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

Interface Summary

Interface	Description
HLog
HLog.Reader
HLog.Writer
MetricsEditsReplaySource	Interface of the source that will export metrics about log replay statistics when recovering a region server in distributedLogReplay mode
MetricsWALSource	Interface of the source that will export metrics about the region server's HLog.
WALActionsListener	Get notification of FSHLog/WAL log events.
WALCellCodec.ByteStringCompressor
WALCellCodec.ByteStringUncompressor

Class Summary

Class	Description
Compressor	A set of static functions for running our custom WAL compression/decompression.
HLog.Entry	Utility class that lets us keep track of the edit with it's key.
HLogFactory
HLogKey	A Key for an entry in the change log.
HLogPrettyPrinter	HLogPrettyPrinter prints the contents of a given HLog with a variety of options affecting formatting and extent of content.
HLogSplitter	This class is responsible for splitting up a bunch of regionserver commit log files that are no longer being written to, into new files, one per region for region to replay on startup.
HLogSplitter.MutationReplay	A struct used by getMutationsFromWALEntry
HLogUtil
MetricsEditsReplaySourceImpl	Hadoop1 implementation of MetricsMasterSource.
MetricsWAL	Class used to push numbers about the WAL into the metrics subsystem.
MetricsWALEditsReplay	Class used to push numbers about WAL edits replay into the metrics subsystem.
MetricsWALSourceImpl	Class that transitions metrics from HLog's MetricsWAL into the metrics subsystem.
ProtobufLogReader	A Protobuf based WAL has the following structure:
ProtobufLogWriter	Writer for protobuf-based WAL.
ReaderBase
SecureProtobufLogReader
SecureProtobufLogWriter
SecureWALCellCodec	A WALCellCodec that encrypts the WALedits.
SequenceFileLogReader
WALCellCodec	Compression in this class is lifted off Compressor/KeyValueCompression.
WALCoprocessorHost	Implements the coprocessor environment and runtime support for coprocessors loaded within a FSHLog.
WALEdit	WALEdit: Used in HBase's transaction log (WAL) to represent the collection of edits (KeyValue objects) corresponding to a single transaction.
WALEditsReplaySink	This class is responsible for replaying the edits coming from a failed region server.
WriterBase	Context used by our wal dictionary compressor.

Exception Summary

Exception	Description
FailedLogCloseException	Thrown when we fail close of the write-ahead-log file.
OrphanHLogAfterSplitException