001/* 002 * Copyright 2006-2007 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.repeat; 018 019 020/** 021 * Callback interface for batch operations. Many simple processes will be able 022 * to use off-the-shelf implementations of this interface, enabling the 023 * application developer to concentrate on business logic. 024 * 025 * @see RepeatOperations 026 * 027 * @author Dave Syer 028 * 029 */ 030public interface RepeatCallback { 031 032 /** 033 * Implementations return true if they can continue processing - e.g. there 034 * is a data source that is not yet exhausted. Exceptions are not necessarily 035 * fatal - processing might continue depending on the Exception type and the 036 * implementation of the caller. 037 * 038 * @param context the current context passed in by the caller. 039 * @return an {@link RepeatStatus} which is continuable if there is (or may 040 * be) more data to process. 041 * @throws Exception if there is a problem with the processing. 042 */ 043 RepeatStatus doInIteration(RepeatContext context) throws Exception; 044}