> From: Peter Royal [mailto:[EMAIL PROTECTED]]
>
> On Tuesday 11 June 2002 07:22 am, Leo Sutic wrote:
> > Basically, the contract is:
> >
> > "Every pair of component C and its associated CManager interfaces
> > must define a method that, when called by the client, indicates
> > that the client is finished using the component C. The method
> > may be in the CManager interface - for example,
> > CManager.release (C c) - or in the C interface - for example,
> > C.close (). Note that this contract applies to component
> > *interfaces*.
> > even if the implementation does not require an end-of-transaction
> > signal from the client, the method must be specified so
> > implementations
> > that do require such a signal can recieve them."
> >
> > How about that?
>
> Yes, but not for all components. Only components that are
> "heavy / scarce" in
> some respect and need to be pooled. (JDBC Connection, Cocoon
> pipeline
> components..)
OK - I'm fine with that. If it is inherent in a component's interface
that it does not need to be released ever, then - no release() or
equivalent.
I just do not want to come across a situation where my implementation
of a component interface requires release() and the interface does
not have it. (Thus, the code using the component will never call it.)
For example:
public interface PetersComponent {
public final static String ROLE = "...";
public void doStuff ();
}
public class LeosImplementation implements PetersComponent {
public void doStuff () {
// ...
}
public void release () {
// Must be called, but how? PetersComponent does not specify it,
// so users of this interface never calls release() or any
equivalent.
}
}
But I'm fine with:
/**
* Proof that implementations of PetersComponentThatNeverNeedsRelease
* will never need a release() method
*
* ...
*
* Q.E.D.
*/
public interface PetersComponentThatNeverNeedsRelease {
public final static String ROLE = "...";
public void doStuff ();
}
public class LeosImplementation
implements PetersComponentThatNeverNeedsRelease {
public void doStuff () {
// ...
}
// No release() needed.
}
/LS
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