Re: logLib - looking for feedback
Re: logLib - looking for feedback
- Subject: Re: logLib - looking for feedback
- From: email@hidden (Guillaume Iacino)
- Date: Fri, 13 Sep 2002 13:57:27 -0700
Hi,
This is a really cool widget that you built there. I am quite a newbie in
AppleScript and LogFile is exactly what I was looking for to incorporate
inside my script. Of course, I would have not been able to do it without
your script.
I do have aa question. Please excuse me if it is basic and more related to
AppleScript in general then your script.
*NewLog([file]) -- the file to write to; if no file exists, one will be
created.
Does it mean that if the file already exist, the file specified will be
opened the next time you use logMsg() or do I need to use reopenLog()?
In my tests if the file is already created: NewLog() fails.
What I am looking to do is to create the file first and if it already exist,
add some logs with clearing the previous one.
Thanks,
Guillaume
PS: I am running 10.2
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Hi all,
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For your pleasure, I've just posted a new toy to my site at:
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http://www.barple.pwp.blueyonder.co.uk/roughstuff/index.html#logLib
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LogLib creates custom objects for writing log files. It can be used both as
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a developer aid (it's more flexible and powerful than AS's built-in 'log'
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command) and to add log-writing facilities to finished scripts (more
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convenient than rolling your own). Documentation is included, as is a test
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script that'll give a good idea of what it can do.
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At this stage, I'm looking for comments/suggestions/feedback, etc,
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particularly on how easy or hard folk find it to use (i.e. it uses an OO
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design for flexibility; you don't need to know OO to use it, but if folk
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are fazed at the thought then tell my why and I'll work on making it easier
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to understand).
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I'm also wondering how granular to make it (at the moment, it creates just
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the one object type, but I could modify it to create 'basic', 'deluxe' and
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'super-deluxe' log objects), and whether to encourage users to subclass it
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or not (to add their own functions for logging messages with custom
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formatting, indenting, etc).
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So if anyone [and I do mean anyone - it's intended for easy use by anyone
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from novice to propellerhead] would like to take it for a spin and mail me
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on- or off-list with any thoughts, it'd be much appreciated.
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-------
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Now, for the more technically minded:
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One issue I've run into designing logLib is the lack of destructors in AS.
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Script objects already support a number of events (run, open, etc), but
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there's nothing at the point when an object is dereferenced/garbage
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collected [1]. This has implications for objects that need to 'clean up'
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after themselves.
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For example, creating a new log object in logLib opens a file for write
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access. Without a destructor event, there's no way to close that file
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automatically when the object is no longer used (e.g. when the script exits
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or errors), thus the user must remember to close those files themselves. If
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they forget, those files will remain open after the script has quit,
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causing problems if [e.g.] they wish to view them in SimpleText afterwards.
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To ameliorate this problem, I've added some extra stuff to logLib so that
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it'll keep its own references to log objects, and provided a 'clean up
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everything' function that the user can call right before the script exits,
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saving them the hassle of closing logs individually. It's a kludge, and by
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no means foolproof, but so far I haven't been able to come up with anything
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better [2].
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Again, if anyone has any thoughts, please do fire away.
>
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