Package org.apache.jackrabbit.oak.segment

Class SegmentTracker

java.lang.Object

org.apache.jackrabbit.oak.segment.SegmentTracker

All Implemented Interfaces:

SegmentIdProvider

public class SegmentTracker
extends Object
implements SegmentIdProvider

Tracker of references to segment identifiers and segment instances that are currently kept in memory and factory for creating SegmentId instances.

Constructor Summary

Constructors

Constructor	Description
SegmentTracker(@NotNull SegmentIdFactory segmentIdFactory)

Method Summary

Modifier and Type	Method	Description
void	clearSegmentIdTables(@NotNull Set<UUID> reclaimed, @NotNull String gcInfo)
Set<SegmentId>	getReferencedSegmentIds()	Returns all segment identifiers that are currently referenced in memory.
int	getSegmentIdCount()
@NotNull SegmentId	newBulkSegmentId()	Create and track a new segment id for bulk segments.
@NotNull SegmentId	newDataSegmentId()	Create and track a new segment id for data segments.
@NotNull SegmentId	newSegmentId(long msb, long lsb)	Get an existing SegmentId with the given msb and lsb or create a new one if no such id exists with this tracker.

Methods inherited from class java.lang.Object

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

Constructor Detail

SegmentTracker

public SegmentTracker(@NotNull
                      @NotNull SegmentIdFactory segmentIdFactory)

Method Detail

getSegmentIdCount

public int getSegmentIdCount()

Specified by:

getSegmentIdCount in interface SegmentIdProvider

Returns:

The number of distinct segment ids this provider is tracking.

getReferencedSegmentIds

public Set<SegmentId> getReferencedSegmentIds()

Returns all segment identifiers that are currently referenced in memory.

Returns:

referenced segment identifiers

newSegmentId

@NotNull
public @NotNull SegmentId newSegmentId(long msb,
                                       long lsb)

Get an existing SegmentId with the given msb and lsb or create a new one if no such id exists with this tracker.

Specified by:

newSegmentId in interface SegmentIdProvider

Parameters:

msb - most significant bits of the segment id

lsb - least significant bits of the segment id

Returns:

the segment id

newDataSegmentId

@NotNull
public @NotNull SegmentId newDataSegmentId()

Create and track a new segment id for data segments.

Specified by:

newDataSegmentId in interface SegmentIdProvider

Returns:

the segment id

newBulkSegmentId

@NotNull
public @NotNull SegmentId newBulkSegmentId()

Create and track a new segment id for bulk segments.

Specified by:

newBulkSegmentId in interface SegmentIdProvider

Returns:

the segment id

clearSegmentIdTables

public void clearSegmentIdTables(@NotNull
                                 @NotNull Set<UUID> reclaimed,
                                 @NotNull
                                 @NotNull String gcInfo)