datasourcelistener.java

来自「JAVA Servlet2.3外文书籍源码」· Java 代码 · 共 43 行

package persistence.database;

import javax.naming.InitialContext;
import javax.servlet.*;
import javax.servlet.http.*;
import javax.naming.*;

public class DataSourceListener implements ServletContextListener {

  /** Global JNDI name */
  public static String JNDI_NAME;

  private ServletContext sctx;

  public void contextInitialized(ServletContextEvent event) {

    sctx = event.getServletContext();

    // Read configuration data from XML
    // and bind the specified data source.
    try {
      Class cls = Class.forName(sctx.getInitParameter("DataSourceConfig"));
      DataSourceConfig cfig = (DataSourceConfig) cls.newInstance();
      cfig.init(sctx, sctx.getInitParameter("DataSourceConfigXML"));
      InitialContext ctx = new InitialContext();
      JNDI_NAME = sctx.getInitParameter("DataSourceConfig");
      try
      {
      ctx.bind(JNDI_NAME, cfig.getDataSource());	
      }
      catch (Exception e)
      {
        System.out.print(e.toString());
      }
    } catch (Throwable t) {
      sctx.log("DataSourceListener", t);
    }
  }

  public void contextDestroyed(ServletContextEvent event) {
    sctx = null;
  }
}