org.apache.hadoop.hbase.regionserver

类 StoreEngine<SF extends org.apache.hadoop.hbase.regionserver.StoreFlusher,CP extends CompactionPolicy,C extends Compactor,SFM extends StoreFileManager>

java.lang.Object

org.apache.hadoop.hbase.regionserver.StoreEngine<SF,CP,C,SFM>

直接已知子类:

DateTieredStoreEngine, DefaultStoreEngine, StripeStoreEngine

@InterfaceAudience.Private
public abstract class StoreEngine<SF extends org.apache.hadoop.hbase.regionserver.StoreFlusher,CP extends CompactionPolicy,C extends Compactor,SFM extends StoreFileManager>
extends Object

StoreEngine is a factory that can create the objects necessary for HStore to operate. Since not all compaction policies, compactors and store file managers are compatible, they are tied together and replaced together via StoreEngine-s.

字段概要

字段

限定符和类型	字段和说明
protected CP	compactionPolicy
protected C	compactor
static String	STORE_ENGINE_CLASS_KEY The name of the configuration parameter that specifies the class of a store engine that is used to manage and compact HBase store files.
protected SFM	storeFileManager
protected SF	storeFlusher

构造器概要

构造器

构造器和说明
StoreEngine()

方法概要

方法

限定符和类型	方法和说明
static StoreEngine<?,?,?,?>	create(Store store, org.apache.hadoop.conf.Configuration conf, KeyValue.KVComparator kvComparator) Create the StoreEngine configured for the given Store.
abstract CompactionContext	createCompaction() Creates an instance of a compaction context specific to this engine.
protected abstract void	createComponents(org.apache.hadoop.conf.Configuration conf, Store store, KeyValue.KVComparator kvComparator) Create the StoreEngine's components.
CompactionPolicy	getCompactionPolicy()
Compactor	getCompactor()
StoreFileManager	getStoreFileManager()
org.apache.hadoop.hbase.regionserver.StoreFlusher	getStoreFlusher()
abstract boolean	needsCompaction(List<StoreFile> filesCompacting)

从类继承的方法 java.lang.Object

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

字段详细资料

storeFlusher

protected SF extends org.apache.hadoop.hbase.regionserver.StoreFlusher storeFlusher

compactionPolicy

protected CP extends CompactionPolicy compactionPolicy

compactor

protected C extends Compactor compactor

storeFileManager

protected SFM extends StoreFileManager storeFileManager

STORE_ENGINE_CLASS_KEY

public static final String STORE_ENGINE_CLASS_KEY

The name of the configuration parameter that specifies the class of a store engine that is used to manage and compact HBase store files.

另请参阅:

常量字段值

构造器详细资料

StoreEngine

public StoreEngine()

方法详细资料

getCompactionPolicy

public CompactionPolicy getCompactionPolicy()

返回:

Compaction policy to use.

getCompactor

public Compactor getCompactor()

返回:

Compactor to use.

getStoreFileManager

public StoreFileManager getStoreFileManager()

返回:

Store file manager to use.

getStoreFlusher

public org.apache.hadoop.hbase.regionserver.StoreFlusher getStoreFlusher()

返回:

Store flusher to use.

needsCompaction

public abstract boolean needsCompaction(List<StoreFile> filesCompacting)

参数:

filesCompacting - Files currently compacting

返回:

whether a compaction selection is possible

createCompaction

public abstract CompactionContext createCompaction()
                                            throws IOException

Creates an instance of a compaction context specific to this engine. Doesn't actually select or start a compaction. See CompactionContext class comment.

返回:

New CompactionContext object.

抛出:

IOException

createComponents

protected abstract void createComponents(org.apache.hadoop.conf.Configuration conf,
                    Store store,
                    KeyValue.KVComparator kvComparator)
                                  throws IOException

Create the StoreEngine's components.

抛出:

IOException

create

public static StoreEngine<?,?,?,?> create(Store store,
                          org.apache.hadoop.conf.Configuration conf,
                          KeyValue.KVComparator kvComparator)
                                   throws IOException

Create the StoreEngine configured for the given Store.

参数:

store - The store. An unfortunate dependency needed due to it being passed to coprocessors via the compactor.

conf - Store configuration.

kvComparator - KVComparator for storeFileManager.

返回:

StoreEngine to use.

抛出:

IOException