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What is an Advice?
Advice is the implementation of an aspect. It is something like telling your
application of a new behavior. Generally, and advice is inserted into an
application at joinpoints.
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What is a Pointcut?
A pointcut is something that defines at what joinpoints an advice should be
applied. Advices can be applied at any joinpoint that is supported by the AOP
framework. These Pointcuts allow you to specify where the advice can be
applied.
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What is an Introduction in AOP?
An introduction allows the user to add new methods or attributes to an
existing class. This can then be introduced to an existing class without
having to change the structure of the class, but give them the new behavior
and state.
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What is a Target?
A target is the class that is being advised. The class can be a third party
class or your own class to which you want to add your own custom behavior. By
using the concepts of AOP, the target class is free to center on its major
concern, unaware to any advice that is being applied.
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What is a Proxy?
A proxy is an object that is created after applying advice to a target object.
When you think of client objects the target object and the proxy object are
the same.
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What is meant by Weaving?
The process of applying aspects to a target object to create a new proxy
object is called as Weaving. The aspects are woven into the target object at
the specified joinpoints.
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What are the different points where weaving can be applied?
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Compile Time
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Classload Time
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Runtime
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What are the different advice types in spring?
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Around : Intercepts the calls to the target method
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Before : This is called before the target method is invoked
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After : This is called after the target method is returned
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Throws : This is called when the target method throws and exception
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Around : org.aopalliance.intercept.MethodInterceptor
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Before : org.springframework.aop.BeforeAdvice
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After : org.springframework.aop.AfterReturningAdvice
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Throws : org.springframework.aop.ThrowsAdvice
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What are the different types of AutoProxying?
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What is the Exception class related to all the exceptions that are
thrown in spring applications?
DataAccessException - org.springframework.dao.DataAccessException
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