Re: [Bobs-devel] db3/db4 configuration

[Rene R. <re...@gr...>]

On Tue, 2004-03-16 at 04:36, Joe Zacky wrote:
> I have a plan to make bobs support both db3 and db4 in php. I'd like to 
> run it by anyone who cares to comment.
> 
> 1) During the ./configure phase (./configure also runs during rpm 
> install) see whether db3 or db4 is supported. Set a variable in 
> inc/config.php: $sys_conf["dbhandler"] would be either "db3" or "db4".
> 
> 2) add a function get_db_handler() to class_config.php.
> 
> 3) include class_config.php in any files that use dba_open() and use a 
> variable loaded from get_db_handler() for the third parameter (db 
> handler) in dba_open().
> 
> A php upgrade from db3 to db4 would require re-installing bobs or just 
> changing db3 to db4 in config.php.
> 
> Any comments are welcome.
> 
> Joe Zacky
> 

I'm not too happy about this solution. It will come back to bite us. I
would really prefer a runtime php solution.
Something like:
	if php >= 4.3.0 
		use dba_handlers() to determine available handlers
	else
		try to open a db4 database.
		$db = dba_open("/tmp/randname", "c", "db4")
		if it returns FALSE try a db3 database and check the return value.
		whichever return something other than false gets the job. This would
also be easier to expand to db5 or the likes in the future.

The reason I'm not happy about the ./configure solution is that some 
users _will_ upgrade their systems at some point, and they will most
likely not reinstall bobs and we will have tell them what to do every
time. I see no point in pushing a solution that will lead to problems
for the users and more support questions for us.
Having this check run every time a backup is run or a user accesses the
system (log in and creates a session) is not a problem since the
additional server load is minimal. 

I hope you are on top again. Being sick is no fun :(

Cheers
Rene