org.eobjects.analyzer.cluster.FixedChunkSizeJobDivisionManager Maven / Gradle / Ivy
/**
* AnalyzerBeans
* Copyright (C) 2014 Neopost - Customer Information Management
*
* This copyrighted material is made available to anyone wishing to use, modify,
* copy, or redistribute it subject to the terms and conditions of the GNU
* Lesser General Public License, as published by the Free Software Foundation.
*
* This program 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 distribution; if not, write to:
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301 USA
*/
package org.eobjects.analyzer.cluster;
import org.eobjects.analyzer.job.AnalysisJob;
/**
* A simple {@link JobDivisionManager} which builds divisions based on a
* preferred chunk size. If for instance there's a chunk size of 1000 records,
* and an incoming job has an expected row count of 30,000 records - then there
* will be 30 divisions made.
*/
public class FixedChunkSizeJobDivisionManager implements JobDivisionManager {
private final int _chunkSize;
public FixedChunkSizeJobDivisionManager(int chunkSize) {
if (chunkSize <= 0) {
throw new IllegalArgumentException("Chunk size must be a positive integer");
}
_chunkSize = chunkSize;
}
@Override
public int calculateDivisionCount(AnalysisJob masterJob, int expectedRows) {
final int chunkCount = (int) Math.ceil((1.0d * expectedRows / _chunkSize));
return chunkCount;
}
}