[logback-dev] [JIRA] Created: (LBCLASSIC-302) ContextInitializer.configureByResource(URL url) should properly indicate whether configuration succeeded or not

[David Tonhofer (JIRA)]

ContextInitializer.configureByResource(URL url) should properly indicate whether configuration succeeded or not
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                 Key: LBCLASSIC-302
                 URL: http://jira.qos.ch/browse/LBCLASSIC-302
             Project: logback-classic
          Issue Type: Improvement
          Components: Other
    Affects Versions: 0.9.30
            Reporter: David Tonhofer
            Assignee: Logback dev list
            Priority: Minor


Scenario:

- I have a list of resources to be tried in turn for configuration with "first one wins"
- Having built the URL, I call "configureByResource(URL url)"

Problem: I do not know whether this resulted in successful configuration.

-> Case of a resource ending not ending in "xml" or "groovy" ---> Return without error but with any configuration 
-> Case of a resource ending in "xml" and successful configuration  ---> Return without error and successful configuration (and registered as "safe configuration", too)
-> Case of a resource ending in "xml" and XML errors  --->  Return without error and no config change
-> Case of a resource ending in "xml" and I/O exception ---> Return with raised JoranException
-> Case of a resource ending in "groovy" and no Groovy  ---> Return without error and no config change
-> Case of a resource ending in "groovy" and Groovy errors  --->  Unsure whether GafferUtil.runGafferConfiguratorOn() can throw Runtime Exceptions from Groovy
-> Case of a resource ending in "groovy" and no Groovy errors ---> Return without error and successful configuration

This should be made clearer as far as possible:

--> One "ConfigurationException" if there was a problem, with the "cause" telling what
--> Normal return with "true" --> Configuration successfully changed
--> Normal return with "false" --> Configuration was not changed (i.e. a NOP)





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