Package org.apache.hadoop.hbase.regionserver

Class PrefetchExecutorNotifier

java.lang.Object

org.apache.hadoop.hbase.regionserver.PrefetchExecutorNotifier

All Implemented Interfaces:

ConfigurationObserver, PropagatingConfigurationObserver

@Private
public final class PrefetchExecutorNotifier
extends Object
implements PropagatingConfigurationObserver

Class to submit requests for PrefetchExecutor depending on configuration change

Field Summary

Fields

Modifier and Type	Field	Description
private final org.apache.hadoop.conf.Configuration	conf
private static final org.slf4j.Logger	LOG
static final String	PREFETCH_DELAY	Wait time in miliseconds before executing prefetch

Constructor Summary

Constructors

Constructor	Description
PrefetchExecutorNotifier(org.apache.hadoop.conf.Configuration conf)

Method Summary

Modifier and Type	Method	Description
void	deregisterChildren(ConfigurationManager manager)	Needs to be called to deregister the children from the manager.
int	getPrefetchDelay()
void	onConfigurationChange(org.apache.hadoop.conf.Configuration newConf)	This method would be called by the ConfigurationManager object when the Configuration object is reloaded from disk.
void	registerChildren(ConfigurationManager manager)	Needs to be called to register the children to the manager.

Methods inherited from class java.lang.Object

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

Field Details

LOG

private static final org.slf4j.Logger LOG

PREFETCH_DELAY

public static final String PREFETCH_DELAY

Wait time in miliseconds before executing prefetch

See Also:

• Constant Field Values

conf

private final org.apache.hadoop.conf.Configuration conf

Constructor Details

PrefetchExecutorNotifier

public PrefetchExecutorNotifier(org.apache.hadoop.conf.Configuration conf)

Method Details

onConfigurationChange

public void onConfigurationChange(org.apache.hadoop.conf.Configuration newConf)

This method would be called by the ConfigurationManager object when the Configuration object is reloaded from disk.

Specified by:

onConfigurationChange in interface ConfigurationObserver

registerChildren

public void registerChildren(ConfigurationManager manager)

Needs to be called to register the children to the manager.

Specified by:

registerChildren in interface PropagatingConfigurationObserver

Parameters:

manager - : to register to

deregisterChildren

public void deregisterChildren(ConfigurationManager manager)

Needs to be called to deregister the children from the manager.

Specified by:

deregisterChildren in interface PropagatingConfigurationObserver

Parameters:

manager - : to deregister from

getPrefetchDelay

public int getPrefetchDelay()