Add pluggable repository layer

[hiepd]

Repository consists of

• generic repository
• nosql repository

Part of #34

Usage:

import (
  "context"
  "github.com/theycallmemac/odin/odin-engine/pkg/repository"
  _ "github.com/theycallmemac/odin/odin-engine/pkg/repository/all"
)

repo, err := repository.GetRegistration("mongodb").OpenFunc("localhost:27017", nil)

repo.GetJobStats(context.Background(), "123")

With odin-engine

./odin-engine -storage_name=mongodb -storage_address=localhost:27017

[theycallmemac]

This all looks quite good so far. Just worth mentioning that along with the observability table there is also a jobs table.

[theycallmemac]

@hiepd the build is failing because github.com/theycallmemac/odin/odin-engine/pkg/repository/nosql doesn't exist in the master branch yet. That's to be expected right now.

[theycallmemac]

There's some Github Actions failing on this, but I'm not too worried about this right now. There's likely some logic here and there that needs some changes.

I see you specify the datastore when you run the odin-engine binary. It could potentially be better for the user to define their datastore details in https://github.com/theycallmemac/odin/blob/master/odin-engine/config/odin-config.yml.

[hiepd]

Thanks @theycallmemac . I have changed the code to use config-odin.yml like requested. There are some formatting changes in api/main.go as well since the file wasn't formatted.

I think we can also figure out how to run migration for relational storage in the future as well.

[theycallmemac]

Okay this is looking good as far as the changes are concerned. I'll take a look at the failing build and see if I can get it fixed!

[theycallmemac]

@hiepd Having a quick look. The dependency step is breaking because /pkg/repository doesn't exist in the master branch, once this is merged it should fix it.