webgme

WebGME - Web-based Generic Modeling Environment

Note that this repository contains the full webgme app including a highly extendable graphical user interface and is the typical dependency a webgme app will depend on. To use the webgme framework without a packaged GUI - check out webgme-engine.

Create your own Domain Specific Modeling Languages (DSML) right in the browser. Specify modeling concepts, their relationships, attributes, and aspects by drawing a UML class diagram-based metamodel and WebGME automatically configures itself to support the DSML.

WebGME promotes collaboration where each change is translated into a micro-commit broadcast to all connected users. A lightweight branching scheme is transparently supported by the infrastructure. Code generators and externals tools can work on consistent snapshots (specific commits) while users can continue editing the models.

WebGME provides a variety of extension points for you to customize your application. See below for a list and explainations. All these can be neatly generated, shared and imported using a command line interface.

Getting started

Dependencies

Server

• NodeJS (version >= 14, CI tests are performed on versions 16.x, 18.x and LTS is recommended).
• MongoDB (2.6 <= version).
• Git (must be available in PATH).
• Redis Note that this is only needed if you intend on running multiple webgme nodes behind a reverse proxy.

Browser

We aim to support all the major modern browsers. However we recommend using Chrome for two reasons: manual testing is mostly done using chrome and all performance profiling is done against the V8 JavaScript Engine.

Tutorials

• Step by step tutorial - Explains meta-modeling in webgme and builds up a small application for Electrical Circuits.
• Tutorial from seminar 2015 - Shows development techniques in webgme and builds up a Finite State Machine domain. This tutorial requires familiarity with meta-modeling.

Using WebGME

You can always try out webgme at our public deployment at webgme.org. After a certain point you probably want to host your own server with custom running code and visualization. At this point follow the instructions at 1.

1. webgme-cli. This is the preferred way of using webgme as it allows you to:

• Automatically generate boilerplate code for extensions (w/o manually configuring paths etc.).
• Reuse components from other users.
• Publish and share your work with others.
• Updating to newer webgme releases only requires a npm install webgme and won't cause any conflicts.
• Note that if cloning an existing repository constructed with webgme-cli, it is only necessary to install webgme-cli if you intend to create/import new components.

2. For webgme developers, clone this repo.

• install packages with npm npm install
• launch mongod locally, e.g.

docker run --name my-mongo -d -p 27017:27017 mongo:4.4

• start the server npm start

After the webgme server is up and there are no error messages in the console. Open a valid webgme address in the browser. The default is http://127.0.0.1:8888/, you should see all valid addresses in the console where you started webgme. To view the available documentation visit <host>/api.

Command line interface

The webgme-engine provides a range of bin scripts, see here for list of all.

Extensions

• Plugins - Model interpretation for e.g. code generation.
• Executor - Job execution framework over multiple worker nodes.
• Rest Routers - Add custom REST API routes with access to gme-auth and storage APIs.
• Constraints - Add custom constraints based on meta-types.
• AddOns - Continuous model interpretation for e.g. constraint evaluation.
• Webhooks - External event emitting based on changes in storage/models.
• Layouts - Configure the layout of the generic UI.
• Visualizers - Add complete visualizers to the generic UI.
• Decorators - Add custom decoration to the nodes in the model editor.

See gme-config for available configuration parameters.

Change log

See CHANGELOG

Contributing

See CONTRIBUTING

License

See the LICENSE file.