[Uml-devel] Suggestion: Use temp file also for local save

[Achim Spangler]

Hi,
umbrello uses at the moment a direct save into the target file, if the file is 
_not_ on network.

This can result in broken files, if umbrello crashes during the write process.

So I suggest to use a temp file for all cases.
As soon as the temp file is written, we can use a KIO job to move the temp 
file to the target position/name. As this KIO job should hopefully use some 
robust and quick system calls, this process should run save.

This would allow us, to insert step by step some success checks for saveToXMI, 
so that we can restrict the overwrite of the target file to cases where the 
saveToXMI process is running without faults.

If this suggestion looks sensible to you, you can simply commit the attached 
small diff.

Bye,
Achim
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