| /* |
| * Copyright (c) 2012, 2016, 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 com.sun.tools.sjavac; |
| |
| import java.io.PrintWriter; |
| import java.io.StringWriter; |
| import java.io.Writer; |
| import java.util.Locale; |
| |
| /** |
| * Utility class only for sjavac logging. |
| * |
| * Logging in sjavac has special requirements when running in server/client |
| * mode. Most of the log messages is generated server-side, but the server |
| * is typically spawned by the client in the background, so the user usually |
| * does not see the server stdout/stderr. For this reason log messages needs |
| * to relayed back to the client that performed the request that generated the |
| * log message. To support this use case this class maintains a per-thread log |
| * instance so that each connected client can have its own instance that |
| * relays messages back to the requesting client. |
| * |
| * On the client-side (or when running sjavac without server-mode) there will |
| * typically just be one Log instance. |
| * |
| * <p><b>This is NOT part of any supported API. |
| * If you write code that depends on this, you do so at your own risk. |
| * This code and its internal interfaces are subject to change or |
| * deletion without notice.</b> |
| */ |
| public class Log { |
| |
| public enum Level { |
| ERROR, |
| WARN, |
| INFO, |
| DEBUG, |
| TRACE; |
| } |
| |
| private static Log stdOutErr = new Log(new PrintWriter(System.out), new PrintWriter(System.err)); |
| private static ThreadLocal<Log> loggers = new ThreadLocal<>(); |
| |
| protected PrintWriter err; // Used for error and warning messages |
| protected PrintWriter out; // Used for other messages |
| protected Level level = Level.INFO; |
| |
| public Log(Writer out, Writer err) { |
| this.out = out == null ? null : new PrintWriter(out, true); |
| this.err = err == null ? null : new PrintWriter(err, true); |
| } |
| |
| public static void setLogForCurrentThread(Log log) { |
| loggers.set(log); |
| } |
| |
| public static void setLogLevel(String l) { |
| setLogLevel(Level.valueOf(l.toUpperCase(Locale.US))); |
| } |
| |
| public static void setLogLevel(Level l) { |
| get().level = l; |
| } |
| |
| static public void trace(String msg) { |
| log(Level.TRACE, msg); |
| } |
| |
| static public void debug(String msg) { |
| log(Level.DEBUG, msg); |
| } |
| |
| static public void info(String msg) { |
| log(Level.INFO, msg); |
| } |
| |
| static public void warn(String msg) { |
| log(Level.WARN, msg); |
| } |
| |
| static public void error(String msg) { |
| log(Level.ERROR, msg); |
| } |
| |
| static public void error(Throwable t) { |
| log(Level.ERROR, t); |
| } |
| |
| static public void log(Level l, String msg) { |
| get().printLogMsg(l, msg); |
| } |
| |
| public static void debug(Throwable t) { |
| log(Level.DEBUG, t); |
| } |
| |
| public static void log(Level l, Throwable t) { |
| StringWriter sw = new StringWriter(); |
| t.printStackTrace(new PrintWriter(sw, true)); |
| log(l, sw.toString()); |
| } |
| |
| static public boolean isDebugging() { |
| return get().isLevelLogged(Level.DEBUG); |
| } |
| |
| protected boolean isLevelLogged(Level l) { |
| return l.ordinal() <= level.ordinal(); |
| } |
| |
| public static Log get() { |
| Log log = loggers.get(); |
| return log != null ? log : stdOutErr; |
| } |
| |
| protected void printLogMsg(Level msgLevel, String msg) { |
| if (isLevelLogged(msgLevel)) { |
| PrintWriter pw = msgLevel.ordinal() <= Level.WARN.ordinal() ? err : out; |
| pw.println(msg); |
| } |
| } |
| } |