[JIRA] Commented: (MDA-39) Improve Command Line Interface

[Ian Young (JIRA)]

    [ https://issues.shibboleth.net/jira/browse/MDA-39?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13573#comment-13573 ] 

Ian Young commented on MDA-39:
------------------------------

Treating this as an omnibus "improve the CLI" sink...

I'd like to have a way of terminating the CLI by throwing an exception without ending up with a stack trace.

At the moment, I throw a custom subclass of StageProcessingException called ...TerminationException, which is handled by the CLI like this:

        } catch (Exception e) {
            log.error("Error processing information", e);
            System.exit(1);
        }

This results in a stack dump, which isn't very "CLI-ish" to me.  I think what I'd prefer would be for the CLI to know about a specific Exception of its own that I could throw to get the log.error and System.exit but without the stack dump.  It would probably also have to be a subclass of StageProcessingException in order to propagate through the rest of the system properly.  I suggest net.shibboleth.metadata.pipeline.TerminationException.

> Improve Command Line Interface
> ------------------------------
>
>                 Key: MDA-39
>                 URL: https://issues.shibboleth.net/jira/browse/MDA-39
>             Project: Metadata Aggregator
>          Issue Type: Improvement
>          Components: Command Line
>    Affects Versions: 0.6
>            Reporter: Chad La Joie
>            Assignee: Chad La Joie
>             Fix For: 0.7
>
>
> To date the command line has been very simplistic, improve it in the following ways:
> * provide a help command that outputs the parameters supported by the CLI
> * allow Spring environment variables, which may then be used in the config files, to be set on the command line
> * allow for silent and verbose logging options

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