/*
* Copyright 2002-2014 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.jms.config;
import java.lang.reflect.Method;
import java.util.Arrays;
import org.springframework.core.annotation.AnnotationUtils;
import org.springframework.jms.listener.MessageListenerContainer;
import org.springframework.jms.listener.adapter.MessagingMessageListenerAdapter;
import org.springframework.jms.support.converter.MessageConverter;
import org.springframework.messaging.handler.annotation.SendTo;
import org.springframework.messaging.handler.annotation.support.MessageHandlerMethodFactory;
import org.springframework.messaging.handler.invocation.InvocableHandlerMethod;
import org.springframework.util.Assert;
import org.springframework.util.StringUtils;
/**
* A {@link JmsListenerEndpoint} providing the method to invoke to process
* an incoming message for this endpoint.
*
* @author Stephane Nicoll
* @since 4.1
*/
public class MethodJmsListenerEndpoint extends AbstractJmsListenerEndpoint {
private Object bean;
private Method method;
private MessageHandlerMethodFactory messageHandlerMethodFactory;
/**
* Set the object instance that should manage this endpoint.
*/
public void setBean(Object bean) {
this.bean = bean;
}
public Object getBean() {
return this.bean;
}
/**
* Set the method to invoke to process a message managed by this endpoint.
*/
public void setMethod(Method method) {
this.method = method;
}
public Method getMethod() {
return this.method;
}
/**
* Set the {@link MessageHandlerMethodFactory} to use to build the
* {@link InvocableHandlerMethod} responsible to manage the invocation
* of this endpoint.
*/
public void setMessageHandlerMethodFactory(MessageHandlerMethodFactory messageHandlerMethodFactory) {
this.messageHandlerMethodFactory = messageHandlerMethodFactory;
}
@Override
protected MessagingMessageListenerAdapter createMessageListener(MessageListenerContainer container) {
Assert.state(this.messageHandlerMethodFactory != null,
"Could not create message listener - MessageHandlerMethodFactory not set");
MessagingMessageListenerAdapter messageListener = createMessageListenerInstance();
InvocableHandlerMethod invocableHandlerMethod =
this.messageHandlerMethodFactory.createInvocableHandlerMethod(getBean(), getMethod());
messageListener.setHandlerMethod(invocableHandlerMethod);
String responseDestination = getDefaultResponseDestination();
if (StringUtils.hasText(responseDestination)) {
if (container.isPubSubDomain()) {
messageListener.setDefaultResponseTopicName(responseDestination);
}
else {
messageListener.setDefaultResponseQueueName(responseDestination);
}
}
MessageConverter messageConverter = container.getMessageConverter();
if (messageConverter != null) {
messageListener.setMessageConverter(messageConverter);
}
return messageListener;
}
/**
* Create an empty {@link MessagingMessageListenerAdapter} instance.
*/
protected MessagingMessageListenerAdapter createMessageListenerInstance() {
return new MessagingMessageListenerAdapter();
}
private String getDefaultResponseDestination() {
SendTo ann = AnnotationUtils.getAnnotation(getMethod(), SendTo.class);
if (ann != null) {
Object[] destinations = ann.value();
if (destinations.length != 1) {
throw new IllegalStateException("Invalid @" + SendTo.class.getSimpleName() + " annotation on '"
+ getMethod() + "' one destination must be set (got " + Arrays.toString(destinations) + ")");
}
return (String) destinations[0];
}
return null;
}
@Override
protected StringBuilder getEndpointDescription() {
return super.getEndpointDescription()
.append(" | bean='").append(this.bean).append("'")
.append(" | method='").append(this.method).append("'");
}
}