org.icgc.dcc.metadata.server.config.CacheConfig.java Source code

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Here is the source code for org.icgc.dcc.metadata.server.config.CacheConfig.java

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/*
 * Copyright (c) 2014 The Ontario Institute for Cancer Research. All rights reserved.                             
 *                                                                                                               
 * This program and the accompanying materials are made available under the terms of the GNU Public License v3.0.
 * You should have received a copy of the GNU General Public License along with                                  
 * this program. If not, see <http://www.gnu.org/licenses/>.                                                     
 *                                                                                                               
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY                           
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES                          
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT                           
 * SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,                                
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED                          
 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;                               
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER                              
 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN                         
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package org.icgc.dcc.metadata.server.config;

import static java.util.concurrent.TimeUnit.MINUTES;

import java.util.concurrent.ConcurrentMap;

import org.springframework.cache.Cache;
import org.springframework.cache.CacheManager;
import org.springframework.cache.annotation.CachingConfigurerSupport;
import org.springframework.cache.annotation.EnableCaching;
import org.springframework.cache.concurrent.ConcurrentMapCache;
import org.springframework.cache.concurrent.ConcurrentMapCacheManager;
import org.springframework.cache.interceptor.KeyGenerator;
import org.springframework.cache.interceptor.SimpleKeyGenerator;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Lazy;

import com.google.common.cache.CacheBuilder;

/**
 * Server wide caching configuration.
 */
@Lazy
@Configuration
@EnableCaching
public class CacheConfig extends CachingConfigurerSupport {

    /**
     * Constants.
     */
    private static final int CACHE_TTL_MINUTES = 60;

    @Override
    public CacheManager cacheManager() {
        return new ConcurrentMapCacheManager() {

            @Override
            protected Cache createConcurrentMapCache(String name) {
                return new ConcurrentMapCache(name, createStore(), false);
            }

            /**
             * @return Guava cache instance with a suitable TTL.
             */
            private ConcurrentMap<Object, Object> createStore() {
                return CacheBuilder.newBuilder().expireAfterWrite(CACHE_TTL_MINUTES, MINUTES).maximumSize(100)
                        .build().asMap();
            }

        };
    }

    @Override
    public KeyGenerator keyGenerator() {
        return new SimpleKeyGenerator();
    }

}