| /* |
| * Copyright (C) 2006 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 android.util; |
| |
| import java.io.FileDescriptor; |
| import java.io.PrintWriter; |
| import java.util.Calendar; |
| import java.util.Iterator; |
| import java.util.LinkedList; |
| |
| /** |
| * @hide |
| */ |
| public final class LocalLog { |
| |
| private LinkedList<String> mLog; |
| private int mMaxLines; |
| private long mNow; |
| |
| public LocalLog(int maxLines) { |
| mLog = new LinkedList<String>(); |
| mMaxLines = maxLines; |
| } |
| |
| public synchronized void log(String msg) { |
| if (mMaxLines > 0) { |
| mNow = System.currentTimeMillis(); |
| StringBuilder sb = new StringBuilder(); |
| Calendar c = Calendar.getInstance(); |
| c.setTimeInMillis(mNow); |
| sb.append(String.format("%tm-%td %tH:%tM:%tS.%tL", c, c, c, c, c, c)); |
| mLog.add(sb.toString() + " - " + msg); |
| while (mLog.size() > mMaxLines) mLog.remove(); |
| } |
| } |
| |
| public synchronized void dump(FileDescriptor fd, PrintWriter pw, String[] args) { |
| Iterator<String> itr = mLog.listIterator(0); |
| while (itr.hasNext()) { |
| pw.println(itr.next()); |
| } |
| } |
| |
| public synchronized void reverseDump(FileDescriptor fd, PrintWriter pw, String[] args) { |
| for (int i = mLog.size() - 1; i >= 0; i--) { |
| pw.println(mLog.get(i)); |
| } |
| } |
| |
| public static class ReadOnlyLocalLog { |
| private final LocalLog mLog; |
| ReadOnlyLocalLog(LocalLog log) { |
| mLog = log; |
| } |
| public void dump(FileDescriptor fd, PrintWriter pw, String[] args) { |
| mLog.dump(fd, pw, args); |
| } |
| } |
| |
| public ReadOnlyLocalLog readOnlyLocalLog() { |
| return new ReadOnlyLocalLog(this); |
| } |
| } |