org.apache.cassandra.db.commitlog

Class CommitLogReplayer

java.lang.Object

org.apache.cassandra.db.commitlog.CommitLogReplayer

public class CommitLogReplayer
extends java.lang.Object

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	CommitLogReplayer.CommitLogReplayException

Method Summary

Modifier and Type	Method and Description
int	blockForWrites()
static CommitLogReplayer	construct(CommitLog commitLog)
static ReplayPosition	firstNotCovered(java.util.Collection<IntervalSet<ReplayPosition>> ranges) Find the earliest commit log position that is not covered by the known flushed ranges for some table.
boolean	logAndCheckIfShouldSkip(java.io.File file, CommitLogDescriptor desc)
static IntervalSet<ReplayPosition>	persistedIntervals(java.lang.Iterable<SSTableReader> onDisk, ReplayPosition truncatedAt) A set of known safe-to-discard commit log replay positions, based on the range covered by on disk sstables and those prior to the most recent truncation record
protected boolean	pointInTimeExceeded(Mutation fm)
void	recover(java.io.File[] clogs)
void	recover(java.io.File file, boolean tolerateTruncation)

Methods inherited from class java.lang.Object

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

Method Detail

construct

public static CommitLogReplayer construct(CommitLog commitLog)

recover

public void recover(java.io.File[] clogs)
             throws java.io.IOException

Throws:

java.io.IOException

persistedIntervals

public static IntervalSet<ReplayPosition> persistedIntervals(java.lang.Iterable<SSTableReader> onDisk,
                                                             ReplayPosition truncatedAt)

A set of known safe-to-discard commit log replay positions, based on the range covered by on disk sstables and those prior to the most recent truncation record

firstNotCovered

public static ReplayPosition firstNotCovered(java.util.Collection<IntervalSet<ReplayPosition>> ranges)

Find the earliest commit log position that is not covered by the known flushed ranges for some table. For efficiency this assumes that the first contiguously flushed interval we know of contains the moment that the given table was constructed* and hence we can start replay from the end of that interval. If such an interval is not known, we must replay from the beginning. * This is not true only until if the very first flush of a table stalled or failed, while the second or latter succeeded. The chances of this happening are at most very low, and if the assumption does prove to be incorrect during replay there is little chance that the affected deployment is in production.

blockForWrites

public int blockForWrites()

recover

public void recover(java.io.File file,
                    boolean tolerateTruncation)
             throws java.io.IOException

Throws:

java.io.IOException

logAndCheckIfShouldSkip

public boolean logAndCheckIfShouldSkip(java.io.File file,
                                       CommitLogDescriptor desc)

pointInTimeExceeded

protected boolean pointInTimeExceeded(Mutation fm)