perf(api): stop rebuilding proxy catalogues, vaults and cdms per request

Cache proxy provider catalogues (10 min), reuse vaults and CDMs across one batch licence call, and cache the health update check, /api/services entries and parsed service config.yaml.

tests/core/test_proxy_catalogue_cache.py

@@ -0,0 +1,37 @@
+"""The proxy provider catalogue cache."""
+
+from __future__ import annotations
+
+import pytest
+
+from unshackle.core.proxies import proxy
+from unshackle.core.proxies.proxy import cached_catalogue
+
+
+def test_catalogue_is_fetched_once_until_it_expires(monkeypatch: pytest.MonkeyPatch) -> None:
+    calls: list[int] = []
+
+    @cached_catalogue
+    def fetch() -> list[dict]:
+        calls.append(1)
+        return [{"country": "CA"}]
+
+    assert fetch() == fetch() == [{"country": "CA"}]
+    assert len(calls) == 1
+
+    monkeypatch.setattr(proxy, "CATALOGUE_TTL", 0.0)
+    fetch()
+    assert len(calls) == 2
+
+
+def test_empty_catalogue_is_not_kept() -> None:
+    calls: list[int] = []
+
+    @cached_catalogue
+    def fetch() -> list[dict]:
+        calls.append(1)
+        return []
+
+    fetch()
+    fetch()
+    assert len(calls) == 2

tests/core/test_vault_push_retry.py

@@ -66,3 +66,20 @@ def test_server_pushes_again_after_one_vault_failed(monkeypatch: pytest.MonkeyPa
     handlers.cache_to_vaults({KID.hex: KEY}, "SVC")
     handlers.cache_to_vaults({KID.hex: KEY}, "SVC")
     assert len(pushes) == 2
+
+
+def test_one_licence_request_builds_the_server_vaults_once(monkeypatch: pytest.MonkeyPatch) -> None:
+    builds: list = []
+    pushes: list = []
+
+    def build(name: str) -> Any:
+        builds.append(name)
+        return fake_server_vaults(pushes, [FakeVault(False)])
+
+    monkeypatch.setattr(handlers, "load_server_vaults", build)
+    monkeypatch.setattr(handlers, "CACHED_PAIRS", set())
+    shared: dict = {}
+    handlers.cache_to_vaults({KID.hex: KEY}, "SVC", shared=shared)
+    handlers.cache_to_vaults({KID.hex: KEY}, "SVC", shared=shared)
+    assert len(builds) == 1
+    assert len(pushes) == 2