refactor demos (#398)

demos/samples_python/weather_forecast/main.py

@@ -0,0 +1,97 @@
+import json
+import os
+import random
+from fastapi import FastAPI, Response
+from datetime import datetime, date, timedelta, timezone
+import logging
+from pydantic import BaseModel
+from opentelemetry import trace
+from opentelemetry.sdk.trace import TracerProvider
+from opentelemetry.instrumentation.fastapi import FastAPIInstrumentor
+from opentelemetry.exporter.otlp.proto.grpc.trace_exporter import OTLPSpanExporter
+from opentelemetry.sdk.trace.export import BatchSpanProcessor
+from opentelemetry.sdk.resources import Resource
+
+
+resource = Resource.create(
+    {
+        "service.name": "weather-forecast-service",
+    }
+)
+
+# Initialize the tracer provider
+trace.set_tracer_provider(TracerProvider(resource=resource))
+tracer = trace.get_tracer(__name__)
+
+logger = logging.getLogger("uvicorn.error")
+logger.setLevel(logging.INFO)
+
+app = FastAPI()
+FastAPIInstrumentor().instrument_app(app)
+
+# Configure the OTLP exporter (Jaeger, Zipkin, etc.)
+otlp_exporter = OTLPSpanExporter(
+    endpoint=os.getenv("OLTP_HOST", "http://localhost:4317")
+)
+trace.get_tracer_provider().add_span_processor(BatchSpanProcessor(otlp_exporter))
+
+
+@app.get("/healthz")
+async def healthz():
+    return {"status": "ok"}
+
+
+class WeatherRequest(BaseModel):
+    location: str
+    days: int = 7
+    units: str = "Farenheit"
+
+
+@app.post("/weather")
+async def weather(req: WeatherRequest, res: Response):
+    weather_forecast = {
+        "location": req.location,
+        "temperature": [],
+        "units": req.units,
+    }
+    for i in range(req.days):
+        min_temp = random.randrange(50, 90)
+        max_temp = random.randrange(min_temp + 5, min_temp + 20)
+        if req.units.lower() == "celsius" or req.units.lower() == "c":
+            min_temp = (min_temp - 32) * 5.0 / 9.0
+            max_temp = (max_temp - 32) * 5.0 / 9.0
+        weather_forecast["temperature"].append(
+            {
+                "date": str(date.today() + timedelta(days=i)),
+                "temperature": {"min": min_temp, "max": max_temp},
+                "units": req.units,
+                "query_time": str(datetime.now(timezone.utc)),
+            }
+        )
+
+    return weather_forecast
+
+
+class DefaultTargetRequest(BaseModel):
+    messages: list
+
+
+@app.post("/default_target")
+async def default_target(req: DefaultTargetRequest, res: Response):
+    logger.info(f"Received messages: {req.messages}")
+    resp = {
+        "choices": [
+            {
+                "message": {
+                    "role": "assistant",
+                    "content": "I can help you with weather forecast",
+                },
+                "finish_reason": "completed",
+                "index": 0,
+            }
+        ],
+        "model": "api_server",
+        "usage": {"completion_tokens": 0},
+    }
+    logger.info(f"sending response: {json.dumps(resp)}")
+    return resp