188 lines
8.4 KiB
Python
188 lines
8.4 KiB
Python
from __future__ import annotations
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from qdrant_client import QdrantClient
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from adapters.embedding import BedrockCohereQueryEmbedder
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from adapters.postgres import PostgresConversationStore, PostgresTraceRepository
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from adapters.qdrant import QdrantParentStore, QdrantRetriever
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from config import Settings
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from rag.agent import RagAgent
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from rag.answer import GroundedAnswerService
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from rag.artifacts import load_aliases
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from rag.manifest import MANIFEST_POINT_ID, check_manifest, manifest_collection
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from rag.metrics import NullMetrics
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from rag.routing import CatalogDrugResolver, QueryRoutingService
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from rag.sections import SectionResolver
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from rag.service import EvidencePolicy, RetrievalService
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from rag.understanding import LlmQueryUnderstander
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# How many aliases to show per candidate drug (F-04 bounds *which* drugs are
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# shown at all, per turn; this bounds how many names each shown one gets).
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_CATALOG_ALIASES_PER_DRUG = 3
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def _catalog_names(aliases: dict[str, set[str]]) -> dict[str, str]:
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"""The name(s) shown to the LLM for each drug_id.
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Found live 2026-08-06: picking the first 3 aliases *alphabetically* could
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drop the drug's own canonical/INN name entirely — paracetamol has 191
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aliases (mostly trade names), and the alphabetically-first 3 were
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"0Frezefev, ABAB, Ace kid 80", none recognizable. Mid-conversation, once
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the current turn no longer restates the drug name in raw text, the model
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has to re-derive it from history + this catalog line alone — with no
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recognizable name shown, it read the earlier "paracetamol" mention as an
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unknown drug and answered "not found in the formulary" for a drug that
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plainly is. Fixed by always showing the drug_id's own name form first
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(guaranteed present, always recognizable — it's the exact string a user
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who names a drug is most likely to type), then filling remaining slots
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with short, ALL-CAPS-preferring aliases (the book's own heading
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convention, so usually the generic name, not a dosage-suffixed brand
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like "Ace kid 80").
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"""
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result: dict[str, str] = {}
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for drug_id, names in aliases.items():
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canonical = drug_id.replace("_", " ")
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ranked = sorted(names, key=lambda n: (not n.isupper(), len(n), n))
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extra = [n for n in ranked if n.strip().casefold() != canonical]
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shown = [canonical, *extra][:_CATALOG_ALIASES_PER_DRUG]
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result[drug_id] = ", ".join(dict.fromkeys(shown))
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return result
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def _build_metrics(settings: Settings):
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"""A Prometheus exporter, or None when the package or the flag is absent.
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Missing `prometheus_client` degrades to no metrics rather than to a service
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that will not start: observability is not a precondition for answering.
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"""
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if not settings.metrics_enabled:
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return None
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try:
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from adapters.prometheus import PrometheusMetrics
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return PrometheusMetrics()
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except ImportError:
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return None
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def _build_generator(settings: Settings):
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if settings.answer_provider == "disabled":
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return None
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if settings.answer_provider == "stub":
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from adapters.bedrock_claude import StubAnswerGenerator
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return StubAnswerGenerator(
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"Câu trả lời mẫu, không gọi nhà cung cấp nào. [1]"
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)
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if settings.answer_provider == "bedrock-claude":
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from adapters.bedrock_claude import BedrockClaudeAnswerGenerator
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return BedrockClaudeAnswerGenerator(
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region=settings.aws_region, model_id=settings.answer_model_id
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)
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if settings.answer_provider == "bedrock-converse":
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from adapters.bedrock_converse import BedrockConverseAnswerGenerator
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return BedrockConverseAnswerGenerator(
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region=settings.aws_region, model_id=settings.answer_model_id
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)
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raise ValueError(
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"Unknown ANSWER_PROVIDER. Supported values: disabled (default), "
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"stub (local, no cloud), bedrock-claude, bedrock-converse"
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)
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def _build_reranker(settings: Settings):
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"""A Cohere reranker, or None when disabled. Only used on the similarity /
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overview fallback; the section route never reranks."""
