Package com.sleepycat.je.log

Provides classes and interfaces for the JDB log subsystem.

See: Description

Interface Summary

Interface	Description
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.

Class Summary

Class	Description
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.
FileHandle	A FileHandle embodies a File and its accompanying latch.
FileHandleSource	FileHandleSource is a file source built on top of a cached file handle.
FileHeader	A FileHeader embodies the header information at the beginning of each log file.
FileManager	The FileManager presents the abstraction of one contiguous file.
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 swathe of data read from the JE log.
FileSource	FileSource is used as a channel to a log file when faulting in objects from the log.
FSyncManager
FSyncManager.FSyncGroup
INFileReader	INFileReader supports recovery by scanning log files during the IN rebuild pass.
JEFileFilter	JEFileFilters are used for listing je files.
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.
LogBufferPool	LogBufferPool keeps a set of log buffers.
LogContext	Context parameters that apply to all logged items when multiple items are logged in one log operation.
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.
LogItem	Item parameters that apply to a single logged item.
LogManager	The LogManager supports reading and writing to the JE log.
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.
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.
StatsFileReader.CheckpointCounter
StatsFileReader.EntryInfo
StatsFileReader.LogEntryTypeComparator
SyncedLogManager	The SyncedLogManager uses the synchronized keyword to implement protected regions.
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
LogEntryType.Marshall
LogEntryType.NodeType
LogEntryType.Replicable
LogEntryType.Txnal
Provisional	Specifies whether to log an entry provisionally.

Exception Summary

Exception	Description
ChecksumException	Indicates that a checksum validation failed.
FileReader.EOFException	Never seen by user, used to indicate that the file reader should stop.

Package com.sleepycat.je.log Description

Provides classes and interfaces for the JDB log subsystem.

Package Specification

(None)