JNI libs and Tomcat?

["Dr. Evil" <dr...@sidereal.kz>]

Hi, I'm trying to get Jmagick (a JNI interface for Imagemagick) to
work with my favorite web server, which is Tomcat 4.  In the release
notes, it says:

Applications that require native libraries must ensure that the
libraries have been loaded prior to use.  Typically, this is done with
a call like:
 
  static {
    System.loadLibrary("path-to-library-file");
  }

However, when I put in /usr/local/lib/libImagemagick.so in there, and
put it in a Listener that starts when the app starts, I get an error
that path separators are not allowed in the loadLibrary method.  I
tried putting that library in the $TOMCAT/lib directory, and taking
out the full path, and that didn't work.  Any sugestions?

Thanks!

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Re: JNI libs and Tomcat?

[Janek Bogucki <ja...@yahoo.co.uk>]

 --- "Dr. Evil" <dr...@sidereal.kz> wrote: > 
> Hi, I'm trying to get Jmagick (a JNI interface for
> Imagemagick) to
> work with my favorite web server, which is Tomcat 4.
>  In the release
> notes, it says:
> 
> Applications that require native libraries must
> ensure that the
> libraries have been loaded prior to use.  Typically,
> this is done with
> a call like:
>  
>   static {
>     System.loadLibrary("path-to-library-file");
>   }
> 
> However, when I put in
> /usr/local/lib/libImagemagick.so in there, and
> put it in a Listener that starts when the app
> starts, I get an error
> that path separators are not allowed in the
> loadLibrary method.  I
> tried putting that library in the $TOMCAT/lib
> directory, and taking
> out the full path, and that didn't work.  Any
> sugestions?
> 
> Thanks!
> 
> --

try System.load instead of System.loadLibrary.

   static {
     System.load("/usr/local/lib/libImagemagick.so");
   }


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Re: JNI libs and Tomcat?

["Craig R. McClanahan" <cr...@apache.org>]

On 7 Jan 2002, Dr. Evil wrote:

> Date: 7 Jan 2002 20:37:07 -0000
> From: Dr. Evil <dr...@sidereal.kz>
> Reply-To: Tomcat Users List <to...@jakarta.apache.org>
> To: tomcat-user@jakarta.apache.org
> Subject: JNI libs and Tomcat?
>
>
> Hi, I'm trying to get Jmagick (a JNI interface for Imagemagick) to
> work with my favorite web server, which is Tomcat 4.  In the release
> notes, it says:
>
> Applications that require native libraries must ensure that the
> libraries have been loaded prior to use.  Typically, this is done with
> a call like:
>
>   static {
>     System.loadLibrary("path-to-library-file");
>   }
>
> However, when I put in /usr/local/lib/libImagemagick.so in there, and
> put it in a Listener that starts when the app starts, I get an error
> that path separators are not allowed in the loadLibrary method.  I
> tried putting that library in the $TOMCAT/lib directory, and taking
> out the full path, and that didn't work.  Any sugestions?
>

The rules inside Tomcat are the same as for JNI accessed libraries in
any Java application:

* The argument to loadLibrary() must be a *filename* not
  a *pathname*.

* The corresponding library file has to be on the PATH environment
  variable (not CLASSPATH).

> Thanks!
>

Craig


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