This document summarizes new features in Spring 3.1, including the environment abstraction, Java configuration DSL, and cache abstraction. It describes how the environment abstraction manages property sources and bean profiles. The Java configuration DSL allows specifying features in Java similar to XML namespaces. The cache abstraction introduces the CacheManager and Cache interfaces along with annotations for caching methods.

1. Spring 3.1 Features Worth Knowing About
(Available For Download Today)
Rossen Stoyanchev, Software Engineer
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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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