Springframework learning part 3 About AOP Pointcut.
As mentioned in the previous summary, I will summarize Pointcut once again.
A Pointcut is a group of Join Points.
For example, the following execution is also a Join Point Pointcut.
execution(* com.nanafushi.sample.*Controller.*(..))
Pointcut allows you to specify a pattern for matching.
execution(* com.nanafushi.sample.*Controller.*(..))
Taking the above as an example, if we extract and explain in order from the left,
| parts | role |
|---|---|
| execution | Directive. Trigger method execution |
| * | Return value. Only those in void |
| com.nanafushi.sample | package |
| *Controller | name of the class. Class with Controller at the end |
| * | Method name |
| (..) | Method argument. Arbitrary argument in this case |
The wildcards that can be used with Pointcut are as follows.
| Wildcard | role |
|---|---|
| * | The principle is an arbitrary character string Any one level for packages Any one argument for the method |
| .. | For packages, any zero or greater package Any zero or more arguments for method arguments |
| + | By specifying after the class name, all subclasses and implementation classes including that class are included. |
There are various types of Pointcut. I will list the ones that I think I will use often.
| Pointcut | Trigger |
|---|---|
| execution | For methods that match the pattern |
| within | For methods of classes that match the pattern |
| bean | Targets bean methods that match the pattern |
that's all. good job.
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