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if not settings.rerank_enabled:
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return None
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from adapters.bedrock_converse import BedrockCohereReranker
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return BedrockCohereReranker(region=settings.aws_region)
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def _verify_corpus_manifest(client, collection: str, embedder, settings: Settings) -> None:
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"""Read the sidecar manifest point the ingestion loader writes
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(`ingestion/ingestion/load/manifest.py`) and refuse to start on a
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mismatch. Raises `rag.manifest.ManifestMismatch` (a `RuntimeError`),
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which crashes startup — a deliberate refusal, not an oversight: this
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runs at process start (`main.py` calls `build_runtime` at import time),
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so a mismatch here means the process never comes up and never serves a
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query from a corpus it wasn't verified against.
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"""
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sidecar = manifest_collection(collection)
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payload = None
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# This qdrant-client version has no `collection_exists`, and
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# `get_collection` (singular) is a known parse-bug risk in this
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# environment — list collections and check membership instead.
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existing = {col.name for col in client.get_collections().collections}
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if sidecar in existing:
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points = client.retrieve(sidecar, [MANIFEST_POINT_ID], with_payload=True)
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if points:
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payload = points[0].payload
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check_manifest(payload, collection, embedder.model_id, settings.embedding_dimensions)
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def build_runtime(settings: Settings):
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metrics = _build_metrics(settings)
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if settings.embedding_provider == "disabled":
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return None, None, PostgresTraceRepository(settings.postgres_dsn), metrics
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if settings.embedding_provider != "cohere-v4":
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raise ValueError(
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"No production query embedder is configured. Supported values: "
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"EMBEDDING_PROVIDER=cohere-v4 (semantic query embedding) or "
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"disabled. The old local/section-only stubs were removed."
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)
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client = QdrantClient(
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url=settings.qdrant_url,
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api_key=settings.qdrant_api_key,
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timeout=30,
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)
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embedder = BedrockCohereQueryEmbedder(
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settings.embedding_dimensions, region=settings.aws_region
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)
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# F-05: a collection built with one model and queried with another
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# returns hits and raises nothing — the results are just meaningless,
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# with no error to notice. Refuse to start rather than search with
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# vectors this collection was not built from.
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_verify_corpus_manifest(client, settings.qdrant_collection, embedder, settings)
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section_resolver = SectionResolver()
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aliases = load_aliases(settings.entities_path)
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# Kept only for deterministic input-time autocomplete (`RagAgent.complete`)
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# and to satisfy `GroundedAnswerService`'s constructor — its fuzzy
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# `.resolve()` is no longer on the live query path; `RagAgent` resolves
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# drug identity through `LlmQueryUnderstander` against the same catalog.
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resolver = CatalogDrugResolver(aliases)
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retrieval = RetrievalService(
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QdrantRetriever(client, settings.qdrant_collection, embedder),
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QdrantParentStore(client, settings.qdrant_collection),
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EvidencePolicy(minimum_score=settings.evidence_minimum_score),
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section_resolver=section_resolver,
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reranker=_build_reranker(settings),
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)
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routing = QueryRoutingService(retrieval, resolver)
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generator = _build_generator(settings)
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answers = GroundedAnswerService(
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routing, generator=generator, metrics=metrics or NullMetrics()
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)
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trace_writer = PostgresTraceRepository(settings.postgres_dsn)
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if generator is None:
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# The new front end understands a turn with the same LLM call that
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# answers it — with no generator configured there is no query
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# understanding either, so there is no conversational/agent
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# capability to offer. Answer-only (retrieval-verified, no
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# generation) still works through `answers` directly.
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return answers, None, trace_writer, metrics
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agent = RagAgent(
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understander=LlmQueryUnderstander(generator, _catalog_names(aliases), resolver),
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retrieval=retrieval,
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answers=answers,
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autocomplete=resolver,
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max_wall_clock_ms=settings.max_wall_clock_ms,
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max_llm_calls_per_turn=settings.max_llm_calls_per_turn,
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store=PostgresConversationStore(settings.postgres_dsn),
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)
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return answers, agent, trace_writer, metrics
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