Tomas Kracmar
b0198012eb
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- Replace skip-based pagination with cursor-based pagination (timestamp|_id cursors) - Add Prometheus /metrics endpoint with request latency, fetch volume, and error counters - Implement incremental fetch watermarking per source (watermarks collection in MongoDB) - Add Graph change notification webhook endpoint (/api/webhooks/graph) - Add correlation ID middleware for distributed tracing (x-request-id header) - Update frontend to use cursor-based pagination with Prev/Next navigation - Update tests for cursor pagination, metrics, webhooks, and watermark mocking
17 lines
618 B
Python
17 lines
618 B
Python
import uuid
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import structlog
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from fastapi import Request, Response
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from starlette.middleware.base import BaseHTTPMiddleware, RequestResponseEndpoint
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class CorrelationIdMiddleware(BaseHTTPMiddleware):
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"""Inject or propagate a correlation ID for every request."""
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async def dispatch(self, request: Request, call_next: RequestResponseEndpoint) -> Response:
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cid = request.headers.get("x-request-id") or uuid.uuid4().hex
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structlog.contextvars.bind_contextvars(correlation_id=cid)
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response = await call_next(request)
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response.headers["x-request-id"] = cid
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return response
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