--- /dev/null
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+/*
+ * Ceph - scalable distributed file system
+ *
+ * Copyright (C) 2016 SUSE LINUX GmbH
+ *
+ * This is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License version 2.1, as published by the Free Software
+ * Foundation. See file COPYING.
+ *
+ */
+
+#ifndef CEPH_JOURNAL_JOURNAL_METADATA_LISTENER_H
+#define CEPH_JOURNAL_JOURNAL_METADATA_LISTENER_H
+
+namespace journal {
+
+class JournalMetadata;
+
+struct JournalMetadataListener {
+ virtual ~JournalMetadataListener() {};
+ virtual void handle_update(JournalMetadata *) = 0;
+};
+
+} // namespace journal
+
+#endif // CEPH_JOURNAL_JOURNAL_METADATA_LISTENER_H
+