org.apache.ignite.internal.processors.affinity

Class GridAffinityAssignmentCache

java.lang.Object

org.apache.ignite.internal.processors.affinity.GridAffinityAssignmentCache

public class GridAffinityAssignmentCache
extends Object

Affinity cached function.

Field Summary

Fields

Modifier and Type	Field and Description
static int	DFLT_AFFINITY_HISTORY_SIZE
static float	DFLT_PART_DISTRIBUTION_WARN_THRESHOLD

Method Summary

Modifier and Type	Method and Description
List<List<ClusterNode>>	assignments(AffinityTopologyVersion topVer)
Set<Integer>	backupPartitions(UUID nodeId, AffinityTopologyVersion topVer) Get backup partitions for specified node ID.
AffinityAssignment	cachedAffinity(AffinityTopologyVersion topVer) Get cached affinity for specified topology version.
AffinityAssignment	cachedAffinity(AffinityTopologyVersion topVer, AffinityTopologyVersion lastAffChangeTopVer) Get cached affinity for specified topology version.
NavigableSet<AffinityTopologyVersion>	cachedVersions()
String	cacheOrGroupName()
IdealAffinityAssignment	calculate(AffinityTopologyVersion topVer, @Nullable ExchangeDiscoveryEvents events, @Nullable DiscoCache discoCache) Calculates ideal assignment for given topology version and events happened since last calculation.
void	cancelFutures(IgniteCheckedException err) Kernal stop callback.
boolean	centralizedAffinityFunction()
void	clientEventTopologyChange(DiscoveryEvent evt, AffinityTopologyVersion topVer) Copies previous affinity assignment when discovery event does not cause affinity assignment changes (e.g. client node joins on leaves).
static GridAffinityAssignmentCache	create(GridKernalContext ctx, AffinityFunction aff, CacheConfiguration<?,?> ccfg)
boolean	dumpDebugInfo() Dumps debug information.
int	groupId()
@Nullable IdealAffinityAssignment	idealAssignment()
void	idealAssignment(AffinityTopologyVersion topVer, List<List<ClusterNode>> assignment)
@Nullable List<List<ClusterNode>>	idealAssignmentRaw()
void	init(GridAffinityAssignmentCache aff)
void	initialize(AffinityTopologyVersion topVer, List<List<ClusterNode>> affAssignment) Initializes affinity with given topology version and assignment.
AffinityAssignment	lastReadyAffinity()
AffinityTopologyVersion	lastVersion()
List<ClusterNode>	nodes(int part, AffinityTopologyVersion topVer) Gets affinity nodes for specified partition.
void	onReconnected()
Set<Integer>	partitionPrimariesDifferentToIdeal(AffinityTopologyVersion topVer)
int	partitions()
boolean	primaryChanged(int part, AffinityTopologyVersion startVer, AffinityTopologyVersion endVer)
Set<Integer>	primaryPartitions(UUID nodeId, AffinityTopologyVersion topVer) Get primary partitions for specified node ID.
AffinityAssignment	readyAffinity(AffinityTopologyVersion topVer)
List<List<ClusterNode>>	readyAssignments(AffinityTopologyVersion topVer)
@Nullable IgniteInternalFuture<AffinityTopologyVersion>	readyFuture(AffinityTopologyVersion topVer) Gets future that will be completed after topology with version topVer is calculated.
Object	similarAffinityKey()

Methods inherited from class java.lang.Object

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

Field Detail

DFLT_AFFINITY_HISTORY_SIZE

public static final int DFLT_AFFINITY_HISTORY_SIZE

See Also:

IgniteSystemProperties.IGNITE_AFFINITY_HISTORY_SIZE, Constant Field Values

DFLT_PART_DISTRIBUTION_WARN_THRESHOLD

public static final float DFLT_PART_DISTRIBUTION_WARN_THRESHOLD

See Also:

IgniteSystemProperties.IGNITE_PART_DISTRIBUTION_WARN_THRESHOLD, Constant Field Values

Method Detail

create

public static GridAffinityAssignmentCache create(GridKernalContext ctx,
                                                 AffinityFunction aff,
                                                 CacheConfiguration<?,?> ccfg)

Parameters:

ctx - Kernal context.

aff - Initialized affinity function.

ccfg - Cache configuration.

Returns:

Affinity assignment cache instance.

similarAffinityKey

public Object similarAffinityKey()

Returns:

Key to find caches with similar affinity.

cacheOrGroupName

public String cacheOrGroupName()

Returns:

Group name if it is specified, otherwise cache name.

groupId

public int groupId()

Returns:

Cache group ID.

initialize

public void initialize(AffinityTopologyVersion topVer,
                       List<List<ClusterNode>> affAssignment)

Initializes affinity with given topology version and assignment.

