Jean-Baptiste Queru | d56b88a | 2012-11-07 07:48:57 -0800 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (C) 2011 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 com.android.volley; |
| 18 | |
| 19 | import android.os.SystemClock; |
| 20 | import android.util.Log; |
| 21 | |
| 22 | import java.util.ArrayList; |
| 23 | import java.util.List; |
| 24 | import java.util.Locale; |
| 25 | |
| 26 | /** Logging helper class. */ |
| 27 | public class VolleyLog { |
| 28 | public static String TAG = "Volley"; |
| 29 | |
| 30 | public static final boolean DEBUG = Log.isLoggable(TAG, Log.VERBOSE); |
| 31 | |
| 32 | public static void v(String format, Object... args) { |
| 33 | if (DEBUG) { |
| 34 | Log.v(TAG, buildMessage(format, args)); |
| 35 | } |
| 36 | } |
| 37 | |
| 38 | public static void d(String format, Object... args) { |
| 39 | Log.d(TAG, buildMessage(format, args)); |
| 40 | } |
| 41 | |
| 42 | public static void e(String format, Object... args) { |
| 43 | Log.e(TAG, buildMessage(format, args)); |
| 44 | } |
| 45 | |
| 46 | public static void wtf(String format, Object... args) { |
| 47 | Log.wtf(TAG, buildMessage(format, args)); |
| 48 | } |
| 49 | |
| 50 | public static void wtf(Throwable tr, String format, Object... args) { |
| 51 | Log.wtf(TAG, buildMessage(format, args), tr); |
| 52 | } |
| 53 | |
| 54 | /** |
| 55 | * Formats the caller's provided message and prepends useful info like |
| 56 | * calling thread ID and method name. |
| 57 | */ |
| 58 | private static String buildMessage(String format, Object... args) { |
| 59 | String msg = (args == null) ? format : String.format(Locale.US, format, args); |
| 60 | StackTraceElement[] trace = new Throwable().fillInStackTrace().getStackTrace(); |
| 61 | |
| 62 | String caller = "<unknown>"; |
| 63 | // Walk up the stack looking for the first caller outside of VolleyLog. |
| 64 | // It will be at least two frames up, so start there. |
| 65 | for (int i = 2; i < trace.length; i++) { |
| 66 | Class<?> clazz = trace[i].getClass(); |
| 67 | if (!clazz.equals(VolleyLog.class)) { |
| 68 | String callingClass = trace[i].getClassName(); |
| 69 | callingClass = callingClass.substring(callingClass.lastIndexOf('.') + 1); |
| 70 | callingClass = callingClass.substring(callingClass.lastIndexOf('$') + 1); |
| 71 | |
| 72 | caller = callingClass + "." + trace[i].getMethodName(); |
| 73 | break; |
| 74 | } |
| 75 | } |
| 76 | return String.format(Locale.US, "[%d] %s: %s", |
| 77 | Thread.currentThread().getId(), caller, msg); |
| 78 | } |
| 79 | |
| 80 | /** |
| 81 | * A simple event log with records containing a name, thread ID, and timestamp. |
| 82 | */ |
| 83 | static class MarkerLog { |
| 84 | public static final boolean ENABLED = VolleyLog.DEBUG; |
| 85 | |
| 86 | /** Minimum duration from first marker to last in an marker log to warrant logging. */ |
| 87 | private static final long MIN_DURATION_FOR_LOGGING_MS = 0; |
| 88 | |
| 89 | private static class Marker { |
| 90 | public final String name; |
| 91 | public final long thread; |
| 92 | public final long time; |
| 93 | |
| 94 | public Marker(String name, long thread, long time) { |
| 95 | this.name = name; |
| 96 | this.thread = thread; |
| 97 | this.time = time; |
| 98 | } |
| 99 | } |
| 100 | |
| 101 | private final List<Marker> mMarkers = new ArrayList<Marker>(); |
| 102 | private boolean mFinished = false; |
| 103 | |
| 104 | /** Adds a marker to this log with the specified name. */ |
| 105 | public synchronized void add(String name, long threadId) { |
| 106 | if (mFinished) { |
| 107 | throw new IllegalStateException("Marker added to finished log"); |
| 108 | } |
| 109 | |
| 110 | mMarkers.add(new Marker(name, threadId, SystemClock.elapsedRealtime())); |
| 111 | } |
| 112 | |
| 113 | /** |
| 114 | * Closes the log, dumping it to logcat if the time difference between |
| 115 | * the first and last markers is greater than {@link #MIN_DURATION_FOR_LOGGING_MS}. |
| 116 | * @param header Header string to print above the marker log. |
| 117 | */ |
| 118 | public synchronized void finish(String header) { |
| 119 | mFinished = true; |
| 120 | |
| 121 | long duration = getTotalDuration(); |
| 122 | if (duration <= MIN_DURATION_FOR_LOGGING_MS) { |
| 123 | return; |
| 124 | } |
| 125 | |
| 126 | long prevTime = mMarkers.get(0).time; |
| 127 | d("(%-4d ms) %s", duration, header); |
| 128 | for (Marker marker : mMarkers) { |
| 129 | long thisTime = marker.time; |
| 130 | d("(+%-4d) [%2d] %s", (thisTime - prevTime), marker.thread, marker.name); |
| 131 | prevTime = thisTime; |
| 132 | } |
| 133 | } |
| 134 | |
| 135 | @Override |
| 136 | protected void finalize() throws Throwable { |
| 137 | // Catch requests that have been collected (and hence end-of-lifed) |
| 138 | // but had no debugging output printed for them. |
| 139 | if (!mFinished) { |
| 140 | finish("Request on the loose"); |
| 141 | e("Marker log finalized without finish() - uncaught exit point for request"); |
| 142 | } |
| 143 | } |
| 144 | |
| 145 | /** Returns the time difference between the first and last events in this log. */ |
| 146 | private long getTotalDuration() { |
| 147 | if (mMarkers.size() == 0) { |
| 148 | return 0; |
| 149 | } |
| 150 | |
| 151 | long first = mMarkers.get(0).time; |
| 152 | long last = mMarkers.get(mMarkers.size() - 1).time; |
| 153 | return last - first; |
| 154 | } |
| 155 | } |
| 156 | } |