Request tracing and visualization for FastAPI applications.
Project description
WatchTower
WatchTower is a project-aware FastAPI runtime observability tool that maps requests to user-defined classes and functions, helping developers understand request flow and inspect profiling data without framework noise.
Requirements
- Use
async defendpoints for best tracing accuracy - Sync endpoints (
def) may lead to incomplete or unstable traces
Example usage
from fastapi import FastAPI
from .api.routes import router
from watchtower import setup_watchtower
app = FastAPI(title="Complex Profiling Demo")
setup_watchtower(
app,
source_root="examples",
output_dir=".watchtower-complex_server",
enable_ui=True,
ui_dist_dir="frontend/watchtower-ui/dist",
)
app.include_router(router)
Example of Request Flow animation of a complex server
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