dk.netarkivet.common.utils
Class TimeUtils

java.lang.Object
  dk.netarkivet.common.utils.TimeUtils

public class TimeUtils
extends java.lang.Object

Various utilities for waiting some time.

Field Summary

static long	DAY_IN_HOURS Constant for the number of hours per day: 24.
static long	HOUR_IN_MINUTES Constant for the number of minutes per hour: 60.
static long	MINUTE_IN_SECONDS Constant for the number of seconds per minute: 60.
static long	SECOND_IN_MILLIS Constant for the number of milliseconds per second: 1000.
static long	WEEK_IN_DAYS Constant for the number of days per week: 7.

Constructor Summary

TimeUtils()

Method Summary

static void	exponentialBackoffSleep(int attempt) Sleep for an exponentially backing off amount of time, in milliseconds.
static void	exponentialBackoffSleep(int attempt, int timeunit) Sleep for an exponentially backing off amount of time.
static java.lang.String	readableTimeInterval(long millis) Method for translating a time in milliseconds to a human readable String.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

SECOND_IN_MILLIS

public static final long SECOND_IN_MILLIS

Constant for the number of milliseconds per second: 1000.

See Also:

Constant Field Values

MINUTE_IN_SECONDS

public static final long MINUTE_IN_SECONDS

Constant for the number of seconds per minute: 60.

See Also:

Constant Field Values

HOUR_IN_MINUTES

public static final long HOUR_IN_MINUTES

Constant for the number of minutes per hour: 60.

See Also:

Constant Field Values

DAY_IN_HOURS

public static final long DAY_IN_HOURS

Constant for the number of hours per day: 24.

See Also:

Constant Field Values

WEEK_IN_DAYS

public static final long WEEK_IN_DAYS

Constant for the number of days per week: 7.

See Also:

Constant Field Values

Constructor Detail

TimeUtils

public TimeUtils()

Method Detail

exponentialBackoffSleep

public static void exponentialBackoffSleep(int attempt)

Sleep for an exponentially backing off amount of time, in milliseconds. Thus the first attempt will sleep for 1 ms, the second for 2, the third for 4, etc.

Parameters:

attempt - The attempt number, which is the log2 of the number of milliseconds spent asleep.

exponentialBackoffSleep

public static void exponentialBackoffSleep(int attempt,
                                           int timeunit)

Sleep for an exponentially backing off amount of time. The mode describes the unit of time as defined by @see java.util.Calendar

Parameters:

attempt - The attempt number, which is the log2 of the number of timeunits spent asleep.

timeunit - the specified timeunit in miliseconds

Throws:

ArgumentNotValid - if timeunit is unsupported.

readableTimeInterval

public static java.lang.String readableTimeInterval(long millis)

Method for translating a time in milliseconds to a human readable String. E.g. the argument "604800000" should result in "7 days".

Parameters:

millis - The amount of milliseconds.

Returns:

The human readable string.