SERVER-24676 implement support for maxStalenessMS in ReplicaSetMonitor

1 files changed, 12 insertions, 8 deletions

diff --git a/src/mongo/client/replica_set_monitor_internal.h b/src/mongo/client/replica_set_monitor_internal.h
index 4dbf9cb7996..eff1670d558 100644
--- a/src/mongo/client/replica_set_monitor_internal.h
+++ b/src/mongo/client/replica_set_monitor_internal.h
@@ -68,17 +68,18 @@ struct ReplicaSetMonitor::IsMasterReply {
     bool isMaster;
     bool secondary;
     bool hidden;
-    int configVersion{0};
+    int configVersion{};
     OID electionId;                     // Set if this isMaster reply is from the primary
     HostAndPort primary;                // empty if not present
     std::set<HostAndPort> normalHosts;  // both "hosts" and "passives"
     BSONObj tags;
-    int minWireVersion{0};
-    int maxWireVersion{0};
+    int minWireVersion{};
+    int maxWireVersion{};
 
     // remaining fields aren't in isMaster reply, but are known to caller.
     HostAndPort host;
     int64_t latencyMicros;  // ignored if negative
+    Date_t lastWriteDate{};
 };
 
 struct ReplicaSetMonitor::SetState {
@@ -117,11 +118,14 @@ public:
 
         HostAndPort host;
         bool isUp{false};
-        bool isMaster{false};   // implies isUp
-        int64_t latencyMicros;  // unknownLatency if unknown
-        BSONObj tags;           // owned
-        int minWireVersion{0};
-        int maxWireVersion{0};
+        bool isMaster{false};
+        int64_t latencyMicros{};
+        BSONObj tags;  // owned
+        int minWireVersion{};
+        int maxWireVersion{};
+        Date_t lastWriteDate{};            // from isMasterReply
+        Date_t lastWriteDateUpdateTime{};  // set to the local system's time at the time of updating
+                                           // lastWriteDate
     };
 
     typedef std::vector<Node> Nodes;