Package org.apache.hadoop.hbase.io.hfile

Class SharedMemHFileBlock

java.lang.Object

org.apache.hadoop.hbase.io.hfile.HFileBlock

org.apache.hadoop.hbase.io.hfile.SharedMemHFileBlock

All Implemented Interfaces:

HeapSize, Cacheable, HBaseReferenceCounted, org.apache.hbase.thirdparty.io.netty.util.ReferenceCounted

@Private
public class SharedMemHFileBlock
extends HFileBlock

The ByteBuffAllocator won't allocate pooled heap ByteBuff now; at the same time, if allocate an off-heap ByteBuff from allocator, then it must be a pooled one. That's to say, an exclusive memory HFileBlock would must be an heap block and a shared memory HFileBlock would must be an off-heap block.

See Also:

• ExclusiveMemHFileBlock

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.hadoop.hbase.io.hfile.HFileBlock

HFileBlock.BlockDeserializer, HFileBlock.BlockIterator, HFileBlock.BlockWritable, HFileBlock.FSReader, HFileBlock.FSReaderImpl, HFileBlock.Header, HFileBlock.Writer

Field Summary

Fields inherited from class org.apache.hadoop.hbase.io.hfile.HFileBlock

BLOCK_DESERIALIZER, BLOCK_METADATA_SPACE, CHECKSUM_SIZE, CHECKSUM_VERIFICATION_NUM_IO_THRESHOLD, DONT_FILL_HEADER, DUMMY_HEADER_NO_CHECKSUM, FILL_HEADER, FIXED_OVERHEAD, MULTI_BYTE_BUFFER_HEAP_SIZE

Constructor Summary

Constructors

Constructor	Description
SharedMemHFileBlock(BlockType blockType, int onDiskSizeWithoutHeader, int uncompressedSizeWithoutHeader, long prevBlockOffset, ByteBuff buf, boolean fillHeader, long offset, int nextBlockOnDiskSize, int onDiskDataSizeWithHeader, HFileContext fileContext, ByteBuffAllocator alloc)

Method Summary

Modifier and Type	Method	Description
boolean	isSharedMem()	Will be override by SharedMemHFileBlock or ExclusiveMemHFileBlock.

Methods inherited from class org.apache.hadoop.hbase.io.hfile.HFileBlock

createFromBuff, deepCloneOnHeap, equals, getBlockType, getBufferReadOnly, getBufferWithoutHeader, getByteBuffAllocator, getBytesPerChecksum, getByteStream, getChecksumType, getDataBlockEncoding, getDataBlockEncodingId, getDeserializer, getDummyHeaderForVersion, getHFileContext, getMetaData, getNextBlockOnDiskSize, getOffset, getOnDiskDataSizeWithHeader, getOnDiskSizeWithHeader, getOnDiskSizeWithoutHeader, getPrevBlockOffset, getSerializedLength, getUncompressedSizeWithoutHeader, hashCode, headerSize, headerSize, heapSize, isUnpacked, refCnt, release, retain, sanityCheck, sanityCheckUncompressed, serialize, toString, toStringHeader, totalChecksumBytes, touch, touch, unpack

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.apache.hadoop.hbase.nio.HBaseReferenceCounted

release, retain

Constructor Details

SharedMemHFileBlock

SharedMemHFileBlock(BlockType blockType,
 int onDiskSizeWithoutHeader,
 int uncompressedSizeWithoutHeader,
 long prevBlockOffset,
 ByteBuff buf,
 boolean fillHeader,
 long offset,
 int nextBlockOnDiskSize,
 int onDiskDataSizeWithHeader,
 HFileContext fileContext,
 ByteBuffAllocator alloc)

Method Details

isSharedMem

public boolean isSharedMem()

Description copied from class: HFileBlock

Will be override by SharedMemHFileBlock or ExclusiveMemHFileBlock. Return true by default.

Overrides:

isSharedMem in class HFileBlock