As I stated before/during the holiday break, I want to expand this servlet to provide rich a rich configuration mechanism for a web application via a servlet.
To do: 1) Display and navigate a hierarchical list of loggers. I have written some code to parse through the loggers to retrieve the hierarchy. 2) Allow setting of loggers that have not yet been created. 3) Tie the servlet into the chosen repository selector mechanism so it acts on the applications repository. But, I am going to head back into plugins, receivers, and watchdogs for a while. If anyone wants to take a whack at this in the meantime, let me know. thanks, -Mark > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] > Sent: Wednesday, January 22, 2003 11:54 PM > To: [EMAIL PROTECTED] > Subject: cvs commit: jakarta-log4j/src/java/org/apache/log4j/servlet > ConfigurationServlet.java > > > mwomack 2003/01/22 23:53:43 > > Added: src/java/org/apache/log4j/servlet ConfigurationServlet.java > Log: > Added ConfigurationServlet class, submitted by Luther E. Birdzell. > > Revision Changes Path > 1.1 > jakarta-log4j/src/java/org/apache/log4j/servlet/ConfigurationServlet.java > > Index: ConfigurationServlet.java > =================================================================== > /* > * Copyright (C) The Apache Software Foundation. All rights reserved. > * > * This software is published under the terms of the Apache Software > * License version 1.1, a copy of which has been included with this > * distribution in the LICENSE.txt file. > */ > > package org.apache.log4j.servlet; > > import java.io.IOException; > import java.io.PrintWriter; > > import java.util.ArrayList; > import java.util.Collections; > import java.util.Comparator; > import java.util.Enumeration; > import java.util.Iterator; > import java.util.List; > > import javax.servlet.ServletException; > import javax.servlet.SingleThreadModel; > import javax.servlet.http.HttpServlet; > import javax.servlet.http.HttpServletRequest; > import javax.servlet.http.HttpServletResponse; > > import org.apache.log4j.Logger; > import org.apache.log4j.LogManager; > import org.apache.log4j.Level; > > > /** > * A servlet used to dynamically adjust package logging levels > * while an application is running. NOTE: This servlet is > * only aware of pre-configured packages and packages that > contain objects > * that have logged at least one message since application startup. > * > * @author <a href="mailto:[EMAIL PROTECTED]";>Luther E. Birdzell</a> > * @since 1.3 > */ > public class ConfigurationServlet extends HttpServlet > implements SingleThreadModel > { > /** > * The response content type: text/html > */ > public static final String CONTENT_TYPE = "text/html"; > > /** > * The root appender. > */ > public static final String ROOT = "Root"; > > /** > * The name of the class / package. > */ > public static final String CLASS = "CLASS"; > > /** > * The logging level. > */ > public static final String PRIORITY = "PRIORITY"; > > /** > * Print the status of all current <code>Logger</code>s and > * an option to change their respective logging levels. > * > * @param request a <code>HttpServletRequest</code> value > * @param response a <code>HttpServletResponse</code> value > * @exception ServletException if an error occurs > * @exception IOException if an error occurs > */ > public void doGet(HttpServletRequest request, > HttpServletResponse response) > throws ServletException, IOException > { > response.setContentType(CONTENT_TYPE); > > PrintWriter out = response.getWriter(); > List loggers = getSortedLoggers(); > Logger logger = null; > String loggerName = null; > int loggerNum = 0; > > // print title and header > out.println("<html><head><title>Log4J Control > Console</title></head>" + > "<body><H3>Log4J Control Console</H3>"); > out.println("<A href=\"" + request.getRequestURI() + > "\">Refresh</A><HR>"); > out.println("<table width=\"50%\" border=\"1\">"); > out.println("<tr BGCOLOR=\"#5991A6\">"); > out.println("<td><FONT COLOR=\"BLACK\" > FACE=\"Helvetica\"><B>Class</B></FONT></td>"); > out.println("<td><FONT COLOR=\"BLACK\" > FACE=\"Helvetica\"><B>Priority</B></FONT></td>"); > out.println("</tr>"); > > // print the root Logger > displayLogger(out, Logger.getRootLogger(), loggerNum++, > request); > > // print the rest of the loggers > Iterator ii = loggers.iterator(); > while( ii.hasNext() ) > { > displayLogger(out, (Logger) ii.next(), loggerNum++, > request); > } > > out.println("</table>"); > out.println("<FONT SIZE=\"-3\" COLOR=\"BLACK\" > FACE=\"Helvetica\">* "+ > "Inherits Priority From Parent.