[fpc-devel] Rather large flaw in TJSONConfig component

[Henry Vermaak]

On 21 June 2010 15:10, Graeme Geldenhuys <graemeg.lists at gmail.com> wrote:
> Op 2010-06-21 15:34, Henry Vermaak het geskryf:
>>
>> Seriously, would you try the same thing with a file?
>
> Seriously, you would want to tell developers in todays times that they
> can't concurrently access a file?

No, that's not what I'm saying.  You need to make it work.  Your
complaint is like saying the write syscall doesn't do the right thing
when I use it on the same file from two different places.  It _can_
work, but it's your job to do it correctly.

>> Programs that want to write to the same json file from
>> different classes need to handle this properly, just like they would
>> have to when using files.
>
> Unfortunately TJSONConfig and TXMLConfig encapsulates the file handling -
> it's not available to the developer to change. So the file handling fix
> needs to occur in these components themselves.

You can create a class that wraps all the json operations, and
therefore handle concurrency in one place.  You're only using one json
file after all.

Henry