Move away from ClientMiddleware and ClientAuthHandler in pydeephaven (#…

…5489)

* For debugging the gRPC error seen at optiver

* Move away from ClientMiddleware and ClientAuthHandler in pydeephaven.

* Cleanups.

* Cleanups.

* Remove unused import.

* type annotation for _refresh_token return.

* Remove test_mt.

* Fix issues with bi-streaming calls and typos.

* Followup to review comments from Jianfeng.

* Update _session_service.py after _auth_value rename.

* Followup to Corey's comments.

* Followup to Corey's comments.

* Limit refresh retries.

* Fixed forwarding.

* Do something more sane for wrap_rpc with pre-existing metadata.

* Again.

* Followup to review comments from Colin.

* Removed comment that didn't apply anymore.

* Followup to review comments.

* Removed file that I did not intend to add.

* Followup to review comments.

* Fix typos, thanks Jianfeng.

* Shorter.

* Followup to review comments.

* Followup to Colin's comments.

* Rework wrap.

* Fix typo, hat tip Jianfeng.

* remove unused imports.

* Moved to _services_lock for service initialization.

* Restore newline.

* remove newline

* remove spurious whitespace

* Add newline

* Add newline.

* Something.

* Ensure the program terminates if we run out of refresh attempts.

* Tweak retry failure case.

* Spurious whitespace.

* Fix types on update_matadata.

* Add type annotations

* One more type hint.

---------

Co-authored-by: jianfengmao <jianfengmao@deephaven.io>

py/client/pydeephaven/_app_service.py

@@ -15,9 +15,9 @@ def __init__(self, session):
     def list_fields(self) -> Any:
         """Fetches the current application fields."""
         try:
-            fields = self._grpc_app_stub.ListFields(
-                application_pb2.ListFieldsRequest(),
-                metadata=self.session.grpc_metadata
+            fields = self.session.wrap_bidi_rpc(
+                self._grpc_app_stub.ListFields,
+                application_pb2.ListFieldsRequest()
             )
             return fields
         except Exception as e:

py/client/pydeephaven/_arrow_flight_service.py

@@ -5,6 +5,7 @@
 import pyarrow as pa
 import pyarrow.flight as paflight
 
+from pyarrow.flight import FlightCallOptions
 from pydeephaven._arrow import map_arrow_type
 from pydeephaven.dherror import DHError
 from pydeephaven.table import Table
@@ -26,10 +27,10 @@ def import_table(self, data: pa.Table) -> Table:
                 dh_fields.append(pa.field(name=f.name, type=f.type, metadata=map_arrow_type(f.type)))
             dh_schema = pa.schema(dh_fields)
 
-            # No need to add headers/metadata here via the options argument;
-            # or middleware is already doing it for every call.
             writer, reader = self._flight_client.do_put(
-                pa.flight.FlightDescriptor.for_path("export", str(ticket)), dh_schema)
+                pa.flight.FlightDescriptor.for_path("export", str(ticket)),
+                dh_schema,
+                FlightCallOptions(headers=self.session.grpc_metadata))
             writer.write_table(data)
             # Note that pyarrow's write_table completes the gRPC. If we send another gRPC close
             # it is possible that by the time the request arrives at the server that it no longer
@@ -44,9 +45,10 @@ def do_get_table(self, table: Table) -> pa.Table:
         """Gets a snapshot of a Table via Flight do_get."""
         try:
             flight_ticket = paflight.Ticket(table.ticket.ticket)
-            # No need to add headers/metadata here via the options argument;
-            # or middleware is already doing it for every call.
-            reader = self._flight_client.do_get(flight_ticket)
+            reader = self._flight_client.do_get(
+                flight_ticket,
+                FlightCallOptions(headers=self.session.grpc_metadata))
+
             return reader.read_all()
         except Exception as e:
             raise DHError("failed to perform a flight DoGet on the table.") from e
@@ -59,7 +61,9 @@ def do_exchange(self):
         """
         try:
             desc = pa.flight.FlightDescriptor.for_command(b"dphn")
-            writer, reader = self._flight_client.do_exchange(desc)
+            writer, reader = self._flight_client.do_exchange(
+                desc,
+                FlightCallOptions(headers=self.session.grpc_metadata))
             return writer, reader
 
         except Exception as e:

