Remove message name conflict and adds some base typing + fix bug with {} as default arg for fuction #105 (issue) (#107)

* Removed name conflict for Message and added some basic typing

* version bump

* Revert "Removed name conflict for Message and added some basic typing"

This reverts commit 696bece.

* removed formatting and add more typing

* removed formatting and add more typing

* Removed bug with empty dict as default argument

* Removed unused import of Dict and Any

---------

Co-authored-by: Michał Siwik <michalsiwik@MacBook-Pro-epruf-2.local>

Author: siwikm

memphis/memphis.py

@@ -1,3 +1,4 @@
+from __future__ import annotations
 # Credit for The NATS.IO Authors
 # Copyright 2021-2022 The Memphis Authors
 # Licensed under the Apache License, Version 2.0 (the “License”);
@@ -12,6 +13,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from typing import Iterable, Callable, Union
 import random
 import json
 import ssl
@@ -27,7 +29,6 @@
 from jsonschema import validate
 from google.protobuf import descriptor_pb2, descriptor_pool
 from google.protobuf.message_factory import MessageFactory
-from google.protobuf.message import Message
 
 import memphis.retention_types as retention_types
 import memphis.storage_types as storage_types
@@ -36,7 +37,7 @@
 
 
 class set_interval():
-    def __init__(self, func, sec):
+    def __init__(self, func: Callable, sec: int):
         def func_wrapper():
             self.t = Timer(sec, func_wrapper)
             self.t.start()
@@ -63,7 +64,7 @@ def __init__(self):
         self.update_configurations_sub = {}
         self.configuration_tasks = {}
 
-    async def get_msgs_update_configurations(self, iterable):
+    async def get_msgs_update_configurations(self, iterable: Iterable):
         try:
             async for msg in iterable:
                 message = msg.data.decode("utf-8")
@@ -87,7 +88,7 @@ async def configurations_listener(self):
         except Exception as err:
             raise MemphisError(err)
 
-    async def connect(self, host, username, connection_token, port=6666, reconnect=True, max_reconnect=10, reconnect_interval_ms=1500, timeout_ms=15000, cert_file='', key_file='', ca_file=''):
+    async def connect(self, host: str, username: str, connection_token: str, port: int = 6666, reconnect: bool = True, max_reconnect: int = 10, reconnect_interval_ms: int = 1500, timeout_ms: int = 15000, cert_file: str = "", key_file: str = "", ca_file: str = ""):
         """Creates connection with Memphis.
         Args:
             host (str): memphis host.
@@ -157,7 +158,8 @@ async def send_notification(self, title, msg, failedMsg, type):
         msgToSend = json.dumps(msg).encode('utf-8')
         await self.broker_manager.publish("$memphis_notifications", msgToSend)
 
-    async def station(self, name, retention_type=retention_types.MAX_MESSAGE_AGE_SECONDS, retention_value=604800, storage_type=storage_types.DISK, replicas=1, idempotency_window_ms=120000, schema_name="", send_poison_msg_to_dls=True, send_schema_failed_msg_to_dls=True):
+    async def station(self, name: str,
+        retention_type: str = retention_types.MAX_MESSAGE_AGE_SECONDS, retention_value: int = 604800, storage_type: str = storage_types.DISK, replicas: int = 1, idempotency_window_ms: int = 120000, schema_name: str = "", send_poison_msg_to_dls: bool = True, send_schema_failed_msg_to_dls: bool = True,):
         """Creates a station.
         Args:
             name (str): station name.
@@ -296,7 +298,7 @@ def __normalize_host(self, host):
         else:
             return host
 
-    async def producer(self, station_name, producer_name, generate_random_suffix=False):
+    async def producer(self, station_name: str, producer_name: str, generate_random_suffix: bool =False):
         """Creates a producer.
         Args:
             station_name (str): station name to produce messages into.
@@ -405,7 +407,7 @@ async def start_listen_for_schema_updates(self, station_name, schema_update_data
                 station_name, self.schema_updates_subs[station_name].messages))
             self.schema_tasks[station_name] = task
 
