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Bundle-NativeCode problem [message #105646]

Fri, 29 February 2008 13:31

Dmitry Hazin

Messages: 6
Registered: July 2009

Junior Member

Hi,

I created the bundle for Berkeley DB XML that uses some native
libraries. Native libraries are put into fragment-bundle with the
following Bundle-NativeCode directive:
Bundle-NativeCode: msvcr71.dll ; msvcp71.dll ; libdb45.dll ;
libdb_java45.dll ; xerces-c_2_7.dll ; xqilla10.dll ; libdbxml23.dll ;
libdbxml_java23.dll ;
osname = win32 ;
processor = x86

I've analyzed the dlls dependencies so they are listed in the right
order left to right as described in 3.9.1 Native Code Algorithm section
of the OSGi specification.
The versions of equinox bundles are
org.eclipse.equinox.common_3.3.0.v20070426.jar and
org.eclipse.osgi_3.3.1.R33x_v20070828.jar

The problem is that if I start my example bundle with the above
configuration (either from Eclipse or console) I get the "libdb45 not
found" error. But if I explicitly load dlls by System.loadLibrary() call
in the Activator they are loaded correctly and my example bundle works.
Hence it seems that equinox doesn't follow the order of the dlls from
Bundle-NativeCode directive when loading the libraries.
Am I missing something here or should I always explicitly call
System.loadLibrary() for my bundle?

Thanks,
Dmitry

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Re: Bundle-NativeCode problem [message #105836 is a reply to message #105646]

Tue, 04 March 2008 07:17

Danail Nachev

Messages: 110
Registered: July 2009

Senior Member

Hi,

The Bundle-NativeCode doesn't load the libraries. It is used to describe
the included native libraries in the bundle. The equinox will use this
information to select the appropriate library for the OS/Arch and
extract it and make it available for your System.loadLibrary() call. It
won't call loadLibrary() for you. Your bundle needs to take care of this
call (either in the Activator or in some static initializer).

Danail

dhazin wrote:
> Hi,
>
> I created the bundle for Berkeley DB XML that uses some native
> libraries. Native libraries are put into fragment-bundle with the
> following Bundle-NativeCode directive:
> Bundle-NativeCode: msvcr71.dll ; msvcp71.dll ; libdb45.dll ;
> libdb_java45.dll ; xerces-c_2_7.dll ; xqilla10.dll ; libdbxml23.dll ;
> libdbxml_java23.dll ;
> osname = win32 ;
> processor = x86
>
> I've analyzed the dlls dependencies so they are listed in the right
> order left to right as described in 3.9.1 Native Code Algorithm section
> of the OSGi specification.
> The versions of equinox bundles are
> org.eclipse.equinox.common_3.3.0.v20070426.jar and
> org.eclipse.osgi_3.3.1.R33x_v20070828.jar
>
> The problem is that if I start my example bundle with the above
> configuration (either from Eclipse or console) I get the "libdb45 not
> found" error. But if I explicitly load dlls by System.loadLibrary() call
> in the Activator they are loaded correctly and my example bundle works.
> Hence it seems that equinox doesn't follow the order of the dlls from
> Bundle-NativeCode directive when loading the libraries.
> Am I missing something here or should I always explicitly call
> System.loadLibrary() for my bundle?
>
> Thanks,
> Dmitry

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