org.jlgranda.fede.cache.SubjectCacheProvider.java Source code

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Here is the source code for org.jlgranda.fede.cache.SubjectCacheProvider.java

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/*
 * Copyright (C) 2018 jlgranda
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.jlgranda.fede.cache;

/**
 *
 * @author jlgranda
 */

import com.google.common.cache.CacheBuilder;
import com.google.common.cache.CacheLoader;
import com.google.common.cache.LoadingCache;
import com.jlgranda.fede.ejb.SubjectService;
import java.io.Serializable;
import java.util.concurrent.TimeUnit;
import javax.ejb.EJB;
import javax.ejb.Singleton;
import org.jpapi.model.profile.Subject;

@Singleton
public class SubjectCacheProvider implements Serializable {

    private static final long serialVersionUID = -5160962182428837094L;

    private LoadingCache<Long, Subject> subjectCache;

    @EJB
    SubjectService subjectService;

    public SubjectCacheProvider() {

        subjectCache = CacheBuilder.newBuilder().maximumSize(100).expireAfterWrite(5, TimeUnit.MINUTES)
                .build(new CacheLoader<Long, Subject>() {
                    @Override
                    public Subject load(Long id) throws Exception {
                        return subjectService.find(id);
                    }
                });
    }

    public LoadingCache<Long, Subject> getSubjectCache() {
        return subjectCache;
    }
}