org.guzz.connection.DBCPDataSourceProvider.java Source code

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Here is the source code for org.guzz.connection.DBCPDataSourceProvider.java

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/*
 * Copyright 2008-2009 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
package org.guzz.connection;

import java.sql.Connection;
import java.sql.SQLException;
import java.util.Enumeration;
import java.util.Properties;

import javax.sql.DataSource;

import org.apache.commons.dbcp.BasicDataSource;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.guzz.util.CloseUtil;
import org.guzz.util.javabean.BeanWrapper;
import org.guzz.util.javabean.JavaBeanWrapper;

/**
 * 
 * Apache commons dbcp datasource provider.
 * 
 * <br>Configuration details: 
 * <a target="_blank" href="http://commons.apache.org/dbcp/configuration.html">http://commons.apache.org/dbcp/configuration.html</a>
 *
 *
 * @author liukaixuan(liukaixuan@gmail.com)
 */
public class DBCPDataSourceProvider implements DataSourceProvider {
    private static transient final Log log = LogFactory.getLog(DBCPDataSourceProvider.class);
    BasicDataSource dataSource = null;

    public void configure(Properties props, int maxLoad) {
        if (dataSource == null) {
            dataSource = new BasicDataSource();
        }

        JavaBeanWrapper bw = BeanWrapper.createPOJOWrapper(dataSource.getClass());
        Enumeration e = props.keys();
        while (e.hasMoreElements()) {
            String key = (String) e.nextElement();
            String value = props.getProperty(key);

            try {
                bw.setValueAutoConvert(dataSource, key, value);
            } catch (Exception e1) {
                log.error("unkown property:[" + key + "=" + value + "]", e1);
            }
        }

        //?500
        if (maxLoad > 1000 || maxLoad < 1) {
            maxLoad = 500;
        }

        dataSource.setMaxActive(maxLoad);

        //fetch a connection to force the datasource building the pool
        Connection c = null;
        try {
            c = dataSource.getConnection();
        } catch (SQLException e1) {
            log.error(props, e1);
        } finally {
            CloseUtil.close(c);
        }
    }

    public DataSource getDataSource() {
        return dataSource;
    }

    public void shutdown() {
        if (dataSource != null) {
            try {
                dataSource.close();
            } catch (SQLException e) {
                log.error("fail to shutdown the DBCPDataSource", e);
            }

            dataSource = null;
        }
    }

}