Implemented domain backward comp support enabled via domainsEnabled options on Server/ReplSet/Mongos and MongoClient.connect

Author: christkv

docs/reference/content/upgrade-migration/index.md

@@ -13,6 +13,8 @@ Key features of the 2.1 driver include:
 
 - Redesigned Connection Pool.
 - Connection close will drain any outstanding operations.
+- replicaSet parameter **MUST** be specified if using MongoClient to connect to replicaset, due to SDAM specification implementation.
+- domain support disabled by default, enable with parameter **domainsEnabled** on MongoClient or on the Server/ReplSet/Mongos.
 
 # What's New in 2.1
 

lib/mongos.js

@@ -53,7 +53,7 @@ var release = os.release();
    , 'sslCA', 'sslCert', 'sslKey', 'sslPass', 'socketOptions', 'bufferMaxEntries'
    , 'store', 'auto_reconnect', 'autoReconnect', 'emitError'
    , 'keepAlive', 'noDelay', 'connectTimeoutMS', 'socketTimeoutMS'
-   , 'loggerLevel', 'logger', 'reconnectTries', 'appname'];
+   , 'loggerLevel', 'logger', 'reconnectTries', 'appname', 'domainsEnabled'];
 
 /**
  * Creates a new Mongos instance
@@ -77,6 +77,7 @@ var release = os.release();
  * @param {number} [options.socketOptions.keepAlive=0] TCP KeepAlive on the socket with a X ms delay before start.
  * @param {number} [options.socketOptions.connectTimeoutMS=0] TCP Connection timeout setting
  * @param {number} [options.socketOptions.socketTimeoutMS=0] TCP Socket timeout setting
+ * @param {boolean} [options.domainsEnabled=false] Enable the wrapping of the callback in the current domain, disabled by default to avoid perf hit.
  * @fires Mongos#connect
  * @fires Mongos#ha
  * @fires Mongos#joined

lib/replset.js

@@ -48,7 +48,7 @@ var legalOptionNames = ['ha', 'haInterval', 'replicaSet', 'rs_name', 'secondaryA
   , 'sslCA', 'sslCert', 'sslKey', 'sslPass', 'socketOptions', 'bufferMaxEntries'
   , 'store', 'auto_reconnect', 'autoReconnect', 'emitError'
   , 'keepAlive', 'noDelay', 'connectTimeoutMS', 'socketTimeoutMS', 'strategy', 'debug'
-  , 'loggerLevel', 'logger', 'reconnectTries', 'appname'];
+  , 'loggerLevel', 'logger', 'reconnectTries', 'appname', 'domainsEnabled'];
 
 // Get package.json variable
 var driverVersion = require(__dirname + '/../package.json').version;
@@ -82,6 +82,7 @@ var release = os.release();
  * @param {number} [options.socketOptions.keepAlive=0] TCP KeepAlive on the socket with a X ms delay before start.
  * @param {number} [options.socketOptions.connectTimeoutMS=10000] TCP Connection timeout setting
  * @param {number} [options.socketOptions.socketTimeoutMS=0] TCP Socket timeout setting
+ * @param {boolean} [options.domainsEnabled=false] Enable the wrapping of the callback in the current domain, disabled by default to avoid perf hit.
  * @fires ReplSet#connect
  * @fires ReplSet#ha
  * @fires ReplSet#joined

lib/server.js

@@ -50,7 +50,7 @@ var release = os.release();
    , 'store', 'auto_reconnect', 'autoReconnect', 'emitError'
    , 'keepAlive', 'noDelay', 'connectTimeoutMS', 'socketTimeoutMS'
    , 'loggerLevel', 'logger', 'reconnectTries', 'reconnectInterval', 'monitoring'
-   , 'appname'];
+   , 'appname', 'domainsEnabled'];
 
 /**
  * Creates a new Server instance
@@ -77,6 +77,7 @@ var release = os.release();
  * @param {number} [options.reconnectInterval=1000] Server will wait # milliseconds between retries
  * @param {number} [options.monitoring=true] Triggers the server instance to call ismaster
  * @param {number} [options.haInterval=10000] The interval of calling ismaster when monitoring is enabled.
+ * @param {boolean} [options.domainsEnabled=false] Enable the wrapping of the callback in the current domain, disabled by default to avoid perf hit.
  * @fires Server#connect
  * @fires Server#close
  * @fires Server#error

test/runner.js

@@ -335,7 +335,10 @@ var testFiles = [
   , '/test/functional/reconnect_tests.js',
 
   // Bug tests
-  , '/test/functional/jira_bug_tests.js'
+  , '/test/functional/jira_bug_tests.js',
+
+  // Domain tests
+  , '/test/functional/domain_tests.js'
 ]
 
 // Check if we support es6 generators