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:

java.lang.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 and Description
protected static org.slf4j.Logger	logger

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

cfs, directories, estimatedTotalKeys, maxAge, minRepairedAt, nonExpiredSSTables, sstableWriter, txn

Constructor Summary

Constructors

Constructor and Description
DefaultCompactionWriter(ColumnFamilyStore cfs, Directories directories, LifecycleTransaction txn, java.util.Set<SSTableReader> nonExpiredSSTables)
DefaultCompactionWriter(ColumnFamilyStore cfs, Directories directories, LifecycleTransaction txn, java.util.Set<SSTableReader> nonExpiredSSTables, boolean offline, boolean keepOriginals)

Method Summary

Modifier and Type	Method and Description
long	estimatedKeys() estimated number of keys we should write
boolean	realAppend(UnfilteredRowIterator partition)
protected void	switchCompactionLocation(Directories.DataDirectory directory) Implementations of this method should finish the current sstable writer and start writing to this directory.

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

append, doAbort, doCommit, doPostCleanup, doPrepare, finish, getDirectories, getExpectedWriteSize, getWriteDirectory, maybeSwitchWriter

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 Detail

logger

protected static final org.slf4j.Logger logger

Constructor Detail

DefaultCompactionWriter

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

DefaultCompactionWriter

public DefaultCompactionWriter(ColumnFamilyStore cfs,
                               Directories directories,
                               LifecycleTransaction txn,
                               java.util.Set<SSTableReader> nonExpiredSSTables,
                               boolean offline,
                               boolean keepOriginals)

Method Detail

realAppend

public boolean realAppend(UnfilteredRowIterator partition)

Specified by:

realAppend in class CompactionAwareWriter

switchCompactionLocation

protected void switchCompactionLocation(Directories.DataDirectory directory)

Description copied from class: CompactionAwareWriter

Implementations of this method should finish the current sstable writer and start writing to this directory. Called once before starting to append and then whenever we see a need to start writing to another directory.

Specified by:

switchCompactionLocation in class CompactionAwareWriter

estimatedKeys

public long estimatedKeys()

Description copied from class: CompactionAwareWriter

estimated number of keys we should write

Overrides:

estimatedKeys in class CompactionAwareWriter