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/*
* Copyright (C) 2017 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.car.storagemonitoring;
import android.annotation.SystemApi;
import android.car.storagemonitoring.IoStatsEntry.Metrics;
import android.os.Parcel;
import android.os.Parcelable;
import android.util.JsonWriter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Objects;
import java.util.StringJoiner;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
/**
* Delta of uid_io stats taken at a sample point.
*
* @hide
*/
@SystemApi
public class IoStats implements Parcelable {
public static final Creator<IoStats> CREATOR = new Creator<IoStats>() {
@Override
public IoStats createFromParcel(Parcel in) {
return new IoStats(in);
}
@Override
public IoStats[] newArray(int size) {
return new IoStats[size];
}
};
private final List<IoStatsEntry> mStats;
private final long mUptimeTimestamp;
public IoStats(List<IoStatsEntry> stats, long timestamp) {
mStats = stats;
mUptimeTimestamp = timestamp;
}
public IoStats(Parcel in) {
mStats = in.createTypedArrayList(IoStatsEntry.CREATOR);
mUptimeTimestamp = in.readLong();
}
public IoStats(JSONObject in) throws JSONException {
mUptimeTimestamp = in.getInt("uptime");
JSONArray statsArray = in.getJSONArray("stats");
mStats = new ArrayList<>();
for(int i = 0; i < statsArray.length(); ++i) {
mStats.add(new IoStatsEntry(statsArray.getJSONObject(i)));
}
}
@Override
public void writeToParcel(Parcel dest, int flags) {
dest.writeTypedList(mStats);
dest.writeLong(mUptimeTimestamp);
}
public void writeToJson(JsonWriter jsonWriter) throws IOException {
jsonWriter.beginObject();
jsonWriter.name("uptime").value(mUptimeTimestamp);
jsonWriter.name("stats").beginArray();
for (IoStatsEntry stat : mStats) {
stat.writeToJson(jsonWriter);
}
jsonWriter.endArray();
jsonWriter.endObject();
}
@Override
public int describeContents() {
return 0;
}
public long getTimestamp() {
return mUptimeTimestamp;
}
public List<IoStatsEntry> getStats() {
return mStats;
}
@Override
public int hashCode() {
return Objects.hash(mStats, mUptimeTimestamp);
}
public IoStatsEntry getUserIdStats(int uid) {
for (IoStatsEntry stats : getStats()) {
if (stats.uid == uid) {
return stats;
}
}
return null;
}
public IoStatsEntry.Metrics getForegroundTotals() {
long bytesRead = 0;
long bytesWritten = 0;
long bytesReadFromStorage = 0;
long bytesWrittenToStorage = 0;
long fsyncCalls = 0;
for (IoStatsEntry stats : getStats()) {
bytesRead += stats.foreground.bytesRead;
bytesWritten += stats.foreground.bytesWritten;
bytesReadFromStorage += stats.foreground.bytesReadFromStorage;
bytesWrittenToStorage += stats.foreground.bytesWrittenToStorage;
fsyncCalls += stats.foreground.fsyncCalls;
}
return new Metrics(bytesRead,
bytesWritten,
bytesReadFromStorage,
bytesWrittenToStorage,
fsyncCalls);
}
public IoStatsEntry.Metrics getBackgroundTotals() {
long bytesRead = 0;
long bytesWritten = 0;
long bytesReadFromStorage = 0;
long bytesWrittenToStorage = 0;
long fsyncCalls = 0;
for (IoStatsEntry stats : getStats()) {
bytesRead += stats.background.bytesRead;
bytesWritten += stats.background.bytesWritten;
bytesReadFromStorage += stats.background.bytesReadFromStorage;
bytesWrittenToStorage += stats.background.bytesWrittenToStorage;
fsyncCalls += stats.background.fsyncCalls;
}
return new Metrics(bytesRead,
bytesWritten,
bytesReadFromStorage,
bytesWrittenToStorage,
fsyncCalls);
}
public IoStatsEntry.Metrics getTotals() {
IoStatsEntry.Metrics foreground = getForegroundTotals();
IoStatsEntry.Metrics background = getBackgroundTotals();
return new IoStatsEntry.Metrics(foreground.bytesRead + background.bytesRead,
foreground.bytesWritten + background.bytesWritten,
foreground.bytesReadFromStorage + background.bytesReadFromStorage,
foreground.bytesWrittenToStorage + background.bytesWrittenToStorage,
foreground.fsyncCalls + background.fsyncCalls);
}
@Override
public boolean equals(Object other) {
if (other instanceof IoStats) {
IoStats delta = (IoStats)other;
return delta.getTimestamp() == getTimestamp() &&
delta.getStats().equals(getStats());
}
return false;
}
@Override
public String toString() {
StringJoiner stringJoiner = new StringJoiner(", ");
for (IoStatsEntry stats : getStats()) {
stringJoiner.add(stats.toString());
}
return "timestamp = " + getTimestamp() + ", stats = " + stringJoiner.toString();
}
}
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