[jira] [Updated] (JOSHUA-275) Revamp the Configuration System

["Lewis John McGibbney (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/JOSHUA-275?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Lewis John McGibbney updated JOSHUA-275:
----------------------------------------
    Fix Version/s: 6,2

> Revamp the Configuration System
> -------------------------------
>
>                 Key: JOSHUA-275
>                 URL: https://issues.apache.org/jira/browse/JOSHUA-275
>             Project: Joshua
>          Issue Type: Improvement
>    Affects Versions: 6.1, 6.2, 7
>            Reporter: Kellen Sunderland
>             Fix For: 6,2
>
>
> I'd like to propose we centralize Joshua's configuration system to make use of typesafe/config https://github.com/typesafehub/config .  This config system looks like JSON but with comments so it's easy to read.  Because it's JSON it supports hierarchies of configurations, lists of configuration etc quite easily.  It has some nice features like parsing time automatically.  The main advantage here though is that we have a standard config system that doesn't have to be manually parsed.
> Here's a quick example of how we can use it:
> {code:java}
>     @Inject    
>     public PackedGrammar(@TypesafeConfig("PackedGrammar.grammar_dir")
>                          String grammar_dir,
>                          @TypesafeConfig("PackedGrammar.span_limit")
>                          int span_limit, 
>                          String owner, 
>                          String type) throws FileNotFoundException, IOException ...
> {code}
> and then a config similar to
> \# Joshua configuration file
> {code:javascript}
> config = {
>     default-non-terminal = X
>     goal-symbol = GOAL
>     ...
>     
>     PackedGrammar: {
>         type: thrax,
>         grammar_dir: /local/grammars/...
>         span_limit: 50
>     }
>     ...
> }
> {code}
> Version: TBD, but it's a breaking change so we may consider putting it in Joshua 7.
> Totally open to other config / injection systems if others want to suggest any of their favorites.



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