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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.sample.support;
18  
19  import java.util.List;
20  
21  import org.springframework.batch.item.ItemWriter;
22  
23  /**
24   * Simulates temporary output trouble - requires to retry 3 times to pass
25   * successfully.
26   * 
27   * @author Robert Kasanicky
28   */
29  public class RetrySampleItemWriter<T> implements ItemWriter<T> {
30  
31  	private int counter = 0;
32  
33  	public void write(List<? extends T> items) throws Exception {
34  		int current = counter;
35  		counter += items.size();
36  		if (current < 3 && (counter >= 2 || counter >= 3)) {
37  			throw new RuntimeException("Temporary error");
38  		}
39  	}
40  
41  	/**
42  	 * @return number of times {@link #write(List)} method was called.
43  	 */
44  	public int getCounter() {
45  		return counter;
46  	}
47  
48  }