Home | History | Annotate | Download | only in parser 
      1 /*
      2  * Copyright (C) 2015 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 package com.android.loganalysis.parser;
     17 
     18 import com.android.loganalysis.item.ProcessUsageItem;
     19 import com.android.loganalysis.item.ProcessUsageItem.SensorInfoItem;
     20 import com.android.loganalysis.util.NumberFormattingUtil;
     21 
     22 import java.util.LinkedList;
     23 import java.util.List;
     24 import java.util.regex.Matcher;
     25 import java.util.regex.Pattern;
     26 
     27 /**
     28  * A {@link IParser} to handle the parsing of process usage information
     29  */
     30 public class ProcessUsageParser implements IParser {
     31 
     32     private ProcessUsageItem mItem = new ProcessUsageItem();
     33     private LinkedList<SensorInfoItem> mSensorUsage = new LinkedList<SensorInfoItem>();
     34 
     35     /**
     36      * Matches: 1000:
     37      */
     38     private static final Pattern UID_PATTERN = Pattern.compile("^\\s*(\\w+):$");
     39 
     40     /**
     41      * Matches: Sensor 1: 12m 52s 311ms realtime (29 times)
     42      */
     43     private static final Pattern SENSOR_PATTERN = Pattern.compile(
     44             "^\\s*Sensor (\\d+): (?:(\\d+)d\\s)?"
     45             + "(?:(\\d+)h\\s)?(?:(\\d+)m\\s)?(?:(\\d+)s\\s)?(\\d+)ms "
     46             + "realtime \\((\\d+) times\\)$");
     47 
     48     /**
     49      * Matches: 507 wakeup alarms
     50      */
     51     private static final Pattern ALARM_PATTERN = Pattern.compile("^\\s*(\\d+) wakeup alarms$");
     52 
     53     /**
     54      * {@inheritDoc}
     55      */
     56     @Override
     57     public ProcessUsageItem parse(List<String> lines) {
     58         String processUid = null;
     59         int alarmWakeups = 0;
     60         for (String line : lines) {
     61             Matcher m = UID_PATTERN.matcher(line);
     62             if (m.matches()) {
     63                 if (processUid != null) {
     64                     // Save the process usage info for the previous process
     65                     mItem.addProcessUsage(processUid, alarmWakeups, mSensorUsage);
     66                 }
     67                 processUid = m.group(1);
     68                 mSensorUsage = new LinkedList<SensorInfoItem>();
     69                 continue;
     70             }
     71             m = SENSOR_PATTERN.matcher(line);
     72             if (m.matches()) {
     73                 final long duration = NumberFormattingUtil.getMs(
     74                         NumberFormattingUtil.parseIntOrZero(m.group(2)),
     75                         NumberFormattingUtil.parseIntOrZero(m.group(3)),
     76                         NumberFormattingUtil.parseIntOrZero(m.group(4)),
     77                         NumberFormattingUtil.parseIntOrZero(m.group(5)),
     78                         NumberFormattingUtil.parseIntOrZero(m.group(6)));
     79                 mSensorUsage.add(new SensorInfoItem(m.group(1), duration));
     80                 continue;
     81             }
     82             m = ALARM_PATTERN.matcher(line);
     83             if (m.matches()) {
     84                 alarmWakeups = Integer.parseInt(m.group(1));
     85             }
     86         }
     87         // Add the last process usage stats to the list
     88         if (processUid != null) {
     89             // Save the process usage info for the previous process
     90             mItem.addProcessUsage(processUid, alarmWakeups, mSensorUsage);
     91         }
     92 
     93         return mItem;
     94     }
     95 
     96     /**
     97      * Get the {@link ProcessUsageItem}.
     98      * <p>
     99      * Exposed for unit testing.
    100      * </p>
    101      */
    102     ProcessUsageItem getItem() {
    103         return mItem;
    104     }
    105 }
    106