/***********************************************************************************************************************
* Copyright (C) 2010-2013 by the Stratosphere project (http://stratosphere.eu)
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
* an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
* specific language governing permissions and limitations under the License.
**********************************************************************************************************************/
package eu.stratosphere.test.recordJobs.graph.pageRankUtil;
import eu.stratosphere.api.common.aggregators.Aggregator;
public class PageRankStatsAggregator implements Aggregator<PageRankStats> {
private double diff = 0;
private double rank = 0;
private double danglingRank = 0;
private long numDanglingVertices = 0;
private long numVertices = 0;
private long edges = 0;
@Override
public PageRankStats getAggregate() {
return new PageRankStats(diff, rank, danglingRank, numDanglingVertices, numVertices, edges);
}
public void aggregate(double diffDelta, double rankDelta, double danglingRankDelta, long danglingVerticesDelta,
long verticesDelta, long edgesDelta) {
diff += diffDelta;
rank += rankDelta;
danglingRank += danglingRankDelta;
numDanglingVertices += danglingVerticesDelta;
numVertices += verticesDelta;
edges += edgesDelta;
}
@Override
public void aggregate(PageRankStats pageRankStats) {
diff += pageRankStats.diff();
rank += pageRankStats.rank();
danglingRank += pageRankStats.danglingRank();
numDanglingVertices += pageRankStats.numDanglingVertices();
numVertices += pageRankStats.numVertices();
edges += pageRankStats.edges();
}
@Override
public void reset() {
diff = 0;
rank = 0;
danglingRank = 0;
numDanglingVertices = 0;
numVertices = 0;
edges = 0;
}
}