SERVER-26848 Exit catchup mode when not syncing more data.

1 files changed, 15 insertions, 0 deletions

diff --git a/src/mongo/db/repl/topology_coordinator.h b/src/mongo/db/repl/topology_coordinator.h
index 2a2fc1259fb..37aad7459fa 100644
--- a/src/mongo/db/repl/topology_coordinator.h
+++ b/src/mongo/db/repl/topology_coordinator.h
@@ -499,6 +499,21 @@ public:
      */
     virtual void setStorageEngineSupportsReadCommitted(bool supported) = 0;
 
+    /**
+     * Reset the booleans to record the last heartbeat restart.
+     */
+    virtual void restartHeartbeats() = 0;
+
+    /**
+     * Scans through all members that are 'up' and return the latest known optime, if we have
+     * received (successful or failed) heartbeats from all nodes since heartbeat restart.
+     *
+     * Returns boost::none if any node hasn't responded to a heartbeat since we last restarted
+     * heartbeats.
+     * Returns OpTime(Timestamp(0, 0), 0), the smallest OpTime in PV1, if other nodes are all down.
+     */
+    virtual boost::optional<OpTime> latestKnownOpTimeSinceHeartbeatRestart() const = 0;
+
 protected:
     TopologyCoordinator() {}
 };