org.apache.ignite.internal.util.lang

Class GridNodePredicate

java.lang.Object

org.apache.ignite.internal.util.lang.GridNodePredicate

All Implemented Interfaces:

Serializable, Iterable<UUID>, IgnitePredicate<ClusterNode>

public class GridNodePredicate
extends Object
implements IgnitePredicate<ClusterNode>, Iterable<UUID>

Convenient node predicate as a separate class. It allows to avoid "dragging" enclosing class's state when predicates are created as anonymous classes in stateful enclosing context. This class is also optimized for evaluation of large number of nodes.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
GridNodePredicate(ClusterNode... nodes) Creates node predicate that evaluates to true for all provided nodes.
GridNodePredicate(Collection<UUID> ids) Creates node predicate that evaluates to true for all provided node IDs.
GridNodePredicate(Set<UUID> ids) Creates node predicate that evaluates to true for all provided node IDs.
GridNodePredicate(UUID... ids) Creates node predicate that evaluates to true for all provided node IDs.

Method Summary

Methods

Modifier and Type	Method and Description
boolean	apply(ClusterNode n) Predicate body.
boolean	equals(Object o)
int	hashCode()
Iterator<UUID>	iterator()
Set<UUID>	nodeIds() Gets set of node IDs this predicate is based on.
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

GridNodePredicate

public GridNodePredicate(Set<UUID> ids)

Creates node predicate that evaluates to true for all provided node IDs. Implementation will not make a defensive copy.

Parameters:

ids - Optional node IDs. If none provided - predicate will always return false.

GridNodePredicate

public GridNodePredicate(@Nullable
                 Collection<UUID> ids)

Creates node predicate that evaluates to true for all provided node IDs. Implementation will make a defensive copy.

Parameters:

ids - Optional node IDs. If none provided - predicate will always return false.

GridNodePredicate

public GridNodePredicate(@Nullable
                 UUID... ids)

Creates node predicate that evaluates to true for all provided node IDs. Implementation will make a defensive copy.

Parameters:

ids - Optional node IDs. If none provided - predicate will always return false.

GridNodePredicate

public GridNodePredicate(@Nullable
                 ClusterNode... nodes)

Creates node predicate that evaluates to true for all provided nodes. Implementation will make a defensive copy.

Parameters:

nodes - Optional grid nodes. If none provided - predicate will always return false.

Method Detail

nodeIds

public Set<UUID> nodeIds()

Gets set of node IDs this predicate is based on. Note that for performance reasons this methods return the internal set that should not be modified by the caller.

Returns:

Set of node IDs this predicate is based on.

iterator

public Iterator<UUID> iterator()

Specified by:

iterator in interface Iterable<UUID>

apply

public boolean apply(ClusterNode n)

Predicate body.

Specified by:

apply in interface IgnitePredicate<ClusterNode>

Parameters:

n - Predicate parameter.

Returns:

Return value.

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object o)

Overrides:

equals in class Object

toString

public String toString()

Overrides:

toString in class Object