content: /*
   * 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 com.android.statsd.loadtest;
  
  import android.annotation.Nullable;
  import android.os.SystemClock;
  import android.util.Log;
  import java.util.regex.Matcher;
  import java.util.regex.Pattern;
  
  /** Parses PSS info from dumpsys meminfo */
  public class MemInfoParser implements PerfParser {
  
      private static final Pattern LINE_PATTERN =
          Pattern.compile("\\s*(\\d*,*\\d*)K:\\s(\\S*)\\s\\.*");
      private static final String PSS_BY_PROCESS = "Total PSS by process:";
      private static final String TAG = "loadtest.MemInfoParser";
  
      private boolean mPssStarted;
      private boolean mPssEnded;
      private final long mStartTimeMillis;
  
      public MemInfoParser(long startTimeMillis) {
          mStartTimeMillis = startTimeMillis;
      }
  
      @Override
      @Nullable
      public String parseLine(String line) {
          if (mPssEnded) {
              return null;
          }
          if (!mPssStarted) {
              if (line.contains(PSS_BY_PROCESS)) {
                  mPssStarted = true;
              }
              return null;
          }
          if (line.isEmpty()) {
              mPssEnded = true;
              return null;
          }
          Matcher lineMatcher = LINE_PATTERN.matcher(line);
          if (lineMatcher.find() && lineMatcher.group(1) != null && lineMatcher.group(2) != null) {
              if (lineMatcher.group(2).equals("statsd")) {
                  long timeDeltaMillis = SystemClock.elapsedRealtime() - mStartTimeMillis;
                  return timeDeltaMillis + "," + convertToPss(lineMatcher.group(1));
              }
          }
          return null;
      }
  
      private String convertToPss(String input) {
          return input.replace(",", "");
      }
  }
  