Maybe you could rename and overwrite the files. On Mon, 7 Sep 2020 at 10:42, Manuel Souto Pico <terminola...@gmail.com> wrote:
> Hi there again, > > Unfortunately the suggested solution --method deleteOnExit()-- didn't > really help. I thought it was working but for some reason the files I had > to delete were not locked at that particular moment. Maybe because the Java > application had been running but idle for some time... I don't know, the > lock (or the lock release) seems to happen a bit randomly. > > In any case, I'm still looking for a good workaround. > > In the absence of anything better, I will use ByteArrayOutputStream, as I > explained in my original message, to deplete the locked files (deleting > their contents) and then kill the application and run a post-processing bat > script that deletes empty files. I know this is a hack, but I don't see how > else I can do this. > > Tips welcome. > > Cheers, Manuel > > Manuel Souto Pico <terminola...@gmail.com> escreveu no dia domingo, > 6/09/2020 à(s) 23:01: > >> Thank you so much, J. David. >> >> Your suggestion works like a charm. Really grateful for that, and really >> glad I asked in this list :-) >> >> I will update the Stackoverflow page. >> >> Have a great day. >> Cheers, Manuel >> >> J. David Beutel <l...@getsu.com> escreveu no dia domingo, 6/09/2020 à(s) >> 22:37: >> >>> Hi Manuel, >>> >>> I don't know if this would work, but have you tried File.deleteOnExit()? >>> >>> Cheers, >>> 11011011 >>> >>> >>> On 2020-09-06 08:26 , Manuel Souto Pico wrote: >>> > Hi there, >>> > >>> > This is my first message to this list. >>> > >>> > I am a translator who writes scripts in groovy every now and then to >>> > automate some tasks, although I'm not really a programmer. >>> > >>> > I have written a script that downloads some plugins (jar files) and >>> > the script runs within the Java environment that uses those plugins. >>> > The script must download the latest version of the plugin, >>> > overwrite it if it already exists locally and delete any other >>> > (earlier) versions of the same plugin. >>> > >>> > For example, the script downloads remote >>> > file plugin-omt-package-1.6.3.jar from a certain URL, and must delete, >>> > say, existing local file plugin-omt-package-1.6.2.jar. >>> > >>> > The problem: >>> > >>> > However, existing local files are locked by my Java application >>> > (within which the groovy script runs) so the script doesn't delete >>> > them. Apparently there is a bug on Windows (not on Linux) which is why >>> > a Java application cannot easily release the lock. >>> > >>> > Somebody explains the bug in this thread >>> > >>> https://stackoverflow.com/questions/4179145/release-java-file-lock-in-windows/48489019#48489019 >>> > >>> > I have followed the suggestion in that page and tried to >>> > use ByteArrayOutputStream in my delete_other_versions function: >>> > >>> > ByteArrayOutputStream bos = new ByteArrayOutputStream(0); >>> > FileOutputStream fos = new FileOutputStream( new File(path_to_file) ); >>> > bos.writeTo(fos); >>> > fos.close(); >>> > >>> > System.gc() >>> > file.delete() // me beating about the bush >>> > >>> > My full code is here: >>> > https://gist.github.com/msoutopico/7b2b340e9cec830f4b2ce207575e7525 >>> > >>> > That seems to delete the content of the files (I can see they have now >>> > a size of 0 kb), but not the files themselves. >>> > >>> > I would be grateful for further suggestions for workarounds about ways >>> > I could manage to delete them. >>> > >>> > Thanks in advance. >>> > >>> > Cheers, Manuel >>> > >>> > >>> >>>
