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/*
* Copyright (C) 2015 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 com.android.loganalysis.parser;
import com.android.loganalysis.item.BatteryDischargeItem;
import com.android.loganalysis.item.BatteryDischargeItem.BatteryDischargeInfoItem;
import com.android.loganalysis.item.BatteryStatsSummaryInfoItem;
import com.android.loganalysis.util.NumberFormattingUtil;
import java.util.Calendar;
import java.util.GregorianCalendar;
import java.util.LinkedList;
import java.util.List;
import java.util.Queue;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* A {@link IParser} to parse batterystats summary
*/
public class BatteryStatsSummaryInfoParser implements IParser{
/**
* Matches: 0 (15) RESET:TIME: 2015-01-18-12-56-57
*/
private static final Pattern RESET_TIME_PATTERN = Pattern.compile("^\\s*"
+ "\\d\\s*\\(\\d+\\)\\s*RESET:TIME:\\s*(\\d+)-(\\d+)-(\\d+)-(\\d+)-(\\d+)-(\\d+)$");
/**
* Matches: +1d01h03m37s246ms (1) 028 c10400010 -running -wake_lock
*/
private static final Pattern BATTERY_DISCHARGE_PATTERN = Pattern.compile(
"^\\s*\\+(?:(\\d+)d)?(?:(\\d+)h)?(?:(\\d+)m)?(?:(\\d+)s)?(?:(\\d+)ms)? \\(\\d+\\) "
+ "(\\d+) \\w+ .*");
private BatteryDischargeItem mBatteryDischarge = new BatteryDischargeItem();
private BatteryStatsSummaryInfoItem mItem = new BatteryStatsSummaryInfoItem();
private long mBatteryDischargeRateAvg = 0;
private int mBatteryDischargeSamples = 0;
private Calendar mResetTime;
private static final int BATTERY_GROUP_LIMIT = 10;
/**
* {@inheritDoc}
*
* @return The {@link BatteryStatsSummaryInfoItem}.
*/
@Override
public BatteryStatsSummaryInfoItem parse(List<String> lines) {
Matcher resetTimeMatcher = null;
Matcher dischargeMatcher = null;
long previousDischargeElapsedTime= 0;
int previousBatteryLevel = 0;
boolean batteryDischargedFully = false;
for (String line : lines) {
resetTimeMatcher = RESET_TIME_PATTERN.matcher(line);
dischargeMatcher = BATTERY_DISCHARGE_PATTERN.matcher(line);
if (resetTimeMatcher.matches()) {
mResetTime = new GregorianCalendar();
final int year = Integer.parseInt(resetTimeMatcher.group(1));
final int month = Integer.parseInt(resetTimeMatcher.group(2));
final int day = Integer.parseInt(resetTimeMatcher.group(3));
final int hour = Integer.parseInt(resetTimeMatcher.group(4));
final int minute = Integer.parseInt(resetTimeMatcher.group(5));
final int second = Integer.parseInt(resetTimeMatcher.group(6));
// Calendar month is zero indexed but the parsed date is 1-12
mResetTime.set(year, (month - 1), day, hour, minute, second);
} else if (dischargeMatcher.matches()) {
final int days = NumberFormattingUtil.parseIntOrZero(dischargeMatcher.group(1));
final int hours = NumberFormattingUtil.parseIntOrZero(dischargeMatcher.group(2));
final int mins = NumberFormattingUtil.parseIntOrZero(dischargeMatcher.group(3));
final int secs = NumberFormattingUtil.parseIntOrZero(dischargeMatcher.group(4));
final int msecs = NumberFormattingUtil.parseIntOrZero(dischargeMatcher.group(5));
final int batteryLevel = Integer.parseInt(dischargeMatcher.group(6));
if (batteryLevel == 0) {
// Ignore the subsequent battery drop readings
batteryDischargedFully = true;
continue;
} else if (previousBatteryLevel == 0) {
// Ignore the first drop
previousBatteryLevel = batteryLevel;
continue;
} else if (!batteryDischargedFully && previousBatteryLevel != batteryLevel) {
long elapsedTime = NumberFormattingUtil.getMs(days, hours, mins, secs, msecs);
mBatteryDischargeRateAvg += (elapsedTime - previousDischargeElapsedTime);
mBatteryDischargeSamples++;
mBatteryDischarge.addBatteryDischargeInfo(
getDischargeClockTime(days, hours, mins, secs),
(elapsedTime - previousDischargeElapsedTime), batteryLevel);
previousDischargeElapsedTime = elapsedTime;
previousBatteryLevel = batteryLevel;
}
}
}
mItem.setBatteryDischargeRate(getAverageDischargeRate());
mItem.setPeakDischargeTime(getPeakDischargeTime());
return mItem;
}
private Calendar getDischargeClockTime(int days, int hours, int mins, int secs) {
Calendar dischargeClockTime = new GregorianCalendar();
dischargeClockTime.setTime(mResetTime.getTime());
dischargeClockTime.add(Calendar.DATE, days);
dischargeClockTime.add(Calendar.HOUR, hours);
dischargeClockTime.add(Calendar.MINUTE, mins);
dischargeClockTime.add(Calendar.SECOND, secs);
return dischargeClockTime;
}
private String getAverageDischargeRate() {
if (mBatteryDischargeSamples == 0) {
return "The battery did not discharge";
}
final long minsPerLevel = mBatteryDischargeRateAvg / (mBatteryDischargeSamples * 60 * 1000);
return String.format("The battery dropped a level %d mins on average", minsPerLevel);
}
private String getPeakDischargeTime() {
int peakDischargeStartBatteryLevel = 0, peakDischargeStopBatteryLevel = 0;
long minDischargeDuration = 0;
Calendar peakDischargeStartTime= null, peakDischargeStopTime = null;
Queue <BatteryDischargeInfoItem> batteryDischargeWindow =
new LinkedList <BatteryDischargeInfoItem>();
long sumDischargeDuration = 0;
for (BatteryDischargeInfoItem dischargeSteps : mBatteryDischarge.getDischargeStepsInfo()) {
batteryDischargeWindow.add(dischargeSteps);
sumDischargeDuration += dischargeSteps.getElapsedTime();
if (batteryDischargeWindow.size() >= BATTERY_GROUP_LIMIT) {
final long averageDischargeDuration = sumDischargeDuration/BATTERY_GROUP_LIMIT;
final BatteryDischargeInfoItem startNode = batteryDischargeWindow.remove();
sumDischargeDuration -= startNode.getElapsedTime();
if (minDischargeDuration == 0 || averageDischargeDuration < minDischargeDuration) {
minDischargeDuration = averageDischargeDuration;
peakDischargeStartBatteryLevel = startNode.getBatteryLevel();
peakDischargeStopBatteryLevel = dischargeSteps.getBatteryLevel();
peakDischargeStartTime = startNode.getClockTime();
peakDischargeStopTime = dischargeSteps.getClockTime();
}
}
}
if (peakDischargeStartTime != null && peakDischargeStopTime != null &&
peakDischargeStartBatteryLevel > 0 && peakDischargeStopBatteryLevel > 0) {
return String.format(
"The peak discharge time was during %s to %s where battery dropped from %d to "
+ "%d", peakDischargeStartTime.getTime().toString(),
peakDischargeStopTime.getTime().toString(), peakDischargeStartBatteryLevel,
peakDischargeStopBatteryLevel);
} else {
return "The battery did not discharge";
}
}
/**
* Get the {@link BatteryStatsSummaryInfoItem}.
* <p>
* Exposed for unit testing.
* </p>
*/
BatteryStatsSummaryInfoItem getItem() {
return mItem;
}
}
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