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/*
* The MIT License (MIT)
*
* Copyright (c) 2017-2022 Yegor Bugayenko
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
package org.jpeek.web;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.Future;
import org.cactoos.BiFunc;
import org.cactoos.Func;
import org.takes.Response;
/**
* Futures for {@link AsyncReports}.
*
* There is no thread-safety guarantee.
*
* @since 0.8
* @checkstyle ClassDataAbstractionCouplingCheck (500 lines)
*/
final class StickyFutures
implements BiFunc>> {
/**
* Original func.
*/
private final BiFunc>> origin;
/**
* Cache.
*/
private final Map>> cache;
/**
* Max size.
*/
private final int max;
/**
* Ctor.
* @param func Original bi-function
* @param size Max size of cache before full clean up
*/
StickyFutures(final BiFunc>> func, final int size) {
this.origin = func;
this.cache = new ConcurrentHashMap<>(0);
this.max = size;
}
@Override
public Future> apply(
final String group, final String artifact)
throws Exception {
synchronized (this.cache) {
if (this.cache.size() > this.max) {
this.cache.clear();
}
final String target = String.format("%s:%s", group, artifact);
if (!this.cache.containsKey(target)
|| this.cache.get(target).isCancelled()) {
this.cache.put(target, this.origin.apply(group, artifact));
}
return this.cache.get(target);
}
}
}