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Re: Developing Java Client?

From: Robert Simmons <derisor_at_arcor.de>
Date: 2003-10-22 01:57:43 CEST

OK OK ... you convinced me ... I wont do it. *surrenders* It was only an idea.

In fact the general hostile reactions I have been getting on this list to even
suggestions doesn't make me want to contribute at all..

Best of luck.

-- Kraythe

"Ben Collins-Sussman" <sussman@collab.net> wrote in message
> "Robert Simmons" <derisor@arcor.de> writes:
> > Yes but where is the design and architecture documentation? ;-) Im
> > not terribly confidently expecting it to exist but it would be
> > convenient. Reading code to figure out architecture is very slow and
> > tedious and most people simply wont bother. If it comes down to
> > having no hints other than the code base, I may not bother. I want
> > to write a library, not learn to write C all over again.
> Read the entire Subversion book, especially chapter 7. That explains
> a lot of architecture. There's also a very old, very general design
> document sitting here, which gives a good overview:
> http://subversion.tigris.org/servlets/ProjectDocumentList?folderID=259
> By the way, there is no "one protocol" for Subversion. The access to
> the repository is an abstract API, so anyone is free to write a custom
> protocol. At the moment, we have a stateful custom protocol which
> talks to an 'svnserve' server, and a WebDAV/DeltaV variant protocol
> that speaks to an Apache server. And and there's a 'no-network'
> protocol for accessing a repository directly. Which will you
> reimplement in pure Java? All of them?
> And then take a gander over at libsvn_wc design notes:
> http://svn.collab.net/repos/svn/trunk/subversion/libsvn_wc/README
> You wouldn't believe how difficult it is to manage a working copy that
> versions directories, and allows mixed-revisions. The number of bugs
> and edge-cases is staggering. People complain about what a 'mess'
> libsvn_wc is, and how it needs to be rewritten from scratch, but
> nobody has the guts to do it. The job the library is doing is
> incredibly complex, and nobody is 100% yet that a new library could be
> doing the same job significantly better.
> But really, you need to read the whole book and actually *use* the
> software to get a good grip on how difficult a problem this is.
> Writing a version control system is not something that's trivially
> tackled by a committee with "Good Object Oriented Principles". It's a
> Really Hard Problem. Ask the huge community here that's been working
> on it for three years. Ask Tom Lord & friends over on the arch
> project. Ask how many years Larry McVoy has spent on Bitkeeper.
> It it possible to write a client in pure java? Sure, absolutely. But
> only by someone who knows both the original problem and Subversion
> incredibly intimately. There's no magic blueprint we can hand you.

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Received on Wed Oct 22 02:01:14 2003

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