zio.test.ConcurrentHashMap.scala Maven / Gradle / Ivy
/*
* Copyright 2019-2024 John A. De Goes and the ZIO Contributors
*
* 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 zio.test
import zio.stacktracer.TracingImplicits.disableAutoTrace
import java.util.concurrent.{ConcurrentHashMap => JConcurrentHashMap}
private[test] final case class ConcurrentHashMap[K, V] private (private val map: JConcurrentHashMap[K, V]) {
def foldLeft[B](z: B)(op: (B, (K, V)) => B): B = {
var result = z
val it = map.entrySet.iterator
while (it.hasNext) {
val e = it.next()
result = op(result, (e.getKey, e.getValue))
}
result
}
def getOrElseUpdate(key: K, op: => V): V =
map.computeIfAbsent(key, _ => op)
}
private[test] object ConcurrentHashMap {
def empty[K, V]: ConcurrentHashMap[K, V] =
new ConcurrentHashMap[K, V](new JConcurrentHashMap[K, V]())
}