war/src/main/java/pnews/servlet/RequesterLog.java

   1 package pnews.servlet;
   2
   3 import java.io.BufferedWriter;
   4 import java.io.FileWriter;
   5 import java.io.IOException;
   6 import java.io.Writer;
   7 import java.util.logging.Level;
   8 import java.util.logging.Logger;
   9
  10 import javax.servlet.http.HttpServletRequest;
  11
  12 public class RequesterLog {
  13         public static final RequesterLog singleton = new RequesterLog();
  14         private Writer writer;
  15         private Logger LOG = Logger.getLogger(RequesterLog.class.getName());
  16
  17         public void writeRequest(HttpServletRequest rq) {
  18                 try {
  19                         synchronized(this) {
  20                                 if (writer == null)
  21                                         writer = new BufferedWriter(new FileWriter("access.log", true), 1024);
  22                         }
  23
  24                         synchronized (writer) {
  25                                 writer.write(rq.getRemoteAddr() + " " + rq.getRequestURI() + " " + rq.getQueryString() + "\n");
  26                                 writer.flush();
  27                         }
  28                 } catch (IOException e) {
  29                         LOG.log(Level.SEVERE, "Fails to log requester information", e);
  30                 }
  31         }
  32 }