com.jdon.components.guavacache.GuavaCacheProvider.java Source code

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Here is the source code for com.jdon.components.guavacache.GuavaCacheProvider.java

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/*
 * Copyright 2003-2009 the original author or authors.
 * 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 com.jdon.components.guavacache;

import java.util.Collection;

import com.google.common.cache.Cache;
import com.google.common.cache.CacheBuilder;
import com.jdon.container.pico.Startable;

public class GuavaCacheProvider implements com.jdon.controller.cache.Cache, Startable {

    private Cache<Object, Object> cache;

    private final GuavaCacheConf guavaCacheConf;

    public GuavaCacheProvider(GuavaCacheConf guavaCacheConf) {
        this.guavaCacheConf = guavaCacheConf;
    }

    @Override
    public void start() {
        cache = CacheBuilder.newBuilder().maximumSize(guavaCacheConf.getMaximumSize()).build();
    }

    @Override
    public void stop() {
        cache.cleanUp();
        cache.invalidateAll();

    }

    @Override
    public Object get(Object key) {
        return cache.getIfPresent(key);
    }

    @Override
    public void put(Object key, Object value) {
        cache.put(key, value);
    }

    @Override
    public void remove(Object key) {
        cache.invalidate(key);

    }

    @Override
    public long size() {
        return cache.size();
    }

    @Override
    public void clear() {
        cache.invalidateAll();
    }

    @Override
    public boolean contain(Object key) {
        if (get(key) != null)
            return true;
        else
            return false;
    }

    @Override
    public Collection keySet() {
        return cache.asMap().keySet();
    }

    @Override
    public long getCacheHits() {
        return cache.stats().hitCount();
    }

    @Override
    public long getCacheMisses() {
        return cache.stats().missCount();
    }

}