spring-batch SimplePartitioner 源码
spring-batch SimplePartitioner 代码
文件路径：/spring-batch-core/src/main/java/org/springframework/batch/core/partition/support/SimplePartitioner.java
/*
* 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
*
* https://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.support;
import java.util.HashMap;
import java.util.Map;
import org.springframework.batch.item.ExecutionContext;
/**
* Simplest possible implementation of {@link Partitioner}. Just creates a set of empty
* {@link ExecutionContext} instances, and labels them as
* <code>{partition0, partition1, ..., partitionN}</code>, where <code>N</code> is the
* grid size.
*
* @author Dave Syer
* @since 2.0
*/
public class SimplePartitioner implements Partitioner {
private static final String PARTITION_KEY = "partition";
@Override
public Map<String, ExecutionContext> partition(int gridSize) {
Map<String, ExecutionContext> map = new HashMap<>(gridSize);
for (int i = 0; i < gridSize; i++) {
map.put(PARTITION_KEY + i, new ExecutionContext());
}
return map;
}
}
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