Muonroi.RuleEngine.DecisionTable 2.0.1

Muonroi.RuleEngine.DecisionTable

Decision table execution engine supporting DMN-style rule execution with various hit policies and FEEL expressions.

Installation

dotnet add package Muonroi.RuleEngine.DecisionTable

Overview

Provides support for representing and executing business rules as Decision Tables within the Muonroi ecosystem. It uses IDecisionTableExecutor and DecisionTableExecutor to evaluate a DecisionTable against input facts, applying a HitPolicy (Unique, Any, First, All, Collect, RuleOrder) to return a DecisionTableExecutionResult.

Features

• Table Execution: DecisionTableExecutor evaluates input facts against decision tables and outputs matched rows.
• Hit Policies: Supports standard DMN hit policies through the HitPolicy enum.
• FEEL Expressions: Cells are evaluated using IFeelCellEvaluator, with implementations like FullFeelCellEvaluator and SimplifiedFeelCellEvaluator.
• Validation: Ensures correctness using DecisionTableValidator, OverlapDetector, MultiColumnOverlapDetector, and GapDetector.
• Storage Abstractions: Persist tables via IDecisionTableStore, with InMemoryDecisionTableStore and EfCoreDecisionTableStore.

Quick Start

// Evaluate a decision table
var executor = provider.GetRequiredService<IDecisionTableExecutor>();
var result = await executor.ExecuteAsync(decisionTable, inputFacts, cancellationToken);

Ecosystem Combinations

+ RuleEngine.Core → Decision Tables as Rules

Decision tables implement IRule<TContext> — the orchestrator evaluates them alongside compiled C# rules with the same FactBag pipeline.

+ Tenancy.Core → Per-Tenant Table Versions

Each tenant can have its own version of a decision table active simultaneously via RuleSetStatus and canary rollout.

+ RuleEngine.Runtime → Persisted, Hot-Reloadable Tables

Tables stored in Postgres or SQL Server. Update a row in the database — the change applies on the next evaluation cycle without restart.

+ FEEL (Muonroi.Rules) → Rich Cell Expressions

FullFeelCellEvaluator supports the complete FEEL expression language in table cells: date ranges, list membership, arithmetic comparisons.

Full Rule Engine Production Stack

builder.Services
    .AddDecisionTableExecution()
    .AddFullFeelEvaluator()
    .AddInMemoryDecisionTableStore();

Samples

• Quickstart.DecisionTable

License

Apache 2.0 — see LICENSE-APACHE.