Java AOP in Spring 2.0 Rob Harrop, Interface21 Ltd.

39 Pages·2006·1.01 MB·English

Java
AOP in Spring 2.0
Rob Harrop, Interface21 Ltd.
Agenda
• What's new in Spring 2.0
• Simplifying transaction configuration
• @AspectJ Aspects
• Writing pointcuts with AspectJ
• Using AspectJ aspects
• Aspects and JMX
About the Speaker
• VP at Interface21
• Core Developer on Spring
• Founder of Spring Modules
• JMX 2.0 Expert Group Member
• Author of Pro Spring
• Contact me at [email protected]
What's new in Spring 2.0
• @AspectJ Aspects
– Same syntax as AspectJ aspects
– Use @AspectJ annotations
and
– Use the same aspect in Spring AJ
– @AspectJ aspects are normal Spring beans
• Inject dependencies into them
• Configure them
• Expose them to JMX or remote clients
What's new in Spring 2.0
• Spring provides a model for true POJO
Aspects
– No annotations!
What's new in Spring 2.0
• Simplified transaction configuration
– TX-specific configuration tags
• Define TX semantics with full code completion
• Apply transactions using AJ pointcuts
– Greatly simplified annotation-driven
transactions
• A single XML tag to enable!
What's new in Spring 2.0
• Integrated AspectJ pointcut language
– Single model for both Spring and AJ aspects
– Reuse/share pointcuts in both environments
– Greatly simplify Spring XML configuration
• Paired with Spring 2.0 XML
Simplifying transaction
configuration
• Option 1: XML only
– Define TX advice using the <tx:advice/>
– Apply advice using <aop:advisor/>
Simplifying transaction
configuration
• <tx:advice id="txAdvice">
• <tx:attributes>
• <tx:method name="*"
• propagation="REQUIRED"
• read-only="false"/>
• </tx:attributes>
• </tx:advice>
• <aop:config>
• <aop:advisor advice-ref="txAdvice"
• pointcut="execution(*
myapp.MyClass.*(..))"/>
• </aop:config>
Simplifying transaction
configuration
• Option 2: Using annotations
– Add @Transactional to classes
– Enable using <tx:annotation-
driven/>