com.github.pagehelper.cache.GuavaCache.java Source code

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Here is the source code for com.github.pagehelper.cache.GuavaCache.java

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/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2014-2017 abel533@gmail.com
 *
 * 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 NONINFRINGEMENT. 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 com.github.pagehelper.cache;

import com.github.pagehelper.util.StringUtil;
import com.google.common.cache.CacheBuilder;

import java.util.Properties;
import java.util.concurrent.TimeUnit;

/**
 * Simple Guava Cache
 *
 * @author liuzh
 */
public class GuavaCache<K, V> implements Cache<K, V> {

    private final com.google.common.cache.Cache<K, V> CACHE;

    public GuavaCache(Properties properties, String prefix) {
        CacheBuilder cacheBuilder = CacheBuilder.newBuilder();
        String maximumSize = properties.getProperty(prefix + ".maximumSize");
        if (StringUtil.isNotEmpty(maximumSize)) {
            cacheBuilder.maximumSize(Long.parseLong(maximumSize));
        } else {
            cacheBuilder.maximumSize(1000);
        }
        String expireAfterAccess = properties.getProperty(prefix + ".expireAfterAccess");
        if (StringUtil.isNotEmpty(expireAfterAccess)) {
            cacheBuilder.expireAfterAccess(Long.parseLong(expireAfterAccess), TimeUnit.MILLISECONDS);
        }
        String expireAfterWrite = properties.getProperty(prefix + ".expireAfterWrite");
        if (StringUtil.isNotEmpty(expireAfterWrite)) {
            cacheBuilder.expireAfterWrite(Long.parseLong(expireAfterWrite), TimeUnit.MILLISECONDS);
        }
        String initialCapacity = properties.getProperty(prefix + ".initialCapacity");
        if (StringUtil.isNotEmpty(initialCapacity)) {
            cacheBuilder.initialCapacity(Integer.parseInt(initialCapacity));
        }
        CACHE = cacheBuilder.build();
    }

    @Override
    public V get(K key) {
        return CACHE.getIfPresent(key);
    }

    @Override
    public void put(K key, V value) {
        CACHE.put(key, value);
    }
}