org.apache.cassandra.db

Class RowIndexEntry<T>

java.lang.Object

org.apache.cassandra.db.RowIndexEntry<T>

All Implemented Interfaces:

IMeasurableMemory

public class RowIndexEntry<T>
extends java.lang.Object
implements IMeasurableMemory

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	RowIndexEntry.IndexSerializer<T>
static class	RowIndexEntry.Serializer

Field Summary

Fields

Modifier and Type	Field and Description
long	position

Constructor Summary

Constructors

Constructor and Description
RowIndexEntry(long position)

Method Summary

Modifier and Type	Method and Description
java.util.List<T>	columnsIndex()
static RowIndexEntry<IndexHelper.IndexInfo>	create(long position, DeletionTime deletionTime, ColumnIndex index)
DeletionTime	deletionTime()
long	headerLength() The length of the row header (partition key, partition deletion and static row).
long	headerOffset()
boolean	isIndexed()
protected int	promotedSize(IndexHelper.IndexInfo.Serializer idxSerializer)
long	unsharedHeapSize()

Methods inherited from class java.lang.Object

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

Field Detail

position

public final long position

Constructor Detail

RowIndexEntry

public RowIndexEntry(long position)

Method Detail

promotedSize

protected int promotedSize(IndexHelper.IndexInfo.Serializer idxSerializer)

create

public static RowIndexEntry<IndexHelper.IndexInfo> create(long position,
                                                          DeletionTime deletionTime,
                                                          ColumnIndex index)

isIndexed

public boolean isIndexed()

Returns:

true if this index entry contains the row-level tombstone and column summary. Otherwise, caller should fetch these from the row header.

deletionTime

public DeletionTime deletionTime()

headerOffset

public long headerOffset()

Returns:

the offset to the start of the header information for this row. For some formats this may not be the start of the row.

headerLength

public long headerLength()

The length of the row header (partition key, partition deletion and static row). This value is only provided for indexed entries and this method will throw UnsupportedOperationException if !isIndexed().

columnsIndex

public java.util.List<T> columnsIndex()

unsharedHeapSize

public long unsharedHeapSize()

Specified by:

unsharedHeapSize in interface IMeasurableMemory

Returns:

the amount of on-heap memory retained by the object that might be reclaimed if the object were reclaimed, i.e. it should try to exclude globally cached data where possible, or counting portions of arrays that are referenced by the object but used by other objects only (e.g. slabbed byte-buffers), etc.