/*
* Copyright 2006-2013 the original author or authors.
*
* 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 org.springframework.batch.core.partition;
import java.util.Map;
import org.springframework.batch.core.partition.support.SimplePartitioner;
import org.springframework.batch.item.ExecutionContext;
/**
* @author Dave Syer
*
*/
public class MinMaxPartitioner extends SimplePartitioner {
@Override
public Map<String, ExecutionContext> partition(int gridSize) {
Map<String, ExecutionContext> partition = super.partition(gridSize);
int total = 8; // The number of items in the ExampleItemReader
int range = total/gridSize;
int i = 0;
for (ExecutionContext context : partition.values()) {
int min = (i++)*range;
int max = Math.min(total, i * range);
context.putInt("min", min);
context.putInt("max", max);
}
return partition;
}
}