ProxoolListener

package cn.com.css.common.listener;

import java.io.File;
import java.util.Enumeration;
import java.util.Properties;

import javax.servlet.ServletContext;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.logicalcobwebs.proxool.ProxoolException;
import org.logicalcobwebs.proxool.configuration.JAXPConfigurator;
import org.logicalcobwebs.proxool.configuration.PropertyConfigurator;

public class ProxoolListener implements ServletContextListener  
{  
    private static final Log LOG = LogFactory.getLog(ProxoolListener.class);  
      
    private static final String XML_FILE_PROPERTY = "xmlFile";  
 
    private static final String PROPERTY_FILE_PROPERTY = "propertyFile";  
 
    private static final String AUTO_SHUTDOWN_PROPERTY = "autoShutdown";  
      
    @SuppressWarnings("unused")  
    private boolean autoShutdown = true;  
      
    public void contextDestroyed(ServletContextEvent arg0)  
    {  
        System.out.println("destroy database pool....");  
    }  
 
    @SuppressWarnings("unchecked")
 public void contextInitialized(ServletContextEvent contextEvent)  
    {  
        ServletContext context = contextEvent.getServletContext(); //对应servlet的init方法中ServletConfig.getServletContext()  
        String appDir = contextEvent.getServletContext().getRealPath("/");  
        Properties properties = new Properties();  
 
        Enumeration names = context.getInitParameterNames();  
        while (names.hasMoreElements()) {  
            String name = (String) names.nextElement();  
            String value = context.getInitParameter(name);  
 
            if (name.equals(XML_FILE_PROPERTY)) {  
                try {  
                    File file = new File(value);  
                    if (file.isAbsolute()) {  
                        JAXPConfigurator.configure(value, false);  
                    } else {  
                        JAXPConfigurator.configure(appDir + File.separator + value, false);  
                    }  
                } catch (ProxoolException e) {  
                    LOG.error("Problem configuring " + value, e);  
                }  
            } else if (name.equals(PROPERTY_FILE_PROPERTY)) {  
                try {  
                    File file = new File(value);  
                    if (file.isAbsolute()) {  
                        PropertyConfigurator.configure(value);  
                    } else {  
                        PropertyConfigurator.configure(appDir + File.separator + value);  
                    }  
                } catch (ProxoolException e) {  
                    LOG.error("Problem configuring " + value, e);  
                }  
            } else if (name.equals(AUTO_SHUTDOWN_PROPERTY)) {  
                autoShutdown = Boolean.valueOf(value).booleanValue();  
            } else if (name.startsWith("jdbc")) { //此处以前是PropertyConfigurator.PREFIX改为jdbc,因为此源码是0.9.1版本的,与0.9RC3版本有点不一样  
                properties.setProperty(name, value);  
            }  
        }  
 
        if (properties.size() > 0) {  
            try {  
                PropertyConfigurator.configure(properties);  
            } catch (ProxoolException e) {  
                LOG.error("Problem configuring using init properties", e);  
            }  
        }  
    }  
 
}