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Re: WebObjects 4.5.1 & Tiger?
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Re: WebObjects 4.5.1 & Tiger?


  • Subject: Re: WebObjects 4.5.1 & Tiger?
  • From: Patrick Middleton <email@hidden>
  • Date: Wed, 11 Jan 2006 16:00:25 +0000


On 11 Jan 2006, at 14:50, Dana Kashubeck wrote:

Okay, I know there probably isn't anyone out there still using WebObjects 4.5, but I thought it was worth a shot.

We've been keeping our users on Jaguar, so I've been using Jag to do my WebObjects development (yes, still with Objective-C). However, we're about ready to deploy Tiger to our users and I was hoping to move with them. I can't use a dual-boot system because it is just not efficient. My choices are either stay on Jag or find some way to make WO work on Tiger. I can stick with Jag, but more and more of the applications that I need/would like to use are Panther or Tiger only.

I was wondering if anyone else has been in this situation and has any suggestions. Right now porting to Java and the current version of WO or to something else is not an option. Our apps are built on hundreds of thousands of lines of code in Objective-C frameworks and there is only little ol' me for WebObject development. (We're a very small company!) I'm stuck with WebObjects 4.5.1 for the foreseeable future, even though porting would be the best thing, so please don't suggest that. Thanks in advance for any help!!


There is a Known Hack for getting WO451 Developer working on Jaguar -- see also http://www.wodeveloper.com/omniLists/webobjects-talk/2005/ June/msg00028.html "WO451 on Jaguar/Panther/Tiger [was: Re: Side effect of OSX on Intel announcement]".

My experience is that this works well even in deployment -- for pure ObjC woapps only. No Java (if you want the Java version of WebObjects, you know where to find it), and no WebScript either. The lack of WebScript means that out-of-the-box you can't use Monitor or wotaskd either, and you have to very careful about using WOExtensions.

There's source provided for WOExtensions. It's possible re-implement all the .wos scripted classes as ObjC.

...

It's then possible to do the same thing with Monitor.woa and wotaskd.woa! I wrote shell scripts to detect .wos files inside useful woapps and woframeworks, generate stub ObjC classes with as much code completed as possible, and tar/gzip the .wos files in place. I found 'nm', 'otool' and 'class-dump' very useful while doing this. I then built a compatibilty framework for each useful woapp or woframework, and I now inject these at runtime using the - WOLoadFrameworks default.

Other stuff? I decided I needed to make all collections mutable (the compatibility API for this disappeared in 10.2; by WO451...Update4 it should no longer be necessary), and I managed to fake this via implementing +initialize and +allocWithZone: in categories on each of these classes; if the receiver is a class object for mutable instances, we return [super allocWithZone:zone], otherwise we return the return value from [MutableEquivalent allocWithZone:zone].

The Monitor private framework implements a class MSiteConfig and an instance method - (BOOL)saveLocalArchive was printing out lots of messages "Failed to save local site config. Is %@ writeable ?" referring to /Library/WebObjects/Configuration/SiteConfig.conf . The implementation appears to use -[NSDictionary writeToFile:atomically:] and this was always returning NO. I devised a plausible equivalent category implementation using -[NSString writeToFile:atomically:] on the return value from -[NSDictionary description].

...

You will need to edit the shell script that is the WebObjects 4.5.1 startup item.

All the above was a fair bit of work -- but I have a bunch of apps, including wotaskd and Monitor, apparently happily deployed on 10.4.3.


Hope this helps!

-- Patrick

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