Carnival-Micronaut

Carnival is a graph framework that allows for a large variety of ETL and analysis tasks related to relational data and property graphs. For this demonstration project, we will show how to use Carnival to harmonize relational data from various sources into a Carnival property graph, and present some of the ways the Carnival graph can be manipulated and analyzed. We use the the Carnival and Micronaut frameworks to create a JVM application that harmonizes relational clinical data from several sources into a Neo4J graph database, and presents a restful API to access and manipulate the data.

This demonstration been set up as a Docker multi-container project, with a container that holds the Carnival/Micronaut server applications and other containers that have databases with test data.

• Instructions on running the entire project are found below.
• A developer walkthrough of Carnival application can be found here: Developer Walkthrough

Running the Project

Quickstart

To just run the demo, do the following:

Install git
Install Docker Desktop
git clone https://github.com/carnival-data/carnival-demo-biomedical.git
cd carnival-demo-biomedical
docker compose build
docker compose up

Open a browser to check API endpoints:
http://localhost:5858
http://localhost:5858/case_patients
http://localhost:5858/control_patients

ctrl+c to stop

Detailed Setup

Prerequisites: Docker and git

On Windows and Mac, install Docker Desktop.

Note that as non-profit institutions, we can use the free "Personal" license.

Docker Licensing FAQ I am a researcher at a university (or another not-for-profit institution); do I or my research assistants need to purchase a Pro, Team, or Business subscription to use Docker Desktop?

No. You and your assistants may use Docker Desktop for free with a Docker Personal subscription.

1. Clone Carnival Micronaut

git clone https://github.com/carnival-data/carnival-demo-biomedical.git
cd carnival-demo-biomedical

2. Build and run the app

docker compose build
docker compose up

After a few minutes, there should be a server running at http://localhost:5858.

API endpoints will serve JSON responses containing the case and control cohorts (API Documentation):

http://localhost:5858/case_patients
http://localhost:5858/control_patients

Set up instructions for running the app with less Docker

Prerequisite: JDK 11, Docker, git

1. Clone Carnival Micronaut

git clone https://github.com/carnival-data/carnival-demo-biomedical.git
cd carnival-demo-biomedical

2. Start the database using Docker

docker compose build db
docker compose up db
# To run in the background as a daemon use:
# docker compose up -d db

3. Build and run the app

./gradlew run

After a few minutes, there should be a server running at http://localhost:5858.

Testing with Docker

Run tests with the following:

docker compose -f docker-compose-test.yml up

This will run the unit tests. The test results will be printed in the docker log. An exit code of 0 will be returned if the tests pass, otherwise a non-zero code will be returned.

Viewing source data in Postgres

Once docker has been started using docker compose up, the database can be browsed using database GUI tool like DBeaver with the credentials:

• Host: localhost
• Port: 5433, or as specified in .env
• Database: EHR
• Username: postgres
• Password: postgres