JNDI resources not available for Gemini Blueprint running in Tomcat 9 (working in Bundle Activator) - spring

Question

I have an older Web-Application using Eclipse RAP 3.0 with Equinox OSGI-Container and Gemini Blueprint 1.0.2.
I can define my JDNI Values in server.xml
link them in context.xml and use them in my web.xml.
In my launch.ini i use the parent classloader fwk so the JNDI configuration is passed to the OSGI-Container.
My Application-Bundles can read those values for example in Bundle-Activator:
String xxx= InitialContext.doLookup("java:comp/env/xxx"); or
String xxx= new InitialContext().lookup("java:comp/env/xxx");
Some Bundle-Configuration is done via Gemini Blueprint xml files and SpringConfiguration Java classes.
<jee:jndi-lookup id="xxx" jndi-name="java:comp/env/xxx" />
This part is not working and i get following error
Error creating bean with name 'xxx': Invocation of init method failed;
nested exception is javax.naming.NameNotFoundException:
Name [java:comp/env/xxx] is not bound in this Context. Unable to find [java:comp].
I get the same Error when i use Spring-Java-Configuration which is invoked from gemini blueprint xml. Then statements like new InitialContext().lookup("java:comp/env/xxx") don't work and i get the same exception.
I think it has to to with the classloaders that are different for Bundle-Activator-Code and Gemini BlueprintExtender Thread but in can't figure it out how to solve this.

Answer 1

I found a Solution that i can use.
If i Move my JNDI-Lookups from xml into my Spring-Configuration-class then i can change the clasloader in init like this:
Thread.currentThread().setContextClassLoader(this.getClass().getClassLoader());
After that i my Lookups work fine.
i found that solution here
Can Spring Boot be used with OSGi? If not, any plans to have an OSGi Spring Boot?.