| 1 | /* |
| 2 | * Copyright 2006-2007 the original author or authors. |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package org.springframework.batch.core.partition.support; |
| 18 | |
| 19 | import java.util.HashMap; |
| 20 | import java.util.Map; |
| 21 | |
| 22 | import org.springframework.batch.item.ExecutionContext; |
| 23 | |
| 24 | /** |
| 25 | * Simplest possible implementation of {@link Partitioner}. Just creates a set |
| 26 | * of empty {@link ExecutionContext} instances, and labels them as |
| 27 | * <code>{partition0, partition1, ..., partitionN}</code>, where <code>N</code> is the grid |
| 28 | * size. |
| 29 | * |
| 30 | * @author Dave Syer |
| 31 | * @since 2.0 |
| 32 | */ |
| 33 | public class SimplePartitioner implements Partitioner { |
| 34 | |
| 35 | private static final String PARTITION_KEY = "partition"; |
| 36 | |
| 37 | public Map<String, ExecutionContext> partition(int gridSize) { |
| 38 | Map<String, ExecutionContext> map = new HashMap<String, ExecutionContext>(gridSize); |
| 39 | for (int i = 0; i < gridSize; i++) { |
| 40 | map.put(PARTITION_KEY + i, new ExecutionContext()); |
| 41 | } |
| 42 | return map; |
| 43 | } |
| 44 | |
| 45 | } |