org.openspaces.core.executor.support
Class SumReducer<T extends Number,R extends Number>

java.lang.Object
  org.openspaces.core.executor.support.SumReducer<T,R>

All Implemented Interfaces:

AsyncResultsReducer<T,R>

Direct Known Subclasses:

AvgReducer

public class SumReducer<T extends Number,R extends Number>
extends Object
implements AsyncResultsReducer<T,R>

A default implementation of a reducer that sums all types T into a result R.

Author:

kimchy

Field Summary

protected NumberHelper<R>

redeuceHelper

Constructor Summary

SumReducer(Class<R> reduceType)

Method Summary

SumReducer	ignoreExceptions() Causes the reducer to ignore exceptions and just sum the results that succeeded.
R	reduce(List<AsyncResult<T>> results)

Methods inherited from class java.lang.Object

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

Field Detail

redeuceHelper

protected final NumberHelper<R extends Number> redeuceHelper

Constructor Detail

SumReducer

public SumReducer(Class<R> reduceType)
           throws IllegalArgumentException

Throws:

IllegalArgumentException

Method Detail

ignoreExceptions

public SumReducer ignoreExceptions()

Causes the reducer to ignore exceptions and just sum the results that succeeded.

reduce

public R reduce(List<AsyncResult<T>> results)
                        throws Exception

Specified by:

reduce in interface AsyncResultsReducer<T extends Number,R extends Number>

Throws:

Exception