Re: Delegation vs Hooks (was: Annouce: DBIx::Class, a.k.a "taking the easy way out")

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From: John Siracusa
Subject: Re: Delegation vs Hooks (was: Annouce: DBIx::Class, a.k.a "taking the easy way out")
Date: 00:39 on 27 Jul 2005

On 7/26/05 7:27 PM, Ask Bj=F8rn Hansen wrote:
> What's the difference between hooks and delegation?
>=20
> Is it just the direction the relationship starts in (hooks =3D plugin
> says "Application, I want to handle foo", delegation =3D application
> says "plugin, you handle foo")?

With any language issue, there's ambiguity based on context.  That said, I'=
d
differentiate those terms thusly:

Hooks: "When event X happens, call code Y"

Delegation: "When it comes time to do X, let Y handle it."

The distinction is that, in the "hook" case, responsibility is not entirely
delegated (see? :) to another entity.  Rather, the other entity is simply
given a chance to contribute to the process.  Delegation, OTOH, entirely
passes responsibility for a certain task to another entity.

As this post suggests:

On 7/26/05 8:07 PM, Matt S Trout wrote:
> hooks generally mean an interface to register a sub and delegation genera=
lly
> means an interface to register a class/object.

in the Perl world, code references tend to be used with "hooks", while
objects or classes tend to be used with delegation.  But IMO that's not the
important distinction between the two.  Rather, it's merely a side-effect o=
f
what does differentiate them: delegates have more responsibility, and so
most delegates are "big" (objects/classes); things connected to hooks
(hookees? :) merely "contribute," and so "small" things (code refs) often
suffice.

-John=20

(message missing)

Annouce: DBIx::Class, a.k.a "taking the easy way out"
Matt S Trout 05:26 on 25 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
John Siracusa 15:32 on 25 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Tony Bowden 15:40 on 25 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Michael G Schwern 21:54 on 25 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Tony Bowden 21:59 on 25 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Matt S Trout 22:44 on 25 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Michael G Schwern 22:00 on 25 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Matt S Trout 22:52 on 25 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Sebastian Riedel 16:42 on 25 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Tyler Rorabaugh 17:09 on 25 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Sebastian Riedel 17:24 on 25 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Tony Bowden 18:11 on 25 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Tony Bowden 18:14 on 25 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Matt S Trout 21:08 on 25 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Matt S Trout 21:03 on 25 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Tony Bowden 21:05 on 25 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Matt S Trout 20:55 on 25 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Tony Bowden 21:08 on 25 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Michael G Schwern 22:03 on 25 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Tony Bowden 22:11 on 25 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Perrin Harkins 21:21 on 25 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Matt S Trout 21:48 on 25 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Matt S Trout 20:37 on 25 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
John Siracusa 22:02 on 25 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Michael G Schwern 22:12 on 25 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
John Siracusa 01:15 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Sebastian Riedel 07:53 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
John Siracusa 12:37 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Sebastian Riedel 20:47 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Adrian Howard 21:03 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Michael G Schwern 22:01 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Perrin Harkins 22:05 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Michael G Schwern 22:21 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Matt S Trout 23:02 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Sebastian Riedel 22:35 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Matt S Trout 17:15 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Michael G Schwern 18:05 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Michael G Schwern 22:54 on 25 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
John Siracusa 15:14 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Perrin Harkins 15:16 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Sebastian Riedel 18:31 on 25 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Tony Bowden 19:08 on 25 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Sebastian Riedel 18:36 on 25 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Tony Bowden 22:23 on 25 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Michael G Schwern 22:53 on 25 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Matt S Trout 23:55 on 25 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Michael G Schwern 00:26 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Brad Bowman 00:49 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Perrin Harkins 01:31 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Sam Vilain 04:21 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
William Ross 09:44 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Matt S Trout 16:59 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Perrin Harkins 17:07 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Matt S Trout 17:47 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Michael G Schwern 18:15 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Matt S Trout 18:58 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Perrin Harkins 19:25 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Michael G Schwern 22:20 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Tony Bowden 22:39 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Matt S Trout 23:13 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Tony Bowden 23:14 on 26 Jul 2005

Delegation vs Hooks (was: Annouce: DBIx::Class, a.k.a "taking the easy way out")
=?ISO-8859-1?Q?Ask_Bj=F8rn_Hansen?= 23:27 on 26 Jul 2005

Re: Delegation vs Hooks (was: Annouce: DBIx::Class, a.k.a "taking the easy way out")
John Siracusa 00:39 on 27 Jul 2005

Re: Delegation vs Hooks (was: Annouce: DBIx::Class, a.k.a "taking the easy way out")
Matt S Trout 00:54 on 27 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Matt S Trout 23:57 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Matt S Trout 23:15 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
John Siracusa 02:07 on 27 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Matt S Trout 03:32 on 27 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
John Siracusa 03:34 on 27 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Matt S Trout 13:44 on 27 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Michael G Schwern 16:57 on 27 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Christopher Hicks 18:04 on 27 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Michael G Schwern 19:38 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Sebastian Riedel 20:50 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Tony Bowden 22:00 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Sebastian Riedel 22:32 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Tony Bowden 22:39 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Sebastian Riedel 22:49 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Michael G Schwern 22:03 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Sebastian Riedel 22:35 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
John Siracusa 02:08 on 27 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Matt S Trout 23:10 on 25 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Tony Bowden 07:27 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Michael G Schwern 06:48 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Perrin Harkins 14:56 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Tony Bowden 19:08 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Aaron Trevena 08:57 on 27 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Cees Hek 23:29 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Matt S Trout 00:02 on 27 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Sebastian Riedel 01:41 on 27 Jul 2005

Re: Delegation vs Hooks (was: Annouce: DBIx::Class, a.k.a "taking the easy way out")
Matt S Trout 00:07 on 27 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Adrian Howard 14:41 on 27 Jul 2005