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/*
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* Java libusb wrapper
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* Copyright (c) 2005-2006 Andreas Schläpfer <spandi at users.sourceforge.net>
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*
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* http://libusbjava.sourceforge.net
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* This library is covered by the LGPL, read LGPL.txt for details.
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*/
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package ch.ntb.usb.logger;
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import java.io.InputStream;
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import java.util.Properties;
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import java.util.logging.ConsoleHandler;
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import java.util.logging.Handler;
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import java.util.logging.Level;
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import java.util.logging.LogManager;
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import java.util.logging.Logger;
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public class LogUtil {
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// debug this class
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private static final boolean debugLogUtil = false;
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private static final String PLUGIN_ID = "ch.ntb.usb";
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private static final String PROPERTIES_FILE = ".configure";
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private static final String LOGGER_WARNING = "Warning in class "
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+ LogUtil.class.getName()
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+ ": could not load the logger properties file " + PROPERTIES_FILE;
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private static boolean debugEnabled;
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static {
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createLoggersFromProperties();
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}
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private static void debugMsg(String method, String message) {
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if (debugLogUtil) {
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System.out.println(method + ": " + message);
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}
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}
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public static void setLevel(Logger logger, Level loglevel) {
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Handler[] h = logger.getHandlers();
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for (int i = 0; i < h.length; i++) {
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System.out.println("setLevel " + loglevel.toString());
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h[i].setLevel(loglevel);
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}
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logger.setLevel(loglevel);
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}
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public static Logger getLogger(String name) {
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debugMsg("getLogger", name);
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LogManager manager = LogManager.getLogManager();
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// check if logger is already registered
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Logger logger = manager.getLogger(name);
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if (logger == null) {
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logger = Logger.getLogger(name);
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setLevel(logger, Level.OFF);
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manager.addLogger(logger);
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debugMsg("getLogger", "creating new logger");
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}
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if (logger.getLevel() == null) {
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debugMsg("getLogger", "level == null -> setLevel to OFF ");
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setLevel(logger, Level.OFF);
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}
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debugMsg("getLogger", "logLevel " + logger.getLevel().getName());
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return logger;
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}
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private static void initLevel(Logger logger, Level loglevel) {
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Handler[] h = logger.getHandlers();
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for (int i = 0; i < h.length; i++) {
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logger.removeHandler(h[i]);
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}
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Handler console = new ConsoleHandler();
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console.setLevel(loglevel);
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logger.addHandler(console);
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logger.setLevel(loglevel);
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logger.setUseParentHandlers(false);
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}
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private static void createLoggersFromProperties() {
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try {
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debugMsg(LogUtil.class.getName(), "createLoggersFromProperties");
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InputStream is = LogUtil.class.getClassLoader()
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.getResourceAsStream(PROPERTIES_FILE);
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if (is == null) {
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System.err.println(LOGGER_WARNING);
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} else {
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Properties prop = new Properties();
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prop.load(is);
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debugMsg("createLoggersFromProperties",
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"properties file loaded: " + PROPERTIES_FILE);
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debugMsg("createLoggersFromProperties", "file content:\n"
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+ prop.toString());
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// get global debug enable flag
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debugEnabled = Boolean.parseBoolean(prop.getProperty(PLUGIN_ID
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+ "/debug"));
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debugMsg("createLoggersFromProperties", "debuging enabled: "
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+ debugEnabled);
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// get and configure loggers
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boolean moreLoggers = true;
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int loggerCount = 0;
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while (moreLoggers) {
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String loggerProp = prop.getProperty(PLUGIN_ID
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+ "/debug/logger" + loggerCount);
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loggerCount++;
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if (loggerProp != null) {
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// parse string and get logger name and log level
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int slashIndex = loggerProp.indexOf('/');
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String loggerName = loggerProp.substring(0, slashIndex)
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.trim();
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String logLevel = loggerProp.substring(slashIndex + 1,
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loggerProp.length());
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// register logger
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Level level;
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if (debugEnabled) {
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level = Level.parse(logLevel);
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} else {
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level = Level.OFF;
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}
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Logger logger = getLogger(loggerName);
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initLevel(logger, level);
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debugMsg("createLoggersFromProperties",
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"create logger " + loggerName + " with level "
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+ level.toString());
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} else {
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moreLoggers = false;
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}
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}
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}
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} catch (Exception e) {
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e.printStackTrace();
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}
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}
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}
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