org.geosdi.geoplatform.jaxb.pool.factory.GPJAXBContextCachePoolFactory.java Source code

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Here is the source code for org.geosdi.geoplatform.jaxb.pool.factory.GPJAXBContextCachePoolFactory.java

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/**
 *
 *    geo-platform
 *    Rich webgis framework
 *    http://geo-platform.org
 *   ====================================================================
 *
 *   Copyright (C) 2008-2019 geoSDI Group (CNR IMAA - Potenza - ITALY).
 *
 *   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/
 *
 *   ====================================================================
 *
 *   Linking this library statically or dynamically with other modules is
 *   making a combined work based on this library. Thus, the terms and
 *   conditions of the GNU General Public License cover the whole combination.
 *
 *   As a special exception, the copyright holders of this library give you permission
 *   to link this library with independent modules to produce an executable, regardless
 *   of the license terms of these independent modules, and to copy and distribute
 *   the resulting executable under terms of your choice, provided that you also meet,
 *   for each linked independent module, the terms and conditions of the license of
 *   that module. An independent module is a module which is not derived from or
 *   based on this library. If you modify this library, you may extend this exception
 *   to your version of the library, but you are not obligated to do so. If you do not
 *   wish to do so, delete this exception statement from your version.
 */
package org.geosdi.geoplatform.jaxb.pool.factory;

import com.google.common.base.Preconditions;
import org.apache.commons.pool2.BaseKeyedPooledObjectFactory;
import org.apache.commons.pool2.PooledObject;
import org.apache.commons.pool2.impl.DefaultPooledObject;

import javax.xml.bind.JAXBContext;

/**
 * @author Giuseppe La Scaleia - CNR IMAA geoSDI Group
 * @email giuseppe.lascaleia@geosdi.org
 */
public class GPJAXBContextCachePoolFactory
        extends BaseKeyedPooledObjectFactory<GPJAXBContextCachePool, JAXBContext> {

    /**
     * Create an instance that can be served by the pool.
     *
     * @param key the key used when constructing the object
     * @return an instance that can be served by the pool
     * @throws Exception if there is a problem creating a new instance,
     *                   this will be propagated to the code requesting an object.
     */
    @Override
    public JAXBContext create(GPJAXBContextCachePool key) throws Exception {
        Preconditions.checkNotNull(key, "The GPJAXBContextCache must not be null.");
        return key.getContext();
    }

    /**
     * Wrap the provided instance with an implementation of
     * {@link PooledObject}.
     *
     * @param value the instance to wrap
     * @return The provided instance, wrapped by a {@link PooledObject}
     */
    @Override
    public PooledObject<JAXBContext> wrap(JAXBContext value) {
        return new DefaultPooledObject<>(value);
    }

    /**
     * Destroy an instance no longer needed by the pool.
     * <p>
     * The default implementation is a no-op.
     *
     * @param key the key used when selecting the instance
     * @param p   a {@code PooledObject} wrapping the the instance to be destroyed
     */
    @Override
    public void destroyObject(GPJAXBContextCachePool key, PooledObject<JAXBContext> p) throws Exception {
        key.dispose();
    }
}