Package alluxio.heartbeat

Class CronExpressionIntervalSupplier

java.lang.Object

alluxio.heartbeat.CronExpressionIntervalSupplier

All Implemented Interfaces:

SleepIntervalSupplier

public class CronExpressionIntervalSupplier
extends java.lang.Object
implements SleepIntervalSupplier

Calculate the next interval by given cron expression.

Constructor Summary

Constructors

Constructor	Description
CronExpressionIntervalSupplier(org.apache.logging.log4j.core.util.CronExpression cronExpression, long fixedInterval)	Constructs a new CronExpressionIntervalSupplier.

Method Summary

Modifier and Type	Method	Description
long	getNextInterval(long mPreviousTickedMs, long nowTimeStampMillis)	Gets the next interval for sleeping.
long	getRunLimit(long mPreviousTickedMs)	Gets the run limit from previous ticked.

Methods inherited from class java.lang.Object

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

Constructor Detail

CronExpressionIntervalSupplier

public CronExpressionIntervalSupplier(org.apache.logging.log4j.core.util.CronExpression cronExpression,
                                      long fixedInterval)

Constructs a new CronExpressionIntervalSupplier.

Parameters:

cronExpression - the cron expression

fixedInterval - the fixed interval

Method Detail

getNextInterval

public long getNextInterval(long mPreviousTickedMs,
                            long nowTimeStampMillis)

Description copied from interface: SleepIntervalSupplier

Gets the next interval for sleeping.

Specified by:

getNextInterval in interface SleepIntervalSupplier

Parameters:

mPreviousTickedMs - previous ticked time stamp in millisecond

nowTimeStampMillis - current time stamp in millisecond

Returns:

the interval to sleep starting from now before next time the timer triggers

getRunLimit

public long getRunLimit(long mPreviousTickedMs)

Description copied from interface: SleepIntervalSupplier

Gets the run limit from previous ticked.

Specified by:

getRunLimit in interface SleepIntervalSupplier

Parameters:

mPreviousTickedMs - previous ticked time stamp in millisecond

Returns:

the run limit