Webhook Manager

A centralized webhook system that allows services to emit events and clients to subscribe URLs to those events, automatically delivering payloads when events occur.

How It Works

Client Side (Consumers)

Clients register:

• A URL endpoint
• One or more events they want to receive

When a subscribed event occurs, the Webhook Manager sends the corresponding payload to the registered URL.

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Server Side (Event Producers)

Services register themselves with the Webhook Manager by providing:

• Their service URL
• The event name(s) they can emit

When an event occurs, the service notifies the Webhook Manager with the event data.

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Manager Responsibilities

• Maintain a mapping between events and subscribed client URLs
• Receive event notifications from producer services
• Dispatch payloads to all client URLs subscribed to the triggered event

Diagram

Tech Stack

• Client(User): SpringBoot, Java 21
• Server(Library): SpringBoot, Java 25, RestClient
• Webhook-Manager: SpringBoot, Java 21, RestClient
• Database: OracleDB, PostgreSQL
• Containerization: Docker, Docker Compose

Use Cases

• Notify clients when a new event occurs (e.g., user registration, order creation, system alert)
• Deliver payloads to multiple subscribed endpoints automatically
• Enable services to broadcast events without knowing the consumers
• Track and monitor event deliveries and failures for auditing purposes
• Can be extended to any domain where event-driven notifications are required

Set-up

git clone https://github.com/Gabriel-Gerhardt/Webhook-Manager.git
cd Webhook-Manager
docker-compose up

Access:

User: http://localhost:8100
Library: http://localhost:8080
Manager: http://localhost:9000

Contact

LinkedIn Gmail GitHub