mirror of
https://github.com/proxiodev/RedisBungee.git
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8b5eacec40
The most notable changes are a refactor of DataManager to make the caching system easier to tweak, and the ability to use Lua scripts that run on the Redis server to optimize certain batch operations (currently, only getServersToPlayers() uses this). This also paves the way for me to deprecate old versions of Redis. Anything older than 2.6 is ancient, and even 2.6 is ancient, so it ends up being a net overall benefit.
65 lines
2.2 KiB
Java
65 lines
2.2 KiB
Java
/**
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* This is free and unencumbered software released into the public domain.
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*
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* Anyone is free to copy, modify, publish, use, compile, sell, or
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* distribute this software, either in source code form or as a compiled
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* binary, for any purpose, commercial or non-commercial, and by any
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* means.
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*
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* In jurisdictions that recognize copyright laws, the author or authors
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* of this software dedicate any and all copyright interest in the
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* software to the public domain. We make this dedication for the benefit
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* of the public at large and to the detriment of our heirs and
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* successors. We intend this dedication to be an overt act of
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* relinquishment in perpetuity of all present and future rights to this
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* software under copyright law.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* For more information, please refer to <http://unlicense.org/>
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*/
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package com.imaginarycode.minecraft.redisbungee.util;
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import java.util.concurrent.Callable;
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import java.util.concurrent.ConcurrentHashMap;
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import java.util.concurrent.ConcurrentMap;
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import java.util.concurrent.ExecutionException;
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// I would use the Guava, but can't because I need a few more properties.
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public class InternalCache<K, V> {
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private final ConcurrentMap<K, V> map = new ConcurrentHashMap<>(128, 0.75f, 4);
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public V get(K key, Callable<V> loader) throws ExecutionException {
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V value = map.get(key);
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if (value == null) {
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try {
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value = loader.call();
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} catch (Exception e) {
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throw new ExecutionException(e);
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}
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if (value == null)
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return null;
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map.putIfAbsent(key, value);
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}
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return value;
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}
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public V put(K key, V value) {
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return map.put(key, value);
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}
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public void invalidate(K key) {
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map.remove(key);
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}
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}
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