org.apache.cassandra.db.view

Class TableViews

java.lang.Object

java.util.AbstractCollection<View>

org.apache.cassandra.db.view.TableViews

All Implemented Interfaces:

java.lang.Iterable<View>, java.util.Collection<View>

public class TableViews
extends java.util.AbstractCollection<View>

Groups all the views for a given table.

Constructor Summary

Constructors

Constructor and Description
TableViews(TableId id)

Method Summary

Modifier and Type	Method and Description
boolean	add(View view)
java.lang.Iterable<ColumnFamilyStore>	allViewsCfs()
void	build()
boolean	contains(java.lang.String viewName)
void	dumpMemtables()
void	forceBlockingFlush()
java.util.Iterator<java.util.Collection<Mutation>>	generateViewUpdates(java.util.Collection<View> views, UnfilteredRowIterator updates, UnfilteredRowIterator existings, int nowInSec, boolean separateUpdates) Given some updates on the base table of this object and the existing values for the rows affected by that update, generates the mutation to be applied to the provided views.
boolean	hasViews()
java.util.Iterator<View>	iterator()
void	pushViewReplicaUpdates(PartitionUpdate update, boolean writeCommitLog, java.util.concurrent.atomic.AtomicLong baseComplete) Calculates and pushes updates to the views replicas.
void	removeByName(java.lang.String viewName)
int	size()
void	stopBuild()
void	truncateBlocking(CommitLogPosition replayAfter, long truncatedAt)
java.util.Collection<View>	updatedViews(PartitionUpdate updates) Return the views that are potentially updated by the provided updates.

Methods inherited from class java.util.AbstractCollection

addAll, clear, contains, containsAll, isEmpty, remove, removeAll, retainAll, toArray, toArray, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Collection

equals, hashCode, parallelStream, removeIf, spliterator, stream

Methods inherited from interface java.lang.Iterable

forEach

Constructor Detail

TableViews

public TableViews(TableId id)

Method Detail

hasViews

public boolean hasViews()

size

public int size()

Specified by:

size in interface java.util.Collection<View>

Specified by:

size in class java.util.AbstractCollection<View>

iterator

public java.util.Iterator<View> iterator()

Specified by:

iterator in interface java.lang.Iterable<View>

Specified by:

iterator in interface java.util.Collection<View>

Specified by:

iterator in class java.util.AbstractCollection<View>

contains

public boolean contains(java.lang.String viewName)

add

public boolean add(View view)

Specified by:

add in interface java.util.Collection<View>

Overrides:

add in class java.util.AbstractCollection<View>

allViewsCfs

public java.lang.Iterable<ColumnFamilyStore> allViewsCfs()

build

public void build()

stopBuild

public void stopBuild()

forceBlockingFlush

public void forceBlockingFlush()

dumpMemtables

public void dumpMemtables()

truncateBlocking

public void truncateBlocking(CommitLogPosition replayAfter,
                             long truncatedAt)

removeByName

public void removeByName(java.lang.String viewName)

pushViewReplicaUpdates

public void pushViewReplicaUpdates(PartitionUpdate update,
                                   boolean writeCommitLog,
                                   java.util.concurrent.atomic.AtomicLong baseComplete)

Calculates and pushes updates to the views replicas. The replicas are determined by ViewUtils#getViewNaturalEndpoint(String, Token, Token).

Parameters:

update - an update on the base table represented by this object.

writeCommitLog - whether we should write the commit log for the view updates.

baseComplete - time from epoch in ms that the local base mutation was (or will be) completed

generateViewUpdates

public java.util.Iterator<java.util.Collection<Mutation>> generateViewUpdates(java.util.Collection<View> views,
                                                                              UnfilteredRowIterator updates,
                                                                              UnfilteredRowIterator existings,
                                                                              int nowInSec,
                                                                              boolean separateUpdates)

Given some updates on the base table of this object and the existing values for the rows affected by that update, generates the mutation to be applied to the provided views.

Parameters:

views - the views potentially affected by updates.

updates - the base table updates being applied.

existings - the existing values for the rows affected by updates. This is used to decide if a view is obsoleted by the update and should be removed, gather the values for columns that may not be part of the update if a new view entry needs to be created, and compute the minimal updates to be applied if the view entry isn't changed but has simply some updated values. This will be empty for view building as we want to assume anything we'll pass to updates is new.

nowInSec - the current time in seconds.

separateUpdates, - if false, mutation is per partition.

Returns:

the mutations to apply to the views. This can be empty.

updatedViews

public java.util.Collection<View> updatedViews(PartitionUpdate updates)

Return the views that are potentially updated by the provided updates.

Parameters:

updates - the updates applied to the base table.

Returns:

the views affected by updates.