2 * Copyright (C) 2016 The Android Open Source Project
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
8 * http://www.apache.org/licenses/LICENSE-2.0
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.
17 package android.net.metrics;
19 import android.annotation.SystemApi;
20 import android.os.Parcel;
21 import android.os.Parcelable;
27 final public class DnsEvent extends IpConnectivityEvent implements Parcelable {
28 public final int netId;
30 // The event type is currently only 1 or 2, so we store it as a byte.
31 public final byte[] eventTypes;
32 // Current getaddrinfo codes go from 1 to EAI_MAX = 15. gethostbyname returns errno, but there
33 // are fewer than 255 errno values. So we store the result code in a byte as well.
34 public final byte[] returnCodes;
35 // The latency is an integer because a) short arrays aren't parcelable and b) a short can only
36 // store a maximum latency of 32757 or 65535 ms, which is too short for pathologically slow
38 public final int[] latenciesMs;
40 private DnsEvent(int netId, byte[] eventTypes, byte[] returnCodes, int[] latenciesMs) {
42 this.eventTypes = eventTypes;
43 this.returnCodes = returnCodes;
44 this.latenciesMs = latenciesMs;
47 private DnsEvent(Parcel in) {
48 this.netId = in.readInt();
49 this.eventTypes = in.createByteArray();
50 this.returnCodes = in.createByteArray();
51 this.latenciesMs = in.createIntArray();
55 public void writeToParcel(Parcel out, int flags) {
57 out.writeByteArray(eventTypes);
58 out.writeByteArray(returnCodes);
59 out.writeIntArray(latenciesMs);
62 public int describeContents() {
67 public String toString() {
68 return String.format("DnsEvent(%d, %d events)", netId, eventTypes.length);
71 public static final Parcelable.Creator<DnsEvent> CREATOR = new Parcelable.Creator<DnsEvent>() {
73 public DnsEvent createFromParcel(Parcel in) {
74 return new DnsEvent(in);
78 public DnsEvent[] newArray(int size) {
79 return new DnsEvent[size];
83 public static void logEvent(
84 int netId, byte[] eventTypes, byte[] returnCodes, int[] latenciesMs) {
85 logEvent(new DnsEvent(netId, eventTypes, returnCodes, latenciesMs));