1. Spring 3.1 Features Worth Knowing About
(Available For Download Today)
Rossen Stoyanchev, Software Engineer
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© 2010 SpringSource, A division of VMware. All rights reserved

2. Agenda
 Environment
 Java Configuration DSL
 Cache Abstraction
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3. Moving an Application Across Environments
TRANSFER SERVICE DEV
ACCOUNT DAO
QA
DATA SOURCE
PROD
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4. Environment-Specific Properties In XML
Property Source:
dev/database.properties
Property Source: Java system property
dev/database.properties
qa/database.properties
java -DENV=prod ...
prod/database.properties
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5. Environment-Specific Properties In Java
Property Source:
Java system property?
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6. Spring EL Expressions in Spring 3.0
 Easier to see where properties originate from
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7. What About “Structural” Differences ?
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8. Environment-Specific Configuration in XML
prod/database-context.xml
dev/database-context.xml
Choose from multiple
app-context.xml files to accommodate
differences
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9. Environment-Specific Configuration in Java
Accommodate
differences in code
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10. Spring 3.1 “Environment” Abstraction
 A concrete representation with two key aspects
• Property Sources
• Bean Profiles
Property Source: Bean Profile:
A variety of sources: property A logical group of bean
files, system properties, definitions. Registered only if
servlet context, JNDI, etc. the profile is active.
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11. Managing Property Sources
 In standalone code
 In a Web application
• Implement ApplicationContextInitializer
• Register via contextInitializerClasses context parameter in web.xml
 Default property sources
• JVM properties
• System envrionment variables
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12. Accessing Environment Properties
 In standalone code
 Via @Autowired or EnvironmentAware interface
 In configuration (via placeholders)
 <context:property-placeholder/> also now falls back on
Environment property sources
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13. Beans Profiles With XML
 Assign all beans to profile
Multiple profiles can be listed
 Assign enclosed beans to a profile
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14. Bean Profiles In Java
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15. Bean Profile Activation
 In code
 In Web applications
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16. Agenda
 Environment
 Java Configuration DSL
 Cache Abstraction
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17. Custom XML Namespaces
 Custom XML namespaces have become very popular
• In Spring and in other frameworks
 Succinct and highly expressive
 Each namespace element can result in the registration of any
number of bean definitions
 Question:
How do get the same benefits in Java configuration?
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18. Feature Specifications
 Java configuration equivalent to an XML namespace
 Declared in @FeatureConfiguration classes
Beans declared elsewhere
can be autowired in.
 Results in same bean declarations as <tx:annotation-driven />
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19. FeatureSpecifications Are Designed For Ease of Use
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20. Agenda
 Environment
 Java Configuration DSL
 Cache Abstraction
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21. Spring 3.1 Cache Abstraction
 CacheManager and Cache abstractions
• org.springframework.cache
 Backend adapters for EhCache, GemFire, Coherence, etc.
 Cache namespace
• <cache:annotation-driven />
 CacheManager SPI
• EhCacheManager
• GemFireCacheManager
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22. Annotation-Based Caching
Cache name
Custom key
Cache condition
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23. Spring 3.1 M1 Blog Series:
----------------------------------
http://blog.springsource.com/2008/03/26/spring-java-
configuration-whats-new-in-m3/
https://github.com/cbeams/spring-3.1-profiles-xml
https://github.com/cbeams/spring-3.1-profiles-java
https://github.com/cbeams/spring-3.1-featurespec
https://github.com/rstoyanchev/spring-3.1-mvc-java-config
Review updated Spring Reference Documentation
Provide feedback via JIRA and Forums
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24. Thank You
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