Addded an option (default disabled) to enable tcp keepalive

sjrpc/core/rpcconnection.py

@@ -59,7 +59,8 @@ class RpcConnection(object):
                   'write': select.POLLOUT, 'hup': select.POLLHUP,
                   'error': select.POLLERR | select.POLLNVAL}
 
-    def __init__(self, sock, loop=None, *args, **kwargs):
+    def __init__(self, sock, loop=None, enable_tcp_keepalive=False,
+                 *args, **kwargs):
         # Sock of this connection:
         self._sock = sock
         sock.setblocking(False)
@@ -71,7 +72,8 @@ class RpcConnection(object):
             self.loop = loop
 
         # Activate TCP keepalive on the connection:
-        #self._sock.setsockopt(socket.SOL_SOCKET, socket.SO_KEEPALIVE, 1)
+        if enable_tcp_keepalive:
+            self._sock.setsockopt(socket.SOL_SOCKET, socket.SO_KEEPALIVE, 1)
 
         # Watcher list:
         self._watchers = set()