1 files changed, 46 insertions, 0 deletions
diff --git a/src/mon/MonSub.h b/src/mon/MonSub.h
new file mode 100644
index 000000000..8ff5a8f18
--- /dev/null
+++ b/src/mon/MonSub.h
@@ -0,0 +1,46 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#pragma once
+
+#include <map>
+#include <string>
+
+#include "common/ceph_time.h"
+#include "include/types.h"
+
+// mon subscriptions
+class MonSub
+{
+public:
+  // @returns true if there is any "new" subscriptions
+  bool have_new() const;
+  auto get_subs() const {
+    return sub_new;
+  }
+  bool need_renew() const;
+  // change the status of "new" subscriptions to "sent"
+  void renewed();
+  // the peer acked the subscription request
+  void acked(uint32_t interval);
+  void got(const std::string& what, version_t version);
+  // revert the status of subscriptions from "sent" to "new"
+  // @returns true if there is any pending "new" subscriptions
+  bool reload();
+  // add a new subscription
+  bool want(const std::string& what, version_t start, unsigned flags);
+  // increment the requested subscription start point. If you do increase
+  // the value, apply the passed-in flags as well; otherwise do nothing.
+  bool inc_want(const std::string& what, version_t start, unsigned flags);
+  // cancel a subscription
+  void unwant(const std::string& what);
+private:
+  // my subs, and current versions
+  std::map<std::string,ceph_mon_subscribe_item> sub_sent;
+  // unsent new subs
+  std::map<std::string,ceph_mon_subscribe_item> sub_new;
+  using time_point = ceph::coarse_mono_time;
+  using clock = typename time_point::clock;
+  time_point renew_sent;
+  time_point renew_after;
+};