org.iq80.leveldb.impl

Class VersionSet

java.lang.Object

org.iq80.leveldb.impl.VersionSet

public class VersionSet
extends Object

Constructor Summary

Constructors

Constructor and Description
VersionSet(Options options, File databaseDir, TableCache tableCache, InternalKeyComparator internalKeyComparator, Env env)

Method Summary

Modifier and Type	Method and Description
Compaction	compactRange(int level, InternalKey begin, InternalKey end)
long	expandedCompactionByteSizeLimit() Maximum number of bytes in all compacted files.
Version	getCurrent()
InternalKeyComparator	getInternalKeyComparator()
long	getLastSequence()
List<FileMetaData>	getLiveFiles()
long	getLogNumber()
long	getManifestFileNumber()
long	getMaxNextLevelOverlappingBytes()
long	getNextFileNumber()
long	getPrevLogNumber()
TableCache	getTableCache()
MergingIterator	iterator(ReadOptions options)
CharSequence	levelSummary()
void	logAndApply(VersionEdit edit, ReentrantLock mutex)
MergingIterator	makeInputIterator(Compaction c)
long	maxFileSizeForLevel()
long	maxGrandParentOverlapBytes() Maximum bytes of overlaps in grandparent (i.e., level+2) before we stop building a single file in a level->level+1 compaction.
boolean	needsCompaction()
long	numberOfBytesInLevel(int level)
int	numberOfFilesInLevel(int level)
boolean	overlapInLevel(int level, Slice smallestUserKey, Slice largestUserKey)
Compaction	pickCompaction()
boolean	recover()
void	release()
void	removeVersion(Version version)
void	setLastSequence(long newLastSequence)
long	targetFileSize()
long	totalFileSize(List<FileMetaData> files)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

VersionSet

public VersionSet(Options options,
                  File databaseDir,
                  TableCache tableCache,
                  InternalKeyComparator internalKeyComparator,
                  Env env)
           throws IOException

Throws:

IOException

Method Detail

release

public void release()
             throws IOException

Throws:

IOException

removeVersion

public void removeVersion(Version version)

getInternalKeyComparator

public InternalKeyComparator getInternalKeyComparator()

getTableCache

public TableCache getTableCache()

getCurrent

public Version getCurrent()

getManifestFileNumber

public long getManifestFileNumber()

getNextFileNumber

public long getNextFileNumber()

getLogNumber

public long getLogNumber()

getPrevLogNumber

public long getPrevLogNumber()

iterator

public MergingIterator iterator(ReadOptions options)
                         throws IOException

Throws:

IOException

makeInputIterator

public MergingIterator makeInputIterator(Compaction c)
                                  throws IOException

Throws:

IOException

overlapInLevel

public boolean overlapInLevel(int level,
                              Slice smallestUserKey,
                              Slice largestUserKey)

numberOfFilesInLevel

public int numberOfFilesInLevel(int level)

numberOfBytesInLevel

public long numberOfBytesInLevel(int level)

getLastSequence

public long getLastSequence()

setLastSequence

public void setLastSequence(long newLastSequence)

logAndApply

public void logAndApply(VersionEdit edit,
                        ReentrantLock mutex)
                 throws IOException

Throws:

IOException

recover

public boolean recover()
                throws IOException

Returns:

true if manifest should be saved, false otherwise

Throws:

IOException

getLiveFiles

public List<FileMetaData> getLiveFiles()

targetFileSize

public long targetFileSize()

maxGrandParentOverlapBytes

public long maxGrandParentOverlapBytes()

Maximum bytes of overlaps in grandparent (i.e., level+2) before we stop building a single file in a level->level+1 compaction.

expandedCompactionByteSizeLimit

public long expandedCompactionByteSizeLimit()

Maximum number of bytes in all compacted files. We avoid expanding the lower level file set of a compaction if it would make the total compaction cover more than this many bytes.

maxFileSizeForLevel

public long maxFileSizeForLevel()

totalFileSize

public long totalFileSize(List<FileMetaData> files)

needsCompaction

public boolean needsCompaction()

compactRange

public Compaction compactRange(int level,
                               InternalKey begin,
                               InternalKey end)

pickCompaction

public Compaction pickCompaction()

getMaxNextLevelOverlappingBytes

public long getMaxNextLevelOverlappingBytes()

levelSummary

public CharSequence levelSummary()