Robert Greenwalt | 470fd72 | 2012-01-18 12:51:15 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2006 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package android.util; |
| 18 | |
Mathew Inwood | b407568 | 2018-08-14 17:32:44 +0100 | [diff] [blame] | 19 | import android.annotation.UnsupportedAppUsage; |
Hugo Benichi | d7be4c7 | 2018-12-17 10:52:17 +0900 | [diff] [blame] | 20 | |
Robert Greenwalt | 470fd72 | 2012-01-18 12:51:15 -0800 | [diff] [blame] | 21 | import java.io.FileDescriptor; |
| 22 | import java.io.PrintWriter; |
Narayan Kamath | 6229d99 | 2017-06-09 13:35:48 +0100 | [diff] [blame] | 23 | import java.time.LocalDateTime; |
Hugo Benichi | de310db | 2016-10-04 11:36:11 +0900 | [diff] [blame] | 24 | import java.util.ArrayDeque; |
Narayan Kamath | 6229d99 | 2017-06-09 13:35:48 +0100 | [diff] [blame] | 25 | import java.util.Deque; |
| 26 | import java.util.Iterator; |
Robert Greenwalt | 470fd72 | 2012-01-18 12:51:15 -0800 | [diff] [blame] | 27 | |
| 28 | /** |
| 29 | * @hide |
| 30 | */ |
| 31 | public final class LocalLog { |
| 32 | |
Hugo Benichi | de310db | 2016-10-04 11:36:11 +0900 | [diff] [blame] | 33 | private final Deque<String> mLog; |
| 34 | private final int mMaxLines; |
Robert Greenwalt | 470fd72 | 2012-01-18 12:51:15 -0800 | [diff] [blame] | 35 | |
Mathew Inwood | b407568 | 2018-08-14 17:32:44 +0100 | [diff] [blame] | 36 | @UnsupportedAppUsage |
Robert Greenwalt | 470fd72 | 2012-01-18 12:51:15 -0800 | [diff] [blame] | 37 | public LocalLog(int maxLines) { |
Hugo Benichi | de310db | 2016-10-04 11:36:11 +0900 | [diff] [blame] | 38 | mMaxLines = Math.max(0, maxLines); |
| 39 | mLog = new ArrayDeque<>(mMaxLines); |
Robert Greenwalt | 470fd72 | 2012-01-18 12:51:15 -0800 | [diff] [blame] | 40 | } |
| 41 | |
Mathew Inwood | b407568 | 2018-08-14 17:32:44 +0100 | [diff] [blame] | 42 | @UnsupportedAppUsage |
Hugo Benichi | de310db | 2016-10-04 11:36:11 +0900 | [diff] [blame] | 43 | public void log(String msg) { |
| 44 | if (mMaxLines <= 0) { |
| 45 | return; |
Robert Greenwalt | 470fd72 | 2012-01-18 12:51:15 -0800 | [diff] [blame] | 46 | } |
Narayan Kamath | 6229d99 | 2017-06-09 13:35:48 +0100 | [diff] [blame] | 47 | append(String.format("%s - %s", LocalDateTime.now(), msg)); |
Hugo Benichi | de310db | 2016-10-04 11:36:11 +0900 | [diff] [blame] | 48 | } |
| 49 | |
| 50 | private synchronized void append(String logLine) { |
| 51 | while (mLog.size() >= mMaxLines) { |
| 52 | mLog.remove(); |
| 53 | } |
| 54 | mLog.add(logLine); |
Robert Greenwalt | 470fd72 | 2012-01-18 12:51:15 -0800 | [diff] [blame] | 55 | } |
| 56 | |
Mathew Inwood | b407568 | 2018-08-14 17:32:44 +0100 | [diff] [blame] | 57 | @UnsupportedAppUsage |
Robert Greenwalt | 470fd72 | 2012-01-18 12:51:15 -0800 | [diff] [blame] | 58 | public synchronized void dump(FileDescriptor fd, PrintWriter pw, String[] args) { |
