ex6_13.txt

j2ee core design patterns

Example 6.13 Logging Filter
public class LoggingFilter extends TemplateFilter {
  public void doPreProcessing(ServletRequest req, ServletResponse res) {
    //do some preprocessing here, such as logging some information about
    // the request before it抯 been handled.
  }

  public void doPostProcessing(ServletRequest req, ServletResponse res){
    // do some post-processing here, such as logging some information
    // about the request and response after the request has been handled
    // and the response generated.
  }
}