rosemariejebbjtxbfp
a75318b811
Stage-0 caching from docs/scalability.md. The Go API now caches hot product-detail and search-result reads in Redis with a fail-open, epoch-versioned scheme; Python ingestion bumps the epoch after a write run to invalidate the cache globally in O(1). - api/internal/cache: fail-open Cache (GetJSON/SetJSON) namespaced by an epoch counter (og:cache:epoch); disabled when Redis is unconfigured. - store: ProductByID/ProductByGTIN (24h TTL) and SearchProducts (1h TTL) read-through the cache via WithCache. - ingestion: bump_cache_epoch() called after update_off/seed_off/ import_bypos/dedup commits when rows changed; best-effort, never fails a run. Adds redis dependency. Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
45 lines
1.2 KiB
Python
45 lines
1.2 KiB
Python
"""Tests for the best-effort API cache invalidation signal."""
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from __future__ import annotations
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import sys
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import opengoods.cache as cache
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def test_disabled_when_no_url(monkeypatch):
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monkeypatch.delenv("OPENGOODS_REDIS_URL", raising=False)
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assert cache.default_redis_url() is None
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assert cache.bump_cache_epoch() is False
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def test_bump_fails_open_when_unreachable(monkeypatch):
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# An unroutable URL must not raise; the run still succeeds.
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monkeypatch.setenv("OPENGOODS_REDIS_URL", "redis://127.0.0.1:1/0")
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assert cache.bump_cache_epoch() is False
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def test_bump_increments_epoch(monkeypatch):
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calls = {}
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class FakeClient:
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def incr(self, key):
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calls["key"] = key
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return 7
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def close(self):
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calls["closed"] = True
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class FakeRedis:
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@staticmethod
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def from_url(url, **kwargs):
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calls["url"] = url
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return FakeClient()
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monkeypatch.setitem(sys.modules, "redis", type("M", (), {"Redis": FakeRedis}))
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assert cache.bump_cache_epoch("redis://example:6379/0") is True
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assert calls["key"] == "og:cache:epoch"
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assert calls["url"] == "redis://example:6379/0"
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assert calls["closed"] is True
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