| /* |
| * Copyright 2010 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.logging.impl; |
| |
| import java.util.Date; |
| import java.util.HashSet; |
| import java.util.logging.Formatter; |
| import java.util.logging.LogRecord; |
| |
| /** |
| * Base class for Formatters - provides common functionality. |
| */ |
| public abstract class FormatterImpl extends Formatter { |
| |
| /** |
| * Note that this format is likely to change in the future. |
| * Outputs the meta information in the log record in the following format: |
| * <pre>Date LoggerName\nLEVEL:</pre> |
| * Most formatters will append the message right after the colon |
| */ |
| protected String getRecordInfo(LogRecord event, String newline) { |
| Date date = new Date(event.getMillis()); |
| StringBuilder s = new StringBuilder(); |
| s.append(date.toString()); |
| s.append(" "); |
| s.append(event.getLoggerName()); |
| s.append(newline); |
| s.append(event.getLevel().getName()); |
| s.append(": "); |
| return s.toString(); |
| } |
| |
| // This method is borrowed from AbstractTreeLogger. |
| // TODO(unnurg): once there is a clear place where code used by gwt-dev and |
| // gwt-user can live, move this function there. |
| protected String getStackTraceAsString(Throwable e, String newline, |
| String indent) { |
| if (e == null) { |
| return ""; |
| } |
| // For each cause, print the requested number of entries of its stack |
| // trace, being careful to avoid getting stuck in an infinite loop. |
| // |
| StringBuffer s = new StringBuffer(newline); |
| Throwable currentCause = e; |
| String causedBy = ""; |
| HashSet<Throwable> seenCauses = new HashSet<Throwable>(); |
| while (currentCause != null && !seenCauses.contains(currentCause)) { |
| seenCauses.add(currentCause); |
| s.append(causedBy); |
| causedBy = newline + "Caused by: "; // after 1st, all say "caused by" |
| s.append(currentCause.getClass().getName()); |
| s.append(": " + currentCause.getMessage()); |
| StackTraceElement[] stackElems = currentCause.getStackTrace(); |
| if (stackElems != null) { |
| for (int i = 0; i < stackElems.length; ++i) { |
| s.append(newline + indent + "at "); |
| s.append(stackElems[i].toString()); |
| } |
| } |
| |
| currentCause = currentCause.getCause(); |
| } |
| return s.toString(); |
| } |
| |
| } |