+ /**
+ * @param string $script
+ * @param array $params
+ * @param integer $numKeys
+ * @return mixed
+ * @throws RedisException
+ */
+ public function luaEval( $script, array $params, $numKeys ) {
+ $sha1 = sha1( $script ); // 40 char hex
+ $conn = $this->conn; // convenience
+
+ // Try to run the server-side cached copy of the script
+ $conn->clearLastError();
+ $res = $conn->evalSha( $sha1, $params, $numKeys );
+ // If the script is not in cache, use eval() to retry and cache it
+ if ( preg_match( '/^NOSCRIPT/', $conn->getLastError() ) ) {
+ $conn->clearLastError();
+ $res = $conn->eval( $script, $params, $numKeys );
+ wfDebugLog( 'redis', "Used eval() for Lua script $sha1." );
+ }
+
+ if ( $conn->getLastError() ) { // script bug?
+ wfDebugLog( 'redis', "Lua script error: " . $conn->getLastError() );
+ }
+
+ return $res;
+ }
+
+ /**
+ * @param RedisConnRef $conn
+ * @return bool
+ */