Dan Haywood created ISIS-1455:
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Summary: Improve metamodel invalid exception handling
Key: ISIS-1455
URL: https://issues.apache.org/jira/browse/ISIS-1455
Project: Isis
Issue Type: Improvement
Components: Core, Core: Viewer: Wicket
Affects Versions: 1.12.2
Reporter: Dan Haywood
Assignee: Dan Haywood
Priority: Minor
Fix For: 1.13.0
At the moment the MMV error handling works only "by accident":
- if an validation failure is found then the remaining initialization of
authentication manager and persistence is skipped.
- attempting to go to the login causes a null pointer exception
- this exception is caught and then the MMV thrown
This also raises an issue for implementations of - say - the ThemeProvider that
want to make database queries, eg via Settings service. The todoapp does this.
So, instead, we should always do the complete initialization even if there is a
metamodel validation exception, but then intercept any such exceptions and
route the MmvErrorPage thereafter.
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