flask_opentelemetry_tracing_dice_roller_with_console_export.py

1# flask_example.py
2from flask import Flask, request
3from opentelemetry import trace
4
5# Acquire a tracer
6tracer = trace.get_tracer("diceroller.tracer")
7
8app = Flask(__name__)
9
10@app.route("/roll")
11def roll_dice():
12    return str(roll())
13
14def roll():
15    # This creates a new span that's the child of the current one
16    with tracer.start_as_current_span("roll") as rollspan:
17        from random import randint
18        res = randint(1, 6)
19        rollspan.set_attribute("roll.value", res)
20        return res
21
22if __name__ == "__main__":
23    app.run(port=8080)