oracle-samples/clara-rules
Clara Rules
Clara Rules is a declarative logic programming library and business rules management system designed for Clojure and Java applications. It functions as a forward-chaining inference engine that evaluates business logic by matching data patterns against defined rules, allowing developers to derive new information and trigger automated actions based on the current state of a fact set.
The engine utilizes a directed acyclic graph for pattern matching, which enables efficient evaluation across complex rule sets. It incorporates a truth maintenance system that tracks dependencies between facts and conclusions, ensuring that derived data is automatically retracted when underlying information changes. To support complex reasoning, the system includes accumulator-based fact aggregation, which processes collections of data through functional reduction operators.
The framework provides interoperability with host-language data models, allowing standard Java beans or records to be mapped directly into the engine for processing. It also includes diagnostic tools that provide transparency into the evaluation process by generating explanations for why specific rules were activated.
