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.item; 018 019import java.util.List; 020 021/** 022 * <p> 023 * Basic interface for generic output operations. Class implementing this 024 * interface will be responsible for serializing objects as necessary. 025 * Generally, it is responsibility of implementing class to decide which 026 * technology to use for mapping and how it should be configured. 027 * </p> 028 * 029 * <p> 030 * The write method is responsible for making sure that any internal buffers are 031 * flushed. If a transaction is active it will also usually be necessary to 032 * discard the output on a subsequent rollback. The resource to which the writer 033 * is sending data should normally be able to handle this itself. 034 * </p> 035 * 036 * @author Dave Syer 037 * @author Lucas Ward 038 */ 039public interface ItemWriter<T> { 040 041 /** 042 * Process the supplied data element. Will not be called with any null items 043 * in normal operation. 044 * 045 * @param items items to be written 046 * @throws Exception if there are errors. The framework will catch the 047 * exception and convert or rethrow it as appropriate. 048 */ 049 void write(List<? extends T> items) throws Exception; 050 051}