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Hi,

One thing that would be wonderful is if I could add an annotation say

@logthis
public void doSomething() {
int i=0;
i=10;
}

which inserted code into the beginning and end of the method such as

public void doSomething() {
startLogging("doSomething");
int i=0;
i=10;
stopLoggin("doSomething";
}

Do annotations come close to providing that?

thanks

On Nov 29, 7:09 pm, "Timasmith" <timasm...@hotmail.com> wrote:
> Hi,
>
> One thing that would be wonderful is if I could add an annotation say
>
> @logthis
> public void doSomething() {
> int i=0;
> i=10;
>
> }which inserted code into the beginning and end of the method such as
>
> public void doSomething() {
> startLogging("doSomething");
> int i=0;
> i=10;
> stopLoggin("doSomething";
>
> }Do annotations come close to providing that?
>
> thanks

No

Timasmith wrote:
> Hi,
>
> One thing that would be wonderful is if I could add an annotation say
>
> @logthis
> public void doSomething() {
> int i=0;
> i=10;
> }
>
> which inserted code into the beginning and end of the method such as
>
> public void doSomething() {
> startLogging("doSomething");
> int i=0;
> i=10;
> stopLoggin("doSomething";
> }
>
> Do annotations come close to providing that?

No, but AOP does.

On Wed, 29 Nov 2006 19:09:35 -0000, Timasmith <>
wrote:

> Hi,
>
> One thing that would be wonderful is if I could add an annotation say
>
> @logthis
> public void doSomething() {
> int i=0;
> i=10;
> }
>
> which inserted code into the beginning and end of the method such as
>
> public void doSomething() {
> startLogging("doSomething");
> int i=0;
> i=10;
> stopLoggin("doSomething";
> }
>
> Do annotations come close to providing that?

You might want to look into Aspect Oriented Programming (AOP).

Dan.

--
Daniel Dyer
http://www.uncommons.org

> Do annotations come close to providing that?
Yes. You must be an apt expert to do that.

hiwa wrote:
>> Do annotations come close to providing that?
> Yes. You must be an apt expert to do that.

APT can be used to generate new code. It does not alter existing code.

I'm sure there are plenty of AOP-style tools that will help, either
modifying the byte code of the .class files, modifying classes in a
custom class loader or using instrumentation APIs on loading the code.

Tom Hawtin

Thomas Hawtin wrote:
> hiwa wrote:
> >> Do annotations come close to providing that?
> > Yes. You must be an apt expert to do that.
>
> APT can be used to generate new code. It does not alter existing code.
>
> I'm sure there are plenty of AOP-style tools that will help, either
> modifying the byte code of the .class files, modifying classes in a
> custom class loader or using instrumentation APIs on loading the code.
>
> Tom Hawtin


Ok, I guess ideally the annotation would drive the AOP- tool, I'll look
into that.

Timasmith wrote:
> Thomas Hawtin wrote:
> > hiwa wrote:
> > >> Do annotations come close to providing that?
> > > Yes. You must be an apt expert to do that.
> >
> > APT can be used to generate new code. It does not alter existing code.
> >
> > I'm sure there are plenty of AOP-style tools that will help, either
> > modifying the byte code of the .class files, modifying classes in a
> > custom class loader or using instrumentation APIs on loading the code.
> >
> > Tom Hawtin
>
>
> Ok, I guess ideally the annotation would drive the AOP- tool, I'll look
> into that.
Some 'experts' on Java annotation are talking about ....
http://forum.java.sun.com/thread.jsp...rt=0&tstart=20
http://forum.java.sun.com/thread.jsp...227834#4227834

On 29.11.2006 20:09, Timasmith wrote:
> Hi,
>
> One thing that would be wonderful is if I could add an annotation say
>
> @logthis
> public void doSomething() {
> int i=0;
> i=10;
> }
>
> which inserted code into the beginning and end of the method such as
>
> public void doSomething() {
> startLogging("doSomething");
> int i=0;
> i=10;
> stopLoggin("doSomething";
> }
>
> Do annotations come close to providing that?

Others have answered that already. However, if you just want to trace
execution then there are plenty tools out there. These work either on
VM level or inside (limpy log or so).

robert