private static long extractDate(String line) {
    Matcher matcher = DATE_PATTERN.matcher(line);
    if (!matcher.find()) {
      throw new IllegalStateException("Could not parse timestamp from line " + line);
    }
    matcher.start();
    final DateFormat formatter = DateFormatter.createDateFormat();
    Date date = formatter.parse(line, new ParsePosition(matcher.start()));
    return date.getTime();
  }
A utility to convert existing gemfire logs into a graph logger file. This will help me debug
hydra runs more quickly.
geode-core/src/main/java/org/apache/geode/internal/sequencelog/io/GemfireLogConverter.java