Re: Digest for jna-users@googlegroups.com - 3 updates in 1 topic

[Bo Vidar Göran Lundgren]

Hi and thanks for answers - I am a real newbie to this. I extracted the jnidispatch.dll and put it in the installation_directory/lib and I also set the following arguments in Intellij which I use for installation:
"-Djava.library.path=lib" "-Djna.nounpack=true" "-Djna.nosys=true"
but then I get the following error:

024-05-29 14:51:30.788 ERROR An unrecoverable error has occurred: java.lang.UnsatisfiedLinkError: Could not find JNA native support
at com.sun.jna.Native.loadNativeDispatchLibraryFromClasspath(Native.java:1013)

 

On Wed, May 29, 2024 at 8:30 AM <jna-...@googlegroups.com> wrote:

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• loadNativeDispatchLibraryFromClasspath loads wrong jna-dll - 3 Updates

loadNativeDispatchLibraryFromClasspath loads wrong jna-dll

"Bo Vidar Göran Lundgren" <vidar...@gmail.com>: May 28 06:23AM -0700 Hi Neil thanks for you answer but I am still confused, when I install the application the DLL is not extracted. They seem to have a group policy that permits the usage - do you know how I can get around this ?

"Daniel B. Widdis" <wid...@gmail.com>: May 28 09:56AM -0700 When the JNA library path is not specified and it's not present in any of the expected locations described in the javadoc, JNA extracts that DLL from the class path, and then saves it to a temporary location. The code where it's saved to a temp file like the one you've shown is here: https://github.com/java-native-access/jna/blob/40f0a1249b5ad03020b5a2b66f42b9546e6d4edf/src/com/sun/jna/Native.java#L1165-L1184   As you can see in that code block, you can set jnidispatch.preserve to automatically delete that temp file on (clean) exit (in OpenJDK, at least.)   As Neil said, the best way to prevent this is to pre-extract the library and save it in a known location that you make sure is available to JNA when it starts up. Then it will never get to this temp file path.   On Tue, May 28, 2024 at 6:23 AM Bo Vidar Göran Lundgren <   -- Dan Widdis

Neil C Smith <ne...@codelerity.com>: May 28 08:04PM +0100 > As Neil said, the best way to prevent this is to pre-extract the library and save it in a known location that you make sure is available to JNA when it starts up. Then it will never get to this temp file path.   The following link is also possibly more useful and current than the one I shared before, which doesn't seem to cover current default behaviour - https://javadoc.io/static/net.java.dev.jna/jna/5.14.0/overview-summary.html#loading   Best wishes,   Neil     -- Neil C Smith Codelerity Ltd. www.codelerity.com   Codelerity Ltd. is a company registered in England and Wales Registered company number : 12063669 Registered office address : 3rd Floor Suite, 207 Regent Street, London, W1B 3HH, England

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