[opencms-dev] OpenCms Module Developer problem

[Thorsten Duhn]

Hello,

im just trying to get a Eclipse IDE for developing template and modules 
on a current OpenCms system. Tried the "Developing OpenCms with Eclipse" 
Wiki page, but can't get it together. I have a virtual Ubuntu with 
Tomcat, OpenCms setup done, Eclipse running, Git cloned and a project 
which has no build errors left. Unfortunately plugins website is down 
for some days now, as the "Eclipse integration" Wiki page refers to that 
for further installation and usage details (in form of video). Now I 
always end with following "loader constraint violation" exception when 
trying to use Project Wizard or trying to copy the nevertheless created 
Project to my OpenCms instance.

java.lang.LinkageError: loader constraint violation: when resolving 
method 
"info.rsdev.eclipse.opencms.module.developer.compatibility.CmsCompatibilityHelper.initCmsSystemInfo(Lorg/opencms/main/CmsSystemInfo;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;)V" 
the class loader (instance of 
info/rsdev/eclipse/opencms/module/developer/loader/OpenCmsClassLoader) 
of the current class, org/opencms/main/Communicator, and the class 
loader (instance of 
org/eclipse/osgi/internal/baseadaptor/DefaultClassLoader) for resolved 
class, 
info/rsdev/eclipse/opencms/module/developer/compatibility/CmsCompatibilityHelper, 
have different Class objects for the type y.CmsCompatibilityHelper used 
in the signature

/Randomly/ I also got "IllegalArgumentException: A SPI class of type 
org.apache.lucene.codecs.Codec with name 'Lucene42' does not exist" instead.

My current setup:

Ubuntu 13.10
Tomcat 7.0.42
MySQL 5.5.34
Eclipse Kepler SR1 For Java EE
OpenCms 8.9.0
OpenCms Module Developer 0.0.9

I also have problems following instructions on the Wiki page on some 
other issues. F.i. it is not mentioned that "opencms.jar" needs to be 
added to Build Path as well (I took the one from my servers 
WEB-INF/lib). And Ant configuration is a miracle as well, I cannot find 
"ant-opencms-1.1.jar" and I'm not sure about the actual property and 
Tools configuration values.

I had no luck googling on this issues, maybe just my fault, but some 
hints are quite welcome.

Regards,
Thorsten