| /* |
| * Copyright (C) 2008 The Android Open Source Project |
| * |
| * 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.android.internal.logging; |
| |
| import android.util.Log; |
| |
| import java.util.logging.*; |
| import java.util.Date; |
| import java.text.MessageFormat; |
| import java.io.PrintWriter; |
| import java.io.StringWriter; |
| |
| /** |
| * Implements a {@link java.util.logging.Logger} handler that writes to the Android log. The |
| * implementation is rather straightforward. The name of the logger serves as |
| * the log tag. Only the log levels need to be converted appropriately. For |
| * this purpose, the following mapping is being used: |
| * |
| * <table> |
| * <tr> |
| * <th>logger level</th> |
| * <th>Android level</th> |
| * </tr> |
| * <tr> |
| * <td> |
| * SEVERE |
| * </td> |
| * <td> |
| * ERROR |
| * </td> |
| * </tr> |
| * <tr> |
| * <td> |
| * WARNING |
| * </td> |
| * <td> |
| * WARN |
| * </td> |
| * </tr> |
| * <tr> |
| * <td> |
| * INFO |
| * </td> |
| * <td> |
| * INFO |
| * </td> |
| * </tr> |
| * <tr> |
| * <td> |
| * CONFIG |
| * </td> |
| * <td> |
| * DEBUG |
| * </td> |
| * </tr> |
| * <tr> |
| * <td> |
| * FINE, FINER, FINEST |
| * </td> |
| * <td> |
| * VERBOSE |
| * </td> |
| * </tr> |
| * </table> |
| */ |
| public class AndroidHandler extends Handler { |
| /** |
| * Holds the formatter for all Android log handlers. |
| */ |
| private static final Formatter THE_FORMATTER = new Formatter() { |
| @Override |
| public String format(LogRecord r) { |
| Throwable thrown = r.getThrown(); |
| if (thrown != null) { |
| StringWriter sw = new StringWriter(); |
| PrintWriter pw = new PrintWriter(sw); |
| sw.write(r.getMessage()); |
| sw.write("\n"); |
| thrown.printStackTrace(pw); |
| pw.flush(); |
| return sw.toString(); |
| } else { |
| return r.getMessage(); |
| } |
| } |
| }; |
| |
| /** |
| * Constructs a new instance of the Android log handler. |
| */ |
| public AndroidHandler() { |
| setFormatter(THE_FORMATTER); |
| } |
| |
| @Override |
| public void close() { |
| // No need to close, but must implement abstract method. |
| } |
| |
| @Override |
| public void flush() { |
| // No need to flush, but must implement abstract method. |
| } |
| |
| @Override |
| public void publish(LogRecord record) { |
| try { |
| int level = getAndroidLevel(record.getLevel()); |
| String tag = record.getLoggerName(); |
| |
| if (tag == null) { |
| // Anonymous logger. |
| tag = "null"; |
| } else { |
| // Tags must be <= 23 characters. |
| int length = tag.length(); |
| if (length > 23) { |
| // Most loggers use the full class name. Try dropping the |
| // package. |
| int lastPeriod = tag.lastIndexOf("."); |
| if (length - lastPeriod - 1 <= 23) { |
| tag = tag.substring(lastPeriod + 1); |
| } else { |
| // Use last 23 chars. |
| tag = tag.substring(tag.length() - 23); |
| } |
| } |
| } |
| |
| if (!Log.isLoggable(tag, level)) { |
| return; |
| } |
| |
| String message = getFormatter().format(record); |
| Log.println(level, tag, message); |
| } catch (RuntimeException e) { |
| Log.e("AndroidHandler", "Error logging message.", e); |
| } |
| } |
| |
| /** |
| * Converts a {@link java.util.logging.Logger} logging level into an Android one. |
| * |
| * @param level The {@link java.util.logging.Logger} logging level. |
| * |
| * @return The resulting Android logging level. |
| */ |
| static int getAndroidLevel(Level level) { |
| int value = level.intValue(); |
| if (value >= 1000) { // SEVERE |
| return Log.ERROR; |
| } else if (value >= 900) { // WARNING |
| return Log.WARN; |
| } else if (value >= 800) { // INFO |
| return Log.INFO; |
| } else { |
| return Log.DEBUG; |
| } |
| } |
| |
| } |