Why Doesn\'t My AOP Aspect Trigger for Nested Method Calls in Spring?

Troubleshooting AOP Failure for Nested Method Calls in Spring

Within the ABC.java class, two methods are defined: method1() and method2(). The goal is to implement AOP for method2() calls.

One approach involves creating an AOPLogger.java class with a checkAccess() aspect method. In the configuration file, an advice bean is defined and an aspect is configured to invoke checkAccess() before method2() is called.

However, despite these configurations, the checkAccess() method is not invoked when method2() is executed.

Root Cause:

In Spring AOP, aspects are applied to a proxy object surrounding the bean. When a bean instance is obtained, it is not the actual class but a synthetic class implementing interfaces and adding functionality like AOP.

Resolution:

In the present scenario, method1() directly invokes method2(). The aspect is not triggered because the method is not invoked on the proxy object.

To resolve this issue, there are two options:

• Split method1() and method2() into separate beans. This allows the aspect to be applied to the proxy object surrounding method2().
• Use a non-Spring-oriented AOP framework that doesn't rely on proxy object mechanisms.

Explanation:

The Spring documentation under "Understanding AOP Proxies" elaborates on this behavior and provides workarounds. One workaround is to separate the methods into separate beans, as suggested above.

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