py/client/pydeephaven/_config_service.py

@@ -15,9 +15,9 @@ def __init__(self, session):
     def get_configuration_constants(self) -> Dict[str, Any]:
         """Fetches the server configuration as a dict."""
         try:
-            response = self._grpc_app_stub.GetConfigurationConstants(config_pb2.ConfigurationConstantsRequest(),
-                                                                     metadata=self.session.grpc_metadata
-                                                                     )
+            response = self.session.wrap_rpc(
+                self._grpc_app_stub.GetConfigurationConstants,
+                config_pb2.ConfigurationConstantsRequest())
             return dict(response.config_values)
         except Exception as e:
             raise DHError("failed to get the configuration constants.") from e

py/client/pydeephaven/_console_service.py

@@ -23,9 +23,11 @@ def start_console(self):
             if not self.console_id:
                 try:
                     result_id = self.session.make_ticket()
-                    response = self._grpc_console_stub.StartConsole(
-                        console_pb2.StartConsoleRequest(result_id=result_id, session_type=self.session._session_type),
-                        metadata=self.session.grpc_metadata)
+                    response = self.session.wrap_rpc(
+                        self._grpc_console_stub.StartConsole,
+                        console_pb2.StartConsoleRequest(
+                            result_id=result_id,
+                            session_type=self.session._session_type))
                     self.console_id = response.result_id
                 except Exception as e:
                     raise DHError("failed to start a console.") from e
@@ -35,11 +37,11 @@ def run_script(self, server_script: str) -> Any:
         self.start_console()
 
         try:
-            response = self._grpc_console_stub.ExecuteCommand(
+            response = self.session.wrap_rpc(
+                self._grpc_console_stub.ExecuteCommand,
                 console_pb2.ExecuteCommandRequest(
                     console_id=self.console_id,
-                    code=server_script),
-                metadata=self.session.grpc_metadata)
+                    code=server_script))
             return response
         except Exception as e:
             raise DHError("failed to execute a command in the console.") from e
@@ -49,10 +51,11 @@ def bind_table(self, table: Table, variable_name: str):
         if not table or not variable_name:
             raise DHError("invalid table and/or variable_name values.")
         try:
-            response = self._grpc_console_stub.BindTableToVariable(
-                console_pb2.BindTableToVariableRequest(console_id=self.console_id,
-                                                       table_id=table.ticket,
-                                                       variable_name=variable_name),
-                metadata=self.session.grpc_metadata)
+            self.session.wrap_rpc(
+                self._grpc_console_stub.BindTableToVariable,
+                console_pb2.BindTableToVariableRequest(
+                    console_id=self.console_id,
+                    table_id=table.ticket,
+                    variable_name=variable_name))
         except Exception as e:
             raise DHError("failed to bind a table to a variable on the server.") from e

py/client/pydeephaven/_input_table_service.py

@@ -15,19 +15,20 @@ def __init__(self, session):
     def add(self, input_table: InputTable, table: Table):
         """Adds a table to the InputTable."""
         try:
-            response = self._grpc_input_table_stub.AddTableToInputTable(
+            self.session.wrap_rpc(
+                self._grpc_input_table_stub.AddTableToInputTable,
                 inputtable_pb2.AddTableRequest(input_table=input_table.ticket,
-                                               table_to_add=table.ticket),
-                metadata=self.session.grpc_metadata)
+                                               table_to_add=table.ticket))
         except Exception as e:
             raise DHError("failed to add to InputTable") from e
 
     def delete(self, input_table: InputTable, table: Table):
         """Deletes a table from an InputTable."""
         try:
-            response = self._grpc_input_table_stub.DeleteTableFromInputTable(
-                inputtable_pb2.DeleteTableRequest(input_table=input_table.ticket,
-                                                  table_to_remove=table.ticket),
-                metadata=self.session.grpc_metadata)
+            self.session.wrap_rpc(
+                self._grpc_input_table_stub.DeleteTableFromInputTable,
+                inputtable_pb2.DeleteTableRequest(
+                    input_table=input_table.ticket,
+                    table_to_remove=table.ticket))
         except Exception as e:
             raise DHError("failed to delete from InputTable") from e

