Java by API/javax.servlet/Filter

FilterConfig: getServletContext()

   <source lang="java">

import javax.servlet.Filter; import javax.servlet.FilterChain; import javax.servlet.FilterConfig; import javax.servlet.ServletContext; import javax.servlet.ServletException; import javax.servlet.ServletRequest; import javax.servlet.ServletResponse; public class LogFilter implements Filter {

 FilterConfig config;
 public void setFilterConfig(FilterConfig config) {
   this.config = config;
 }
 public FilterConfig getFilterConfig() {
   return config;
 }
 public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) {
   ServletContext context = getFilterConfig().getServletContext();
   long bef = System.currentTimeMillis();
   try {
     chain.doFilter(req, res);
   } catch (Exception e) {
   } 
   long aft = System.currentTimeMillis();
   context.log("Request to " + req.getRemoteHost() + ": " + (aft - bef));
 }
 public void init(FilterConfig arg0) throws ServletException {
 }
 public void destroy() {
 }

}

      </source>
   
  
 
  

Filter: getFilterConfig()

   <source lang="java">

import javax.servlet.Filter; import javax.servlet.FilterChain; import javax.servlet.FilterConfig; import javax.servlet.ServletContext; import javax.servlet.ServletException; import javax.servlet.ServletRequest; import javax.servlet.ServletResponse; public class LogFilter implements Filter {

 FilterConfig config;
 public void setFilterConfig(FilterConfig config) {
   this.config = config;
 }
 public FilterConfig getFilterConfig() {
   return config;
 }
 public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) {
   ServletContext context = getFilterConfig().getServletContext();
   long bef = System.currentTimeMillis();
   try {
     chain.doFilter(req, res);
   } catch (Exception e) {
   } 
   long aft = System.currentTimeMillis();
   context.log("Request to " + req.getRemoteHost() + ": " + (aft - bef));
 }
 public void init(FilterConfig arg0) throws ServletException {
 }
 public void destroy() {
 }

}

      </source>
   
  
 
  

implements Filter

   <source lang="java">

import javax.servlet.Filter; import javax.servlet.FilterChain; import javax.servlet.FilterConfig; import javax.servlet.ServletContext; import javax.servlet.ServletException; import javax.servlet.ServletRequest; import javax.servlet.ServletResponse; public class LogFilter implements Filter {

 FilterConfig config;
 public void setFilterConfig(FilterConfig config) {
   this.config = config;
 }
 public FilterConfig getFilterConfig() {
   return config;
 }
 public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) {
   ServletContext context = getFilterConfig().getServletContext();
   long bef = System.currentTimeMillis();
   try {
     chain.doFilter(req, res);
   } catch (Exception e) {
   } 
   long aft = System.currentTimeMillis();
   context.log("Request to " + req.getRemoteHost() + ": " + (aft - bef));
 }
 public void init(FilterConfig arg0) throws ServletException {
 }
 public void destroy() {
 }

}

      </source>