org.apache.hadoop.hbase.codec
Interface Encoder
- All Known Implementing Classes:
- BaseEncoder, KeyValueCodec.KeyValueEncoder
@InterfaceAudience.Private
@InterfaceStability.Evolving
public interface Encoder
Accepts a stream of KeyValues. This can be used to anywhere KeyValues need to be written out, but
currently it is only used for serializing WALEdits. This could be backed by a List, but
more efficient implementations will append results to a byte[] to eliminate overhead, and
possibly encode the underlying data further.
To read the data back, use a corresponding Decoder
- See Also:
Decoder
Method Summary |
void |
flush()
Let the implementation decide what to do. |
void |
write(KeyValue cell)
Implementation must copy the entire state of the cell. |
write
void write(KeyValue cell)
throws IOException
- Implementation must copy the entire state of the cell. If the written cell is modified
immediately after the write method returns, the modifications must have absolutely no effect on
the copy of the cell that was added in the write.
- Parameters:
cell
- cell to serialize
- Throws:
IOException
flush
void flush()
throws IOException
- Let the implementation decide what to do. Usually means writing accumulated data into a
byte[] that can then be read from the implementation to be sent to disk, put in the block
cache, or sent over the network.
- Throws:
IOException
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