001/*
002 * Copyright 2002-2017 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.jms.config;
018
019import javax.jms.MessageListener;
020
021import org.springframework.jms.listener.MessageListenerContainer;
022import org.springframework.lang.Nullable;
023import org.springframework.util.Assert;
024
025/**
026 * A {@link JmsListenerEndpoint} simply providing the {@link MessageListener} to
027 * invoke to process an incoming message for this endpoint.
028 *
029 * @author Stephane Nicoll
030 * @since 4.1
031 */
032public class SimpleJmsListenerEndpoint extends AbstractJmsListenerEndpoint {
033
034        @Nullable
035        private MessageListener messageListener;
036
037
038        /**
039         * Set the {@link MessageListener} to invoke when a message matching
040         * the endpoint is received.
041         */
042        public void setMessageListener(@Nullable MessageListener messageListener) {
043                this.messageListener = messageListener;
044        }
045
046        /**
047         * Return the {@link MessageListener} to invoke when a message matching
048         * the endpoint is received.
049         */
050        @Nullable
051        public MessageListener getMessageListener() {
052                return this.messageListener;
053        }
054
055
056        @Override
057        protected MessageListener createMessageListener(MessageListenerContainer container) {
058                MessageListener listener = getMessageListener();
059                Assert.state(listener != null, "No MessageListener set");
060                return listener;
061        }
062
063        @Override
064        protected StringBuilder getEndpointDescription() {
065                return super.getEndpointDescription()
066                                .append(" | messageListener='").append(this.messageListener).append("'");
067        }
068
069}