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java.lang.Objectorg.apache.hadoop.hbase.regionserver.wal.WALCellCodec
@InterfaceAudience.LimitedPrivate(value={"Coprocesssor","Phoenix","Configuration"}) public class WALCellCodec
Compression in this class is lifted off Compressor/KeyValueCompression. This is a pure coincidence... they are independent and don't have to be compatible. This codec is used at server side for writing cells to WAL as well as for sending edits as part of the distributed splitting process.
Nested Class Summary | |
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static interface |
WALCellCodec.ByteStringCompressor
|
static interface |
WALCellCodec.ByteStringUncompressor
|
class |
WALCellCodec.EnsureKvEncoder
|
Nested classes/interfaces inherited from interface org.apache.hadoop.hbase.codec.Codec |
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Codec.Decoder, Codec.Encoder |
Field Summary | |
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protected org.apache.hadoop.hbase.regionserver.wal.CompressionContext |
compression
|
protected WALCellCodec.ByteStringUncompressor |
statelessUncompressor
|
static String |
WAL_CELL_CODEC_CLASS_KEY
Configuration key for the class to use when encoding cells in the WAL |
Constructor Summary | |
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WALCellCodec()
All subclasses must implement a no argument constructor |
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WALCellCodec(org.apache.hadoop.conf.Configuration conf,
org.apache.hadoop.hbase.regionserver.wal.CompressionContext compression)
Default constructor - all subclasses must implement a constructor with this signature if they are to be dynamically loaded from the Configuration . |
Method Summary | |
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static WALCellCodec |
create(org.apache.hadoop.conf.Configuration conf,
org.apache.hadoop.hbase.regionserver.wal.CompressionContext compression)
Create and setup a WALCellCodec from the
CompressionContext. |
static WALCellCodec |
create(org.apache.hadoop.conf.Configuration conf,
String cellCodecClsName,
org.apache.hadoop.hbase.regionserver.wal.CompressionContext compression)
Create and setup a WALCellCodec from the cellCodecClsName and
CompressionContext, if cellCodecClsName is specified. |
WALCellCodec.ByteStringCompressor |
getByteStringCompressor()
|
WALCellCodec.ByteStringUncompressor |
getByteStringUncompressor()
|
Codec.Decoder |
getDecoder(InputStream is)
|
Codec.Encoder |
getEncoder(OutputStream os)
|
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
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public static final String WAL_CELL_CODEC_CLASS_KEY
protected final org.apache.hadoop.hbase.regionserver.wal.CompressionContext compression
protected final WALCellCodec.ByteStringUncompressor statelessUncompressor
Constructor Detail |
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public WALCellCodec()
public WALCellCodec(org.apache.hadoop.conf.Configuration conf, org.apache.hadoop.hbase.regionserver.wal.CompressionContext compression)
Configuration
.
conf
- configuration to configure thiscompression
- compression the codec should support, can be null to indicate no
compressionMethod Detail |
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public static WALCellCodec create(org.apache.hadoop.conf.Configuration conf, String cellCodecClsName, org.apache.hadoop.hbase.regionserver.wal.CompressionContext compression) throws UnsupportedOperationException
WALCellCodec
from the cellCodecClsName
and
CompressionContext, if cellCodecClsName
is specified.
Otherwise Cell Codec classname is read from Configuration
.
Fully prepares the codec for use.
conf
- Configuration
to read for the user-specified codec. If none is specified,
uses a WALCellCodec
.compression
- compression the codec should use
WALCellCodec
ready for use.
UnsupportedOperationException
- if the codec cannot be instantiatedpublic static WALCellCodec create(org.apache.hadoop.conf.Configuration conf, org.apache.hadoop.hbase.regionserver.wal.CompressionContext compression) throws UnsupportedOperationException
WALCellCodec
from the
CompressionContext.
Cell Codec classname is read from Configuration
.
Fully prepares the codec for use.
conf
- Configuration
to read for the user-specified codec. If none is specified,
uses a WALCellCodec
.compression
- compression the codec should use
WALCellCodec
ready for use.
UnsupportedOperationException
- if the codec cannot be instantiatedpublic Codec.Decoder getDecoder(InputStream is)
getDecoder
in interface Codec
public Codec.Encoder getEncoder(OutputStream os)
getEncoder
in interface Codec
public WALCellCodec.ByteStringCompressor getByteStringCompressor()
public WALCellCodec.ByteStringUncompressor getByteStringUncompressor()
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