Package org.apache.hadoop.hbase.regionserver.wal

Interface Summary

Interface	Description
MetricsWALSource	Interface of the source that will export metrics about the region server's WAL.
WALActionsListener	Get notification of WAL events.
WALCellCodec.ByteStringCompressor
WALCellCodec.ByteStringUncompressor

Class Summary

Class	Description
AbstractFSWAL<W extends WALProvider.WriterBase>	Implementation of WAL to go against FileSystem; i.e.
AbstractProtobufLogWriter	Base class for Protobuf log writer.
AsyncFSWAL	An asynchronous implementation of FSWAL.
AsyncProtobufLogWriter	AsyncWriter for protobuf-based WAL.
CompressionContext	Context that holds the various dictionaries for compression in WAL.
Compressor	A set of static functions for running our custom WAL compression/decompression.
FSHLog	The default implementation of FSWAL.
MetricsWAL	Class used to push numbers about the WAL into the metrics subsystem.
MetricsWALSourceImpl	Class that transitions metrics from MetricsWAL into the metrics subsystem.
ProtobufLogReader	A Protobuf based WAL has the following structure:
ProtobufLogWriter	Writer for protobuf-based WAL.
ReaderBase
SecureAsyncProtobufLogWriter
SecureProtobufLogReader
SecureProtobufLogWriter
SecureWALCellCodec	A WALCellCodec that encrypts the WALedits.
WALCellCodec	Compression in this class is lifted off Compressor/KeyValueCompression.
WALCellCodec.EnsureKvEncoder
WALCoprocessorHost	Implements the coprocessor environment and runtime support for coprocessors loaded within a WAL.
WALUtil	Helper methods to ease Region Server integration with the Write Ahead Log (WAL).

Enum Summary

Enum	Description
CompressionContext.DictionaryIndex

Exception Summary

Exception	Description
DamagedWALException	Thrown when a failed append or sync on a WAL.
FailedLogCloseException	Thrown when we fail close of the write-ahead-log file.
FailedSyncBeforeLogCloseException	Thrown when we fail close of the write-ahead-log file.