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}