I wonder if this interview was pre-Dynamic proxies. They have so much more
flexibility than this construct. They give you the pre, post, and a lot
more. You can even end up invoking a completely different method than the
one that was called. You can reuse the proxy "wrapper" class on any class.
Imagine subclassing *all* of your classes to get some simple timestamping
pre- and post- routines to execute. ugh.
jim
> -----Original Message-----
> From: A mailing list for Enterprise JavaBeans development
> [mailto:[EMAIL PROTECTED]]On Behalf Of Gene Chuang
> Sent: Wednesday, September 06, 2000 9:05 PM
> To: [EMAIL PROTECTED]
> Subject: Re: Interceptors in the EJB model
>
>
> Yes, you can implement method interceptors using Dynamic Proxies;
> however,
> you gotta use Dynamic Proxies for all your references!
>
> What Gosling was describing was something more on the lines of:
>
> Object.preMethodInvoke(Method aMethod, Object[] aArgs)
> Object.postMethodInvoke(Method aMethod, Object[] aArgs, Object aReturn)
>
> where method interception is built into all Java Objects! Of course the
> default implementation does nothing, you're extended class would have to
> override these methods... That would be cool!
>
> Gene Chuang
> Teach the world... Join Kiko!
> <http://www.kiko.com/profile/join.jsp?refcode=TAF-gchuang>
>
>
>
> -----Original Message-----
> From: A mailing list for Enterprise JavaBeans development
> [mailto:[EMAIL PROTECTED]]On Behalf Of James Cook
> Sent: Wednesday, September 06, 2000 5:46 PM
> To: [EMAIL PROTECTED]
> Subject: Re: Interceptors in the EJB model
>
>
> It's already there in JDK 1.3 in the form of Dynamic Proxies.
>
> jim
>
> > -----Original Message-----
> > From: A mailing list for Enterprise JavaBeans development
> > [mailto:[EMAIL PROTECTED]]On Behalf Of Gene Chuang
> > Sent: Wednesday, September 06, 2000 6:38 PM
> > To: [EMAIL PROTECTED]
> > Subject: Re: Interceptors in the EJB model
> >
> >
> > I was reading some interview with James Gosling (java creator) somewhere
> > where he was saying in the proposed draft for JDK 2.0, method
> > pre-and-post-interceptors were gonna be implemented for native
> > Java... but
> > I don't think this idea got anywhere; too bad!
> >
> > Gene
> >
> > -----Original Message-----
> > From: A mailing list for Enterprise JavaBeans development
> > [mailto:[EMAIL PROTECTED]]On Behalf Of Tony Abbott
> > Sent: Wednesday, September 06, 2000 3:03 PM
> > To: [EMAIL PROTECTED]
> > Subject: Re: Interceptors in the EJB model
> >
> >
> > Method interceptors are listed as one of the features that have been
> > "deferred
> > to future releases" in the EJB 2.0 public draft.
> >
> > -t
> >
> >
> >
> >
> > On Tue, Sep 05, 2000 at 10:41:44AM -0700, Gene Chuang wrote:
> > > Hi,
> > >
> > > Are you asking for the following hooks in the Bean class?
> > >
> > > void ejbPreCall(Method aMethod, Object[] aArgs);
> > > void ejbPostCall(Method aMethod, Object[] aArgs, Object aReturn);
> > >
> > > Yeah, it'll be cool if they existed in the specs... EJB 3.0, maybe?
> > >
> > > Gene Chuang
> > > Teach the world... Join Kiko!
> > > <http://www.kiko.com/profile/join.jsp?refcode=TAF-gchuang>
> > >
> > >
> > >
> > > -----Original Message-----
> > > From: A mailing list for Enterprise JavaBeans development
> > > [mailto:[EMAIL PROTECTED]]On Behalf Of Pedro Garcia Lopez
> > > Sent: Tuesday, September 05, 2000 10:29 AM
> > > To: [EMAIL PROTECTED]
> > > Subject: Interceptors in the EJB model
> > >
> > >
> > > Hi all,
> > >
> > > Is it possible to create interceptors for EJB components ?
> > >
> > > For example, I have a class called Bank with a method
> withdraw(), and I
> > > want to trigger an event (using JMS) each time the method is
> called. The
> > > interceptor should trigger the event and the Bank code remains intact.
> > >
> > > With CORBA you can create interceptors without problem.
> > > In RMI you can modify stubs and mimic this interceptor concept (see
> > > Javaworld thismonth).
> > >
> > > Is it possible with the EJB model ?
> > > I imagine that this must be supported by some App container
> but must be
> > > vendor-specific and non-standard.
> > >
> > > Any idea ?
> > >
> > >
> > ==================================================================
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> > > of the message "signoff EJB-INTEREST". For general help,
> send email to
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> > >
> > >
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> > >
> >
> > --
> >
> > Tony Abbott [EMAIL PROTECTED]
> >
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> >
> >
>
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