| 1 | /* |
| 2 | * Copyright 2006-2007 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.jms; |
| 18 | |
| 19 | import java.util.List; |
| 20 | |
| 21 | import org.apache.commons.logging.Log; |
| 22 | import org.apache.commons.logging.LogFactory; |
| 23 | import org.springframework.batch.item.ItemWriter; |
| 24 | import org.springframework.jms.core.JmsOperations; |
| 25 | import org.springframework.jms.core.JmsTemplate; |
| 26 | import org.springframework.util.Assert; |
| 27 | |
| 28 | /** |
| 29 | * An {@link ItemWriter} for JMS using a {@link JmsTemplate}. The template |
| 30 | * should have a default destination, which will be used to send items in |
| 31 | * {@link #write(List)}.<br/> |
| 32 | * <br/> |
| 33 | * |
| 34 | * The implementation is thread safe after its properties are set (normal |
| 35 | * singleton behavior). |
| 36 | * |
| 37 | * @author Dave Syer |
| 38 | * |
| 39 | */ |
| 40 | public class JmsItemWriter<T> implements ItemWriter<T> { |
| 41 | |
| 42 | protected Log logger = LogFactory.getLog(getClass()); |
| 43 | |
| 44 | private JmsOperations jmsTemplate; |
| 45 | |
| 46 | /** |
| 47 | * Setter for JMS template. |
| 48 | * |
| 49 | * @param jmsTemplate |
| 50 | * a {@link JmsOperations} instance |
| 51 | */ |
| 52 | public void setJmsTemplate(JmsOperations jmsTemplate) { |
| 53 | this.jmsTemplate = jmsTemplate; |
| 54 | if (jmsTemplate instanceof JmsTemplate) { |
| 55 | JmsTemplate template = (JmsTemplate) jmsTemplate; |
| 56 | Assert |
| 57 | .isTrue(template.getDefaultDestination() != null |
| 58 | || template.getDefaultDestinationName() != null, |
| 59 | "JmsTemplate must have a defaultDestination or defaultDestinationName!"); |
| 60 | } |
| 61 | } |
| 62 | |
| 63 | /** |
| 64 | * Send the items one-by-one to the default destination of the jms template. |
| 65 | * |
| 66 | * @see org.springframework.batch.item.ItemWriter#write(java.util.List) |
| 67 | */ |
| 68 | public void write(List<? extends T> items) throws Exception { |
| 69 | |
| 70 | if (logger.isDebugEnabled()) { |
| 71 | logger.debug("Writing to JMS with " + items.size() + " items."); |
| 72 | } |
| 73 | |
| 74 | for (T item : items) { |
| 75 | jmsTemplate.convertAndSend(item); |
| 76 | } |
| 77 | |
| 78 | } |
| 79 | |
| 80 | } |