com.davidbracewell.cache.impl.GuavaCache.java Source code

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Here is the source code for com.davidbracewell.cache.impl.GuavaCache.java

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/*
 * (c) 2005 David B. Bracewell
 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.davidbracewell.cache.impl;

import com.davidbracewell.cache.CacheSpec;
import com.google.common.base.Preconditions;
import com.google.common.cache.Cache;
import com.google.common.cache.CacheBuilder;

/**
 * Wraps a Guava Cache
 *
 * @author David B. Bracewell
 */
public class GuavaCache<K, V> extends com.davidbracewell.cache.Cache<K, V> {

    private final Cache<K, V> cache;

    /**
     * Default Constructor
     *
     * @param specification The cache specification
     */
    public GuavaCache(CacheSpec<K, V> specification) {
        super(Preconditions.checkNotNull(specification));
        CacheBuilder<K, V> cacheBuilder = GuavaCacheUtils.cacheBuilderFromSpec(specification);
        if (specification.getRemovalListener() == null) {
            this.cache = cacheBuilder.build();
        } else {
            this.cache = cacheBuilder.removalListener(specification.getRemovalListener()).build();
        }
    }

    @Override
    public boolean containsKey(K key) {
        return cache.asMap().containsKey(key);
    }

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

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

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

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

    @Override
    public void invalidateAll(Iterable<? extends K> keys) {
        cache.invalidateAll(keys);
    }

    @Override
    public void invalidate(K key) {
        cache.invalidate(key);
    }

    @Override
    public void close() throws Exception {
        cache.cleanUp();
    }

}//END OF GuavaCache