README

Caesar is an evolution of the Nero codebase, which is made more generic. In essence, Caesar receives classifications from the event stream (a Lambda script sends them to Caesars HTTP API).

• Documentation
• Production
• Staging

Development

Prepare the Docker containers:

docker-compose build
docker-compose run --rm app bin/rails db:setup
docker-compose run --rm -e RAILS_ENV=test app bin/rails db:create

Run tests with:

docker-compose run --rm -e RAILS_ENV=test app bin/rspec

Or interactively / manually in a docker shell

docker-compose run --rm -e RAILS_ENV=test app bash
# from the bash prompt
bin/rspec

Start a local server with:

docker-compose up

To have it listen to the stream:

AWS_REGION=us-east-1 kinesis-tail zooniverse-staging | bin/stream_to_server

Or to override the configuration for a given workflow, create a local file in tmp/ (or anywhere else, but that directory is ignored by git) and run:

AWS_REGION=us-east-1 kinesis-tail zooniverse-staging | bin/override_workflow_configuration workflow_id tmp/path_to_nero_config.json | bin/stream_to_server

Kinesis / Lambda

Panoptes posts classifications into Kinesis. Caesar has a Lambda script that reads in from Kinesis and then POSTs those into Caesar's API. Docs on how to change that lambda script are in the kinesis-to-http directory.

Mutation tests

RAILS_ENV=test bundle exec mutant -r ./config/environment --use rspec Reducers::ExternalReducer