| /* |
| * Copyright 2006 Google Inc. |
| * |
| * Licensed 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 com.google.gwt.dev.util.log; |
| |
| import java.io.File; |
| import java.io.FileWriter; |
| import java.io.IOException; |
| import java.io.PrintWriter; |
| import java.net.URL; |
| |
| /** |
| * Tree logger that logs to a print writer. |
| */ |
| public final class PrintWriterTreeLogger extends AbstractTreeLogger { |
| |
| private final String indent; |
| |
| private final PrintWriter out; |
| |
| private final Object mutex = new Object(); |
| |
| public PrintWriterTreeLogger() { |
| this(new PrintWriter(System.out, true)); |
| } |
| |
| public PrintWriterTreeLogger(PrintWriter out) { |
| this(out, ""); |
| } |
| |
| public PrintWriterTreeLogger(File logFile) throws IOException { |
| boolean existing = logFile.exists(); |
| this.out = new PrintWriter(new FileWriter(logFile, true), true); |
| this.indent = ""; |
| if (existing) { |
| out.println(); // blank line to mark relaunch |
| } |
| } |
| |
| protected PrintWriterTreeLogger(PrintWriter out, String indent) { |
| this.out = out; |
| this.indent = indent; |
| } |
| |
| @Override |
| protected AbstractTreeLogger doBranch() { |
| return new PrintWriterTreeLogger(out, indent + " "); |
| } |
| |
| @Override |
| protected void doCommitBranch(AbstractTreeLogger childBeingCommitted, |
| Type type, String msg, Throwable caught, HelpInfo helpInfo) { |
| doLog(childBeingCommitted.getBranchedIndex(), type, msg, caught, helpInfo); |
| } |
| |
| @Override |
| protected void doLog(int indexOfLogEntryWithinParentLogger, Type type, |
| String msg, Throwable caught, HelpInfo helpInfo) { |
| synchronized (mutex) { // ensure thread interleaving... |
| out.print(indent); |
| if (type.needsAttention()) { |
| out.print("["); |
| out.print(type.getLabel()); |
| out.print("] "); |
| } |
| |
| out.println(msg); |
| if (helpInfo != null) { |
| URL url = helpInfo.getURL(); |
| if (url != null) { |
| out.print(indent); |
| out.println("For additional info see: " + url.toString()); |
| } |
| } |
| if (caught != null) { |
| caught.printStackTrace(out); |
| } |
| } |
| } |
| } |