Jeff Sharkey | 9a13f36 | 2011-04-26 16:25:36 -0700 | [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 android.net; |
| 18 | |
| 19 | import android.os.Parcel; |
| 20 | import android.os.Parcelable; |
| 21 | import android.os.SystemClock; |
| 22 | |
| 23 | import java.io.CharArrayWriter; |
| 24 | import java.io.PrintWriter; |
| 25 | |
| 26 | /** |
| 27 | * Collection of network statistics. Can contain summary details across all |
| 28 | * interfaces, or details with per-UID granularity. Designed to parcel quickly |
| 29 | * across process boundaries. |
| 30 | * |
| 31 | * @hide |
| 32 | */ |
| 33 | public class NetworkStats implements Parcelable { |
| 34 | /** {@link #iface} value when entry is summarized over all interfaces. */ |
| 35 | public static final String IFACE_ALL = null; |
| 36 | /** {@link #uid} value when entry is summarized over all UIDs. */ |
| 37 | public static final int UID_ALL = 0; |
| 38 | |
| 39 | /** |
| 40 | * {@link SystemClock#elapsedRealtime()} timestamp when this data was |
| 41 | * generated. |
| 42 | */ |
| 43 | public final long elapsedRealtime; |
| 44 | public final String[] iface; |
| 45 | public final int[] uid; |
| 46 | public final long[] rx; |
| 47 | public final long[] tx; |
| 48 | |
| 49 | // TODO: add fg/bg stats and tag granularity |
| 50 | |
| 51 | private NetworkStats(long elapsedRealtime, String[] iface, int[] uid, long[] rx, long[] tx) { |
| 52 | this.elapsedRealtime = elapsedRealtime; |
| 53 | this.iface = iface; |
| 54 | this.uid = uid; |
| 55 | this.rx = rx; |
| 56 | this.tx = tx; |
| 57 | } |
| 58 | |
| 59 | public NetworkStats(Parcel parcel) { |
| 60 | elapsedRealtime = parcel.readLong(); |
| 61 | iface = parcel.createStringArray(); |
| 62 | uid = parcel.createIntArray(); |
| 63 | rx = parcel.createLongArray(); |
| 64 | tx = parcel.createLongArray(); |
| 65 | } |
| 66 | |
| 67 | public static class Builder { |
| 68 | private long mElapsedRealtime; |
| 69 | private final String[] mIface; |
| 70 | private final int[] mUid; |
| 71 | private final long[] mRx; |
| 72 | private final long[] mTx; |
| 73 | |
| 74 | private int mIndex = 0; |
| 75 | |
| 76 | public Builder(long elapsedRealtime, int size) { |
| 77 | mElapsedRealtime = elapsedRealtime; |
| 78 | mIface = new String[size]; |
| 79 | mUid = new int[size]; |
| 80 | mRx = new long[size]; |
| 81 | mTx = new long[size]; |
| 82 | } |
| 83 | |
| 84 | public void addEntry(String iface, int uid, long rx, long tx) { |
| 85 | mIface[mIndex] = iface; |
| 86 | mUid[mIndex] = uid; |
| 87 | mRx[mIndex] = rx; |
| 88 | mTx[mIndex] = tx; |
| 89 | mIndex++; |
| 90 | } |
| 91 | |
| 92 | public NetworkStats build() { |
| 93 | if (mIndex != mIface.length) { |
| 94 | throw new IllegalArgumentException("unexpected number of entries"); |
| 95 | } |
| 96 | return new NetworkStats(mElapsedRealtime, mIface, mUid, mRx, mTx); |
| 97 | } |
| 98 | } |
| 99 | |
| 100 | /** |
| 101 | * Find first stats index that matches the requested parameters. |
| 102 | */ |
| 103 | public int findIndex(String iface, int uid) { |
| 104 | for (int i = 0; i < this.iface.length; i++) { |
| 105 | if (equal(iface, this.iface[i]) && uid == this.uid[i]) { |
| 106 | return i; |
| 107 | } |
| 108 | } |
| 109 | return -1; |
| 110 | } |
| 111 | |
| 112 | private static boolean equal(Object a, Object b) { |
| 113 | return a == b || (a != null && a.equals(b)); |
| 114 | } |
| 115 | |
| 116 | /** {@inheritDoc} */ |
| 117 | public int describeContents() { |
| 118 | return 0; |
| 119 | } |
| 120 | |
| 121 | public void dump(String prefix, PrintWriter pw) { |
| 122 | pw.print(prefix); |
| 123 | pw.print("NetworkStats: elapsedRealtime="); pw.println(elapsedRealtime); |
| 124 | for (int i = 0; i < iface.length; i++) { |
| 125 | pw.print(prefix); |
| 126 | pw.print(" iface="); pw.print(iface[i]); |
| 127 | pw.print(" uid="); pw.print(uid[i]); |
| 128 | pw.print(" rx="); pw.print(rx[i]); |
| 129 | pw.print(" tx="); pw.println(tx[i]); |
| 130 | } |
| 131 | } |
| 132 | |
| 133 | @Override |
| 134 | public String toString() { |
| 135 | final CharArrayWriter writer = new CharArrayWriter(); |
| 136 | dump("", new PrintWriter(writer)); |
| 137 | return writer.toString(); |
| 138 | } |
| 139 | |
| 140 | /** {@inheritDoc} */ |
| 141 | public void writeToParcel(Parcel dest, int flags) { |
| 142 | dest.writeLong(elapsedRealtime); |
| 143 | dest.writeStringArray(iface); |
| 144 | dest.writeIntArray(uid); |
| 145 | dest.writeLongArray(rx); |
| 146 | dest.writeLongArray(tx); |
| 147 | } |
| 148 | |
| 149 | public static final Creator<NetworkStats> CREATOR = new Creator<NetworkStats>() { |
| 150 | public NetworkStats createFromParcel(Parcel in) { |
| 151 | return new NetworkStats(in); |
| 152 | } |
| 153 | |
| 154 | public NetworkStats[] newArray(int size) { |
| 155 | return new NetworkStats[size]; |
| 156 | } |
| 157 | }; |
| 158 | } |