This documentation provides insights into the various routes defined across the open-telemetry/opentelemetry-demo codebase. The codebase is primarily implemented in TypeScript, with additional components in different programming languages. Each section below highlights the routes defined in the respective languages, supported by code examples where applicable.

TypeScript Routes

The TypeScript implementation primarily revolves around the Express framework. Below is an example of the routes defined in this section of the codebase:

import express from 'express';

const app = express();
const router = express.Router();
// Define health check route
router.get('/health', (req, res) => {
res.status(200).json({ status: 'UP' });
});
// Define some other application routes
router.get('/products', (req, res) => {
// Logic to get products
});
router.post('/checkout', (req, res) => {
// Logic to process checkout
});
// Attach the router to the app
app.use('/api', router);
export default app;

In this snippet, the routes /health, /products, and /checkout are defined within an Express router, and the base URL for the routes is prefixed with /api.

Go Routes

In the Go implementation, the routes are defined using the standard http module. The relevant code snippet is as follows:

package main

import (
"net/http"
)
func main() {
http.HandleFunc("/health", healthHandler)
http.HandleFunc("/products", productsHandler)
http.HandleFunc("/checkout", checkoutHandler)
// More routes can be defined here
http.ListenAndServe(":8080", nil)
}
func healthHandler(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(http.StatusOK)
w.Write([]byte({"status":"UP"}))
}
func productsHandler(w http.ResponseWriter, r *http.Request) {
// Logic to get products
}
func checkoutHandler(w http.ResponseWriter, r *http.Request) {
// Logic to process checkout
}

In this snippet, the same three routes (/health, /products, and /checkout) are established using the http.HandleFunc method.

Java Routes

In the Java implementation using Spring Boot, routes can be defined utilizing the @RestController annotation:

import org.springframework.web.bind.annotation.*;

@RestController
@RequestMapping("/api")
public class ApiController {
@GetMapping("/health")
public String health() {
return "{"status":"UP"}";
}
@GetMapping("/products")
public List<Product> getProducts() {
// Logic to get products
}
@PostMapping("/checkout")
public ResponseEntity<?> checkout(@RequestBody CheckoutRequest request) {
// Logic to process checkout
}
}

Here, the /health, /products, and /checkout API routes are established with their respective HTTP methods.

Python Routes

Python routes using Flask are defined as follows:

from flask import Flask, jsonify, request

app = Flask(name)
@app.route('/health', methods=['GET'])
def health():
return jsonify({"status": "UP"}), 200
@app.route('/products', methods=['GET'])
def products():
Logic to get products
return jsonify(products_list)
@app.route('/checkout', methods=['POST'])
def checkout():
Logic to process checkout
return jsonify({"message": "Checkout processed!"}), 200

The /health, /products, and /checkout routes are created using Flask decorators on the respective functions.

Conclusion

The routes defined in the open-telemetry/opentelemetry-demo codebase are primarily focused on service health checks, product retrieval, and checkout processes. The examples above provide a detailed overview of the route implementations across TypeScript, Go, Java, and Python, showcasing the versatility in defining routes based on language and framework-specific conventions.

For more comprehensive insights, refer to the source files within the repository.