dropwizard-jobs-core/src/main/java/io/dropwizard/jobs/parser/TimeParserUtil.java
public static long parseDuration(String duration) {
        if (duration == null || duration.isEmpty()) {
            throw new IllegalArgumentException("duration may not be null");
        }
        long toAdd = -1;
        if (days.matcher(duration).matches()) {
            Matcher matcher = days.matcher(duration);
            matcher.matches();
            toAdd = Long.parseLong(matcher.group(1)) * 60 * 60 * 24 * 1000;
        } else if (hours.matcher(duration).matches()) {
            Matcher matcher = hours.matcher(duration);
            matcher.matches();
            toAdd = Long.parseLong(matcher.group(1)) * 60 * 60 * 1000;
        } else if (minutes.matcher(duration).matches()) {
            Matcher matcher = minutes.matcher(duration);
            matcher.matches();
            toAdd = Long.parseLong(matcher.group(1)) * 60 * 1000;
        } else if (seconds.matcher(duration).matches()) {
            Matcher matcher = seconds.matcher(duration);
            matcher.matches();
            toAdd = Long.parseLong(matcher.group(1)) * 1000;
        } else if (milliseconds.matcher(duration).matches()) {
            Matcher matcher = milliseconds.matcher(duration);
            matcher.matches();
            toAdd = Long.parseLong(matcher.group(1));
        }
        if (toAdd == -1) {
            throw new IllegalArgumentException("Invalid duration pattern : " + duration);
        }
        return toAdd;
    }
public static long parseDuration(String duration) {
        if (duration == null || duration.isEmpty()) {
            throw new IllegalArgumentException("duration may not be null");
        }
        long toAdd = -1;
        if (days.matcher(duration).matches()) {
            Matcher matcher = days.matcher(duration);
            matcher.matches();
            toAdd = Long.parseLong(matcher.group(1)) * 60 * 60 * 24 * 1000;
        } else if (hours.matcher(duration).matches()) {
            Matcher matcher = hours.matcher(duration);
            matcher.matches();
            toAdd = Long.parseLong(matcher.group(1)) * 60 * 60 * 1000;
        } else if (minutes.matcher(duration).matches()) {
            Matcher matcher = minutes.matcher(duration);
            matcher.matches();
            toAdd = Long.parseLong(matcher.group(1)) * 60 * 1000;
        } else if (seconds.matcher(duration).matches()) {
            Matcher matcher = seconds.matcher(duration);
            matcher.matches();
            toAdd = Long.parseLong(matcher.group(1)) * 1000;
        } else if (milliseconds.matcher(duration).matches()) {
            Matcher matcher = milliseconds.matcher(duration);
            matcher.matches();
            toAdd = Long.parseLong(matcher.group(1));
        }
        if (toAdd == -1) {
            throw new IllegalArgumentException("Invalid duration pattern : " + duration);
        }
        return toAdd;
    }
Parse a duration

@param duration
1d, 3h, 2mn, 7s, 50ms
@return The number of milliseconds