net.sf.hajdbc.pool.generic.GenericObjectPoolFactory.java Source code

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Here is the source code for net.sf.hajdbc.pool.generic.GenericObjectPoolFactory.java

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/*
 * HA-JDBC: High-Availability JDBC
 * Copyright (C) 2012  Paul Ferraro
 *
 * 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.
 *
 * 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package net.sf.hajdbc.pool.generic;

import java.util.NoSuchElementException;

import net.sf.hajdbc.logging.Level;
import net.sf.hajdbc.logging.Logger;
import net.sf.hajdbc.logging.LoggerFactory;
import net.sf.hajdbc.pool.Pool;
import net.sf.hajdbc.pool.PoolFactory;
import net.sf.hajdbc.pool.PoolProvider;

import org.apache.commons.pool.ObjectPool;
import org.apache.commons.pool.PoolableObjectFactory;
import org.apache.commons.pool.impl.GenericObjectPool;

/**
 * Adapter for a <a href="http://commons.apache.org/pool">commons-pool</a> GenericObjectPool.
 * 
 * @author Paul Ferraro
 */
public class GenericObjectPoolFactory implements PoolFactory {
    static final Logger logger = LoggerFactory.getLogger(GenericObjectPoolFactory.class);

    private final GenericObjectPoolConfiguration config;

    public GenericObjectPoolFactory(GenericObjectPoolConfiguration config) {
        this.config = config;
    }

    @Override
    public <T, E extends Exception> Pool<T, E> createPool(final PoolProvider<T, E> provider) {
        PoolableObjectFactory<T> factory = new PoolableObjectFactory<T>() {
            @Override
            public void destroyObject(T object) {
                provider.close(object);
            }

            @Override
            public T makeObject() throws Exception {
                return provider.create();
            }

            @Override
            public boolean validateObject(T object) {
                return provider.isValid(object);
            }

            @Override
            public void activateObject(T object) {
            }

            @Override
            public void passivateObject(T object) {
            }
        };

        final ObjectPool<T> pool = new GenericObjectPool<T>(factory, this.config);

        return new Pool<T, E>() {
            @Override
            public void close() {
                try {
                    pool.close();
                } catch (Exception e) {
                    logger.log(Level.WARN, e, e.getMessage());
                }
            }

            @Override
            public void release(T item) {
                try {
                    pool.returnObject(item);
                } catch (Exception e) {
                    logger.log(Level.WARN, e, e.getMessage());
                }
            }

            @Override
            public T take() throws E {
                try {
                    return pool.borrowObject();
                } catch (NoSuchElementException e) {
                    return provider.create();
                } catch (IllegalStateException e) {
                    throw e;
                } catch (Exception e) {
                    throw provider.getExceptionClass().cast(e);
                }
            }
        };
    }
}