Decouple the IEmissionsDataSource and IForecastDataSource Interface

[esgraham]

Description

As a Carbon Aware Data Source developer, I want to add new data sources that may not have all current SDK functionality - including data sources that have only Emissions data but not Forecast data, so I can plug the data source into the SDK without having to throw a NotImplementedException for functionality that does not exist in the data source.

Data Source Interfaces ADR

Acceptance Criteria

• [x] Ensure that the IEmissionsDataSource interface can be implemented by a data source developer without implementing the IForecastDataSource interface
• [x] Ensure that the IForecastDataSource interface can be implemented by a data source developer without implementing the IEmissionsDataSource interface
• [x] Unit Tests are completed and code passes tests

Verify that the following WebAPI routes can be executed and return the expected results:

• [x] GET emissions/bylocation
• [x] GET emissions/bylocations
• [x] GET emissions/bylocations/best
• [x] GET emissions/forecasts/current
• [x] POST emissions/forecasts/batch
• [x] GET emissions/average-carbon-intensity
• [x] POST emissions/average-carbon-intensity/batch

Verify that the that following CLI routes can be executed and return the expected results:

• [x] emissions
• [x] emissions-forecasts

Dependencies

https://github.com/Green-Software-Foundation/carbon-aware-sdk/issues/170

Task List

• [x] Create IEmissionsDataSource, NullEmissionsDataSource, EmissionsAggregator + Tests, Updates Consumers @bderusha
• [x] Create IForecastDataSource, NullForecastDataSource, ForecastAggregator + Tests, Updates Consumers @pritipath
• [x] JSON data source config changes
• [x] WattTime data source config changes
• [x] Update default config to use NullDataSources
• [x] clean up step of removing unused refactored code. POSSIBLE PR AT THIS POINT
• [x] Split config into two data source
• [x] require that AT LEAST ONE data source is configured
• [x] remove forecasting methods and interface from JSON
• [x] Update documentation for configuring data sources CREATE FINAL PR

Working agreement to delete at little as possible, and just c+p to new classes Need to document for each other if and when we change any ported code.

Sprint-Ready Checklist

• [x] Acceptance criteria defined
• [x] Acceptance criteria is verifiable / testable
• [x] External / 3rd Party dependencies identified
• [x] Engineering team understands acceptance criteria
• [x] Is the user story small enough to be implemented in a short amount of time, but large enough to provide value?

[esgraham]

PR: https://github.com/Green-Software-Foundation/carbon-aware-sdk/pull/187

[esgraham]

Merged