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* Copyright 2011 Red Hat Inc. and/or its affiliates and other
* contributors as indicated by the @author tags. All rights reserved.
* See the copyright.txt in the distribution for a full listing of
* individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.infinispan.distexec.mapreduce;
import java.util.Map;
/**
* Collator collates results from Reducers executed on Infinispan cluster and assembles a final
* result returned to an invoker of MapReduceTask.
*
*
* @see MapReduceTask#execute(Collator)
* @see MapReduceTask#executeAsynchronously(Collator)
* @see Reducer
*
* @author Manik Surtani
* @author Vladimir Blagojevic
*
* @since 5.0
*/
public interface Collator<KOut, VOut, R> {
/**
* Collates all reduced results and returns R to invoker of distributed task.
*
* @return final result of distributed task computation
*/
R collate(Map<KOut, VOut> reducedResults);
}