/**
 * Copyright (C) 2012-2013 Selventa, Inc.
 *
 * This file is part of the OpenBEL Framework.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * The OpenBEL Framework 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 Lesser General Public
 * License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with the OpenBEL Framework. If not, see <http://www.gnu.org/licenses/>.
 *
 * Additional Terms under LGPL v3:
 *
 * This license does not authorize you and you are prohibited from using the
 * name, trademarks, service marks, logos or similar indicia of Selventa, Inc.,
 * or, in the discretion of other licensors or authors of the program, the
 * name, trademarks, service marks, logos or similar indicia of such authors or
 * licensors, in any marketing or advertising materials relating to your
 * distribution of the program or any covered product. This restriction does
 * not waive or limit your obligation to keep intact all copyright notices set
 * forth in the program as delivered to you.
 *
 * If you distribute the program in whole or in part, or any modified version
 * of the program, and you assume contractual liability to the recipient with
 * respect to the program or modified version, then you will indemnify the
 * authors and licensors of the program for any liabilities that these
 * contractual assumptions directly impose on those licensors and authors.
 */
package org.openbel.framework.api;

import static java.lang.System.currentTimeMillis;
import static java.lang.Thread.sleep;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;

import org.junit.Test;
import org.openbel.framework.api.internal.KamDbObject;
import org.openbel.framework.api.internal.KAMCatalogDao.KamFilter;
import org.openbel.framework.api.internal.KAMCatalogDao.KamInfo;

/**
 * {@link DefaultKamCacheService} test cases.
 */
public class DefaultKamCacheServiceTest {

    /**
     * Test cache mechanisms.
     */
    @Test
    public void test() {
        KamCacheService kcSvc = new DefaultKamCacheService(new MockKAMStore1());
        KamDbObject kdbobj = new KamDbObject(1, null, null, null, null);
        KamInfo ki = new KamInfo(kdbobj);
        long t1 = currentTimeMillis();
        try {
            kcSvc.loadKam(ki, null);
        } catch (KamCacheServiceException e) {
            e.printStackTrace();
            fail("unexpected exception");
        }
        long t2 = currentTimeMillis();

        // CACHE MISS ASSERTION
        String msg = "expected load of KAM to take more than 5 seconds";
        assertTrue(msg, (t2 - t1) >= (MockKAMStore1.KAM_LOAD_TIME * 1000));

        String handle = null;
        try {
            handle = kcSvc.loadKam(ki, null);
        } catch (KamCacheServiceException e) {
            e.printStackTrace();
            fail("unexpected exception");
        }
        long t3 = currentTimeMillis();

        // CACHE HIT ASSERTION
        msg = "expected load of KAM to take less than 5 seconds";
        assertTrue(msg, (t3 - t2) < (MockKAMStore1.KAM_LOAD_TIME * 1000));

        kcSvc.releaseKam(handle);

        long t4 = currentTimeMillis();
        try {
            kcSvc.loadKam(ki, null);
        } catch (KamCacheServiceException e) {
            e.printStackTrace();
            fail("unexpected exception");
        }
        long t5 = currentTimeMillis();

        // CACHE MISS ASSERTION
        msg = "expected second load of KAM to take more than 5 seconds";
        assertTrue(msg, (t5 - t4) >= (MockKAMStore1.KAM_LOAD_TIME * 1000));
    }

    static class MockKAMStore1 extends MockKamStore {
        // Time to load "KAM" 5
        static final int KAM_LOAD_TIME = 5;

        @Override
        public Kam getKam(KamInfo info, KamFilter fltr)
                throws KAMStoreException {
            try {
                sleep(KAM_LOAD_TIME * 1000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            return null;
        }

        @Override
        public Kam getKam(KamInfo info) throws KAMStoreException {
            try {
                sleep(KAM_LOAD_TIME * 1000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            return null;
        }
    }
}