EXO: Exosculat Exoskeleton

EXO (EXOSCULAT, Latin for "account") is an automated system for service accounting, rating, and billing. EXO is a universal account manager (customer accounts) that contains a history of rated transactions. Accounts are controlled by BPMN processes whose activities are defined by Erlang functions. EXO, as an example of ERP.UNO, can be used as a prototype for building billing systems, banks, and other accounting systems.

Getting Started

BPE (Business Process Engine) defines the infrastructure for orchestrating business processes according to the BPMN standard and declarative rule-based systems. BPE transactionally stores all steps of business processes in KVS, a modern RocksDB-based database system.

$ sudo apt install erlang elixir build-essential cmake

$ git clone https://github.com/erpuno/exo
$ cd exo
$ mix deps.get
$ iex -S mix
> EXO.boot

In parallel, open:

$ open http://localhost:8004/app/login.htm

This is an educational example of a preparatory course for interns, used to acquire skills in programming systems using the N2O.DEV libraries.

Project Structure

Login Page
Admin: BPE, FORM, KVS, N2O, MNESIA
Back-office: Reports, Tariffs, Roles
Consumer Panel: Profile, Consumption, Services

Static HTML Containers for Consumer

profile.htm Consumer account
consume.htm Service consumption
service.htm Service settings and tariffs

Static HTML Containers for Back-Office

reports.htm Reports
tariffs.htm Tariff models
domains.htm Role model

Static HTML Containers for Admin

login.htm Login page
bpe.htm All processes page
form.htm All forms page
process.htm Process history page
kvs.htm All data chains page
n2o.htm N2O service utility tables page
mnesia.htm MNESIA database tables page

Core Modules

application.ex Main Erlang/OTP application module
schema.ex Data schema and its configuration
routes.ex Web server HTML route configuration
boot.ex Initial seed of test data

Form Editors

phone_form.ex Authentication form
process_form.ex Process creation form
process_row.ex Table row form for process display
hist_row.ex Table row form for process step display

Page Controllers

adm_act.ex Process history page controller
adm_bpe.ex BPE processes list page controller
adm_form.ex FORM system forms page controller
adm_kvs.ex KVS data page controller
adm_n2o.ex N2O tables page controller
adm_mnesia.ex MNESIA data page controller
exo_login.ex Authentication page controller
exo_tariffs.ex Tariff models configuration page controller
exo_domains.ex System users administration page controller
exo_service.ex Consumer service subscription page controller

Authentication

The authentication and authorization page, along with system sessions, is an important part of every ERP system. This example provides a PLAIN password HTML form with "1" and "3" working passwords for admin and consumer respectively.

Processes

A page listing BPE processes of the ERP system and a form to create them.

Forms

A page listing all forms of the ERP system.

Transactions

A page showing the history of BPE business process steps.

Educational Materials

Contributors

Maxim Sokhatsky