Light Rule

light-rule is the Rust rule engine for evaluating rule definitions and executing registered actions.

It is designed to align with the rule.yaml specification while remaining runtime-neutral. Java services can use yaml-rule; Rust services use this crate.

Main Types

• RuleEngine: evaluates rule conditions and determines action execution.
• MultiThreadRuleExecutor: executes rules with runtime state.
• RuntimeState: input/output state passed through rule evaluation.
• ActionRegistry: registry for action plugins.
• RuleActionPlugin: trait implemented by Rust action handlers.
• Rule, RuleCondition, RuleAction, RuleConfig, EndpointConfig: rule model types.

Action Model

Rules reference actions by actionRef. In Rust, actionRef resolves to a registered RuleActionPlugin; it is not a Java class name. This keeps the rule format portable across Java and Rust executors.

Usage

#![allow(unused)]
fn main() {
use light_rule::{ActionRegistry, RuleEngine};

let registry = ActionRegistry::default();
let engine = RuleEngine::new(registry);
}

Related Design

See Light-Rule for the rule format and its relationship to workflow assertions and portal rule management.