org.apache.giraph.function

Class ObjectHolder<T>

java.lang.Object

org.apache.giraph.function.ObjectHolder<T>

Type Parameters:

T - Type of object to hold.

All Implemented Interfaces:

Serializable, Consumer<T>, Supplier<T>

public class ObjectHolder<T>
extends Object
implements Supplier<T>, Consumer<T>

Default object holder, intermediary between producers and consumers. Holds value in memory, so can be used only when producer and consumer are in the same context. Useful when value is set on the master, and later read in block logic (RepeatUntilBlock), or in a different Piece, either on worker or master. If it is read within the same piece - just use local field.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
ObjectHolder() Constructor
ObjectHolder(T value) Constructor

Method Summary

Modifier and Type	Method and Description
void	apply(T value) Applies this function to input
T	get() Retrieves an instance of the appropriate type.
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

ObjectHolder

public ObjectHolder(T value)

Constructor

Parameters:

value - initial value

ObjectHolder

public ObjectHolder()

Constructor

Method Detail

get

public T get()

Description copied from interface: Supplier

Retrieves an instance of the appropriate type. The returned object may or may not be a new instance, depending on the implementation.

Specified by:

get in interface Supplier<T>

Returns:

result

apply

public void apply(T value)

Description copied from interface: Consumer

Applies this function to input

Specified by:

apply in interface Consumer<T>

Parameters:

value - Input

toString

public String toString()

Overrides:

toString in class Object