Hugo Benichi | d7be4c7 | 2018-12-17 10:52:17 +0900 | [diff] [blame] | 59 | dump(pw); |
| 60 | } |
| 61 | |
| 62 | public synchronized void dump(PrintWriter pw) { |
Hugo Benichi | de310db | 2016-10-04 11:36:11 +0900 | [diff] [blame] | 63 | Iterator<String> itr = mLog.iterator(); |
Robert Greenwalt | 470fd72 | 2012-01-18 12:51:15 -0800 | [diff] [blame] | 64 | while (itr.hasNext()) { |
| 65 | pw.println(itr.next()); |
| 66 | } |
| 67 | } |
Robert Greenwalt | 22b4c6a | 2015-06-23 15:03:33 -0700 | [diff] [blame] | 68 | |
Erik Kline | 7523eb3 | 2015-07-09 18:24:03 +0900 | [diff] [blame] | 69 | public synchronized void reverseDump(FileDescriptor fd, PrintWriter pw, String[] args) { |
Hugo Benichi | d7be4c7 | 2018-12-17 10:52:17 +0900 | [diff] [blame] | 70 | reverseDump(pw); |
| 71 | } |
| 72 | |
| 73 | public synchronized void reverseDump(PrintWriter pw) { |
Hugo Benichi | de310db | 2016-10-04 11:36:11 +0900 | [diff] [blame] | 74 | Iterator<String> itr = mLog.descendingIterator(); |
| 75 | while (itr.hasNext()) { |
| 76 | pw.println(itr.next()); |
Erik Kline | 7523eb3 | 2015-07-09 18:24:03 +0900 | [diff] [blame] | 77 | } |
| 78 | } |
| 79 | |
Robert Greenwalt | 22b4c6a | 2015-06-23 15:03:33 -0700 | [diff] [blame] | 80 | public static class ReadOnlyLocalLog { |
| 81 | private final LocalLog mLog; |
| 82 | ReadOnlyLocalLog(LocalLog log) { |
| 83 | mLog = log; |
| 84 | } |
Mathew Inwood | b407568 | 2018-08-14 17:32:44 +0100 | [diff] [blame] | 85 | @UnsupportedAppUsage |
Robert Greenwalt | 22b4c6a | 2015-06-23 15:03:33 -0700 | [diff] [blame] | 86 | public void dump(FileDescriptor fd, PrintWriter pw, String[] args) { |
Hugo Benichi | d7be4c7 | 2018-12-17 10:52:17 +0900 | [diff] [blame] | 87 | mLog.dump(pw); |
| 88 | } |
| 89 | public void dump(PrintWriter pw) { |
| 90 | mLog.dump(pw); |
Robert Greenwalt | 22b4c6a | 2015-06-23 15:03:33 -0700 | [diff] [blame] | 91 | } |
Hugo Benichi | de310db | 2016-10-04 11:36:11 +0900 | [diff] [blame] | 92 | public void reverseDump(FileDescriptor fd, PrintWriter pw, String[] args) { |
Hugo Benichi | d7be4c7 | 2018-12-17 10:52:17 +0900 | [diff] [blame] | 93 | mLog.reverseDump(pw); |
| 94 | } |
| 95 | public void reverseDump(PrintWriter pw) { |
| 96 | mLog.reverseDump(pw); |
Hugo Benichi | de310db | 2016-10-04 11:36:11 +0900 | [diff] [blame] | 97 | } |
Robert Greenwalt | 22b4c6a | 2015-06-23 15:03:33 -0700 | [diff] [blame] | 98 | } |
| 99 | |
Mathew Inwood | b407568 | 2018-08-14 17:32:44 +0100 | [diff] [blame] | 100 | @UnsupportedAppUsage |
Robert Greenwalt | 22b4c6a | 2015-06-23 15:03:33 -0700 | [diff] [blame] | 101 | public ReadOnlyLocalLog readOnlyLocalLog() { |
| 102 | return new ReadOnlyLocalLog(this); |
| 103 | } |
Robert Greenwalt | 470fd72 | 2012-01-18 12:51:15 -0800 | [diff] [blame] | 104 | } |