py/client/pydeephaven/_plugin_obj_service.py

@@ -23,7 +23,9 @@ def __init__(self, session: 'pydeephaven.session.Session'):
     def message_stream(self, req_stream: PluginRequestStream) -> Any:
         """Opens a connection to the server-side implementation of this plugin."""
         try:
-            resp = self._grpc_app_stub.MessageStream(req_stream, metadata=self.session.grpc_metadata)
+            resp = self.session.wrap_bidi_rpc(
+                self._grpc_app_stub.MessageStream,
+                req_stream)
             return resp
         except Exception as e:
             raise DHError("failed to establish bidirectional stream with the server.") from e

py/client/pydeephaven/_session_service.py

@@ -30,16 +30,20 @@ def connect(self) -> grpc.Channel:
     def close(self):
         """Closes the gRPC connection."""
         try:
-            self._grpc_session_stub.CloseSession(
-                session_pb2.HandshakeRequest(auth_protocol=0, payload=self.session._auth_token),
-                metadata=self.session.grpc_metadata)
+            self.session.wrap_rpc(
+                self._grpc_session_stub.CloseSession,
+                session_pb2.HandshakeRequest(
+                    auth_protocol=0,
+                    payload=self.session._auth_header_value))
         except Exception as e:
             raise DHError("failed to close the session.") from e
 
     def release(self, ticket):
         """Releases an exported ticket."""
         try:
-            self._grpc_session_stub.Release(session_pb2.ReleaseRequest(id=ticket), metadata=self.session.grpc_metadata)
+            self.session.wrap_rpc(
+                self._grpc_session_stub.Release,
+                session_pb2.ReleaseRequest(id=ticket))
         except Exception as e:
             raise DHError("failed to release a ticket.") from e
 
@@ -52,6 +56,10 @@ def publish(self, source_ticket: ticket_pb2.Ticket, result_ticket: ticket_pb2.Ti
             result_ticket: The result ticket to publish to.
         """
         try:
-            self._grpc_session_stub.PublishFromTicket(session_pb2.PublishRequest(source_id=source_ticket, result_id=result_ticket), metadata=self.session.grpc_metadata)
+            self.session.wrap_rpc(
+                self._grpc_session_stub.PublishFromTicket,
+                session_pb2.PublishRequest(
+                    source_id=source_ticket,
+                    result_id=result_ticket))
         except Exception as e:
-            raise DHError("failed to publish a ticket.") from e
+            raise DHError("failed to publish a ticket.") from e

py/client/pydeephaven/_table_service.py

@@ -20,9 +20,9 @@ def batch(self, ops: List[TableOp]) -> Table:
         batch_ops = BatchOpAssembler(self.session, table_ops=ops).build_batch()
 
         try:
-            response = self._grpc_table_stub.Batch(
-                table_pb2.BatchTableRequest(ops=batch_ops),
-                metadata=self.session.grpc_metadata)
+            response = self.session.wrap_bidi_rpc(
+                self._grpc_table_stub.Batch,
+                table_pb2.BatchTableRequest(ops=batch_ops))
 
             exported_tables = []
             for exported in response:
@@ -46,9 +46,11 @@ def grpc_table_op(self, table: Table, op: TableOp, table_class: type = Table) ->
             else:
                 table_reference = None
             stub_func = op.__class__.get_stub_func(self._grpc_table_stub)
-            response = stub_func(op.make_grpc_request(result_id=result_id, source_id=table_reference),
-                                 metadata=self.session.grpc_metadata)
-
+            response = self.session.wrap_rpc(
+                stub_func,
+                op.make_grpc_request(
+                    result_id=result_id,
+                    source_id=table_reference))
             if response.success:
                 return table_class(self.session, ticket=response.result_id.ticket,
                                    schema_header=response.schema_header,
@@ -61,11 +63,13 @@ def grpc_table_op(self, table: Table, op: TableOp, table_class: type = Table) ->
 
     def fetch_etcr(self, ticket) -> Table:
         """Given a ticket, constructs a table around it, by fetching metadata from the server."""
-        response = self._grpc_table_stub.GetExportedTableCreationResponse(ticket, metadata=self.session.grpc_metadata)
+        response = self.session.wrap_rpc(
+            self._grpc_table_stub.GetExportedTableCreationResponse,
+            ticket)
         if response.success:
             return Table(self.session, ticket=response.result_id.ticket,
                          schema_header=response.schema_header,
                          size=response.size,
                          is_static=response.is_static)
-        else:
-            raise DHError(f"Server error received for ExportedTableCreationResponse: {response.error_info}")
+        raise DHError(
+            f"Server error received for ExportedTableCreationResponse: {response.error_info}")