MApp-KG (Old Knowledge Graph Repository)

MApp-KG is a Java-based Spring Boot service that utilizes the RDF4J framework to interact with a GraphDB repository instance.

📌 Description

This component provides a REST API for querying, updating, and extracting knowledge from a graph database.

🛠️ Used Technologies

Component	Description	Version
Spring Boot	Java framework for creating REST APIs	2.7.1
RDF4J	Java library for manipulating RDF graphs	3.0.0
GraphDB	Enterprise-ready Semantic Graph Database, compliant with W3C standards	10.1.0

⚙️ Configuration

To configure the GraphDB connection, set the appropriate values for:

• db.url
• db.username
• db.password

These values should be updated in the respective properties files:

• Docker deployment: src/main/resources/application-gessi.properties
• Localhost deployment: src/main/resources/application-localhost.properties

To set a custom RML file path, configure rml.path accordingly.

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🚀 How to Build

To build the project, run:

mvn clean install package

▶️ How to Run

Run using Java

java -jar target/repo-0.0.1-SNAPSHOT.jar

Deploy using Docker

Step 1: Build Docker Image

docker build -t mapp-kg .

Step 2: Run Docker Container

docker run -d -p 3003:3003 --name MApp-KG \
  -e DB_USERNAME=my_db_user \
  -e DB_PASSWORD=my_db_password \
  -e REPO_NAME=my_repo_name \
  mapp-kg

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🌍 How to Deploy (New Method)

Step 1: Pull Image from Repository

docker pull mtiessler/kg_repository:latest

Step 2: Build Image (if needed)

docker build -t mtiessler/kg_repository:latest .

Step 3: Create .env File

Create a file named kg_repository.env in the same directory where you execute the Docker commands. This file should contain:

DB_USERNAME=username
DB_PASSWORD=password

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🔗 API Documentation

The API of MApp-KG is available in the Postman Collection:
Postman Collection - MApp-KG

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