N2O: Distributed Application Server

N2O is a embeddable message protocol loop library for WebSocket, HTTP, MQTT and TCP servers. It provides basic features, such as: process management; virtual nodes ring for request processing; session, encoding, mq, cache and log services. It also includes poor man's bridges to server's endpoints.

Features

Purpose: High performance protocol relay
Endpoints: WebSockets, MQTT, TCP
Codebase: 1K LOC (Erlang), 500 LOC (JavaScript)
Buildtools: REBAR, REBAR3, MAD
Templates: DTL, NITRO
Databases [KVS, KVX]: FS, MNESIA, ROCKSDB, RIAK, REDIS
Business Processes: BPE (BPMN 2.0), SCM, ERP, CRM
Instant Messaging: ROSTER
HTTP API: REST (proplist/JSON)
Active Reloading: Linux, Windows, Mac
Business Forms: FORMS (HTML/CSS)
Hosts: COWBOY, EMQ, MOCHIWEB
Samples: REVIEW (1), SAMPLE (2)

Idea

N2O was created to bring clarity and sanity to software development. The distribution model is per file basis with ISC license.

Kernel

The core modules provide OTP start and N2O entry point.

n2o — N2O OTP Supervisor and Application
n2o_pi — N2O Processes
n2o_proto — N2O Loop

MQTT

MQTT version is implemented as RPC over MQ pattern. N2O service worker started as ring of virtual nodes each runs N2O loop.

n2o_vnode — N2O Virtual Node
n2o_auth — N2O Auth
n2o_ring — N2O Ring

$ mad app mqtt review
$ cd review
$ mad dep com pla rep
$ open http://127.0.0.1:8000

WebSocket

N2O Loop is directly connected and runned inside context of WebSocket handler. Usually in Erlang we use syn or gproc OTP message buses. As such buses are optional in MQTT setup we include bus drivers in WebSocket package.

n2o_stream — COWBOY and XHR bridge
n2o_heart — PING protocol
n2o_cowboy — COWBOY API
n2o_cowboy2 — COWBOY 2 API
n2o_gproc — GPROC bus backend
n2o_syn — SYN bus backend

$ mad app web sample
$ cd sample
$ mad dep com pla rep
$ open http://127.0.0.1:8001/app/index.htm

Protocols

N2O is shipped with 3 protocols, which could be omited or extended.

n2o_nitro — N2O Nitrogen web framework protocol
n2o_ftp — N2O File protocol
n2p_heart — N2O Heart protocol

Services

Formatters, Loggers, Sessions, etc. Optional.

n2o_bert — BERT encoder/decoder
n2o_json — JSON encoder/decoder
n2o_secret — AES/CBC-128 encoder/decoder
n2o_session — ETS session backend
n2o_io — IO loger backend

JavaScript

bert.js — BERT encoder/decoder
utf8.js — UTF8 encoder/decoder
ieee754.js — IEEE754 encoder/decoder
heart.js — HEART protocol
nitro.js — NITRO protocol
ftp.js — FTP protocol
n2o.js — N2O protocol looper
mq.js — MQTT client

Literature

N2O Book PDF

phpan/n2o