minor: refactor TCP_NODELAY

lib/mongo/connection.rb

@@ -623,8 +623,6 @@ module Mongo
         config = nil
 
         socket = @socket_class.new(host, port, @op_timeout, @connect_timeout) 
-        socket.setsockopt(Socket::IPPROTO_TCP, Socket::TCP_NODELAY, 1)
-
         config = self['admin'].command({:ismaster => 1}, :socket => socket)
       rescue OperationFailure, SocketError, SystemCallError, IOError
         close

lib/mongo/util/node.rb

@@ -40,11 +40,7 @@ module Mongo
           @connection.op_timeout, @connection.connect_timeout
         )
 
-        if socket.nil?
-          return nil
-        else
-          socket.setsockopt(Socket::IPPROTO_TCP, Socket::TCP_NODELAY, 1)
-        end
+        return nil if socket.nil?
       rescue OperationTimeout, ConnectionFailure, OperationFailure, SocketError, SystemCallError, IOError => ex
         @connection.log(:debug, "Failed connection to #{host_string} with #{ex.class}, #{ex.message}.")
         socket.close if socket

lib/mongo/util/pool.rb

@@ -157,7 +157,6 @@ module Mongo
     def checkout_new_socket
       begin
         socket = @connection.socket_class.new(@host, @port, @connection.op_timeout)
-        socket.setsockopt(Socket::IPPROTO_TCP, Socket::TCP_NODELAY, 1)
         socket.pool = self
       rescue => ex
         socket.close if socket

lib/mongo/util/ssl_socket.rb

@@ -16,6 +16,8 @@ module Mongo
       @connect_timeout = connect_timeout
 
       @socket = ::TCPSocket.new(host, port)
+      @socket.setsockopt(Socket::IPPROTO_TCP, Socket::TCP_NODELAY, 1)
+
       @ssl = OpenSSL::SSL::SSLSocket.new(@socket)
       @ssl.sync_close = true
       

lib/mongo/util/tcp_socket.rb

@@ -16,8 +16,10 @@ module Mongo
       # TODO: Prefer ipv6 if server is ipv6 enabled
       @host = Socket.getaddrinfo(host, nil, Socket::AF_INET).first[3]
       @port = port
+
       @socket_address = Socket.pack_sockaddr_in(@port, @host)
       @socket = Socket.new(Socket::AF_INET, Socket::SOCK_STREAM, 0)
+      @socket.setsockopt(Socket::IPPROTO_TCP, Socket::TCP_NODELAY, 1)
 
       connect
     end