org.apache.jackrabbit.oak.segment

Class SegmentTracker

java.lang.Object

org.apache.jackrabbit.oak.segment.SegmentTracker

public class SegmentTracker
extends Object

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 and Description
SegmentTracker()

Method Summary

Modifier and Type	Method and Description
void	clearSegmentIdTables(Set<UUID> reclaimed, String gcInfo)
Set<SegmentId>	getReferencedSegmentIds() Returns all segment identifiers that are currently referenced in memory.
com.google.common.base.Supplier<Integer>	getSegmentCounter() Number of segment tracked since this tracker was instantiated
SegmentId	newBulkSegmentId(SegmentIdFactory maker) Create and track a new segment id for bulk segments.
SegmentId	newDataSegmentId(SegmentIdFactory maker) Create and track a new segment id for data segments.
SegmentId	newSegmentId(long msb, long lsb, SegmentIdFactory maker) 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()

Method Detail

getSegmentCounter

public com.google.common.base.Supplier<Integer> getSegmentCounter()

Number of segment tracked since this tracker was instantiated

Returns:

count

getReferencedSegmentIds

public Set<SegmentId> getReferencedSegmentIds()

Returns all segment identifiers that are currently referenced in memory.

Returns:

referenced segment identifiers

newSegmentId

@Nonnull
public SegmentId newSegmentId(long msb,
                                       long lsb,
                                       SegmentIdFactory maker)

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

Parameters:

msb - most significant bits of the segment id

lsb - least significant bits of the segment id

maker - A non-null instance of SegmentIdFactory.

Returns:

the segment id

newDataSegmentId

@Nonnull
public SegmentId newDataSegmentId(SegmentIdFactory maker)

Create and track a new segment id for data segments.

Parameters:

maker - A non-null instance of SegmentIdFactory.

Returns:

the segment id

newBulkSegmentId

@Nonnull
public SegmentId newBulkSegmentId(SegmentIdFactory maker)

Create and track a new segment id for bulk segments.

Parameters:

maker - A non-null instance of SegmentIdFactory.

Returns:

the segment id

clearSegmentIdTables

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