From 1609a371804f17648239f3b1d4d8b29bbbd4b3fe Mon Sep 17 00:00:00 2001
From: Matt Broadstone <mbroadst@gmail.com>
Date: Mon, 2 Oct 2017 14:55:57 -0400
Subject: [PATCH] feat(topologies): expose underlaying
 `logicalSessionTimeoutMinutes'

NODE-1088
---
 lib/topologies/mongos.js  | 7 +++++++
 lib/topologies/replset.js | 7 +++++++
 lib/topologies/server.js  | 7 +++++++
 3 files changed, 21 insertions(+)

diff --git a/lib/topologies/mongos.js b/lib/topologies/mongos.js
index 315edcadf2..6ab231d302 100644
--- a/lib/topologies/mongos.js
+++ b/lib/topologies/mongos.js
@@ -266,6 +266,13 @@ Object.defineProperty(Mongos.prototype, 'haInterval', {
   }
 });
 
+Object.defineProperty(Mongos.prototype, 'logicalSessionTimeoutMinutes', {
+  enumerable: true,
+  get: function() {
+    return this.s.coreTopology.logicalSessionTimeoutMinutes;
+  }
+});
+
 // Connect
 Mongos.prototype.connect = function(db, _options, callback) {
   var self = this;
diff --git a/lib/topologies/replset.js b/lib/topologies/replset.js
index 0d0d27932c..906a5b34b9 100644
--- a/lib/topologies/replset.js
+++ b/lib/topologies/replset.js
@@ -291,6 +291,13 @@ Object.defineProperty(ReplSet.prototype, 'haInterval', {
   }
 });
 
+Object.defineProperty(ReplSet.prototype, 'logicalSessionTimeoutMinutes', {
+  enumerable: true,
+  get: function() {
+    return this.s.coreTopology.logicalSessionTimeoutMinutes;
+  }
+});
+
 var define = (ReplSet.define = new Define('ReplSet', ReplSet, false));
 
 // Ensure the right read Preference object
diff --git a/lib/topologies/server.js b/lib/topologies/server.js
index dc9921936e..526a5c2beb 100644
--- a/lib/topologies/server.js
+++ b/lib/topologies/server.js
@@ -288,6 +288,13 @@ Object.defineProperty(Server.prototype, 'port', {
   }
 });
 
+Object.defineProperty(Server.prototype, 'logicalSessionTimeoutMinutes', {
+  enumerable: true,
+  get: function() {
+    return this.s.coreTopology.logicalSessionTimeoutMinutes;
+  }
+});
+
 // Connect
 // Server.prototype.connect = function(db, _options, callback) {
 Server.prototype.connect = function(_options, callback) {