Package org.apache.hadoop.hbase.wal

Class LazyInitializedWALProvider

java.lang.Object

org.apache.hadoop.hbase.wal.LazyInitializedWALProvider

All Implemented Interfaces:

Closeable, AutoCloseable

@Private
class LazyInitializedWALProvider
extends Object
implements Closeable

A lazy initialized WAL provider for holding the WALProvider for some special tables, such as hbase:meta, hbase:replication, etc.

Field Summary

Fields

Modifier and Type	Field	Description
private final Abortable	abortable
private final WALFactory	factory
private final AtomicReference<WALProvider>	holder
private final String	providerConfigName
private final String	providerId

Constructor Summary

Constructors

Constructor	Description
LazyInitializedWALProvider(WALFactory factory, String providerId, String providerConfigName, Abortable abortable)

Method Summary

Modifier and Type	Method	Description
void	close()
(package private) WALProvider	getProvider()
(package private) WALProvider	getProviderNoCreate()	Get the provider if it already initialized, otherwise just return null instead of creating it.
(package private) void	shutdown()

Methods inherited from class java.lang.Object

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

Field Details

factory

private final WALFactory factory

providerId

private final String providerId

providerConfigName

private final String providerConfigName

abortable

private final Abortable abortable

holder

private final AtomicReference<WALProvider> holder

Constructor Details

LazyInitializedWALProvider

LazyInitializedWALProvider(WALFactory factory,
 String providerId,
 String providerConfigName,
 Abortable abortable)

Method Details

getProvider

WALProvider getProvider()
                 throws IOException

Throws:

IOException

getProviderNoCreate

WALProvider getProviderNoCreate()

Get the provider if it already initialized, otherwise just return null instead of creating it.

close

public void close()
           throws IOException

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

Throws:

IOException

shutdown

void shutdown()
       throws IOException

Throws:

IOException