This post is excellent .You have explained point cuts and wildcards so sweetly and nicely that it's just genius. Excellent, excellent tutorial. Thank you.
As you can see, the syntax is: public String getName. Now, we want to do this all getters by using a wildcard. So it becomes: * * get*() you see? The * replaces every keyword. In this case this means: "run this advice before any get method of any Type in any scope".
May be the advice is called only for the instances of the classes that we have created. The getBean() method is of ApplicationContext class and we have not written that class, it's provided by Spring.
at this point I question the need for pointcut expressions, why not use final private String? If there is a point for them explained in future it will make more sense, but still...
You did ask the question 7 years ago, but still to answer your question. You pass in the method declaration. public * get*() -> any public method with any return type starting with the name get and ARGS - NONE. The getBean signatute is -> getBean("beanName", Class). it is not the same signature
Aspects are applied by the spring container for beans managed by it. But who will manage and apply it for the container itself. May Be that's why above code doesn't run.
Just make sure you have the exact dependencies, that is asm-3.3.1 cglib-2.2.2 aspectjrt-1.6.11 aspectweaver-1.6.11. I had the same problem because I had a different version of aspect*.jar
Why do I have to use @Pointcut while I can use this way: final String test = " execution(* get*()) "; @Before( test ) public void a1 ( ) { }; @Before( test ) public void a2 ( ) { }; ????
Say if we want to call the advice for 2 methods from different classes, can't we write another @Before annotation (for method2) just below the earlier @Before annotation (for method1) and then the method definition follows... is that possible?
Hi i understand if i use get*(*) it will match all getters with one argument and get*(..) for zero or more arguments. But what if i want to match getters having 2 arguments only? I tried get*(* *) it throws an error. Can you please advice the right way of doing it.
hi,kaushik good work. last few minutes of the video, you mentioned about defining pointcut, but you mentioned that we are aplying pointcut. i think we should apply advice to a pointcut. its not about applying pointcut?
Every time I try to use pointcut, the spring tells me error happened when creating triangle, which the detail says it can't find referenced pointcut for whatever name I gave for the pointcut... Does anyone know why?
as for multiple methods can not you just annotate the allgetters() and include all the methods that need to be called with in the body of the allgetters() @Before public void allGetters(){ logingAdvice(); secondAdvice(); }
Your answer is here: stackoverflow(.)com/questions/10482563/aop-java-lang-illegalargumentexception-error-at-0-cant-find-referenced-poi I quote the answer: I believe you need to put another wildcard in front of: @Pointcut("execution(* get*())") change it to: @Pointcut("execution(* *get*())")
This post is excellent .You have explained point cuts and wildcards so sweetly and nicely that it's just genius. Excellent, excellent tutorial. Thank you.
Great work. Few people have this skill in teaching.
Keep it up. God Bless !
Way to go Koushik! Excellent tutorials!
Awesome Explanation !! waiting for your spring security tutorial.
Very nice tutorial God Bless you for such a nice work.your way of teaching is great sir
good question, i did a little search, answer is: The application context is not a Spring component (it is the container that manages other components)
As you can see, the syntax is: public String getName. Now, we want to do this all getters by using a wildcard. So it becomes: * * get*() you see? The * replaces every keyword. In this case this means: "run this advice before any get method of any Type in any scope".
can't we create a string variable for the expression and use it instead of creating pointcut method?
lol had the same doubt!
May be the advice is called only for the instances of the classes that we have created. The getBean() method is of ApplicationContext class and we have not written that class, it's provided by Spring.
It's very good tutorial. I would say thank you.
very clearly explained!
Awesome tutorial...
It does not need to have the capital letter. It can be any (legal) method name, as long as it has the @Before annotation before the method signature.
How come the dummy method has void return type while the actual point cut can return other stuff too?
why does he select with mouse and right click and copy and right click and paste ?
So that people watching can follow. I usually prefer GUI / menus to keyboard shortcuts when recording tutorials
@@Java.Brains makes sense. Thanks for the reply !
at this point I question the need for pointcut expressions, why not use final private String?
If there is a point for them explained in future it will make more sense, but still...
I think it's just for having more clear code, you won't have consts that you shouldn't use in code.
When you add @Pointcut("execution(* *get*(..))") why doesn't it run the ctx.getBean()? This also matches the wildcard.
@Pointcut("execution(** getName(..))")
public void allGetters()
{}
//its working
You did ask the question 7 years ago, but still to answer your question. You pass in the method declaration. public * get*() -> any public method with any return type starting with the name get and ARGS - NONE. The getBean signatute is -> getBean("beanName", Class). it is not the same signature
Plus the context is still not up and running to handle the aspects.
Aspects are applied by the spring container for beans managed by it.
But who will manage and apply it for the container itself.
May Be that's why above code doesn't run.
Good work. thanks.
Very good!
Just make sure you have the exact dependencies, that is
asm-3.3.1
cglib-2.2.2
aspectjrt-1.6.11
aspectweaver-1.6.11.
I had the same problem because I had a different version of aspect*.jar
I have all the latest Jars and I am still getting the error pointcut not found
Great job bro..This is realy helpful..keep it up..:)
what is the sequence of running of LoggingAdvice and SeconAdvice, because for me SecondAdvice method is running first for the same code
why the advice did not run while calling ctx.getBean() method. it is also a get*() type.
Why do I have to use @Pointcut while I can use this way:
final String test = " execution(* get*()) ";
@Before( test )
public void a1 ( ) { };
@Before( test )
public void a2 ( ) { };
????
Say if we want to call the advice for 2 methods from different classes, can't we write another @Before annotation (for method2) just below the earlier @Before annotation (for method1) and then the method definition follows... is that possible?
Hi i understand if i use get*(*) it will match all getters with one argument and get*(..) for zero or more arguments. But what if i want to match getters having 2 arguments only? I tried get*(* *) it throws an error. Can you please advice the right way of doing it.
Sorry there was a syntax error i tried get*(*,*) it worked fine for me. Thank you for an amazing tutorial.
How to execute advice of same pointcut in a fixed order?
am not to invoke AOp over private method inside circle class.Any help
hi,kaushik good work. last few minutes of the video, you mentioned about defining pointcut, but you mentioned that we are aplying pointcut. i think we should apply advice to a pointcut. its not about applying pointcut?
Every time I try to use pointcut, the spring tells me error happened when creating triangle, which the detail says it can't find referenced pointcut for whatever name I gave for the pointcut... Does anyone know why?
I got the same problem and tried all positions for *, however for me I was missing following dependency in my project
aspectjweaver-1.9.0
as for multiple methods can not you just annotate the allgetters() and include all the methods that need to be called with in the body of the allgetters()
@Before
public void allGetters(){
logingAdvice();
secondAdvice();
}
Hi kaushik do videos on Devops Concepts as well. Thanks.
thanks
pls upload the nxt video soon
I don't see it.
Thats not the reason for that error. Check out my reply to Lanaizen.
Generally getters don't take argument. So example is not correct. Although concept and explanation is correct.
Videos are too slow, would be good to cover up in 2 videos max instead of 4-5 videos
set the playback speed to 1.5. much better
@@cugoman True. Thanks.
Your answer is here: stackoverflow(.)com/questions/10482563/aop-java-lang-illegalargumentexception-error-at-0-cant-find-referenced-poi I quote the answer: I believe you need to put another wildcard in front of:
@Pointcut("execution(* get*())")
change it to:
@Pointcut("execution(* *get*())")
first 2 minutes of the video and last 2 mins of the previous video .. you are repeating the same thing again and again.