Use pickle instead of jsonutils for serialization

Pickle way of serialization is more preferrable
because sometimes we have non json-serializable object
in reply (e.g. cinder VolumeAttachment).

Change-Id: I56634d4b4b9817833044a0d8f15cc6362d599a4f

oslo_messaging/_drivers/zmq_driver/client/publishers/zmq_dealer_publisher.py

@@ -63,8 +63,8 @@ class DealerPublisher(zmq_publisher_base.PublisherMultisend):
         socket.send(b'', zmq.SNDMORE)
         socket.send_string(request.msg_type, zmq.SNDMORE)
         socket.send_string(message_id, zmq.SNDMORE)
-        socket.send_json(request.context, zmq.SNDMORE)
-        socket.send_json(request.message)
+        socket.send_pyobj(request.context, zmq.SNDMORE)
+        socket.send_pyobj(request.message)
 
         LOG.info(_LI("Sending message %(message)s to a target %(target)s")
                  % {"message": request.message,
@@ -85,7 +85,7 @@ class AcknowledgementReceiver(object):
     def _receive_acknowledgement(self, socket):
         empty = socket.recv()
         assert empty == b"", "Empty delimiter expected"
-        ack_message = socket.recv_json()
+        ack_message = socket.recv_pyobj()
         return ack_message
 
     def track_socket(self, socket):

oslo_messaging/_drivers/zmq_driver/client/publishers/zmq_publisher_base.py

@@ -93,8 +93,8 @@ class PublisherBase(object):
         :type request: zmq_request.Request
         """
         socket.send_string(request.msg_type, zmq.SNDMORE)
-        socket.send_json(request.context, zmq.SNDMORE)
-        socket.send_json(request.message)
+        socket.send_pyobj(request.context, zmq.SNDMORE)
+        socket.send_pyobj(request.message)
 
     def cleanup(self):
         """Cleanup publisher. Close allocated connections."""

oslo_messaging/_drivers/zmq_driver/client/publishers/zmq_req_publisher.py

@@ -64,7 +64,7 @@ class ReqPublisher(zmq_publisher_base.PublisherBase):
     def _receive_reply(socket, request):
 
         def _receive_method(socket):
-            return socket.recv_json()
+            return socket.recv_pyobj()
 
         # NOTE(ozamiatin): Check for retry here (no retries now)
         with contextlib.closing(zmq_async.get_reply_poller()) as poller:

oslo_messaging/_drivers/zmq_driver/server/consumers/zmq_pull_consumer.py

@@ -54,8 +54,8 @@ class PullConsumer(zmq_consumer_base.SingleSocketConsumer):
         try:
             msg_type = socket.recv_string()
             assert msg_type is not None, 'Bad format: msg type expected'
-            context = socket.recv_json()
-            message = socket.recv_json()
+            context = socket.recv_pyobj()
+            message = socket.recv_pyobj()
             LOG.info(_LI("Received %(msg_type)s message %(msg)s")
                      % {"msg_type": msg_type,
                         "msg": str(message)})

oslo_messaging/_drivers/zmq_driver/server/consumers/zmq_router_consumer.py

@@ -46,7 +46,7 @@ class RouterIncomingMessage(base.IncomingMessage):
         ack_message = {zmq_names.FIELD_ID: self.msg_id}
         self.socket.send(self.reply_id, zmq.SNDMORE)
         self.socket.send(b'', zmq.SNDMORE)
-        self.socket.send_json(ack_message)
+        self.socket.send_pyobj(ack_message)
 
     def requeue(self):
         """Requeue is not supported"""
@@ -73,8 +73,8 @@ class RouterConsumer(zmq_consumer_base.SingleSocketConsumer):
             if msg_type != zmq_names.CALL_TYPE:
                 msg_id = socket.recv_string()
 
-            context = socket.recv_json()
-            message = socket.recv_json()
+            context = socket.recv_pyobj()
+            message = socket.recv_pyobj()
             LOG.info(_LI("Received %(msg_type)s message %(msg)s")
                      % {"msg_type": msg_type,
                         "msg": str(message)})

oslo_messaging/_drivers/zmq_driver/server/zmq_incoming_message.py

@@ -48,7 +48,7 @@ class ZmqIncomingRequest(base.IncomingMessage):
         self.received = True
         self.reply_socket.send(self.reply_id, zmq.SNDMORE)
         self.reply_socket.send(b'', zmq.SNDMORE)
-        self.reply_socket.send_json(message_reply)
+        self.reply_socket.send_pyobj(message_reply)
         self.poller.resume_polling(self.reply_socket)
 
     def requeue(self):

oslo_messaging/_drivers/zmq_driver/zmq_socket.py

@@ -54,6 +54,9 @@ class ZmqSocket(object):
     def send_json(self, *args, **kwargs):
         self.handle.send_json(*args, **kwargs)
 
+    def send_pyobj(self, *args, **kwargs):
+        self.handle.send_pyobj(*args, **kwargs)
+
     def recv(self, *args, **kwargs):
         return self.handle.recv(*args, **kwargs)
 
@@ -63,6 +66,9 @@ class ZmqSocket(object):
     def recv_json(self, *args, **kwargs):
         return self.handle.recv_json(*args, **kwargs)
 
+    def recv_pyobj(self, *args, **kwargs):
+        return self.handle.recv_pyobj(*args, **kwargs)
+
     def close(self, *args, **kwargs):
         self.handle.close(*args, **kwargs)