Unable to run WLST getMDSArchiveConfig from ANT

Question

I am having a problem using Ant to execute the setAppMetadataRepository WLST command. This command puts an entry in adf-config.xml that points to the MDS datasource.
This is the ant task that I'm using. These commands work from the WLST tool, but when using them with Ant, I get the error below.
<target name="setAppMetadataRepositoryUsingWlst">
<wlst debug="true" failonerror="true">
<script>
archive = getMDSArchiveConfig(fromLocation='D:/JDEV/deploy/portal.ear')
archive.setAppMetadataRepository(repository='mds-portalRepository',partition='Portal_v2', type='DB', jndi='jdbc/wcpcustom')
archive.save()
</script>
</wlst>
</target>
Here is the error that I get (NameError: getMDSArchiveConfig). This is saying that getMDSArchiveConfig isn't a recognized command. Other commands (like connect(...)) work ok from ant, but not these MDS commands. Is this a bug or am I doing something wrong here?
[wlst] <WLSTTask> All lines will be trimmed by 12
[wlst] <WLSTTask> Line: archive =getMDSArchiveConfig(fromLocation='D:/JDEV/deploy/portal.ear'). Final trim length: 12, String length: 104
[wlst] <WLSTTask> Line: archive.setAppMetadataRepository(repository='mds-portalRepository',partition='Portal_v2', type='DB', jndi='jdbc/wcpcustom'). Final trim length: 12,
String length: 147
[wlst] <WLSTTask> Line: archive.save(). Final trim length: 12, String length: 26
[wlst] <WLSTTask> The script that will be executed
[wlst] archive = getMDSArchiveConfig(fromLocation='D:/JDEV/deploy/portal.ear')
[wlst] archive.setAppMetadataRepository(repository='mds-portalRepository',partition='Portal_v2', type='DB', jndi='jdbc/wcpcustom')
[wlst] archive.save()
[wlst]
[wlst] Error: Error executing the script snippet
[wlst] archive = getMDSArchiveConfig(fromLocation='D:/JDEV/deploy/portal.ear')
[wlst] archive.setAppMetadataRepository(repository='mds-portalRepository',partition='Portal_v2', type='DB', jndi='jdbc/wcpcustom')
[wlst] archive.save()
[wlst]
[wlst] due to:
[wlst] Traceback (innermost last):
[wlst] File "<string>", line 1, in ?
[wlst] NameError: getMDSArchiveConfig
Regards,
Ashish

Answer 1

Hi Timo, Thanks for the quick response.
I have checked John's reply but there is no solution to it.
The big question here is how to automate builds if the Weblogic installations do not support WLST to modify MDS configurations. We are very much into production now, and still Jdev builds are the process. We need to integrate with Hudson, but for it the above problem should be resolved.
Please suggest a workaround if possible, there are a lot of posts on internet with the same problem but no solution..