</FONT><BR>"); > out.println("<A href=\"" + request.getRequestURI() + > "\">Refresh</A><HR>"); > > // print set options > out.println("<FORM action=\"" + > request.getRequestURI() + "\" method=\"post\">"); > out.println("<FONT SIZE=\"+2\" COLOR=\"BLACK\" > FACE=\"Helvetica\"><U>"+ > "Set Log4J Option</U><BR><BR></FONT>"); > out.println("<FONT COLOR=\"BLACK\" FACE=\"Helvetica\">"); > out.println("<table width=\"50%\" border=\"1\">"); > out.println("<tr BGCOLOR=\"#5991A6\">"); > out.println("<td><FONT COLOR=\"BLACK\" "+ > "FACE=\"Helvetica\"><B>Class > Name:</B></FONT></td>"); > out.println("<td><SELECT name=\"CLASS\">"); > out.println("<OPTION VALUE=\"" + ROOT + "\">" + ROOT + > "</OPTION>"); > > ii = loggers.iterator(); > while( ii.hasNext() ) > { > logger = (Logger) ii.next(); > loggerName = (logger.getName().equals("") ? "Root" > : logger.getName()); > out.println("<OPTION VALUE=\"" + loggerName + "\">" > + loggerName + "</OPTION>"); > } > out.println("</SELECT><BR></td></tr>"); > > // print logging levels > out.println("<tr BGCOLOR=\"#5991A6\"><td><FONT > COLOR=\"BLACK\" "+ > "FACE=\"Helvetica\"><B>Priority:</B></FONT></td>"); > out.println("<td><SELECT name=\"PRIORITY\">"); > out.println("<OPTION VALUE=\"" + Level.OFF + "\">" + > Level.OFF + "</OPTION>"); > out.println("<OPTION VALUE=\"" + Level.FATAL + "\">" + > Level.FATAL + "</OPTION>"); > out.println("<OPTION VALUE=\"" + Level.ERROR + "\">" + > Level.ERROR + "</OPTION>"); > out.println("<OPTION VALUE=\"" + Level.WARN + "\">" + > Level.WARN + "</OPTION>"); > out.println("<OPTION VALUE=\"" + Level.INFO + "\">" + > Level.INFO + "</OPTION>"); > out.println("<OPTION VALUE=\"" + Level.DEBUG + "\">" + > Level.DEBUG + "</OPTION>"); > out.println("<OPTION VALUE=\"" + Level.ALL + "\">" + > Level.ALL + "</OPTION>"); > out.println("</SELECT><BR></td></tr>"); > out.println("</table></FONT>"); > out.println("<input type=\"submit\" name=\"Submit\" > value=\"Set Option\"></FONT>"); > out.println("</FORM>"); > out.println("</body></html>"); > > out.flush(); > out.close(); > } > > /** > * Change a <code>Logger</code>'s level, then call > <code>doGet</code> > * to refresh the page. > * > * @param request a <code>HttpServletRequest</code> value > * @param response a <code>HttpServletResponse</code> value > * @exception ServletException if an error occurs > * @exception java.io.IOException if an error occurs > */ > public void doPost(HttpServletRequest request, > HttpServletResponse response) > throws ServletException, IOException > { > String className = (String) request.getParameter(CLASS); > String priority = (String) request.getParameter(PRIORITY); > > if (className != null) > { > setClass(className, priority); > } > > doGet(request, response); > } > > // print a Logger and its current level > private void displayLogger(PrintWriter out, Logger logger, > int row, HttpServletRequest request) > { > String color = null; > String loggerName = (logger.getName().equals("") ? ROOT > : logger.getName()); > > color = (row%2 == 1) ? "#E1E1E1" : "#FBFBFB"; > > out.println("<tr BGCOLOR=\"" + color + "\">"); > out.println("<td><FONT SIZE=\"-2\" COLOR=\"BLACK\" > FACE=\"Helvetica\">" + > loggerName + "</FONT></td>"); > out.println("<td><FONT SIZE=\"-2\" COLOR=\"BLACK\" > FACE=\"Helvetica\">" + > ( (logger.getLevel() == null) ? > logger.getEffectiveLevel().toString() + > "*" : logger.getLevel().toString()) + > "</FONT></td>"); > out.println("</tr>"); > } > > // set a logger's level > private synchronized String setClass(String className, > String level) > { > Logger logger = null; > String message = null; > > try > { > logger = (className.equals(ROOT)) ? > logger.getRootLogger() : > logger.getLogger(className); > > logger.setLevel(Level.toLevel(level)); > } > > catch (Exception e) > { > System.out.println("ERROR Setting LOG4J Logger:" + e); > } > > return "Message Set For " + > (logger.getName().equals("") ? ROOT : logger.getName()); > } > > // get a sorted list of all current loggers > private List getSortedLoggers() > { > Logger logger = null; > Enumeration enum = LogManager.getCurrentLoggers(); > Comparator comp = new LoggerComparator(); > ArrayList list = new ArrayList(); > > // Add all current loggers to the list > while(enum.hasMoreElements()) > { > list.add(enum.nextElement()); > } > > // sort the loggers > Collections.sort(list, comp); > > return list; > } > > /** > * Compare the names of two <code>Logger</code>s. Used > * for sorting. > */ > private class LoggerComparator implements Comparator > { > > /** > * Compare the names of two <code>Logger</code>s. > * > * @param o1 an <code>Object</code> value > * @param o2 an <code>Object</code> value > * @return an <code>int</code> value > */ > public int compare(Object o1, Object o2) > { > Logger logger1 = (Logger) o1; > Logger logger2 = (Logger) o2;; > > String logger1Name = null; > String logger2Name = null; > > if ( logger1 != null ) > logger1Name = (logger1.getName().equals("") ? > ROOT : logger1.getName()); > > if ( logger2 != null ) > logger2Name = (logger2.getName().equals("") ? > ROOT : logger2.getName()); > > return logger1Name.compareTo(logger2Name); > } > > /** > * Return <code>true</code> if the <code>Object</code> is a > * <code>LoggerComparator</code> instance. > * > * > * @param o an <code>Object</code> value > * @return a <code>boolean</code> value > */ > public boolean equals(Object o) > { > > if (o instanceof LoggerComparator) > return true; > > else > return false; > } > } > > }//EOF > > > > > > -- > To unsubscribe, e-mail: <mailto:[EMAIL PROTECTED]> For additional commands, e-mail: <mailto:[EMAIL PROTECTED]> -- To unsubscribe, e-mail: <mailto:[EMAIL PROTECTED]> For additional commands, e-mail: <mailto:[EMAIL PROTECTED]>
