OTel for Programmers

This is a demonstration project used with our "OTel for Programmers" presentation.

Overview

A simple Go payment service that demonstrates how to implement OpenTelemetry instrumentation for observability. The service provides basic payment processing capabilities through a REST API.

Features

• Payment creation and retrieval
• RESTful API endpoints
• In-memory storage (for demo purposes)
• Ready for OpenTelemetry instrumentation

API Endpoints

• GET /api/payment - Retrieve all payments
• POST /api/payment - Create a new payment

Payment Structure

{
  "id": "pay_1234567890",
  "amount": 100.50,
  "status": "pending",
  "date": "2025-07-03T10:30:00Z"
}

Running the Service

go run main.go

The service will start on port 8080.

Testing the API

Create a payment:

curl -X POST http://localhost:8080/api/payment \
  -H "Content-Type: application/json" \
  -d '{"amount": 100.50}'

Get all payments:

curl http://localhost:8080/api/payment

About the Presentation

This project serves as the foundation for demonstrating OpenTelemetry concepts including:

• Distributed tracing
• Metrics collection
• Observability best practices
• Integration with monitoring systems