Thanks for your explanation, Berin!
I understand the difference, but - as I'm not a java expert - does
not know, what makes a component SingleThreaded. Which circumstances
must occur to declare a component so?
One of the components I wanted to make singlethreaded is the JaxpParser
in Cocoon2 (and that's actually the reason why I ask this question).
I don't see any specific code in that class.
Carsten
> Berin Loritsch wrote:
>
> Carsten Ziegeler wrote:
> >
> > Hi,
> >
> > I just wanted to make a SingleThreaded component poolable. Is this
> > not allowed?
>
> They are not allowed. Currently SingleThreaded marks interfaces that
> cannot be reused, and must be used in one thread at a time. Therefore,
> they are manufactured by the Factory method.
>
> Poolable components (inherently only run in one thread at a time) can
> be reused, therefore when one thread is done with it, it is returned
> to the pool.
>
> Notice the distinction.
>
> > I get an exception from the excalibur component manager, which does
> > the following test:
> > >>>
> > if (SingleThreaded.class.isAssignableFrom(componentClass))
> > {
> > numInterfaces++;
> > }
> >
> > if (ThreadSafe.class.isAssignableFrom(componentClass))
> > {
> > numInterfaces++;
> > }
> >
> > if (Poolable.class.isAssignableFrom(componentClass))
> > {
> > numInterfaces++;
> > }
> > <<<
> > This means these interfaces can not combined. I agree that
> > SingleThreaded and ThreadSafe are not possible and
> > ThreadSafe and Poolable don't make sense, but
> > Poolable and SingleThreaded seems ok to me.
> > Or am I wrong?
> >
> > Carsten
> >
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