Package org.apache.cassandra.db.commitlog

Class CommitLogSegmentManagerCDC

java.lang.Object

org.apache.cassandra.db.commitlog.AbstractCommitLogSegmentManager

org.apache.cassandra.db.commitlog.CommitLogSegmentManagerCDC

public class CommitLogSegmentManagerCDC
extends AbstractCommitLogSegmentManager

Constructor Summary

Constructors

Constructor	Description
CommitLogSegmentManagerCDC(CommitLog commitLog, java.lang.String storageDirectory)

Method Summary

Modifier and Type	Method	Description
void	addCDCSize(long size)	For use after replay when replayer hard-links / adds tracking of replayed segments
CommitLogSegment.Allocation	allocate(Mutation mutation, int size)	Reserve space in the current segment for the provided mutation or, if there isn't space available, create a new segment.
CommitLogSegment	createSegment()	On segment creation, flag whether the segment should accept CDC mutations or not based on the total currently allocated unflushed CDC segments and the contents of cdc_raw Synchronized on this
long	deleteOldLinkedCDCCommitLogSegment(long bytesToFree)	Delete the oldest hard-linked CDC commit log segment to free up space.
void	discard(CommitLogSegment segment, boolean delete)
void	shutdown()	Initiates the shutdown process for the management thread.
long	updateCDCTotalSize()	Only use for testing / validation that size tracker is working.

Methods inherited from class org.apache.cassandra.db.commitlog.AbstractCommitLogSegmentManager

awaitManagementTasksCompletion, awaitTermination, getActiveSegments, onDiskSize, stopUnsafe, sync

Methods inherited from class java.lang.Object

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

Constructor Detail

CommitLogSegmentManagerCDC

public CommitLogSegmentManagerCDC(CommitLog commitLog,
                                  java.lang.String storageDirectory)

Method Detail

discard

public void discard(CommitLogSegment segment,
                    boolean delete)

deleteOldLinkedCDCCommitLogSegment

public long deleteOldLinkedCDCCommitLogSegment(long bytesToFree)

Delete the oldest hard-linked CDC commit log segment to free up space.

Parameters:

bytesToFree - the minimum space to free up

Returns:

total size under the CDC folder in bytes after deletion

shutdown

public void shutdown()

Initiates the shutdown process for the management thread. Also stops the cdc on-disk size calculator executor.

Overrides:

shutdown in class AbstractCommitLogSegmentManager

allocate

public CommitLogSegment.Allocation allocate(Mutation mutation,
                                            int size)
                                     throws CDCWriteException

Reserve space in the current segment for the provided mutation or, if there isn't space available, create a new segment. For CDC mutations, allocation is expected to throw WTE if the segment disallows CDC mutations.

Specified by:

allocate in class AbstractCommitLogSegmentManager

Parameters:

mutation - Mutation to allocate in segment manager

size - total size (overhead + serialized) of mutation

Returns:

the created Allocation object

Throws:

CDCWriteException - If segment disallows CDC mutations, we throw

createSegment

public CommitLogSegment createSegment()

On segment creation, flag whether the segment should accept CDC mutations or not based on the total currently allocated unflushed CDC segments and the contents of cdc_raw Synchronized on this

Overrides:

createSegment in class AbstractCommitLogSegmentManager

addCDCSize

public void addCDCSize(long size)

For use after replay when replayer hard-links / adds tracking of replayed segments

updateCDCTotalSize

public long updateCDCTotalSize()

Only use for testing / validation that size tracker is working. Not for production use.