Introducing Spring Framework

Chapter 18 ■ Spring and Groovy
Listing 18-4 shows the xmlns mongo namespace and its equivalent from the XML tag converted into
the DSL and how to use it to create your beans. Another cool feature of the Groovy programming language and the
Spring DSL is that you can import classes and give them an alias, like the MongoTemplate class with alias MT. This way
you can avoid putting in the whole class.
Next, let’s see the OXM that you used in Chapter 16 to convert from XML to object and vice versa. See Listing 18-5
for the mydocumentsOXM.groovy file.
Listing 18-5. mydocumentsOXM.groovy
import org.springframework.amqp.support.converter.MarshallingMessageConverter as MMC
import org.springframework.oxm.xstream.XStreamMarshaller as XM
import com.apress.isf.java.model.Document
beans{
}
messageConverter(MMC,ref("xstreamMarshaller"))
xstreamMarshaller(XM){
aliases = [document:Document]
mode = 1001
}
Listing 18-5 shows the OXM with the XStream Marshaller and the use of an alias for the imports. Also, it shows
the import and alias feature that helps you avoid putting too much code in the definitions. Next, let’s see Listing 18-6
for the RabbitMQ bean definitions.
Listing 18-6. mydocumentsRabbitMQ.groovy
import org.springframework.amqp.rabbit.listener.adapter.MessageListenerAdapter as MLA
beans{
xmlns rabbit:"http://www.springframework.org/schema/rabbit"
importBeans("classpath:META-INF/groovy/mydocumentsOXM.groovy")
rabbit.'connection-factory'(id:"rabbitConnectionFactory", host:"localhost")
rabbit.admin('connection-factory':'rabbitConnectionFactory')
rabbit.template(id:"rabbitTemplate",
'connection-factory':"rabbitConnectionFactory",
'message-converter':"messageConverter")
rabbit.'direct-exchange'(name:"mydocuments"){
rabbit.bindings{
rabbit.binding(key:".pdf", queue:"docs-pdf")
rabbit.binding(key:".txt", queue:"docs-txt")
rabbit.binding(key:".url", queue:"docs-web")
}
}
256