Impress NPM | npm.io

Enterprise application server for Node.js: secure, lightweight, interactive, and scalable.

Description

First Node.js server scaled with multithreading and extra thin workload isolation. Optimized for high-intensive data exchange, rapid development, and clean architecture. Provides everything you need out of the box for reliable and efficient backend, network communication with web and mobile clients, protocol-agnostic API, run-time type validation, real-time and in-memory data processing, and reliable stateful services.

Weak sides: not a good choice for content publishing including blogs and online stores, server-side rendering, serving static content and stateless services.

Strong sides: security and architecture for enterprise-level applications, long-lived connections over websocket to minimize overhead for cryptographic handshake, no third-party dependencies.

Quick start

See project template: metarhia/Example
Start server with node server.js
See documentation and specifications

API endpoint example: application/api/example.1/citiesByCountry.js

async ({ countryId }) => {
  const fields = ['cityId', 'name'];
  const where = { countryId };
  const data = await db.select('City', fields, where);
  return { result: 'success', data };
};

You can call it from client-side:

const res = await metacom.api.example.citiesByCountry({ countryId: 3 });

Metarhia and impress application server way

Applied code needs to be simple and secure, so we use sandboxing with v8 isolated contexts, worker threads and javascript closures;
Domain code should be separated from system code; so we use DDD, layered (onion) architecture, DI, SOLID and GRASP principles, contract-based approach;
Impress supports stateful applications with RPC and client-session sticky to servers; microservices, centralized or distributed architecture;
No I/O is faster even than async I/O, so we hold state in memory, share it among multiple threads and use lazy I/O for persistent storage;
We use just internal trusted dependencies, no third-party npm packages; total Metarhia technology stack size is less than 2mb.

Features

API auto-routing calls to endpoint for rapid API development (no need to add routes manually)
API concurrency: request execution timeout and execution queue with both timeout and size limitations
Schemas for API contract, data structures validation, and domain models
Application server supports different API styles: RPC over AJAX and over Websocket, REST, and web hooks
Multiple protocols support: HTTP, HTTPS, WS, WSS
Auto loader with start hooks, namespace generation for code and dependencies
Live reload of code through filesystem watch
Graceful shutdown with stop hooks
Minimal dependencies and reduced code size
Layered architecture: api, domain logic, data access layer, and system code layer (hidden)
Code sandboxing for enhanced security and execution context isolation
Code protection: reference pollution prevention, prototype pollution prevention
Multi-threading for CPU utilization and execution isolation
Load balancing for simple scaling with redirection to multiple ports
Caching: in-memory caching for APIs and static files
Configuration: environment-specific application settings
Database access layer compatible with PostgreSQL with SQL-injection protection
Persistent sessions with authentication, groups, and anonymous sessions
Buffered logging (lazy write) with log rotation (keep logs N days) and console interface
Testing: integrated node.js native test runner and table-test support
Inter-process communication and shared memory used for state management
File utilities: upload, download, support for partial content and streaming
Task Management: scheduled task execution at specific intervals or certain times

TODO list

Those features will be implemented in nearest future (3-6 months):

Server health monitoring
Database migrations
State synchronization mechanism with transactions and subscription
Multi-tenancy support

Requirements

Node.js v18.x or v20.x
Linux (tested on Fedora v36-38, Ubuntu v18-23, CentOS v8-9)
Postgresql v11-16
OpenSSL v3 or later (optional, for https & wss)
certbot (recommended but optional)

License & Contributors

metacom metaconfiguration metalog metaschema metautil metavm metawatch

@infinitebrahmanuniverse/nolb-imp @everything-registry/sub-chunk-1908 prezi impress-qr @types/impress

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