fix(setupcheck): Make the Memcache setupcheck use the cache

Signed-off-by: Joas Schilling <[email protected]>

apps/settings/lib/SetupChecks/MemcacheConfigured.php

@@ -9,9 +9,11 @@
 namespace OCA\Settings\SetupChecks;
 
 use OC\Memcache\Memcached;
+use OCP\ICacheFactory;
 use OCP\IConfig;
 use OCP\IL10N;
 use OCP\IURLGenerator;
+use OCP\Server;
 use OCP\SetupCheck\ISetupCheck;
 use OCP\SetupCheck\SetupResult;
 
@@ -56,6 +58,42 @@ public function run(): SetupResult {
 				$this->urlGenerator->linkToDocs('admin-performance')
 			);
 		}
+
+		$cacheFactory = Server::get(ICacheFactory::class);
+		if ($cacheFactory->isLocalCacheAvailable()) {
+			$random = random_bytes(64);
+			$local = $cacheFactory->createLocal('setupcheck.local');
+			try {
+				$local->set('test', $random);
+				$local2 = $cacheFactory->createLocal('setupcheck.local');
+				$actual = $local2->get('test');
+				$local->remove('test');
+			} catch (\Throwable) {
+				$actual = null;
+			}
+
+			if ($actual !== $random) {
+				return SetupResult::error($this->l10n->t('Failed to write and read a value from local cache.'));
+			}
+		}
+
+		if ($cacheFactory->isAvailable()) {
+			$random = random_bytes(64);
+			$distributed = $cacheFactory->createDistributed('setupcheck');
+			try {
+				$distributed->set('test', $random);
+				$distributed2 = $cacheFactory->createDistributed('setupcheck');
+				$actual = $distributed2->get('test');
+				$distributed->remove('test');
+			} catch (\Throwable) {
+				$actual = null;
+			}
+
+			if ($actual !== $random) {
+				return SetupResult::error($this->l10n->t('Failed to write and read a value from distributed cache.'));
+			}
+		}
+
 		return SetupResult::success($this->l10n->t('Configured'));
 	}
 }