Parameters:

topVer - Topology version.

affAssignment - Affinity assignment for topology version.

idealAssignment

public void idealAssignment(AffinityTopologyVersion topVer,
                            List<List<ClusterNode>> assignment)

Parameters:

assignment - Assignment.

idealAssignmentRaw

@Nullable
public @Nullable List<List<ClusterNode>> idealAssignmentRaw()

Returns:

Assignment.

idealAssignment

@Nullable
public @Nullable IdealAffinityAssignment idealAssignment()

centralizedAffinityFunction

public boolean centralizedAffinityFunction()

Returns:

True if affinity function has AffinityCentralizedFunction annotation.

cancelFutures

public void cancelFutures(IgniteCheckedException err)

Kernal stop callback.

Parameters:

err - Error.

onReconnected

public void onReconnected()

calculate

public IdealAffinityAssignment calculate(AffinityTopologyVersion topVer,
                                         @Nullable
                                         @Nullable ExchangeDiscoveryEvents events,
                                         @Nullable
                                         @Nullable DiscoCache discoCache)

Calculates ideal assignment for given topology version and events happened since last calculation.

Parameters:

topVer - Topology version to calculate affinity cache for.

events - Discovery events that caused this topology version change.

discoCache - Discovery cache.

Returns:

Ideal affinity assignment.

clientEventTopologyChange

public void clientEventTopologyChange(DiscoveryEvent evt,
                                      AffinityTopologyVersion topVer)

Copies previous affinity assignment when discovery event does not cause affinity assignment changes (e.g. client node joins on leaves).

Parameters:

evt - Event.

topVer - Topology version.

lastVersion

public AffinityTopologyVersion lastVersion()

Returns:

Last initialized affinity version.

lastReadyAffinity

public AffinityAssignment lastReadyAffinity()

Returns:

Last initialized affinity assignment.

assignments

public List<List<ClusterNode>> assignments(AffinityTopologyVersion topVer)

Parameters:

topVer - Topology version.

Returns:

Affinity assignment.

readyAssignments

public List<List<ClusterNode>> readyAssignments(AffinityTopologyVersion topVer)

Parameters:

topVer - Topology version.

Returns:

Affinity assignment.

readyFuture

@Nullable
public @Nullable IgniteInternalFuture<AffinityTopologyVersion> readyFuture(AffinityTopologyVersion topVer)

Gets future that will be completed after topology with version topVer is calculated.

Parameters:

topVer - Topology version to await for.

Returns:

Future that will be completed after affinity for topology version topVer is calculated.

partitions

public int partitions()

Returns:

Partition count.

nodes

public List<ClusterNode> nodes(int part,
                               AffinityTopologyVersion topVer)

Gets affinity nodes for specified partition.

Parameters:

part - Partition.

topVer - Topology version.

Returns:

Affinity nodes.

partitionPrimariesDifferentToIdeal

public Set<Integer> partitionPrimariesDifferentToIdeal(AffinityTopologyVersion topVer)

Parameters:

topVer - Topology version.

primaryPartitions

public Set<Integer> primaryPartitions(UUID nodeId,
                                      AffinityTopologyVersion topVer)

Get primary partitions for specified node ID.

Parameters:

nodeId - Node ID to get primary partitions for.

topVer - Topology version.

Returns:

Primary partitions for specified node ID.

backupPartitions

public Set<Integer> backupPartitions(UUID nodeId,
                                     AffinityTopologyVersion topVer)

Get backup partitions for specified node ID.

Parameters:

nodeId - Node ID to get backup partitions for.

topVer - Topology version.

Returns:

Backup partitions for specified node ID.

dumpDebugInfo

public boolean dumpDebugInfo()

Dumps debug information.

Returns:

True if there are pending futures.

readyAffinity

public AffinityAssignment readyAffinity(AffinityTopologyVersion topVer)

Parameters:

topVer - Topology version.

Returns:

Assignment.

Throws:

IllegalStateException - If affinity assignment is not initialized for the given topology version.

cachedAffinity

public AffinityAssignment cachedAffinity(AffinityTopologyVersion topVer)

Get cached affinity for specified topology version.

Parameters:

topVer - Topology version.

Returns:

Cached affinity.

Throws:

IllegalArgumentException - in case of the specified topology version topVer is earlier than affinity is calculated or the history of assignments is already cleaned.

cachedAffinity

public AffinityAssignment cachedAffinity(AffinityTopologyVersion topVer,
                                         AffinityTopologyVersion lastAffChangeTopVer)

Get cached affinity for specified topology version.

Parameters:

topVer - Topology version for which affinity assignment is requested.

lastAffChangeTopVer - Topology version of last affinity assignment change.

Returns:

Cached affinity.

Throws:

IllegalArgumentException - in case of the specified topology version topVer is earlier than affinity is calculated or the history of assignments is already cleaned.

primaryChanged

public boolean primaryChanged(int part,
                              AffinityTopologyVersion startVer,
                              AffinityTopologyVersion endVer)

Parameters:

part - Partition.

startVer - Start version.

endVer - End version.

Returns:

True if primary changed or required affinity version not found in history.

init

public void init(GridAffinityAssignmentCache aff)

Parameters:

aff - Affinity cache.

cachedVersions

public NavigableSet<AffinityTopologyVersion> cachedVersions()

Returns:

All initialized versions.