1 files changed, 54 insertions, 0 deletions
diff --git a/lib/private/Memcache/WithLocalCache.php b/lib/private/Memcache/WithLocalCache.php
new file mode 100644
index 00000000000..5b7ccc10e39
--- /dev/null
+++ b/lib/private/Memcache/WithLocalCache.php
@@ -0,0 +1,54 @@
+<?php
+
+namespace OC\Memcache;
+
+use OCP\Cache\CappedMemoryCache;
+use OCP\ICache;
+
+/**
+ * Wrap a cache instance with an extra later of local, in-memory caching
+ */
+class WithLocalCache implements ICache {
+	private ICache $inner;
+	private CappedMemoryCache $cached;
+
+	public function __construct(ICache $inner, int $localCapacity = 512) {
+		$this->inner = $inner;
+		$this->cached = new CappedMemoryCache($localCapacity);
+	}
+
+	public function get($key) {
+		if (isset($this->cached[$key])) {
+			return $this->cached[$key];
+		} else {
+			$value = $this->inner->get($key);
+			if (!is_null($value)) {
+				$this->cached[$key] = $value;
+			}
+			return $value;
+		}
+	}
+
+	public function set($key, $value, $ttl = 0) {
+		$this->cached[$key] = $value;
+		return $this->inner->set($key, $value, $ttl);
+	}
+
+	public function hasKey($key) {
+		return isset($this->cached[$key]) || $this->inner->hasKey($key);
+	}
+
+	public function remove($key) {
+		unset($this->cached[$key]);
+		return $this->inner->remove($key);
+	}
+
+	public function clear($prefix = '') {
+		$this->cached->clear();
+		return $this->inner->clear($prefix);
+	}
+
+	public static function isAvailable(): bool {
+		return false;
+	}
+}