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

Interface Summary

Interface	Description
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.
AbstractProtobufWALReader	Base class for reading protobuf based wal reader
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 original implementation of FSWAL.
MetricsWAL	Class used to push numbers about the WAL into the metrics subsystem.
ProtobufLogWriter	Writer for protobuf-based WAL.
ProtobufWALStreamReader	A one way stream reader for reading protobuf based WAL file.
ProtobufWALTailingReader	A WAL reader for replication.
SecureWALCellCodec	A WALCellCodec that encrypts the WALedits.
SyncFutureCache	A cache of SyncFutures.
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.
WALEventTrackerListener
WALUtil	Helper methods to ease Region Server integration with the Write Ahead Log (WAL).

Enum Summary

Enum	Description
CompressionContext.DictionaryIndex
WALActionsListener.RollRequestReason	The reason for the log roll request.
WALEventTrackerListener.WalState

Exception Summary

Exception	Description
DamagedWALException	Thrown when a failed append or sync on a WAL.
WALHeaderEOFException	A special EOFException to indicate that the EOF happens when we read the header of a WAL file.
WALSyncTimeoutIOException	Thrown when WAL.sync() timeout.