Package org.apache.accumulo.core.spi.cache

Class BlockCacheManager

java.lang.Object

org.apache.accumulo.core.spi.cache.BlockCacheManager

Direct Known Subclasses:

LruBlockCacheManager, TinyLfuBlockCacheManager

public abstract class BlockCacheManager
extends Object

Since:

2.0.0

See Also:

org.apache.accumulo.core.spi

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	BlockCacheManager.Configuration

Constructor Summary

Constructors

Constructor	Description
BlockCacheManager()

Method Summary

Modifier and Type	Method	Description
protected abstract BlockCache	createCache(BlockCacheManager.Configuration conf, CacheType type)	Create a block cache using the supplied configuration
BlockCache	getBlockCache(CacheType type)	Get the block cache of the given type
static String	getFullyQualifiedPropertyPrefix(String prefix)	Deprecated. since 2.1.0 because this method does not support scan servers, only tservers.
static String	getFullyQualifiedPropertyPrefix(String prefix, CacheType type)	Deprecated. since 2.1.0 because this method does not support scan servers, only tservers.
void	start(BlockCacheManager.Configuration conf)	Initialize the caches for each CacheType based on the configuration
void	stop()	Stop caches and release resources

Methods inherited from class java.lang.Object

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

Constructor Detail

BlockCacheManager

public BlockCacheManager()

Method Detail

start

public void start(BlockCacheManager.Configuration conf)

Initialize the caches for each CacheType based on the configuration

Parameters:

conf - accumulo configuration

stop

public void stop()

Stop caches and release resources

getBlockCache

public BlockCache getBlockCache(CacheType type)

Get the block cache of the given type

Parameters:

type - block cache type

Returns:

BlockCache or null if not enabled

createCache

protected abstract BlockCache createCache(BlockCacheManager.Configuration conf,
                                          CacheType type)

Create a block cache using the supplied configuration

Parameters:

conf - cache configuration

Returns:

configured block cache

getFullyQualifiedPropertyPrefix

@Deprecated(since="2.1.0")
public static String getFullyQualifiedPropertyPrefix(String prefix)

Deprecated.

since 2.1.0 because this method does not support scan servers, only tservers. Use BlockCacheManager.Configuration.getProperties(String, CacheType) instead.

A convenience method that returns a string of the from tserver.cache.config.<prefix>.default. this method is useful for configuring a cache manager.

Parameters:

prefix - A unique identifier that corresponds to a particular BlockCacheManager implementation.

See Also:

BlockCacheManager.Configuration.getProperties(String, CacheType)

getFullyQualifiedPropertyPrefix

@Deprecated(since="2.1.0")
public static String getFullyQualifiedPropertyPrefix(String prefix,
                                                     CacheType type)

Deprecated.

since 2.1.0 because this method does not support scan servers, only tservers. Use BlockCacheManager.Configuration.getProperties(String, CacheType) instead.

A convenience method that returns a string of the from tserver.cache.config.<prefix>.<type>. this method is useful for configuring a cache manager.

Parameters:

prefix - A unique identifier that corresponds to a particular BlockCacheManager implementation.

See Also:

BlockCacheManager.Configuration.getProperties(String, CacheType)