Package com.sleepycat.je.log

INTERNAL: Low level data storage including log entry sequential logging/writing, random reading/fetching, and sequential reading.

See: Description

Interface Summary

Interface	Description
FileManager.FileFactory	The factory interface for creating RandomAccessFiles.
Loggable	A class that implements Loggable knows how to read and write itself into a ByteBuffer in a format suitable for the JE log or JE replication messages.
LogSource	A class that implements LogSource can return portions of the log.
VersionedWriteLoggable	A sub-interface of Loggable implemented by classes that can write themselves to a byte buffer in an earlier log format, for use by instances of ReplicableLogEntry that need to support an earlier log format during replication.

Class Summary

Class	Description
BasicVersionedWriteLoggable	A basic implementation of VersionedWriteLoggable that provides for writing in a single format by default.
CheckpointFileReader	CheckpointFileReader searches for root and checkpoint entries.
ChecksumValidator	Checksum validator is used to check checksums on log entries.
CleanerFileReader	CleanerFileReader scans log files for INs and LNs.
DbOpReplicationContext	This subclass of ReplicationContext adds information specific to database operations to the replication context passed from operation-aware code down the the logging layer.
DumpFileReader	The DumpFileReader prints every log entry to stdout.
FileCacheWarmer	Warm-up the file system cache during startup, for some portion of the log that is not being read by recovery.
FileHandle	A FileHandle embodies a File and its accompanying latch.
FileHeader	A FileHeader embodies the header information at the beginning of each log file.
FileManager	The FileManager presents the abstraction of one contiguous file.
FileManager.DefaultRandomAccessFile	The RandomAccessFile for production use.
FileReader	A FileReader is an abstract class that traverses the log files, reading-in chunks of the file at a time.
FileReader.ReadWindow	A ReadWindow provides a swath of data read from the JE log.
INFileReader	INFileReader supports recovery by scanning log files during the IN rebuild pass.
LastFileReader	LastFileReader traverses the last log file, doing checksums and looking for the end of the log.
LNFileReader	LNFileReader scans log files for LNs.
LogBuffer	LogBuffers hold outgoing, newly written log entries.
LogEntryHeader	A LogEntryHeader embodies the header information at the beginning of each log entry file.
LogEntryType	LogEntryType is an enumeration of all log entry types.
LogFlusher	Flush the log buffers (and write queue) periodically to disk and to the file system, as specified by EnvironmentConfig.LOG_FLUSH_SYNC_INTERVAL and EnvironmentConfig.LOG_FLUSH_NO_SYNC_INTERVAL.
LogItem	Values returned when a item is logged.
LogManager	The LogManager supports reading and writing to the JE log.
LogParams	Parameters passed when an item is logged.
LogStatDefinition	Per-stat Metadata for JE FileManager, FSyncManager, LogManager and LogBufferPool statistics.
LogUtils	This class holds convenience methods for marshalling internal JE data to and from the log.
LogUtils.XidImpl
PrintFileReader	The PrintFileReader prints out the target log entries.
ReplicationContext	ReplicationContext provides context about high-level operations so that the logging level can determine which replication related actions are required for a given Loggable item.
RestoreMarker	A RestoreMarker is a file that indicates that a normal recovery is not possible, because the log files are physically or semantically inconsistent in some way.
ScavengerFileReader	A ScavengerFileReader reads the log backwards.
SearchFileReader	SearchFileReader searches for the a given entry type.
StatsFileReader	The StatsFileReader generates stats about the log entries read, such as the count of each type of entry, the number of bytes, minimum and maximum sized log entry.
Trace	Trace logs event tracing messages into .jdb files.
UtilizationFileReader	Summarizes the utilized and unutilized portion of each log file by examining each log entry.
VLSNDistributionReader	This is a debugging utility which implements the unadvertised DbPrintLog -vd option, which displays VLSN distribution in a log.
WholeEntry	This class packages the log entry header and the log entry "contents" together for the use of components that need information from both parts.

Enum Summary

Enum	Description
FileManager.FileMode
Provisional	Specifies whether to log an entry provisionally.

Exception Summary

Exception	Description
ChecksumException	Indicates that a checksum validation failed.
ErasedException	Indicates that an erased entry was encountered when fetching a log entry, presumably because its LSN appears in the active Btree.
FileReader.EOFException	Never seen by user, used to indicate that the file reader should stop.
RestoreMarker.FileCreationException	Internal exception used to distinguish marker file creation from other IOErrors.

Package com.sleepycat.je.log Description

INTERNAL: Low level data storage including log entry sequential logging/writing, random reading/fetching, and sequential reading.