| /* |
| * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package jdk.nashorn.internal.runtime; |
| |
| import java.util.HashMap; |
| import java.util.Map; |
| import java.util.Map.Entry; |
| import java.util.logging.ConsoleHandler; |
| import java.util.logging.Formatter; |
| import java.util.logging.Handler; |
| import java.util.logging.Level; |
| import java.util.logging.LogRecord; |
| import java.util.logging.Logger; |
| |
| /** |
| * Logging system for getting loggers for arbitrary subsystems as |
| * specified on the command line. Supports all standard log levels |
| * |
| */ |
| public final class Logging { |
| |
| private Logging() { |
| } |
| |
| /** Loggers */ |
| |
| private static final Logger disabledLogger = Logger.getLogger("disabled"); |
| |
| static { |
| try { |
| Logging.disabledLogger.setLevel(Level.OFF); |
| } catch (final SecurityException e) { |
| //ignored |
| } |
| } |
| |
| /** Maps logger name to loggers. Names are typically per package */ |
| private static final Map<String, Logger> loggers = new HashMap<>(); |
| |
| private static String lastPart(final String packageName) { |
| final String[] parts = packageName.split("\\."); |
| if (parts.length == 0) { |
| return packageName; |
| } |
| return parts[parts.length - 1]; |
| } |
| |
| /** |
| * Get a logger for a given class, generating a logger name based on the |
| * class name |
| * |
| * @param name the name to use as key for the logger |
| * @return the logger |
| */ |
| public static Logger getLogger(final String name) { |
| final Logger logger = Logging.loggers.get(name); |
| if (logger != null) { |
| return logger; |
| } |
| return Logging.disabledLogger; |
| } |
| |
| /** |
| * Get a logger for a given name or create it if not already there, typically |
| * used for mapping system properties to loggers |
| * |
| * @param name the name to use as key |
| * @param level log lever to reset existing logger with, or create new logger with |
| * @return the logger |
| */ |
| public static Logger getOrCreateLogger(final String name, final Level level) { |
| final Logger logger = Logging.loggers.get(name); |
| if (logger == null) { |
| return instantiateLogger(name, level); |
| } |
| logger.setLevel(level); |
| return logger; |
| } |
| |
| /** |
| * Initialization function that is called to instantiate the logging system. It takes |
| * logger names (keys) and logging labels respectively |
| * |
| * @param map a map where the key is a logger name and the value a logging level |
| * @throws IllegalArgumentException if level or names cannot be parsed |
| */ |
| public static void initialize(final Map<String, String> map) throws IllegalArgumentException { |
| try { |
| for (final Entry<String, String> entry : map.entrySet()) { |
| Level level; |
| |
| final String key = entry.getKey(); |
| final String value = entry.getValue(); |
| if ("".equals(value)) { |
| level = Level.INFO; |
| } else { |
| level = Level.parse(value.toUpperCase()); |
| } |
| |
| final String name = Logging.lastPart(key); |
| final Logger logger = instantiateLogger(name, level); |
| |
| Logging.loggers.put(name, logger); |
| } |
| } catch (final IllegalArgumentException | SecurityException e) { |
| throw e; |
| } |
| } |
| |
| private static Logger instantiateLogger(final String name, final Level level) { |
| final Logger logger = java.util.logging.Logger.getLogger(name); |
| for (final Handler h : logger.getHandlers()) { |
| logger.removeHandler(h); |
| } |
| |
| logger.setLevel(level); |
| logger.setUseParentHandlers(false); |
| final Handler c = new ConsoleHandler(); |
| |
| c.setFormatter(new Formatter() { |
| @Override |
| public String format(final LogRecord record) { |
| final StringBuilder sb = new StringBuilder(); |
| |
| sb.append('[') |
| .append(record.getLoggerName()) |
| .append("] ") |
| .append(record.getMessage()) |
| .append('\n'); |
| |
| return sb.toString(); |
| } |
| }); |
| logger.addHandler(c); |
| c.setLevel(level); |
| |
| return logger; |
| } |
| |
| } |