Native library loading problem

Question

Hi Folks,
I currently downloaded, and compiled the bDB core using VS 2010 x64 (I run 64 bit win7, and JRE 64 bit). In Eclipse I'm trying to use the native library (setting up the path correctly), however the java is complaining that it cannot find dependencies.
I switched to JE, it works fine, but I'm not sure if JE is as performant as the core version. Anybody had the same problem?
thanks in advance
Edited by: user5493457 on Mar 22, 2011 3:35 AM

Answer 1

Hi,
Please review the building process of the Berkeley DB libraries, to ensure you have correctly built them. Review Building Berkeley DB for Windows, Building the Java API and Java configuration. If you want to build 64-bit libraries, make sure you select x64 as platform configuration in Visual Studio when building.
I assume you are getting a java.lang.UnsatisfiedLinkError exception at runtime. Just to make sure Eclipse correctly finds the native BDB libraries, in your Run Configuration for the project you're trying to run, under Environment, add a new variable, LD_LIBRARY_PATH with a value of something like D:\BerkeleyDB\db-5.1.25\build_windows\x64\Debug (substitute Debug with Release depending on how you built the libraries) -- this is the path to the location of the native BDB libs, libdb51d.dll and libdb_java51d.dll (or libdb51.dll and libdb_java51.dll), so you should change it as appropriate for your system.
Also, for that Run Configuration add a new variable, CLASSPATH with a value of something like D:\BerkeleyDB\db-5.1.25\build_windows\x64\Debug\db.jar;D:\BerkeleyDB\db-5.1.25\build_windows\x64\Debug\classes (this is the path to the Java API classes and the Java API jar file -- db.jar). Make sure that "Append environment to native environment" option is checked, in the Run Configurations screen.
Regards,
Andrei