| /* |
| * Copyright (C) 2017 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.server.content; |
| |
| import android.app.job.JobParameters; |
| import android.os.Build; |
| import android.os.Environment; |
| import android.os.FileUtils; |
| import android.os.Handler; |
| import android.os.Looper; |
| import android.os.Message; |
| import android.os.SystemProperties; |
| import android.text.format.DateUtils; |
| import android.util.Log; |
| import android.util.Slog; |
| |
| import com.android.internal.annotations.GuardedBy; |
| import com.android.internal.util.IntPair; |
| import com.android.server.IoThread; |
| |
| import libcore.io.IoUtils; |
| |
| import java.io.BufferedReader; |
| import java.io.File; |
| import java.io.FileReader; |
| import java.io.FileWriter; |
| import java.io.IOException; |
| import java.io.PrintWriter; |
| import java.io.Reader; |
| import java.io.Writer; |
| import java.text.SimpleDateFormat; |
| import java.util.Arrays; |
| import java.util.Date; |
| import java.util.concurrent.TimeUnit; |
| |
| /** |
| * Implements a rotating file logger for the sync manager, which is enabled only on userdebug/eng |
| * builds (unless debug.synclog is set to 1). |
| * |
| * Note this class could be used for other purposes too, but in general we don't want various |
| * system components to log to files, so it's put in a local package here. |
| */ |
| public class SyncLogger { |
| private static final String TAG = "SyncLogger"; |
| |
| private static SyncLogger sInstance; |
| |
| // Special UID used for logging to denote the self process. |
| public static final int CALLING_UID_SELF = -1; |
| |
| SyncLogger() { |
| } |
| |
| /** |
| * @return the singleton instance. |
| */ |
| public static synchronized SyncLogger getInstance() { |
| if (sInstance == null) { |
| final String flag = SystemProperties.get("debug.synclog"); |
| final boolean enable = |
| (Build.IS_DEBUGGABLE |
| || "1".equals(flag) |
| || Log.isLoggable(TAG, Log.VERBOSE)) && !"0".equals(flag); |
| if (enable) { |
| sInstance = new RotatingFileLogger(); |
| } else { |
| sInstance = new SyncLogger(); |
| } |
| } |
| return sInstance; |
| } |
| |
| /** |
| * Write strings to the log file. |
| */ |
| public void log(Object... message) { |
| } |
| |
| /** |
| * Remove old log files. |
| */ |
| public void purgeOldLogs() { |
| // The default implementation is no-op. |
| } |
| |
| public String jobParametersToString(JobParameters params) { |
| // The default implementation is no-op. |
| return ""; |
| } |
| |
| /** |
| * Dump all existing log files into a given writer. |
| */ |
| public void dumpAll(PrintWriter pw) { |
| } |
| |
| /** |
| * @return whether log is enabled or not. |
| */ |
| public boolean enabled() { |
| return false; |
| } |
| |
| /** |
| * Actual implementation which is only used on userdebug/eng builds (by default). |
| */ |
| private static class RotatingFileLogger extends SyncLogger { |
| private final Object mLock = new Object(); |
| |
| private final long mKeepAgeMs = TimeUnit.DAYS.toMillis(7); |
| |
| private static final SimpleDateFormat sTimestampFormat |
| = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS"); |
| |
| private static final SimpleDateFormat sFilenameDateFormat |
| = new SimpleDateFormat("yyyy-MM-dd"); |
| |
| @GuardedBy("mLock") |
| private final Date mCachedDate = new Date(); |
| |
| @GuardedBy("mLock") |
| private final StringBuilder mStringBuilder = new StringBuilder(); |
| |
| private final File mLogPath; |
| |
| @GuardedBy("mLock") |
| private long mCurrentLogFileDayTimestamp; |
| |
| @GuardedBy("mLock") |
| private Writer mLogWriter; |
| |
| @GuardedBy("mLock") |
| private boolean mErrorShown; |
| |
| private static final boolean DO_LOGCAT = Log.isLoggable(TAG, Log.DEBUG); |
| |
| private final MyHandler mHandler; |
| |
| RotatingFileLogger() { |
| mLogPath = new File(Environment.getDataSystemDirectory(), "syncmanager-log"); |
