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 >> > >> > >> >>
