| /* |
| * Copyright (c) 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.server.log; |
| |
| import com.sun.tools.sjavac.Log; |
| |
| import java.io.FileWriter; |
| import java.io.IOException; |
| import java.io.PrintWriter; |
| import java.nio.file.Files; |
| import java.nio.file.Path; |
| import java.nio.file.Paths; |
| |
| public class LazyInitFileLog extends Log { |
| |
| String baseFilename; |
| Path destination = null; |
| |
| public LazyInitFileLog(String baseFilename) { |
| super(null, null); |
| this.baseFilename = baseFilename; |
| } |
| |
| protected void printLogMsg(Level msgLevel, String msg) { |
| try { |
| // Lazily initialize out/err |
| if (out == null && isLevelLogged(msgLevel)) { |
| destination = getAvailableDestination(); |
| out = err = new PrintWriter(new FileWriter(destination.toFile()), true); |
| } |
| // Proceed to log the message |
| super.printLogMsg(msgLevel, msg); |
| } catch (IOException e) { |
| // This could be bad. We might have run into an error and we can't |
| // log it. Resort to printing on stdout. |
| System.out.println("IO error occurred: " + e.getMessage()); |
| System.out.println("Original message: [" + msgLevel + "] " + msg); |
| } |
| } |
| |
| /** |
| * @return The first available path of baseFilename, baseFilename.1, |
| * basefilename.2, ... |
| */ |
| private Path getAvailableDestination() { |
| Path p = Paths.get(baseFilename); |
| int i = 1; |
| while (Files.exists(p)) { |
| p = Paths.get(baseFilename + "." + i++); |
| } |
| return p; |
| } |
| |
| public Path getLogDestination() { |
| return destination; |
| } |
| } |