How to create custom Java annotations to record method parameters

I'm writing a Java EE application. I want to use and create custom annotations, which will record data when calling annotated methods What I want to do is that when I call an annotated method, the code iterates over all the passed method parameters and writes the standard output parameter keys and values

Some examples:

public class Test {

    @LogMethodData
    public int sum(int first,int second) {
        return first + second;
    }
}

I want to realize that when a custom method will be annotated with @ logmethoddata, the following code will pay attention to and record the passed method parameters to the standard output (if the parameters take precedence, it is similar to "method data: first – 4, second – 5"), including the value 4, and the parameter second includes the value 5), which is independent of the number of parameters passed by the method

If someone can help me, I will be very happy, because I have been looking for a solution, but I haven't found anything useful Finally, I'm not familiar with these things

Greetings, dahakka

Solution

You do not need to define your own annotation. You can use @ interceptors annotation in EE container as explained here

@Interceptors(LoggingInterceptor.class)

In the interceptor, you will get the context containing your parameters

public class LoggingInterceptor {
    ...

    @AroundInvoke
    public Object modifyGreeting(InvocationContext ctx) throws Exception {
        ....
        Object[] parameters = ctx.getParameters();
        try {
            return ctx.proceed();
        } catch (Exception e) {
            logger.warning("Error calling ctx.proceed in modifyGreeting()");
            return null;
        }
    }
}

Another example: here