1 /*
2 * Copyright 2006-2008 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 package org.springframework.batch.core;
17
18 import org.springframework.batch.item.ItemReader;
19 import org.springframework.batch.item.ItemWriter;
20
21 /**
22 * Listener interface around the reading of an item.
23 *
24 * @author Lucas Ward
25 *
26 */
27 public interface ItemReadListener<T> extends StepListener {
28
29 /**
30 * Called before {@link ItemReader#read()}
31 */
32 void beforeRead();
33
34 /**
35 * Called after {@link ItemReader#read()}
36 *
37 * @param item returned from read()
38 */
39 void afterRead(T item);
40
41 /**
42 * Called if an error occurs while trying to read.
43 *
44 * @param ex thrown from {@link ItemWriter}
45 */
46 void onReadError(Exception ex);
47 }