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/*
* Copyright (c) 2012-2017 Arne Schwabe
* Distributed under the GNU GPL v2 with additional terms. For full terms see the file doc/LICENSE.txt
*/
package de.blinkt.openvpn.core;
import android.os.Parcel;
import android.os.Parcelable;
import java.util.HashSet;
import java.util.LinkedList;
import java.util.Vector;
import static java.lang.Math.max;
/**
* Created by arne on 23.05.17.
*/
public class TrafficHistory implements Parcelable {
public static final long PERIODS_TO_KEEP = 5;
public static final int TIME_PERIOD_MINTUES = 60 * 1000;
public static final int TIME_PERIOD_HOURS = 3600 * 1000;
private LinkedList<TrafficDatapoint> trafficHistorySeconds = new LinkedList<>();
private LinkedList<TrafficDatapoint> trafficHistoryMinutes = new LinkedList<>();
private LinkedList<TrafficDatapoint> trafficHistoryHours = new LinkedList<>();
private TrafficDatapoint lastSecondUsedForMinute;
private TrafficDatapoint lastMinuteUsedForHours;
public TrafficHistory() {
}
protected TrafficHistory(Parcel in) {
in.readList(trafficHistorySeconds, getClass().getClassLoader());
in.readList(trafficHistoryMinutes, getClass().getClassLoader());
in.readList(trafficHistoryHours, getClass().getClassLoader());
lastSecondUsedForMinute = in.readParcelable(getClass().getClassLoader());
lastMinuteUsedForHours = in.readParcelable(getClass().getClassLoader());
}
public static final Creator<TrafficHistory> CREATOR = new Creator<TrafficHistory>() {
@Override
public TrafficHistory createFromParcel(Parcel in) {
return new TrafficHistory(in);
}
@Override
public TrafficHistory[] newArray(int size) {
return new TrafficHistory[size];
}
};
public LastDiff getLastDiff(TrafficDatapoint tdp) {
TrafficDatapoint lasttdp;
if (trafficHistorySeconds.size() == 0)
lasttdp = new TrafficDatapoint(0, 0, System.currentTimeMillis());
else
lasttdp = trafficHistorySeconds.getLast();
if (tdp == null) {
tdp = lasttdp;
if (trafficHistorySeconds.size() < 2)
lasttdp = tdp;
else {
trafficHistorySeconds.descendingIterator().next();
tdp = trafficHistorySeconds.descendingIterator().next();
}
}
return new LastDiff(lasttdp, tdp);
}
@Override
public int describeContents() {
return 0;
}
@Override
public void writeToParcel(Parcel dest, int flags) {
dest.writeList(trafficHistorySeconds);
dest.writeList(trafficHistoryMinutes);
dest.writeList(trafficHistoryHours);
dest.writeParcelable(lastSecondUsedForMinute, 0);
dest.writeParcelable(lastMinuteUsedForHours, 0);
}
public LinkedList<TrafficDatapoint> getHours() {
return trafficHistoryHours;
}
public LinkedList<TrafficDatapoint> getMinutes() {
return trafficHistoryMinutes;
}
public LinkedList<TrafficDatapoint> getSeconds() {
return trafficHistorySeconds;
}
public static LinkedList<TrafficDatapoint> getDummyList() {
LinkedList<TrafficDatapoint> list = new LinkedList<>();
list.add(new TrafficDatapoint(0, 0, System.currentTimeMillis()));
return list;
}
public static class TrafficDatapoint implements Parcelable {
private TrafficDatapoint(long inBytes, long outBytes, long timestamp) {
this.in = inBytes;
this.out = outBytes;
this.timestamp = timestamp;
}
public final long timestamp;
public final long in;
public final long out;
private TrafficDatapoint(Parcel in) {
timestamp = in.readLong();
this.in = in.readLong();
out = in.readLong();
}
public static final Creator<TrafficDatapoint> CREATOR = new Creator<TrafficDatapoint>() {
@Override
public TrafficDatapoint createFromParcel(Parcel in) {
return new TrafficDatapoint(in);
}
@Override
public TrafficDatapoint[] newArray(int size) {
return new TrafficDatapoint[size];
}
};
@Override
public int describeContents() {
return 0;
}
@Override
public void writeToParcel(Parcel dest, int flags) {
dest.writeLong(timestamp);
dest.writeLong(in);
dest.writeLong(out);
}
}
LastDiff add(long in, long out) {
TrafficDatapoint tdp = new TrafficDatapoint(in, out, System.currentTimeMillis());
LastDiff diff = getLastDiff(tdp);
addDataPoint(tdp);
return diff;
}
private void addDataPoint(TrafficDatapoint tdp) {
trafficHistorySeconds.add(tdp);
if (lastSecondUsedForMinute == null) {
lastSecondUsedForMinute = new TrafficDatapoint(0, 0, 0);
lastMinuteUsedForHours = new TrafficDatapoint(0, 0, 0);
}
removeAndAverage(tdp, true);
}
private void removeAndAverage(TrafficDatapoint newTdp, boolean seconds) {
HashSet<TrafficDatapoint> toRemove = new HashSet<>();
Vector<TrafficDatapoint> toAverage = new Vector<>();
long timePeriod;
LinkedList<TrafficDatapoint> tpList, nextList;
TrafficDatapoint lastTsPeriod;
if (seconds) {
timePeriod = TIME_PERIOD_MINTUES;
tpList = trafficHistorySeconds;
nextList = trafficHistoryMinutes;
lastTsPeriod = lastSecondUsedForMinute;
} else {
timePeriod = TIME_PERIOD_HOURS;
tpList = trafficHistoryMinutes;
nextList = trafficHistoryHours;
lastTsPeriod = lastMinuteUsedForHours;
}
if (newTdp.timestamp / timePeriod > (lastTsPeriod.timestamp / timePeriod)) {
nextList.add(newTdp);
if (seconds) {
lastSecondUsedForMinute = newTdp;
removeAndAverage(newTdp, false);
} else
lastMinuteUsedForHours = newTdp;
for (TrafficDatapoint tph : tpList) {
// List is iteratered from oldest to newest, remembert first one that we did not
if ((newTdp.timestamp - tph.timestamp) / timePeriod >= PERIODS_TO_KEEP)
toRemove.add(tph);
}
tpList.removeAll(toRemove);
}
}
static class LastDiff {
final private TrafficDatapoint tdp;
final private TrafficDatapoint lasttdp;
private LastDiff(TrafficDatapoint lasttdp, TrafficDatapoint tdp) {
this.lasttdp = lasttdp;
this.tdp = tdp;
}
public long getDiffOut() {
return max(0, tdp.out - lasttdp.out);
}
public long getDiffIn() {
return max(0, tdp.in - lasttdp.in);
}
public long getIn() {
return tdp.in;
}
public long getOut() {
return tdp.out;
}
}
}
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