1, the configuration ProxyFactoryBean
Creating a Spring AOP Spring IOC container method.
(1) Configuration of the ProxyFactoryBean Advisor notifier
Notification implements section defines the behavior of the target object is enhanced, namely Advice notice.
(2) class definitions ProxyFactoryBean
AOP is set to achieve an important attribute, such as proxyInterface, interceptorNames, target and so on.
interceptorNames: to be defined notifier notifier at proxyFactoryBean configuration, interceptor acts by proxy object.
(3) The target property defined
By target injection bean, is the need for enhanced object AOP cut through.
2, ProxyFactoryBean objects generated AOPproxy
Specific implementation needs through dynamic proxy feature.
AOPproxy object generation process:
(1) In the FactoryBean getObject () is the start entry, call inITIallizeAdvisorChain () method getObject method.
(2) by the method initializes inITIallizeAdvisorChain advisor chain, a flag during initialization, it is determined whether the initialization. If not been initialized, the initialization is completed after obtaining the ProxyFactoryBean proxy object, reading the configuration notifier after initialization, get notifications by getbean (name) method.
3, JDK generate a proxy object AopProxy
(1) AopProxy JdkDynamicAopProxy interface implemented method call JDK Proxy class generating a proxy object in the method.
(2) before generating the proxy object, the proxy interface configuration needs to obtain from the proxy object advised object, and then calls the methods of the Proxy class newProxyInstace Proxy agent to obtain the corresponding object.
When generating a proxy object, the need to clarify three parameters: Object Class loader, proxy interface, where the Proxy callback method.
Proxy callback object methods where the need to achieve InvocationHandler interface, the interface defines invoke method, providing a callback entrance proxy object.
