| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.hadoop.log; |
| |
| import java.io.*; |
| import java.net.*; |
| import java.util.regex.Pattern; |
| |
| import javax.servlet.*; |
| import javax.servlet.http.*; |
| |
| import org.apache.commons.logging.*; |
| import org.apache.commons.logging.impl.*; |
| import org.apache.hadoop.http.HttpServer; |
| import org.apache.hadoop.util.ServletUtil; |
| |
| /** |
| * Change log level in runtime. |
| */ |
| public class LogLevel { |
| public static final String USAGES = "\nUSAGES:\n" |
| + "java " + LogLevel.class.getName() |
| + " -getlevel <host:port> <name>\n" |
| + "java " + LogLevel.class.getName() |
| + " -setlevel <host:port> <name> <level>\n"; |
| |
| /** |
| * A command line implementation |
| */ |
| public static void main(String[] args) { |
| if (args.length == 3 && "-getlevel".equals(args[0])) { |
| process("http://" + args[1] + "/logLevel?log=" + args[2]); |
| return; |
| } |
| else if (args.length == 4 && "-setlevel".equals(args[0])) { |
| process("http://" + args[1] + "/logLevel?log=" + args[2] |
| + "&level=" + args[3]); |
| return; |
| } |
| |
| System.err.println(USAGES); |
| System.exit(-1); |
| } |
| |
| private static void process(String urlstring) { |
| try { |
| URL url = new URL(urlstring); |
| System.out.println("Connecting to " + url); |
| URLConnection connection = url.openConnection(); |
| connection.connect(); |
| |
| BufferedReader in = new BufferedReader(new InputStreamReader( |
| connection.getInputStream())); |
| for(String line; (line = in.readLine()) != null; ) |
| if (line.startsWith(MARKER)) { |
| System.out.println(TAG.matcher(line).replaceAll("")); |
| } |
| in.close(); |
| } catch (IOException ioe) { |
| System.err.println("" + ioe); |
| } |
| } |
| |
| static final String MARKER = "<!-- OUTPUT -->"; |
| static final Pattern TAG = Pattern.compile("<[^>]*>"); |
| |
| /** |
| * A servlet implementation |
| */ |
| public static class Servlet extends HttpServlet { |
| private static final long serialVersionUID = 1L; |
| |
| public void doGet(HttpServletRequest request, HttpServletResponse response |
| ) throws ServletException, IOException { |
| |
| // Do the authorization |
| if (!HttpServer.hasAdministratorAccess(getServletContext(), request, |
| response)) { |
| return; |
| } |
| |
| PrintWriter out = ServletUtil.initHTML(response, "Log Level"); |
| String logName = ServletUtil.getParameter(request, "log"); |
| String level = ServletUtil.getParameter(request, "level"); |
| |
| if (logName != null) { |
| out.println("<br /><hr /><h3>Results</h3>"); |
| out.println(MARKER |
| + "Submitted Log Name: <b>" + logName + "</b><br />"); |
| |
| Log log = LogFactory.getLog(logName); |
| out.println(MARKER |
| + "Log Class: <b>" + log.getClass().getName() +"</b><br />"); |
| if (level != null) { |
| out.println(MARKER + "Submitted Level: <b>" + level + "</b><br />"); |
| } |
| |
| if (log instanceof Log4JLogger) { |
| process(((Log4JLogger)log).getLogger(), level, out); |
| } |
| else if (log instanceof Jdk14Logger) { |
| process(((Jdk14Logger)log).getLogger(), level, out); |
| } |
| else { |
| out.println("Sorry, " + log.getClass() + " not supported.<br />"); |
| } |
| } |
| |
| out.println(FORMS); |
| out.println(ServletUtil.HTML_TAIL); |
| } |
| |
| static final String FORMS = "\n<br /><hr /><h3>Get / Set</h3>" |
| + "\n<form>Log: <input type='text' size='50' name='log' /> " |
| + "<input type='submit' value='Get Log Level' />" |
| + "</form>" |
| + "\n<form>Log: <input type='text' size='50' name='log' /> " |
| + "Level: <input type='text' name='level' /> " |
| + "<input type='submit' value='Set Log Level' />" |
| + "</form>"; |
| |
| private static void process(org.apache.log4j.Logger log, String level, |
| PrintWriter out) throws IOException { |
| if (level != null) { |
| log.setLevel(org.apache.log4j.Level.toLevel(level)); |
| out.println(MARKER + "Setting Level to " + level + " ...<br />"); |
| } |
| out.println(MARKER |
| + "Effective level: <b>" + log.getEffectiveLevel() + "</b><br />"); |
| } |
| |
| private static void process(java.util.logging.Logger log, String level, |
| PrintWriter out) throws IOException { |
| if (level != null) { |
| log.setLevel(java.util.logging.Level.parse(level)); |
| out.println(MARKER + "Setting Level to " + level + " ...<br />"); |
| } |
| |
| java.util.logging.Level lev; |
| for(; (lev = log.getLevel()) == null; log = log.getParent()); |
| out.println(MARKER + "Effective level: <b>" + lev + "</b><br />"); |
| } |
| } |
| } |