> From: Berin Loritsch [mailto:[EMAIL PROTECTED]]
>
> > From: Leo Sutic [mailto:[EMAIL PROTECTED]]
> >
> > > From: Berin Loritsch [mailto:[EMAIL PROTECTED]]
> > >
> > > Hmm. What we have here is a bad design. Should the
> > > container make up for your poor design? Can you really get
> > > away with only three instances in a pool with a web
> > > environment? Honestly, there is nothing in Cocoon that does
> > > what you are talking about.
> >
> > Yes, it is bad design. It is more than that - it is horrible design.
> >
> > But admit one thing: It was not difficult to see that it was
> > utterly atrocious!
> >
> > I meant to use it to show a situation that may occur in a
> > system. It will not be as clearly awful as the abomination I
> > showed you, but *hidden* in the code. I can show you more
> > poor architecture:
> >
> > public void tailRecursive (int i) {
> > if (i < 100) {
> > mycomp = lookup (...);
> > tailRecursive (i + 1);
> > }
> > }
>
> In order for a component based system to gain all benefits of being
> component based, we have to consider the "story" of the system. After
> all, that is where we develop our roles. From the story that we are
> trying to tell.
>
> The point is that you should know ahead of time, what the correct
> story is. You should know how, in a certain context the components
> relate to each other. That is what design is all about. As much as
> possible, you should strive to make your components as threadsafe
> as possible. That way you just don't have to worry about certain
> things.
>
> Systemic problems such as your recursive and iterative lookups should
> not be allowed by design.
What's wrong with this:
public void do () {
for (int I = 0; i < 8000; i++) {
mycomp = lookup (...);
info = mycomp.getIt(i);
release(mycomp);
info = calculate(info);
print(info);
}
}
Assumptions: mycomp.getIt() might use JDBC connection which are limited
in count, and calculate() takes some time, so it is really not wise to
block connection for time of the whole loop.
Vadim
</snip>
---------------------------------------------------------------------
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, email: [EMAIL PROTECTED]
