org.kchine.rpf.reg.ServantProxyPoolSingletonReg.java Source code

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Here is the source code for org.kchine.rpf.reg.ServantProxyPoolSingletonReg.java

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/*
 * Biocep: R-based Platform for Computational e-Science.
 *  
 * Copyright (C) 2007-2009 Karim Chine - karim.chine@m4x.org
 *  
 * Copyright (C) 2007 EMBL-EBI-Microarray Informatics
 *  
 * 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.kchine.rpf.reg;

import java.util.Hashtable;

import org.apache.commons.logging.Log;
import org.apache.commons.pool.impl.GenericObjectPool;
import org.kchine.rpf.reg.ServantsProxyFactoryReg;

/**
 * @author Karim Chine karim.chine@m4x.org
 */
public class ServantProxyPoolSingletonReg {
    static java.util.Hashtable<String, GenericObjectPool> _pool = new Hashtable<String, GenericObjectPool>();

    static Integer lock = new Integer(0);

    private static final Log log = org.apache.commons.logging.LogFactory.getLog(ServantProxyPoolSingletonReg.class);

    public static GenericObjectPool getInstance(String registryHost, int registryPort, String poolNamingPrefix) {

        String key = registryHost + '/' + registryPort + '/' + poolNamingPrefix;
        if (_pool.get(key) != null)
            return _pool.get(key);

        synchronized (lock) {

            if (_pool.get(key) == null) {
                GenericObjectPool p = new GenericObjectPool(
                        new ServantsProxyFactoryReg(registryHost, registryPort, poolNamingPrefix));
                _pool.put(key, p);
                p.setTestOnBorrow(true);
                p.setTestOnReturn(true);
            }
            return _pool.get(key);
        }
    }
}