-    async def consumer(self, station_name, consumer_name, consumer_group="", pull_interval_ms=1000, batch_size=10, batch_max_time_to_wait_ms=5000, max_ack_time_ms=30000, max_msg_deliveries=10, generate_random_suffix=False, start_consume_from_sequence=1, last_messages=-1):
+    async def consumer(self, station_name: str, consumer_name: str, consumer_group: str ="", pull_interval_ms: int = 1000, batch_size: int = 10, batch_max_time_to_wait_ms: int =5000, max_ack_time_ms: int=30000, max_msg_deliveries: int=10, generate_random_suffix: bool=False, start_consume_from_sequence: int=1, last_messages: int=-1):
         """Creates a consumer.
         Args:.
             station_name (str): station name to consume messages from.
@@ -486,7 +488,7 @@ def add(self, key, value):
 
 
 class Station:
-    def __init__(self, connection, name):
+    def __init__(self, connection, name: str):
         self.connection = connection
         self.name = name.lower()
 
@@ -531,7 +533,7 @@ def get_internal_name(name: str) -> str:
 
 
 class Producer:
-    def __init__(self, connection, producer_name, station_name):
+    def __init__(self, connection, producer_name: str, station_name: str):
         self.connection = connection
         self.producer_name = producer_name.lower()
         self.station_name = station_name
@@ -628,10 +630,10 @@ def validate_graphql(self, message):
                 e = "Invalid message format, expected GraphQL"
             raise Exception("Schema validation has failed: " + str(e))
 
-    def get_dls_msg_id(self, station_name, producer_name, unix_time):
+    def get_dls_msg_id(self, station_name: str, producer_name: str, unix_time: str):
         return station_name + '~' + producer_name + '~0~' + unix_time
 
-    async def produce(self, message, ack_wait_sec=15, headers={}, async_produce=False, msg_id=None):
+    async def produce(self, message, ack_wait_sec: int = 15, headers: Union[Headers, None] = None, async_produce: bool=False, msg_id: Union[str, None]= None):
         """Produces a message into a station.
         Args:
             message (bytearray/dict): message to send into the station - bytearray/protobuf class (schema validated station - protobuf) or bytearray/dict (schema validated station - json schema) or string/bytearray/graphql.language.ast.DocumentNode (schema validated station - graphql schema)
@@ -650,10 +652,10 @@ async def produce(self, message, ack_wait_sec=15, headers={}, async_produce=Fals
                 "$memphis_producedBy": self.producer_name,
                 "$memphis_connectionId": self.connection.connection_id}
 
-            if msg_id != None:
+            if msg_id is not None:
                 memphis_headers["msg-id"] = msg_id
 
-            if headers != {}:
+            if headers is not None:
                 headers = headers.headers
                 headers.update(memphis_headers)
             else:
@@ -760,7 +762,7 @@ async def default_error_handler(e):
 
 
 class Consumer:
-    def __init__(self, connection, station_name, consumer_name, consumer_group, pull_interval_ms, batch_size, batch_max_time_to_wait_ms, max_ack_time_ms, max_msg_deliveries=10, error_callback=None, start_consume_from_sequence=1, last_messages=-1):
+    def __init__(self, connection, station_name: str, consumer_name, consumer_group, pull_interval_ms: int, batch_size: int, batch_max_time_to_wait_ms: int, max_ack_time_ms: int, max_msg_deliveries: int=10, error_callback=None, start_consume_from_sequence: int=1, last_messages: int=-1):
         self.connection = connection
         self.station_name = station_name.lower()
         self.consumer_name = consumer_name.lower()
@@ -775,6 +777,7 @@ def __init__(self, connection, station_name, consumer_name, consumer_group, pull
             error_callback = default_error_handler
         self.t_ping = asyncio.create_task(self.__ping_consumer(error_callback))
         self.start_consume_from_sequence = start_consume_from_sequence
+
         self.last_messages= last_messages
         self.context = {}
 
@@ -804,6 +807,7 @@ async def __consume(self, callback):
                             Message(msg, self.connection, self.consumer_group))
                     await callback(memphis_messages, None, self.context)
                     await asyncio.sleep(self.pull_interval_ms/1000)
+
                 except asyncio.TimeoutError:
                     await callback([], MemphisError("Memphis: TimeoutError"), self.context)
                     continue