Package org.apache.cassandra.db.virtual

Class AbstractVirtualTable

java.lang.Object

org.apache.cassandra.db.virtual.AbstractVirtualTable

All Implemented Interfaces:

VirtualTable

Direct Known Subclasses:

AbstractMutableVirtualTable, AbstractVirtualTable.SimpleTable, BatchMetricsTable, CIDRFilteringMetricsTable.CIDRFilteringMetricsCountsTable, CIDRFilteringMetricsTable.CIDRFilteringMetricsLatenciesTable, ColumnIndexesSystemView, InternodeInboundTable, InternodeOutboundTable, SegmentsSystemView, SettingsTable, SnapshotsTable, SSTableIndexesSystemView, StreamingVirtualTable

public abstract class AbstractVirtualTable
extends Object
implements VirtualTable

An abstract virtual table implementation that builds the resultset on demand.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	AbstractVirtualTable.AbstractDataSet	An abstract, map-backed DataSet implementation.
static interface	AbstractVirtualTable.DataSet
static interface	AbstractVirtualTable.Partition
static class	AbstractVirtualTable.SimpleTable

Field Summary

Fields

Modifier and Type	Field	Description
protected final TableMetadata	metadata

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	AbstractVirtualTable(TableMetadata metadata)

Method Summary

Modifier and Type	Method	Description
void	apply(PartitionUpdate update)	Applies the specified update, if supported.
abstract AbstractVirtualTable.DataSet	data()	Provide a AbstractVirtualTable.DataSet that is contains all of the virtual table's data.
AbstractVirtualTable.DataSet	data(DecoratedKey partitionKey)	Provide a AbstractVirtualTable.DataSet that is potentially restricted to the provided partition - but is allowed to contain other partitions.
TableMetadata	metadata()	Returns the view metadata.
final UnfilteredPartitionIterator	select(DataRange dataRange, ColumnFilter columnFilter)	Selects the rows from a range of partitions.
final UnfilteredPartitionIterator	select(DecoratedKey partitionKey, ClusteringIndexFilter clusteringIndexFilter, ColumnFilter columnFilter)	Selects the rows from a single partition.
String	toString()
void	truncate()	Truncates data from the underlying source, if supported.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.cassandra.db.virtual.VirtualTable

allowFilteringImplicitly, name

Field Details

metadata

protected final TableMetadata metadata

Constructor Details

AbstractVirtualTable

protected AbstractVirtualTable(TableMetadata metadata)

Method Details

metadata

public TableMetadata metadata()

Description copied from interface: VirtualTable

Returns the view metadata.

Specified by:

metadata in interface VirtualTable

Returns:

the view metadata.

data

public abstract AbstractVirtualTable.DataSet data()

Provide a AbstractVirtualTable.DataSet that is contains all of the virtual table's data.

data

public AbstractVirtualTable.DataSet data(DecoratedKey partitionKey)

Provide a AbstractVirtualTable.DataSet that is potentially restricted to the provided partition - but is allowed to contain other partitions.

select

public final UnfilteredPartitionIterator select(DecoratedKey partitionKey,
 ClusteringIndexFilter clusteringIndexFilter,
 ColumnFilter columnFilter)

Description copied from interface: VirtualTable

Selects the rows from a single partition.

Specified by:

select in interface VirtualTable

Parameters:

partitionKey - the partition key

clusteringIndexFilter - the clustering columns to selected

columnFilter - the selected columns

Returns:

the rows corresponding to the requested data.

select

public final UnfilteredPartitionIterator select(DataRange dataRange,
 ColumnFilter columnFilter)

Description copied from interface: VirtualTable

Selects the rows from a range of partitions.

Specified by:

select in interface VirtualTable

Parameters:

dataRange - the range of data to retrieve

columnFilter - the selected columns

Returns:

the rows corresponding to the requested data.

apply

public void apply(PartitionUpdate update)

Description copied from interface: VirtualTable

Applies the specified update, if supported.

Specified by:

apply in interface VirtualTable

Parameters:

update - the update to apply

truncate

public void truncate()

Description copied from interface: VirtualTable

Truncates data from the underlying source, if supported.

Specified by:

truncate in interface VirtualTable

toString

public String toString()

Overrides:

toString in class Object