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Build Status Coverage Status Codacy Badge OpenMRS


This repository contains the CohortBuilder OpenMRS Open Web App.

The cohort-builder open web app module, is an OpenMRS tool used to create Ad-hoc reports. I.e build a cohort of patients based on the similarities between the patients.

For further documentation about OpenMRS Open Web Apps see the wiki page.

For further documentation about the cohort builder open web app module see the wiki page.


Production Build

You will need NodeJS 4+ installed to do this. See the install instructions here.

Once you have NodeJS installed, install the dependencies (first time only):

npm install

Build the distributable using Webpack as follows:

npm run build:prod

This will create a file called file in the dist directory, which can be uploaded to the OpenMRS Open Web Apps module.

Local Deploy

To deploy directly to your local Open Web Apps directory, run:

npm run build:deploy

This will build and deploy the app to the /home/sims01/openmrs/openmrs-server/owa directory. To change the deploy directory, edit the LOCAL_OWA_FOLDER entry in config.json. If this file does not exists, create one in the root directory that looks like:

  "LOCAL_OWA_FOLDER": "/home/sims01/openmrs/openmrs-server/owa"

Live Reload

To use Browersync to watch your files and reload the page, inject CSS or synchronize user actions across browser instances, you will need the APP_ENTRY_POINT entry in your config.json file:

  "LOCAL_OWA_FOLDER": "/home/sims01/openmrs/openmrs-server/owa",
  "APP_ENTRY_POINT": "http://localhost:8080/openmrs/owa/cohortbuilder/index.html"

Run Browsersync as follows:

npm run watch


Install npm packages dependencies as follows:

npm install --save <package>

To use the installed package, import it as follows:

//import and assign to variable
import variableName from 'package';

To contain package in vendor bundle, remember to add it to vendor entry point array, eg.:

entry: {
  app : `${__dirname}/app/js/owa.js`,
  css: `${__dirname}/app/css/owa.css`,
  vendor : [
    ...//other packages in vendor bundle

Any files that you add manually must be added in the app directory.


HTTP access control (CORS)

You may experience problems due to the Access-Control-Allow-Origin header not being set by OpenMRS. To fix this you'll need to enable Cross-Origin Resource Sharing in Tomcat.

See instructions here for Tomcat 7 and here for Tomcat 6.

Adding the Cohort Builder to the Reference Application

When on Reference Application Menu, enter System Administration -> Manage Apps -> Add App Definition and input following text inside:

    "description": "A modern refresh of the OpenMRS Cohort Builder tool",
    "order": 0,
    "extensions": [
            "id": "demoapp.homepageLink",
            "extensionPointId": "org.openmrs.referenceapplication.homepageLink",
            "type": "link",
            "label": "Cohort Builder",
            "url": "owa/cohortbuilder/index.html",
            "icon": "icon-list-alt",

Save changes, now cohort builder OWA is visible at the homepage

For further documentation about adding the cohort builder link to the reference application the wiki page.


In order to release, set a new version in package.json, bintray.json and app/manifest.webapp. Once you commit and push changes to github, go to and create a new release named after the version you want to release. Travis CI should pick up a newly created tag and deploy the release to Bintray at


If you want help fix existing issues or you found a bug and want to tell us please go to the Cohort Builder issues page.


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MPL 2.0 w/ HD © OpenMRS Inc.