1 /*
2 * Copyright 2012 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
17 package org.springframework.batch.item.amqp;
18
19 import org.apache.commons.logging.Log;
20 import org.apache.commons.logging.LogFactory;
21 import org.springframework.amqp.core.AmqpTemplate;
22 import org.springframework.batch.item.ItemWriter;
23 import org.springframework.util.Assert;
24
25 import java.util.List;
26
27 /**
28 * <p>
29 * AMQP {@link ItemWriter} implementation using an {@link AmqpTemplate} to
30 * send messages. Messages will be sent to the nameless exchange if not specified
31 * on the provided {@link AmqpTemplate}.
32 * </p>
33 *
34 * @author Chris Schaefer
35 */
36 public class AmqpItemWriter<T> implements ItemWriter<T> {
37 private final AmqpTemplate amqpTemplate;
38 private final Log log = LogFactory.getLog(getClass());
39
40 public AmqpItemWriter(final AmqpTemplate amqpTemplate) {
41 Assert.notNull(amqpTemplate, "AmpqTemplate must not be null");
42
43 this.amqpTemplate = amqpTemplate;
44 }
45
46 @Override
47 public void write(final List<? extends T> items) throws Exception {
48 if (log.isDebugEnabled()) {
49 log.debug("Writing to AMQP with " + items.size() + " items.");
50 }
51
52 for (T item : items) {
53 amqpTemplate.convertAndSend(item);
54 }
55 }
56 }