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java.lang.Objectorg.apache.hadoop.hbase.io.TagCompressionContext
@InterfaceAudience.Private public class TagCompressionContext
Context that holds the dictionary for Tag compression and doing the compress/uncompress. This will be used for compressing tags while writing into HFiles and WALs.
Constructor Summary | |
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TagCompressionContext(Class<? extends Dictionary> dictType,
int dictCapacity)
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Method Summary | |
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void |
clear()
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void |
compressTags(OutputStream out,
byte[] in,
int offset,
int length)
Compress tags one by one and writes to the OutputStream. |
void |
compressTags(OutputStream out,
ByteBuffer in,
int length)
Compress tags one by one and writes to the OutputStream. |
int |
uncompressTags(ByteBuffer src,
byte[] dest,
int offset,
int length)
Uncompress tags from the input ByteBuffer and writes to the destination array. |
void |
uncompressTags(InputStream src,
byte[] dest,
int offset,
int length)
Uncompress tags from the InputStream and writes to the destination array. |
void |
uncompressTags(InputStream src,
ByteBuffer dest,
int length)
Uncompress tags from the InputStream and writes to the destination buffer. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public TagCompressionContext(Class<? extends Dictionary> dictType, int dictCapacity) throws SecurityException, NoSuchMethodException, InstantiationException, IllegalAccessException, InvocationTargetException
SecurityException
NoSuchMethodException
InstantiationException
IllegalAccessException
InvocationTargetException
Method Detail |
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public void clear()
public void compressTags(OutputStream out, byte[] in, int offset, int length) throws IOException
out
- Stream to which the compressed tags to be writtenin
- Source where tags are availableoffset
- Offset for the tags byteslength
- Length of all tag bytes
IOException
public void compressTags(OutputStream out, ByteBuffer in, int length) throws IOException
out
- Stream to which the compressed tags to be writtenin
- Source buffer where tags are availablelength
- Length of all tag bytes
IOException
public void uncompressTags(InputStream src, byte[] dest, int offset, int length) throws IOException
src
- Stream where the compressed tags are availabledest
- Destination array where to write the uncompressed tagsoffset
- Offset in destination where tags to be writtenlength
- Length of all tag bytes
IOException
public int uncompressTags(ByteBuffer src, byte[] dest, int offset, int length) throws IOException
src
- Buffer where the compressed tags are availabledest
- Destination array where to write the uncompressed tagsoffset
- Offset in destination where tags to be writtenlength
- Length of all tag bytes
IOException
public void uncompressTags(InputStream src, ByteBuffer dest, int length) throws IOException
src
- Stream where the compressed tags are availabledest
- Destination buffer where to write the uncompressed tagslength
- Length of all tag bytes
IOException
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