Gazetteer cleanup listener

[hkkenneth]

For #25

[mbelousov]

@hkkenneth, great! Well done! Just thinking, do we need to have something similar to clean output directory before job execution (to remove outputs from previous run)? @healtex/deid

[hkkenneth]

It can be easily done with a beforeJob() method with an almost identical implementation - do we have any use cases which we may want to keep the files from the previous run?

[hkkenneth]

On a different note, I think in the future, we could have a configuration to let advanced users keep the gazetteer files after the job: to inspect them, or to use the files to customize their own gazetteers?

[mbelousov]

@hkkenneth For the first version (consider the desktop application) we could just use name of the input folder and then create corresponding folders: {name}-gazetteers (for step1) and {name}-results (for step2) in that case we will be able to run multiple instances of app (e.g. processing two datasets at the same time).
Agree that it might be a good idea to keep gazetteers, so we can a corresponding option to our workflow and in the desktop app we could have a checkbox.

[hkkenneth]

What's {name} here? But can't users already achieve the same effect with separate workspace?

[mbelousov]

@hkkenneth , yep, workspace sounds like a better option.