org.apache.hadoop.hbase.io.hfile.bucket

类 ExclusiveMemoryMmapIOEngine

java.lang.Object

org.apache.hadoop.hbase.io.hfile.bucket.FileMmapIOEngine

org.apache.hadoop.hbase.io.hfile.bucket.ExclusiveMemoryMmapIOEngine

所有已实现的接口:

IOEngine

@InterfaceAudience.Private
public class ExclusiveMemoryMmapIOEngine
extends FileMmapIOEngine

IO engine that stores data to a file on the local block device using memory mapping mechanism

字段概要

从类继承的字段 org.apache.hadoop.hbase.io.hfile.bucket.FileMmapIOEngine

bufferArray, path, size

构造器概要

构造器

构造器和说明
ExclusiveMemoryMmapIOEngine(String filePath, long capacity)

方法概要

限定符和类型	方法和说明
Cacheable	read(long offset, int length, CacheableDeserializer<Cacheable> deserializer) Transfers data from IOEngine to a Cacheable object.

从类继承的方法 org.apache.hadoop.hbase.io.hfile.bucket.FileMmapIOEngine

isPersistent, shutdown, sync, toString, write, write

从类继承的方法 java.lang.Object

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

从接口继承的方法 org.apache.hadoop.hbase.io.hfile.bucket.IOEngine

usesSharedMemory

构造器详细资料

ExclusiveMemoryMmapIOEngine

public ExclusiveMemoryMmapIOEngine(String filePath,
                                   long capacity)
                            throws IOException

抛出:

IOException

方法详细资料

read

public Cacheable read(long offset,
                      int length,
                      CacheableDeserializer<Cacheable> deserializer)
               throws IOException

从接口复制的说明: IOEngine

Transfers data from IOEngine to a Cacheable object.

指定者:

read 在接口中 IOEngine

指定者:

read 在类中 FileMmapIOEngine

参数:

offset - The offset in the IO engine where the first byte to be read

length - How many bytes to be read from the offset

deserializer - The deserializer to be used to make a Cacheable from the data.

返回:

Cacheable

抛出:

IOException