rhizome-node/docs/custom-resolvers/overview.md

Custom Resolvers

Overview

The CustomResolver system provides a flexible framework for resolving property conflicts in distributed systems. It enables you to define custom resolution strategies through plugins, complete with type-safe dependencies between resolvers.

Key Features

• Plugin-based Architecture: Extend functionality with custom resolvers
• Type-Safe Dependencies: Compile-time checking of plugin dependencies
• Built-in Resolvers: Common resolution strategies included
• Efficient Processing: Only processes changed deltas
• Deterministic Results: Same input always produces the same output

Core Concepts

1. Resolver Plugins: Implement resolution logic for properties
2. Dependency Management: Declare and manage dependencies between plugins
3. State Management: Maintain and update state based on incoming deltas
4. Resolution Pipeline: Process updates and resolve final values

Getting Started

import { CustomResolver } from '../src/views/resolvers/custom-resolvers';
import { LastWriteWinsPlugin } from '../src/views/resolvers/custom-resolvers/plugins';
import { Hyperview } from '../src/views/hyperview';

// Create a hyperview view
const hyperview = new Hyperview();

// Create a resolver with a last-write-wins strategy
const resolver = new CustomResolver(hyperview, {
  myProperty: new LastWriteWinsPlugin()
});

// Process updates through the hyperview view
// hyperview.applyDelta(delta);

// Get resolved values for specific entities
const result = resolver.resolve(['entity1', 'entity2']);

// Or get all resolved values
const allResults = resolver.resolveAll();

Next Steps

• Learn about Built-in Plugins
• Understand Type-Safe Dependencies
• Explore Creating Custom Plugins