAddressNameResolver
import io.netty.util.concurrent.{ Future, Promise }
final class InflightInetAddressNameResolver(wrapped: InetAddressNameResolver, inProgressResolutions: ConcurrentHashMap[String, Promise[ju.List[InetAddress]]])
extends InetAddressNameResolver {
override def resolveAll(inetHost: String, promise: Promise[ju.List[InetAddress]], listener: HttpListener): Future[ju.List[InetAddress]] = {
val earlyPromise = inProgressResolutions.putIfAbsent(inetHost, promise)
if (earlyPromise != null) {
// name resolution for the specified inetHost is already in progress
if (earlyPromise.isDone) {
transferResult(earlyPromise, promise)
} else {
earlyPromise.addListener(transferResult(_, promise))
}
} else {
try {
wrapped.resolveAll(inetHost, promise, listener)
} finally {
if (promise.isDone) {
inProgressResolutions.remove(inetHost)
} else {
promise.addListener((_: Future[ju.List[InetAddress]]) => inProgressResolutions.remove(inetHost))
}
}
}
promise
}
private def transferResult(src: Future[ju.List[InetAddress]], dst: Promise[ju.List[InetAddress]]): Unit =
if (src.isSuccess) {
dst.trySuccess(src.getNow)
} else {
dst.tryFailure(src.cause)
}
// noop as shared
override def close(): Unit = {}
}