Introducing Spring Framework

Chapter 11 ■ Integrating Your Spring Application with External Systems
@Component("rabbitmqProducer")
public class RabbitMQProducer {
@Autowired
private RabbitTemplate rabbitTemplate;
}
public void send(Document document){
MessageProperties messageProperties = new MessageProperties();
messageProperties.setContentType("text/xml");
byte[] body = XmlUtils.toXML(document).getBytes();
Message message = new Message(body, messageProperties);
rabbitTemplate.send(message);
}
Listing 11-10 shows the producer; here you are using the org.springframework.amqp.rabbit.core.
RabbitTemplate class (provided by the Spring Rabbit module) that allows you to send messages through the AMQP
to the RabbitMQ broker. Also, you are creating an instance of the org.springframework.amqp.core.Message class,
a Message class that takes two parameters. The first parameter is the body of the message; in this case the Document
object is converted into an array of bytes by using the XmlUtil class (see Listing 11-3). The second parameter will be
a MessageProperties instance that only indicates that the message will be in XML. Then you send the message by
calling the rabbitTemplate.send method.
Listing 11-11 shows the XML configuration and the use of the namespace to declare some of
the elements needed to connect to the RabbitMQ broker. This is necessary for the Spring container to know about the
RabbitMQ broker.
Listing 11-11. mydocuments-context.xml