Package org.apache.cassandra.db.compaction.writers

Class DefaultCompactionWriter

java.lang.Object

org.apache.cassandra.utils.concurrent.Transactional.AbstractTransactional

org.apache.cassandra.db.compaction.writers.CompactionAwareWriter

org.apache.cassandra.db.compaction.writers.DefaultCompactionWriter

All Implemented Interfaces:

AutoCloseable, Transactional

public class DefaultCompactionWriter
extends CompactionAwareWriter

The default compaction writer - creates one output file in L0

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.cassandra.utils.concurrent.Transactional.AbstractTransactional

Transactional.AbstractTransactional.State

Nested classes/interfaces inherited from interface org.apache.cassandra.utils.concurrent.Transactional

Transactional.AbstractTransactional

Field Summary

Fields

Modifier and Type	Field	Description
protected static final org.slf4j.Logger	logger

Fields inherited from class org.apache.cassandra.db.compaction.writers.CompactionAwareWriter

cfs, currentDirectory, directories, estimatedTotalKeys, isTransient, maxAge, minRepairedAt, nonExpiredSSTables, pendingRepair, sstableWriter, txn

Constructor Summary

Constructors

Constructor	Description
DefaultCompactionWriter(ColumnFamilyStore cfs, Directories directories, LifecycleTransaction txn, Set<SSTableReader> nonExpiredSSTables)
DefaultCompactionWriter(ColumnFamilyStore cfs, Directories directories, LifecycleTransaction txn, Set<SSTableReader> nonExpiredSSTables, boolean keepOriginals, int sstableLevel)

Method Summary

Modifier and Type	Method	Description
protected boolean	shouldSwitchWriterInCurrentLocation(DecoratedKey key)	Returns true if the writer should be switched for reasons other than switching to a new data directory (e.g.
protected long	sstableKeyCount()	Returns the key count with which created sstables should be set up.
protected int	sstableLevel()	Returns the level that should be used when creating sstables.

Methods inherited from class org.apache.cassandra.db.compaction.writers.CompactionAwareWriter

append, doAbort, doCommit, doPostCleanup, doPrepare, estimatedKeys, finish, getDirectories, getExpectedWriteSize, getSStableDirectory, getWriteDirectory, maybeSwitchLocation, maybeSwitchWriter, newWriterBuilder, realAppend, setRepairedAt, sstableWriter, switchCompactionWriter

Methods inherited from class org.apache.cassandra.utils.concurrent.Transactional.AbstractTransactional

abort, abort, close, commit, commit, doPreCleanup, prepareToCommit, state

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.cassandra.utils.concurrent.Transactional

abort, close, commit, prepareToCommit

Field Details

logger

protected static final org.slf4j.Logger logger

Constructor Details

DefaultCompactionWriter

public DefaultCompactionWriter(ColumnFamilyStore cfs,
 Directories directories,
 LifecycleTransaction txn,
 Set<SSTableReader> nonExpiredSSTables)

DefaultCompactionWriter

public DefaultCompactionWriter(ColumnFamilyStore cfs,
 Directories directories,
 LifecycleTransaction txn,
 Set<SSTableReader> nonExpiredSSTables,
 boolean keepOriginals,
 int sstableLevel)

Method Details

shouldSwitchWriterInCurrentLocation

protected boolean shouldSwitchWriterInCurrentLocation(DecoratedKey key)

Description copied from class: CompactionAwareWriter

Returns true if the writer should be switched for reasons other than switching to a new data directory (e.g. because an sstable size limit has been reached).

Specified by:

shouldSwitchWriterInCurrentLocation in class CompactionAwareWriter

sstableLevel

protected int sstableLevel()

Description copied from class: CompactionAwareWriter

Returns the level that should be used when creating sstables.

Overrides:

sstableLevel in class CompactionAwareWriter

sstableKeyCount

protected long sstableKeyCount()

Description copied from class: CompactionAwareWriter

Returns the key count with which created sstables should be set up.

Specified by:

sstableKeyCount in class CompactionAwareWriter