SERVER-49989 Add db.hello() shell helper

(cherry picked from commit 27fda7a486ff4229f9037a132c3d8baa11121864)

2 files changed, 9 insertions, 0 deletions

diff --git a/src/mongo/shell/db.js b/src/mongo/shell/db.js
index 9dc7d8635bb..4c0c7df6a15 100644
--- a/src/mongo/shell/db.js
+++ b/src/mongo/shell/db.js
@@ -595,6 +595,7 @@ DB.prototype.help = function() {
         "\tdb.getWriteConcern() - returns the write concern used for any operations on this db, inherited from server object if set");
     print("\tdb.hostInfo() get details about the server's host");
     print("\tdb.isMaster() check replica primary status");
+    print("\tdb.hello() check replica primary status");
     print("\tdb.killOp(opid) kills the current operation in the db");
     print("\tdb.listCommands() lists all the db commands");
     print("\tdb.loadServerScripts() loads all the scripts in db.system.js");
@@ -927,6 +928,10 @@ DB.prototype.isMaster = function() {
     return this.runCommand("isMaster");
 };
 
+DB.prototype.hello = function() {
+    return this.runCommand("hello");
+};
+
 var commandUnsupported = function(res) {
     return (!res.ok &&
             (res.errmsg.startsWith("no such cmd") || res.errmsg.startsWith("no such command") ||
diff --git a/src/mongo/shell/utils.js b/src/mongo/shell/utils.js
index d474dcbeed7..5cc1481e7b3 100644
--- a/src/mongo/shell/utils.js
+++ b/src/mongo/shell/utils.js
@@ -1421,6 +1421,7 @@ rs.help = function() {
     print(
         "\trs.printSlaveReplicationInfo()             check replica set members and replication lag");
     print("\tdb.isMaster()                              check who is primary");
+    print("\tdb.hello()                              check who is primary");
     print();
     print("\treconfiguration helpers disconnect from the database so the shell will display");
     print("\tan error, even if the command succeeds.");
@@ -1441,6 +1442,9 @@ rs.status = function() {
 rs.isMaster = function() {
     return db.isMaster();
 };
+rs.hello = function() {
+    return db.hello();
+};
 rs.initiate = function(c) {
     return db._adminCommand({replSetInitiate: c});
 };