bpmn-server

Introduction

bpmn-server provides BPMN 2.0 Modeling, Execution and Persistence, as an open source Workflow Server for Node.js

This package is designed specifically for Node.js and developed entirely in TypeScript

A WebApp provides a UI from modeling and developing your workflow

Table of Contents

• Process modeller
• Execution
• Installation
• Demo
• Acknowledgments

Documentation

• Features
• Examples
• API

Process modeller

A web based modeler is included based on http://bpmn.io , models definitions are saved at your server

Process Execution

bpmn-server provides an bpmnEngine to execute your workflow definition supporting most of BPMN 2.0 elements

Process Server

provides an environment to presist execution Instances while running and communicate with your application.

Applications can monitor and communicate to Instances whether they are running or offline, allowing user interface to query and process Workflow steps

Data Queries

Since instances are saved in MongoDB you can easily query your instances (running or completed)

Sample Web App

Included is a sample web application (running Node.js and Express.js) to allow you to visualize your workflow

Installation

This package requires Node.js and an access to MongoDB () if you don't have MongoDB already installed you can create a free cloud account here

$ mkdir myBPMN

$ cd myBPMN

$ npm install bpmn-server

$ cp node_modules/bpmn-server/WebApp/. ./  -r

Windows: 
xcopy /e /i /s /y node_modules\bpmn-server\WebApp\*.* .

npm update

Edit configuration file to have MongoDB point to your server or free cloud account

node app

Demo

a full demo site is available @ http://bpmn.omniworkflow.com

Example

    const server = new BPMNServer(configuration, logger);

    let response = await server.engine.start('Buy Used Car');

    // let us get the items
    const items = response.items.filter(item => {
        return (item.status == 'wait');
    });

    items.forEach(item => {
        console.log(`  waiting for <${item.name}> -<${item.elementId}> id: <${item.id}> `);
    });

    console.log('Invoking Buy');

    response = await server.engine.invoke({ id: response.execution.id, "items.elementId": 'task_Buy' },
        { model: 'Thunderbird', needsRepairs: false, needsCleaning: false });

    console.log("Ready to drive");

    response = await server.engine.invoke({ id: response.execution.id, "items.elementId": 'task_Drive' });


    console.log(`that is it!, process is now complete status=<${response.execution.status}>`)

for more complete examples see Examples

Change Log

see CHANGELOG

Acknowledgments

The bpmn-server resides upon the excellent library bpmn-io/bpmn-moddle developed by bpmn.io

The bpmn-server is inspired by the library bpmn-engine