package org.autoplot.servlet; import java.io.IOException; import java.io.PrintWriter; import java.text.DateFormat; import java.text.SimpleDateFormat; import java.util.Date; import java.util.logging.ConsoleHandler; import java.util.logging.Handler; import java.util.logging.Level; import java.util.logging.LogRecord; import java.util.logging.Logger; import java.util.logging.SimpleFormatter; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; /** * Secret function for adjusting the log level! * .../SetLogLevel?logger=autoplot.servlet&level=FINE&handler=T * @author jbf */ public class SetLogLevel extends HttpServlet { /** * Processes requests for both HTTP GET and POST methods. * @param request servlet request * @param response servlet response * @throws javax.servlet.ServletException * @throws java.io.IOException */ protected void processRequest(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType("text/html;charset=UTF-8"); try (PrintWriter out = response.getWriter()) { String logger= request.getParameter("logger"); String level= request.getParameter("level"); String handler= request.getParameter("handler"); String format= request.getParameter("format"); String remoteAddr= request.getRemoteAddr(); if ( !remoteAddr.equals("127.0.0.1" ) ) { out.println(""); out.println(""); out.println("Servlet SetLogLevel"); out.println(""); out.println(""); out.println("

.../SetLogLevel must be called from 127.0.0.1
"); out.println(""); } else { if ( logger==null ) { out.println(""); out.println(""); out.println("Servlet SetLogLevel"); out.println(""); out.println(""); out.println("

.../SetLogLevel?logger=autoplot.servlet&level=FINE&handler=T

"); out.println(" logger the logger name, autoplot.servlet is used in this servlet
"); out.println(" level the level, FINE or FINER is used in this servlet
"); out.println(" handler if T then reset and report the handler levels as well
"); out.println(" format =1 for single line to millisecond.
"); out.println(""); } else { Handler[] hh= Logger.getLogger(logger).getHandlers(); Level lev= Level.parse(level); Logger l= Logger.getLogger(logger); l.setLevel( lev ); Logger.getLogger(logger).log(lev, "reset to {0}", level); out.println(""); out.println(""); out.println("Servlet SetLogLevel"); out.println(""); out.println(""); out.println("Loggers:
"); out.println(""+l +" @ "+l.getLevel()+"
" ); if ( hh.length==0 ) { Logger.getLogger(logger).addHandler( new ConsoleHandler() ); hh= Logger.getLogger(logger).getHandlers(); out.println("

Added ConsoleHandler

"); } out.println("Handlers:
"); for ( Handler h: hh ) { if ( handler!=null && lev!=null ) h.setLevel(lev); out.println(" "+h+" @ "+h.getLevel()+"
"); if ( format!=null ) { if ( format.equals("1") ) { final DateFormat df = new SimpleDateFormat("yyyy/MM/dd hh:mm:ss.SSS"); h.setFormatter( new SimpleFormatter() { @Override public synchronized String format(LogRecord record) { StringBuilder builder = new StringBuilder(1000); builder.append(df.format(new Date(record.getMillis()))).append(" - "); builder.append("[").append(record.getSourceClassName()).append("."); builder.append(record.getSourceMethodName()).append("] - "); builder.append("[").append(record.getLevel()).append("] - "); builder.append(formatMessage(record)); builder.append("\n"); return builder.toString(); } }); } } } if ( hh.length==0 ) { out.println(" (no handlers)"); } } } out.println(""); out.println(""); } catch ( IllegalArgumentException | SecurityException e ) { throw new RuntimeException(e); } } // /** * Handles the HTTP GET method. * @param request servlet request * @param response servlet response */ protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { processRequest(request, response); } /** * Handles the HTTP POST method. * @param request servlet request * @param response servlet response */ protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { processRequest(request, response); } /** * Returns a short description of the servlet. */ public String getServletInfo() { return "Short description"; }// }