Andi Heusser wrote:
> I have a web application where I need to load some 3rd party libraries
> DLLs) and I would like to have these DLLs in a subdirectory in my app
> (webapps/MyApp/WEB-INF/lib). However when I try to do a 'loadLibrary' it
> fails to find them. I then noticed that the 'Tomcat/bin' directory is in
> this path and if I copy the DLLs in there, then it works fine.
>
> I've tried to set the system property inside my app in the static
> initializer of the main class but that doesn't seem to work. I basically
> tried to do the following:
>
> static{
>
> String libPath = System.getProperty("java.library.path");
>
> String myLibPath = System.getProperty("myapp.lib.path");
> //env var set in PC's system variables (WinXP)
>
> System.setProperty("java.library.path", libPath +
> File.pathSeparator + myLibPath);
>
> }
This is not Tomcat specific. java.library.path is readonly, so this won't
work. You'll have to set the property on startup of the JVM, i. e.
add -Djava.library.path=<your path> to the JVM's arguments.
> I also looked through the Tomcat conf files but I couldn't find any place
> where I could properly set or override the java.library.path.
>
> Is there a way to set this in Tomcat or will I have to copy the DLLs into
> Tomcat's bin directory?
If you start Tomcat with the shell scripts, you can create a file named
setenv.sh (resp. setenv.bat on Windows) where JAVA_OPTS is set appropriately.
If you use the service launcher, you'll have to define this somewhere in the
GUI.
Regards
mks
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