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This article shows you what the role of DefaultAopProxyFactory in SpringFramework is, the content is concise and easy to understand, it can definitely brighten your eyes. I hope you can get something through the detailed introduction of this article.

For DefaultAopProxyFactory in Springaop, the previous picture is shown in figure 1 below.

Figure 1

DefaultAopProxyFactory is used in Springaop to create a proxy, which determines when to use the JDK or Cglib proxy, as shown in the following List-1:

List-1

Public class DefaultAopProxyFactory implements AopProxyFactory, Serializable {@ Override public AopProxy createAopProxy (AdvisedSupport config) throws AopConfigException {if (config.isOptimize () | | config.isProxyTargetClass () | | hasNoUserSuppliedProxyInterfaces (config)) {Class targetClass = config.getTargetClass () If (targetClass = = null) {throw new AopConfigException ("TargetSource cannot determine target class:" + "Either an interface or a target is required for proxy creation.") } if (targetClass.isInterface () | | Proxy.isProxyClass (targetClass)) {return new JdkDynamicAopProxy (config);} return new ObjenesisCglibAopProxy (config) } else {return new JdkDynamicAopProxy (config);} / * Determine whether the supplied {@ link AdvisedSupport} has only the * {@ link org.springframework.aop.SpringProxy} interface specified * (or no proxy interfaces specified at all). * / private boolean hasNoUserSuppliedProxyInterfaces (AdvisedSupport config) {Class [] ifcs = config.getProxiedInterfaces (); return (ifcs.length = = 0 | (ifcs.length = = 1 & & SpringProxy.class.isAssignableFrom (IFCs [0]));}}

In List-1, if the target object has an interface implementation and proxyTargetClass=true is not set, the JDK proxy is used. In addition, if the target object is an interface or proxy class, use JDK proxy, otherwise use Cglib. Some people say that if ProxyTargetClass=true is set up, JDK proxy will be used, which is normally correct, but not necessarily from the point of view of the source code-- even if ProxyTargetClass=true is set, if the target object class is an interface or proxy class. The JDK proxy is used.

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