| mHandler = new MyHandler(IoThread.get().getLooper()); |
| } |
| |
| @Override |
| public boolean enabled() { |
| return true; |
| } |
| |
| private void handleException(String message, Exception e) { |
| if (!mErrorShown) { |
| Slog.e(TAG, message, e); |
| mErrorShown = true; |
| } |
| } |
| |
| @Override |
| public void log(Object... message) { |
| if (message == null) { |
| return; |
| } |
| final long now = System.currentTimeMillis(); |
| mHandler.log(now, message); |
| } |
| |
| void logInner(long now, Object[] message) { |
| synchronized (mLock) { |
| openLogLocked(now); |
| if (mLogWriter == null) { |
| return; // Couldn't open log file? |
| } |
| |
| mStringBuilder.setLength(0); |
| mCachedDate.setTime(now); |
| mStringBuilder.append(sTimestampFormat.format(mCachedDate)); |
| mStringBuilder.append(' '); |
| |
| mStringBuilder.append(android.os.Process.myTid()); |
| mStringBuilder.append(' '); |
| |
| final int messageStart = mStringBuilder.length(); |
| |
| for (Object o : message) { |
| mStringBuilder.append(o); |
| } |
| mStringBuilder.append('\n'); |
| |
| try { |
| mLogWriter.append(mStringBuilder); |
| mLogWriter.flush(); |
| |
| // Also write on logcat. |
| if (DO_LOGCAT) { |
| Log.d(TAG, mStringBuilder.substring(messageStart)); |
| } |
| } catch (IOException e) { |
| handleException("Failed to write log", e); |
| } |
| } |
| } |
| |
| @GuardedBy("mLock") |
| private void openLogLocked(long now) { |
| // If we already have a log file opened and the date has't changed, just use it. |
| final long day = now % DateUtils.DAY_IN_MILLIS; |
| if ((mLogWriter != null) && (day == mCurrentLogFileDayTimestamp)) { |
| return; |
| } |
| |
| // Otherwise create a new log file. |
| closeCurrentLogLocked(); |
| |
| mCurrentLogFileDayTimestamp = day; |
| |
| mCachedDate.setTime(now); |
| final String filename = "synclog-" + sFilenameDateFormat.format(mCachedDate) + ".log"; |
| final File file = new File(mLogPath, filename); |
| |
| file.getParentFile().mkdirs(); |
| |
| try { |
| mLogWriter = new FileWriter(file, /* append= */ true); |
| } catch (IOException e) { |
| handleException("Failed to open log file: " + file, e); |
| } |
| } |
| |
| @GuardedBy("mLock") |
| private void closeCurrentLogLocked() { |
| IoUtils.closeQuietly(mLogWriter); |
| mLogWriter = null; |
| } |
| |
| @Override |
| public void purgeOldLogs() { |
| synchronized (mLock) { |
| FileUtils.deleteOlderFiles(mLogPath, /* keepCount= */ 1, mKeepAgeMs); |
| } |
| } |
| |
| @Override |
| public String jobParametersToString(JobParameters params) { |
| return SyncJobService.jobParametersToString(params); |
| } |
| |
| @Override |
| public void dumpAll(PrintWriter pw) { |
| synchronized (mLock) { |
| final String[] files = mLogPath.list(); |
| if (files == null || (files.length == 0)) { |
| return; |
| } |
| Arrays.sort(files); |
| |
| for (String file : files) { |
| dumpFile(pw, new File(mLogPath, file)); |
| } |
| } |
| } |
| |
| private void dumpFile(PrintWriter pw, File file) { |
| Slog.w(TAG, "Dumping " + file); |
| final char[] buffer = new char[32 * 1024]; |
| |
| try (Reader in = new BufferedReader(new FileReader(file))) { |
| int read; |
| while ((read = in.read(buffer)) >= 0) { |
| if (read > 0) { |
| pw.write(buffer, 0, read); |
| } |
| } |
| } catch (IOException e) { |
| } |
| } |
| |
| private class MyHandler extends Handler { |
| public static final int MSG_LOG_ID = 1; |
| |
| MyHandler(Looper looper) { |
| super(looper); |
| } |
| |
| public void log(long now, Object[] message) { |
| obtainMessage(MSG_LOG_ID, IntPair.first(now), IntPair.second(now), message) |
| .sendToTarget(); |
| } |
| |
| @Override |
| public void handleMessage(Message msg) { |
| switch (msg.what) { |
| case MSG_LOG_ID: { |
| logInner(IntPair.of(msg.arg1, msg.arg2), (Object[]) msg.obj); |
| break; |
| } |
| } |
| } |
| } |
| } |
| } |