Backend of the OpenMRS Module Repository 2.0
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Build Status OpenMRS Talk OpenMRS IRC OpenMRS Telegram OpenMRS Modulus Wiki

A repository of add-ons for the OpenMRS platform. This repository contains the backend of the OpenMRS Modules directory at


API Documentation: Browse the API Docs

Frontend UI Application: Modulus UI

Design and Discussion: Modulus on OpenMRS Talk

Dev Environment Setup Guide: How to install Modulus and Modulus UI (covers setting up a Modulus server, OpenMRS ID OAuth, and the Modulus UI frontend)

Modulus provides a data model and a REST API for representing OpenMRS modules. Modulus UI is developed separately, and provides the front-end web application that consumes this REST api.


To prepare a dev environment:

  1. Build requirements: MySQL, Java EE JDK 7. As of early 2016, only JDK 7 is supported. We'll need to update our version of Grails to move to JDK 8. You may experience problems running on a server with less than 2GB RAM.
  2. Install Grails 2.3.7. sdkman is the simplest way:

    $ sdk install grails 2.3.7
  3. Clone this repo and its submodules:

    $ git clone
    $ cd openmrs-contrib-modulus
    $ git submodule init
    $ git submodule update
  4. Create a MySQL database:

    $ mysql -u root -p -e "CREATE DATABASE modulus"
  5. Configure Modulus. Modulus looks for config files in ~/.grails/modulus-config.groovy, /opt/modulus/modulus-config.groovy, or in the classpath. It will also look for .properties files in the same locations. Custom config locations can be passed with -Dmodulus.config.location=CONFIG_PATH as a run argument. See example config file below.

  6. Run grails. The final command will start a dev server:

    $ grails clean
    $ grails refresh-dependencies
    $ grails run-app

NOTE: Modulus only provides the back-end and REST API of the OpenMRS Modules application. To get an actual web interface for Modulus, build and install Modulus UI.

Alternative Compile/Test Using Docker

This is slower to start up, but saves you from having to configure a Java 7 + Grails 2.3.7 environment.

$ # run this once (it will take a long time)
$ docker build -t "${your-dockerhub-user}/modulus-docker-builder" .
$ # run this each time you develop (it will take a long time to run, but you can execute multiple commands)
$ docker run -it -v `pwd`:/app:rw "${your-dockerhub-user}/modulus-docker-builder"

grails> clean
grails> refresh-dependencies
grails> test-app

This docker setup won't let you do run-app (because mysql isn't wired in); hopefully someone can improve this


To sign in to Modulus and Modulus-UI, you need an OAuth key with an OpenMRS ID server. You can set up a local ID server, or request a key from the server at

Once you have this key, add it to your modulus-config.groovy file via the oauth.providers.openmrsid object. See example below:

Example modulus-config.groovy:

import org.openmrs.modulus.oauth.OpenMrsIdApi

grails.serverURL = "http://localhost:8080"
modulus {
       uploadDestionation = "/tmp/uploads"
       openmrsid.hostname = ""

// Overrides the default configuration in grails-app/conf/DataSource.groovy
dataSource.url = "jdbc:mysql://localhost/modulus"
dataSource.username = "root"
dataSource.password = ""

// OpenMRS ID Provider. These keys correspond to keys issued by your OpenMRS ID server.
oauth.providers.openmrsid = [
        api: OpenMrsIdApi,
        secret: "YOUR_OAUTH_SECRET",
        successUri: "${grails.serverURL}/login/success",
        failureUri: "${grails.serverURL}/login/failure",
        callback: "${grails.serverURL}/oauth/openmrsid/callback",
        scope: "profile"

// Modulus UI Client. These keys must be known by a Modulus UI client to connect.
grails.plugin.springsecurity.oauthProvider.clients = [
                clientId: "modulus123",
                clientSecret: "modulus123",
                registeredRedirectUri: ["http://localhost:8083/auth-success.html"],
                additionalInformation: [
                        name: "Dev Modulus UI",
                        preApproved: true

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