Accessign eXist via XMLDB problem

[Nick]

Hi everybody,
I am trying to employ eXist via XML:DB. One of the requirements is to 
have eXist as a separate web application, so the option of integrating 
it into Cocoon is unavailable. As far as I understood it from available 
documentation for XMLDBTransformer and eXist, eXist driver has to be 
configured within cocoon.xconf for the XML:DB protocol.

I configure it as follows:
<><component-instance 
class="org.apache.cocoon.components.source.impl.XMLDBSourceFactory" 
name="xmldb">
   <driver class="org.exist.xmldb.DatabaseImpl" type="exist"/>
</component-instance> 

Then I copy the following eXist libraries to the WEB-INF/libs directory:
Catalina-util.jar
Exist.jar
Exist-optional.jar
Libreadline-java.jar
Xmldbc.jar
<>Xmlrpc-1.2.jar 

This supposedly gets all the classes required. <> 

However, when I try to access http://localhost:8080/cocoon-2.1.5/, I 
receive an error message: 

 HTTP Status 500 -
------------------------------------------------------------------------
*type* Exception report
*message*
*description* _The server encountered an internal error () that 
prevented it from fulfilling this request._

*exception*
javax.servlet.ServletException: Servlet.init() for servlet Cocoon threw exception
       org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:164)
       org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:206)
...
       java.lang.Thread.run(Unknown Source)
*root cause*
java.lang.AbstractMethodError: 
org.exist.xmldb.DatabaseImpl.getNames()[Ljava/lang/String;
       org.xmldb.api.DatabaseManager.registerDatabase(Unknown Source)
       
org.apache.cocoon.components.source.impl.XMLDBSourceFactory.configure(XMLDBSourceFactory.java:96)
       
org.apache.avalon.framework.container.ContainerUtil.configure(ContainerUtil.java:240)
...     
       org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:688)

<>
       java.lang.Thread.run(Unknown Source)
This is caused by the incompatibility of cocoon 2.1.5 libraries  (2.1.4 
works just fine).

<>Is there anybody who have already solved this problem and succeeded in 
accessing eXist through xmldb? If possible, can you also explain how to 
specify URI of the eXist database with xmldb?

Thank you very much in advance.
<>Sincerely,
Nick.
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