Introduction

Developers want to pass parameters from outside the promotion evaluation process, to use them in their new condition evaluators and action executors without the need to override ruleset and promotion calculation rule (Recipe: How Can I Add a New Action Type?).

Overview

This functionality uses a CalculationContext object to store the parameters. The CalculationContext object gets passed through the promotion evaluation process. In a CalculationRule object a PromotionEvaluationObjects object is created and receives the custom parameters from the Context object. The PromotionEvaluationObjects is passed to objects of classes which implement the interface PromotionConditionEvaluator or PromotionActionExecutor where the custom parameters can be used.