Introducing Spring Framework

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Chapter 18 ■ Spring and Groovy //Equivalent to: It is necessary to add a defined namespace, and if a bean uses some attributes, then the name must be after the class definition, followed by a colon and the value; if the attribute contains a hyphen, it must be enclosed between single quotes. The namespace must be first on the line of the beans, separated by a space and the URL between double quotes and after a colon. xmlns name:"URL" beanId ( class, attribute : value [, attibute : value, 'attribute-xy': value ]) Example: beans { } xmlns rabbit:"http://www.springframework.org/schema/rabbit" rabbit.'connection-factory'(id:"rabbitConnectionFactory", host:"localhost") //Equivalent to: As you can see, you can simplify your bean definitions by using the Spring DSL and you can remove all the verbosity from the XML. Of course, you can still use the XML together with this new Spring DSL. Imagine that you have a library already that contains an XML configuration and you want it to be part of the Spring DSL. How can you include it? Very easily; just use the importBeans and that’s it. See Listing 18-8. 261
Chapter 18 ■ Spring and Groovy Listing 18-8. Spring DSL and XML Configurations: sampleBeans.groovy beans { } importBeans('classpath:/mydocuments-context.xml') //More beans //More beans Listing 18-7 shows how to use existing XML configurations in the new Spring DSL. Summary In this chapter, you saw how the Spring Framework interacts regardless of the main programming language, Java or Groovy. You can use the new Spring DSL, which offers a more readable syntax and is easy to use. You can get rid of all of the XML verbosity and use a more dynamic way to define your beans. You saw how to import more beans scripts, either using Groovy or via XML with the importBeans keyword. You learned the basic syntax of the Spring DSL and how to define any bean by translating the XML to the new Spring DSL. In the next chapter, you will create a new Spring project, Spring Boot. Spring Boot simplifies enterprise development by using Java or Groovy to create micro-services. 262
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THE EXPERT’S VOICE ® IN SPRING
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Contents at a Glance About the Auth
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Introduction This book is an introd
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Part I Spring Framework Basics The
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Chapter 1 ■ Your First Spring App
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Chapter 2 ■ Working with Classes
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Chapter 3 Applying Different Config
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Chapter 3 ■ Applying Different Co
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Spring Stereotypes Chapter 3 ■ Ap
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Chapter 4 ■ Using Beans Scopes pu
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Chapter 4 ■ Using Beans Scopes Th
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Chapter 4 ■ Using Beans Scopes @A
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Chapter 4 ■ Using Beans Scopes do
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Chapter 5 ■ Working with Collecti
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Chapter 6 ■ Using Resource Files
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Chapter 7 Testing Your Spring Appli
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Chapter 7 ■ Testing Your Spring A
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Chapter 8 Give Advice to Your Sprin
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Chapter 8 ■ Give Advice to Your S
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Chapter 9 ■ Adding Persistence to
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Chapter 10 ■ Showing Your Spring
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Chapter 11 ■ Integrating Your Spr
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Chapter 12 Exposing a REST API Nowa
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Chapter 12 ■ Exposing a REST API
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HTTP-DELETE Chapter 12 ■ Exposing
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Chapter 13 Adding E-mail and Schedu
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Chapter 13 ■ Adding E-mail and Sc
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Part III Spring Framework Advanced
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Chapter 14 ■ Using Dynamic Langua
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Chapter 15 ■ Spring Data Within Y
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Chapter 15 ■ Spring Data Within Y
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Stop ActiveMQ Appendix A ■ Instal
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Installing RabbitMQ on Windows Appe
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Appendix A ■ Installing Tools Fig
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Installing Spring XD on Windows App
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■ index • I I/O operations, 62
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■ index Spring application (cont.
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Introducing Spring Framework A Prim
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To my parents, Rocio Cruz and Felip
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■ Contents ■■Chapter 3: Apply
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■ Contents ■■Chapter 12: Expo
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■ Contents ■■Chapter 20: Your
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About the Author Felipe Gutierrez i
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Acknowledgments I would like to exp
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