Dataiku API Service: pricing

Created in API designer menu in dataiku project.

Endpoint: Recalculate

Background

The Pricing backend initially finds similarities between CPCs and from the 10 closest or so, compute a recommended price for the target CPC (median + business rules, overlays, etc.)

However some of the initial neighbors CPCs might not be comparable from business point of view and they remove them. The new recommended price must be recomputed, that is where the API is used.

Goal

Recompute the recommended price given the target and a list of neighbor CPCs.

Requirements

• Code shared between API and project, not duplicated
• Access to project's intermediate datasets to recompute only what is necessary
• Dataiku project ↔ API ↔ Webapp connections in different environment should match

Solution

• Code shared between project initial computation and API is in functions in project's library, not directly in recipes
• Datasets: a mix of PostgreSQL tables and managed folders in project, so we choose to connect to project's and access datasets with dataiku api (alternative would have been direct connection to postgresql if only postgresql tables for example, etc)
• API connects to remote DSS instance using a "Global API key" that should be set at instance level. This key must have appropriate rights for project and should be impersonated.
  
• Remote DSS is set depending on API host
  

Additionnal settings

• Security: The API service is not public but an API key is created for webapp that should use it when calling the API. If other components need to use the API they should use nother api key.