The REST with Spring series

Bootstrapping a web application with Spring 3.1 and Java based Configuration, part 1 | baeldung
Others:

• Part 2 – Building a RESTful Web Service with Spring 3.1 and Java based Configuration
• Part 3 – Securing a RESTful Web Service with Spring Security 3.1
• Part 4 – RESTful Web Service Discoverability
• Part 5 – REST Service Discoverability with Spring

Spring 3.1.0.BUILD-SNAPSHOT

• The Spring framework snapshot repository is included so that Maven will be able to access the latest Spring snapshots – 3.1.0.BUILD-SNAPSHOT. 
• http://maven.springframework.org/snapshot
• I’m using the snapshots for this post because some really useful stuff has been added since 3.1.0.M2, especially in the area of Java based configuration for MVC. 
• For the purposes of this post however, 3.1.0.M2 works fine, as none of the new additions are in use for the bootstrapping part. 
• In order to use this version, the snapshot repository should be replaced with:
• http://maven.springframework.org/milestone

CGLIB

• Why CGLIB is a dependency?
• The entire configuration cannot function without it.
• If removed, Spring will throw:
• java.lang.IllegalStateException:
• CGLIB is required to process @Configuration classes.
• Either add CGLIB to the classpath or remove the following @Configuration bean definitions
• @Configuration
• Effective
• Configuration classes should not be final
• They should have a constructor with no arguments
• 4. The IoC container, 4.12 - Java-based container configuration
• @ImportResource
• Is used to import the existing XML based Spring configuration.
• This may be configuration which is still being migrated from XML to Java
• Or simply legacy configuration that you wish to keep.
• Either way, importing into the Container is essential for a successful migration, allowing small steps without too much risk.
• Equivalent XML annotation:
• <import resource="classpath*:/rest_config.xml"/>