How to lock an IO::All::MLDBM object

DrWhy has asked for the wisdom of the Perl Monks concerning the following question:

I have a project that uses IO::All's interface to MLDBM to manage databases of complex perl structures. To this point I have been been guaranteed that only one process will be writing to the db at any one time, so I didn't worry about locking the database during updates. Now, however, I need to add some new features that will break this guarantee, so I need to think about locking.

Does anyone know a good way to do locking on an IO::All::MLDBM object? the ->lock() method doesn't seem to work. It doesn't produce an error, but then any attempt to use the locked object causes one. My assumption then is that locking isn't supported directly by IO::All::MLDBM objects. But maybe I'm just not doing something right?

--DrWhy

"If God had meant for us to think for ourselves he would have given us brains. Oh, wait..."

Comment on How to lock an IO::All::MLDBM object

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Re: How to lock an IO::All::MLDBM object by clwolfe (Scribe) on Jun 28, 2006 at 05:06 UTC
Well, from the possibly-useless-suggestion department, have a look at MLDBM::Sync. Granted, it's not behind IO::All's madcap fanciness, but you could have look at how it does it. And then write IO::All::MLDBM::Sync :-) Or if nothing else, you could make a small test case using MLDBM::Sync directly, leaving out IO::All, and confirm that your problem is within IO::All::MLDBM. But you were probably already thinking that. Good luck!	[reply]

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Re: How to lock an IO::All::MLDBM object
by clwolfe (Scribe) on Jun 28, 2006 at 05:06 UTC

Well, from the possibly-useless-suggestion department, have a look at MLDBM::Sync. Granted, it's not behind IO::All's madcap fanciness, but you could have look at how it does it. And then write IO::All::MLDBM::Sync :-)

Or if nothing else, you could make a small test case using MLDBM::Sync directly, leaving out IO::All, and confirm that your problem is within IO::All::MLDBM. But you were probably already thinking that.

[reply]