56 lines
1.7 KiB
Java
56 lines
1.7 KiB
Java
/*
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* This file is part of Player Analytics (Plan).
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*
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* Plan is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License v3 as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Plan is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with Plan. If not, see <https://www.gnu.org/licenses/>.
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*/
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package com.djrapitops.plan.delivery.domain.container;
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import java.util.concurrent.TimeUnit;
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import java.util.function.Supplier;
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/**
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* Caching layer between Supplier and caller.
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* <p>
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* Refreshes the value if 30 seconds have passed since the last call.
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*
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* @author Rsl1122
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*/
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public class CachingSupplier<T> implements Supplier<T> {
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private final Supplier<T> original;
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private T cachedValue;
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private long cacheTime;
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private final long timeToLive;
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public CachingSupplier(Supplier<T> original) {
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this(original, TimeUnit.SECONDS.toMillis(30L));
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}
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public CachingSupplier(Supplier<T> original, long timeToLive) {
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this.original = original;
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this.timeToLive = timeToLive;
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cacheTime = 0L;
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}
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@Override
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public T get() {
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if (cachedValue == null || System.currentTimeMillis() - cacheTime > timeToLive) {
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cachedValue = original.get();
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cacheTime = System.currentTimeMillis();
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}
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return cachedValue;
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}
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} |