org.apache.ignite.internal.util.lang.gridfunc

Class LongSumReducer

java.lang.Object

org.apache.ignite.internal.util.lang.gridfunc.LongSumReducer

All Implemented Interfaces:

Serializable, IgniteReducer<Long,Long>

public class LongSumReducer
extends Object
implements IgniteReducer<Long,Long>

Reducer that calculates sum of long integer elements.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
LongSumReducer()

Method Summary

Methods

Modifier and Type	Method and Description
boolean	collect(Long e) Collects given value.
Long	reduce() Reduces collected values into one.
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

LongSumReducer

public LongSumReducer()

Method Detail

collect

public boolean collect(Long e)

Collects given value. If this method returns false then IgniteReducer.reduce() will be called right away. Otherwise caller will continue collecting until all values are processed.

Specified by:

collect in interface IgniteReducer<Long,Long>

Parameters:

e - Value to collect.

Returns:

true to continue collecting, false to instruct caller to stop collecting and call IgniteReducer.reduce() method.

reduce

public Long reduce()

Reduces collected values into one.

Specified by:

reduce in interface IgniteReducer<Long,Long>

Returns:

Reduced value.

toString

public String toString()

Overrides:

toString in class Object