Expose parserType as property on topology objects

Author: christkv

lib/mongos.js

@@ -88,6 +88,7 @@ var release = os.release();
  * @fires Mongos#error
  * @fires Mongos#timeout
  * @fires Mongos#parseError
+ * @property {string} parserType the parser type used (c++ or js).
  * @return {Mongos} a Mongos instance.
  */
 var Mongos = function(servers, options) {
@@ -207,6 +208,12 @@ Object.defineProperty(Mongos.prototype, 'isMasterDoc', {
   enumerable:true, get: function() { return this.s.mongos.lastIsMaster(); }
 });
 
+Object.defineProperty(Mongos.prototype, 'parserType', {
+  enumerable:true, get: function() {
+    return this.s.mongos.parserType;
+  }
+});
+
 // BSON property
 Object.defineProperty(Mongos.prototype, 'bson', {
   enumerable: true, get: function() {

lib/replset.js

@@ -91,6 +91,7 @@ var release = os.release();
  * @fires ReplSet#error
  * @fires ReplSet#timeout
  * @fires ReplSet#parseError
+ * @property {string} parserType the parser type used (c++ or js).
  * @return {ReplSet} a ReplSet instance.
  */
 var ReplSet = function(servers, options) {
@@ -215,6 +216,12 @@ Object.defineProperty(ReplSet.prototype, 'isMasterDoc', {
   enumerable:true, get: function() { return this.s.replset.lastIsMaster(); }
 });
 
+Object.defineProperty(ReplSet.prototype, 'parserType', {
+  enumerable:true, get: function() {
+    return this.s.replset.parserType;
+  }
+});
+
 // BSON property
 Object.defineProperty(ReplSet.prototype, 'bson', {
   enumerable: true, get: function() {

lib/server.js

@@ -85,6 +85,7 @@ var release = os.release();
  * @fires Server#timeout
  * @fires Server#parseError
  * @fires Server#reconnect
+ * @property {string} parserType the parser type used (c++ or js).
  * @return {Server} a Server instance.
  */
 var Server = function(host, port, options) {
@@ -212,6 +213,12 @@ Object.defineProperty(Server.prototype, 'isMasterDoc', {
   }
 });
 
+Object.defineProperty(Server.prototype, 'parserType', {
+  enumerable:true, get: function() {
+    return this.s.server.parserType;
+  }
+});
+
 // Last ismaster
 Object.defineProperty(Server.prototype, 'poolSize', {
   enumerable:true, get: function() { return this.s.server.connections().length; }

test/functional/connection_tests.js

@@ -84,6 +84,27 @@ exports['Should correctly connect to server using just events'] = {
   }
 }
 
+/**
+ * @ignore
+ */
+exports['Should correctly identify parser type'] = {
+  metadata: { requires: { topology: ['single', 'replicaset', 'sharded', 'ssl', 'heap', 'wiredtiger'] } },
+
+  // The actual test we wish to run
+  test: function(configuration, test) {
+    var db = configuration.newDbInstance({w:1}, {poolSize:1, auto_reconnect:true});
+    db.on('open', function(err, db) {
+      test.equal(null, err);
+      test.equal('js', db.serverConfig.parserType);
+
+      db.close();
+      test.done();
+    });
+
+    db.open();
+  }
+}
+
 /**
  * @ignore
  */
@@ -232,7 +253,7 @@ exports.testConnectAllOptions = {
             { server: {auto_reconnect: true, poolSize: 4},
               db: {native_parser: (process.env['TEST_NATIVE'] != null)} },
             connectionTester(test, 'testConnectAllOptions', function(db) {
-      test.equal(1, db.serverConfig.poolSize); 
+      test.equal(1, db.serverConfig.poolSize);
       test.equal(4, db.serverConfig.s.server.s.pool.size);
       test.equal(true, db.serverConfig.autoReconnect);
       db.close();