Reduce the ttl and scope for assets kind list cache entry + version bump. (dart-lang#9620)

Author: isoos

CHANGELOG.md

@@ -2,6 +2,7 @@ Important changes to data models, configuration, and migrations between each
 AppEngine version, listed here to ease deployment and troubleshooting.
 
 ## Next Release (replace with git tag when deployed)
+ * Bump runtimeVersion to `2026.09.27`.
 
 ## `20260924t135800-all`
  * Bump runtimeVersion to `2026.09.22`.

app/lib/frontend/handlers/package.dart

@@ -512,7 +512,8 @@ Future<PackagePageData> loadPackagePageData(
   ]);
 
   final selectedVersion = await selectedVersionFuture;
-  if (selectedVersion == null) {
+  final assets = await assetsFuture;
+  if (selectedVersion == null || assets == null) {
     throw NotFoundException.resource(
       'package "$packageName" version "$versionName"',
     );
@@ -522,7 +523,7 @@ Future<PackagePageData> loadPackagePageData(
     package: package,
     latestReleases: await latestReleasesFuture,
     version: selectedVersion,
-    assets: await assetsFuture,
+    assets: assets,
     asset: await assetFuture,
     scoreCard: await scoreCardFuture,
     isAdmin: await isAdminFuture,

app/lib/package/backend.dart

@@ -320,16 +320,15 @@ class PackageBackend {
 
   /// Returns the list of `AssetKind` values that exist for [package] [version].
   ///
-  /// Returns an empty list if the [version] is not a semantic version or if
-  /// the info entity does not exist in the datastore.
-  Future<List<String>> getAssets(String package, String version) async {
+  /// Returns an empty list if the info entity does not exist in the datastore.
+  Future<List<String>?> getAssets(String package, String version) async {
     final assets = await cache
         .packageVersionAssetKinds(package, version)
         .obtain(() async {
           final info = await lookupPackageVersionInfo(package, version);
-          return info?.assets ?? <String>[];
+          return info?.assets;
         });
-    return assets ?? <String>[];
+    return assets;
   }
 
   /// Looks up a specific package version's asset object.

app/lib/shared/redis_cache.dart

@@ -162,7 +162,7 @@ class CachePatterns {
     String version,
   ) => _cache
       .withPrefix('package-version-asset-kinds/')
-      .withTTL(Duration(hours: 12))
+      .withTTL(Duration(minutes: 10))
       .withCodec(utf8)
       .withCodec(json)
       .withCodec(

app/lib/shared/versions.dart

@@ -24,10 +24,10 @@ final RegExp runtimeVersionPattern = RegExp(r'^\d{4}\.\d{2}\.\d{2}$');
 /// when the version switch happens.
 const _acceptedRuntimeVersions = <String>[
   // The current [runtimeVersion].
-  '2026.09.22',
+  '2026.09.27',
   // Fallback runtime versions.
+  '2026.09.22',
   '2026.09.18',
-  '2026.09.16',
 ];
 
 /// Sets the current runtime versions.

app/test/frontend/handlers/package_test.dart

@@ -2,6 +2,7 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+import 'package:pub_dev/shared/redis_cache.dart';
 import 'package:pub_dev/tool/test_profile/models.dart';
 import 'package:test/test.dart';
 
@@ -126,6 +127,10 @@ void main() {
         await expectNotFoundResponse(
           await issueGet('/packages/oxygen/versions/0.1.2'),
         );
+        expect(
+          await cache.packageVersionAssetKinds('oxygen', '0.1.2').get(),
+          isNull,
+        );
       },
     );