001/* 002 * Copyright 2006-2014 the original author or authors. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * https://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016 017package org.springframework.batch.sample.support; 018 019import java.util.List; 020 021import org.springframework.batch.item.ItemWriter; 022 023/** 024 * Simulates temporary output trouble - requires to retry 3 times to pass 025 * successfully. 026 * 027 * @author Robert Kasanicky 028 */ 029public class RetrySampleItemWriter<T> implements ItemWriter<T> { 030 031 private int counter = 0; 032 033 @Override 034 public void write(List<? extends T> items) throws Exception { 035 int current = counter; 036 counter += items.size(); 037 if (current < 3 && (counter >= 2 || counter >= 3)) { 038 throw new IllegalStateException("Temporary error"); 039 } 040 } 041 042 /** 043 * @return number of times {@link #write(List)} method was called. 044 */ 045 public int getCounter() { 046 return counter; 047 } 048 049}