org.apache.hadoop.hbase

Interface ScheduledChore.ChoreServicer

All Known Implementing Classes:

ChoreService

Enclosing class:

ScheduledChore

static interface ScheduledChore.ChoreServicer

Method Summary

Modifier and Type	Method and Description
void	cancelChore(ScheduledChore chore) Cancel any ongoing schedules that this chore has with the implementer of this interface.
void	cancelChore(ScheduledChore chore, boolean mayInterruptIfRunning)
boolean	isChoreScheduled(ScheduledChore chore)
void	onChoreMissedStartTime(ScheduledChore chore) A callback that tells the implementer of this interface that one of the scheduled chores is missing its start time.
boolean	triggerNow(ScheduledChore chore) This method tries to execute the chore immediately.

Method Detail

cancelChore

void cancelChore(ScheduledChore chore)

Cancel any ongoing schedules that this chore has with the implementer of this interface.

cancelChore

void cancelChore(ScheduledChore chore,
                 boolean mayInterruptIfRunning)

isChoreScheduled

boolean isChoreScheduled(ScheduledChore chore)

Returns:

true when the chore is scheduled with the implementer of this interface

triggerNow

boolean triggerNow(ScheduledChore chore)

This method tries to execute the chore immediately. If the chore is executing at the time of this call, the chore will begin another execution as soon as the current execution finishes

If the chore is not scheduled with a ChoreService, this call will fail.

Returns:

false when the chore could not be triggered immediately

onChoreMissedStartTime

void onChoreMissedStartTime(ScheduledChore chore)

A callback that tells the implementer of this interface that one of the scheduled chores is missing its start time. The implication of a chore missing its start time is that the service's current means of scheduling may not be sufficient to handle the number of ongoing chores (the other explanation is that the chore's execution time is greater than its scheduled period). The service should try to increase its concurrency when this callback is received.

Parameters:

chore - The chore that missed its start time