A forward-chaining rules engine for Clojure and ClojureScript with Java interoperability.
Clara is a forward-chaining rules engine implemented in Clojure and ClojureScript that allows developers to create expert systems using declarative rules. It solves the problem of managing complex business logic by separating rules from application code, enabling more maintainable and understandable systems. The engine automatically infers new facts from existing data through pattern matching and rule conditions.
Clojure and ClojureScript developers who need to implement complex business logic, expert systems, or decision-making workflows in their applications. It's also suitable for Java developers seeking a rules engine with Clojure interoperability.
Developers choose Clara for its seamless integration with Clojure ecosystems, clean declarative syntax, and Java interoperability. Its developer-centric design makes rule-based programming practical and accessible compared to more complex enterprise rules engines.
Forward-chaining rules in Clojure(Script)
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Uses idiomatic Clojure syntax for defining rules with defrule and mk-session, making it seamless for Clojure developers as shown in the README example.
Automatically infers new facts from data through pattern matching, simplifying complex conditional logic and enabling expert systems.
Can be used from Java applications, expanding its reach beyond Clojure ecosystems, which is highlighted in the GitHub description.
Separates business rules from application code using a clean API, improving maintainability for frequently changing logic.
Requires familiarity with Clojure's functional syntax and concepts, which can be a barrier for developers accustomed to imperative languages.
Adds inference layers and session management that may not be optimal for high-throughput applications, a common trade-off with rules engines.
Being niche in the Clojure community, it has fewer third-party tools or integrations compared to more established engines like Drools.
The README mentions needing npm and puppeteer for ClojureScript tests, indicating additional setup steps that can complicate initial use.