configurabledatasource.java

基于struts框架的web开发应用实例

/*
 * Created on Mar 19, 2004
 *
 * To change the template for this generated file go to
 * Window>Preferences>Java>Code Generation>Code and Comments
 */
package com.hp.mw.samples.struts.storefront.datasources;

import java.io.InputStream;
import java.util.Properties;

import org.apache.commons.dbcp.BasicDataSource;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import com.hp.mw.samples.struts.storefront.utils.StringUtils;
/**
 * @author zcollier
 *
 * To change the template for this generated type comment go to
 * Window>Preferences>Java>Code Generation>Code and Comments
 */
public class ConfigurableDataSource extends BasicDataSource {
	
	public static ConfigurableDataSource sInstance;
	private static Log logger = LogFactory.getLog(ConfigurableDataSource.class);
	
	private static String PROPERTIES_RESOURCE = "sonic.properties";	
	private Properties sonicProperties;
	
	public ConfigurableDataSource()
	{
		try {
			logger.debug("Initializing configurable data source");
			sInstance=this;
			ClassLoader classLoader = getClass().getClassLoader();
			InputStream is = classLoader.getResourceAsStream(PROPERTIES_RESOURCE);
			sonicProperties = new Properties(System.getProperties());
			sonicProperties.load(is);	
		}
		catch (Exception e) {
			e.printStackTrace();
		}
	}
	
	/* (non-Javadoc)
	 * @see org.apache.commons.dbcp.BasicDataSource#setDriverClassName(java.lang.String)
	 */
	public void setDriverClassName(String arg0) {
		super.setDriverClassName(StringUtils.resolveProperties(sonicProperties, arg0));
		logger.debug("Database driver class is " + getDriverClassName());
	}

	/* (non-Javadoc)
	 * @see org.apache.commons.dbcp.BasicDataSourc#setUrl(java.lang.String)
	 */
	public void setUrl(String arg0) {
		super.setUrl(StringUtils.resolveProperties(sonicProperties, arg0));
		logger.debug("Database url is " + getUrl());
	}

	/* (non-Javadoc)
	 * @see org.apache.commons.dbcp.BasicDataSource#setUsername(java.lang.String)
	 */
	public void setUsername(String arg0) {
		super.setUsername(StringUtils.resolveProperties(sonicProperties, arg0));
		logger.debug("Database username is " + getUsername());
	}
	
	/* (non-Javadoc)
	 * @see org.apache.commons.dbcp.BasicDataSourc#setPassword(java.lang.String)
	 */
	public void setPassword(String arg0) {
		super.setPassword(StringUtils.resolveProperties(sonicProperties, arg0));
		logger.debug("Database password is " + getPassword());
	}


}