Celes Renata
87 lines
2.7 KiB
Python
87 lines
2.7 KiB
Python
"""Base adapter interface for all external API integrations.
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All ingestion adapters follow the same contract:
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1. Fetch external payloads for a given ticker/source config.
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2. Return a structured result with raw bytes, parsed items, and metadata.
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3. The ingestion worker handles MinIO upload, PostgreSQL metadata, and downstream job emission.
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Requirements: 2.1, 2.2, 2.3, 2.4, 2.5, 3.1, 3.2, 3.3, 3.4
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"""
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from abc import ABC, abstractmethod
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from dataclasses import dataclass, field
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from datetime import datetime
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from typing import Any
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from services.shared.storage import _prefixed
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@dataclass
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class AdapterResult:
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"""Result of a single adapter fetch operation."""
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source_type: str
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ticker: str
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items: list[dict[str, Any]]
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raw_payload: bytes
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content_hash: str
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fetched_at: datetime
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error: str | None = None
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# HTTP metadata for observability
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http_status: int | None = None
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response_time_ms: float | None = None
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# Additional metadata the adapter wants to pass downstream
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metadata: dict[str, Any] = field(default_factory=dict)
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@property
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def ok(self) -> bool:
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"""True if the fetch succeeded without error."""
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return self.error is None and len(self.items) > 0
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@property
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def item_count(self) -> int:
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return len(self.items)
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class BaseAdapter(ABC):
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"""Interface for all ingestion adapters.
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Subclasses implement fetch() for their specific API and source_type()
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to identify the adapter class. The ingestion worker orchestrates
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persistence and downstream job emission.
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"""
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@abstractmethod
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async def fetch(self, ticker: str, config: dict[str, Any]) -> AdapterResult:
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"""Fetch data for a given ticker using source config.
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Args:
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ticker: The company ticker symbol.
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config: Source-specific configuration from the sources table.
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Returns:
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AdapterResult with raw payload, parsed items, and metadata.
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"""
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...
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@abstractmethod
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def source_type(self) -> str:
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"""Return the source type identifier for this adapter (e.g. 'market_api')."""
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...
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def bucket_name(self) -> str:
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"""Return the MinIO bucket name for raw artifact storage.
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Override in subclasses if the bucket differs from the default pattern.
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"""
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return _prefixed(f"stonks-raw-{self.source_type().replace('_api', '').replace('_', '-')}")
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def artifact_path(self, ticker: str, document_id: str, now: datetime) -> str:
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"""Build the MinIO object path for a raw artifact.
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Pattern: /{source_type}/{ticker}/{yyyy}/{mm}/{dd}/{document_id}/raw.json
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"""
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return (
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f"{self.source_type()}/{ticker}/"
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f"{now.strftime('%Y/%m/%d')}/{document_id}/raw.json"
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)
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