Code clean up / refactor

[avinassh]

Rust versions are bad, could use some love in refactoring

secondly, a lot of code is repeated. applying DRY would make it better

[darleybarreto]

On a side note about refactor, why do you need 1 and 2?

[avinassh]

@darleybarreto those prepare the batch in a vector, which is later sent to writer over a channel

[darleybarreto]

Hmm. I'm confused, aren't you sending vector in both tx.send(ParamValues::WithArea(vector)).unwrap();/tx.send(ParamValues::WithoutArea(vector)).unwrap();?