org.apache.accumulo.server.util.time

Class SimpleTimer

java.lang.Object

org.apache.accumulo.server.util.time.SimpleTimer

public class SimpleTimer
extends Object

Generic singleton timer. Don't use this if you are going to do anything that will take very long. Please use it to reduce the number of threads dedicated to simple events.

Method Summary

Modifier and Type	Method and Description
static SimpleTimer	getInstance(AccumuloConfiguration conf) Gets the timer instance.
static SimpleTimer	getInstance(int threadPoolSize) Gets the timer instance.
ScheduledFuture<?>	schedule(Runnable task, long delay) Schedules a task to run in the future.
ScheduledFuture<?>	schedule(Runnable task, long delay, long period) Schedules a task to run in the future with a fixed delay between repeated executions.

Methods inherited from class java.lang.Object

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

Method Detail

getInstance

public static SimpleTimer getInstance(int threadPoolSize)

Gets the timer instance. If an instance has already been created, it will have the number of threads supplied when it was constructed, and the size provided here is ignored.

Parameters:

threadPoolSize - number of threads

getInstance

public static SimpleTimer getInstance(AccumuloConfiguration conf)

Gets the timer instance. If an instance has already been created, it will have the number of threads supplied when it was constructed, and the size provided by the configuration here is ignored. If a null configuration is supplied, the number of threads defaults to 1.

Parameters:

conf - configuration from which to get the number of threads

See Also:

Property.GENERAL_SIMPLETIMER_THREADPOOL_SIZE

schedule

public ScheduledFuture<?> schedule(Runnable task,
                                   long delay)

Schedules a task to run in the future.

Parameters:

task - task to run

delay - number of milliseconds to wait before execution

Returns:

future for scheduled task

schedule

public ScheduledFuture<?> schedule(Runnable task,
                                   long delay,
                                   long period)

Schedules a task to run in the future with a fixed delay between repeated executions.

Parameters:

task - task to run

delay - number of milliseconds to wait before first execution

period - number of milliseconds to wait between executions

Returns:

future for scheduled task