Introducing Spring Framework

Chapter 16 ■ Messaging with Your Spring Application
Listing 16-10 shows all the necessary information (like the location of the RabbitMQ server; the name of queues
and their bindings with the exchange; the message converter and the consumers) that RabbitMQ needs in order to
start sending, converting, and receiving messages. This configuration can be done using the RabbitMQ web console
or it can be done programmatically, offering more control depending on certain business rules, but here you are going
to use the Spring XML configuration, the declarative way. If you want to see how you can do all of this configuration
programmatically, you can take a look at the RabbitMQ reference at http://docs.spring.io/spring-amqp/docs/
latest-ga/reference/html/.
This configuration (see Listing 16-10) has several sections; let’s take a look at each one of them. Remember that
you are using the namespace.
The tag will create a caching connection to the RabbitMQ broker and you can pass
some extra information like username, password, host, vhost, and port.
The tag will create all the necessary exchanges, bindings, and queues, and it is necessary to
pass the ID of the connection (rabbitConnectionFactory).
The tag is an implementation of the Template pattern, and this will help to send and convert
messages to the RabbitMQ broker. You need to specify what connection you are going to use to pass the ID of the
connection-factory (rabbitConnectionFactory) and the converter that you are going to use (messageConverter); in
this case, it’s the Marshaller defined in Listing 16-9.
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