#43 - fix the issues reported by flake8

amqp/adapter/cleverthis_service_adapter.py

@@ -7,26 +7,25 @@ import asyncio
 import inspect
 import json
 from asyncio import AbstractEventLoop
-from typing import Dict, List, Callable, Coroutine, Any
+from dataclasses import dataclass
+from typing import Any, Callable, Coroutine, Dict, List
 
 from aio_pika.abc import (
+    AbstractExchange,
     AbstractRobustChannel,
     AbstractRobustConnection,
-    AbstractExchange,
 )
-from aiohttp import ClientSession, ClientResponse
-from dataclasses import dataclass
+from aiohttp import ClientResponse, ClientSession
 from fastapi import HTTPException
 from pydantic import BaseModel
 from starlette.responses import FileResponse
 
-from amqp.adapter import serializer, pydantic_serializer
-from amqp.adapter.data_parser import AMQDataParser
+from amqp.adapter import serializer
 from amqp.adapter.data_response_factory import DataResponseFactory
 from amqp.adapter.file_handler import FileHandler, StreamingFileHandler
-from amqp.adapter.logging_utils import logging_error, logging_debug, logging_info
+from amqp.adapter.logging_utils import logging_debug, logging_error, logging_info
 from amqp.config.amq_configuration import AMQConfiguration
-from amqp.model.model import DataMessage, DataResponse, AMQErrorMessage
+from amqp.model.model import AMQErrorMessage, DataMessage, DataResponse
 from amqp.router.router_base import AMQ_REPLY_TO_EXCHANGE
 from amqp.router.utils import await_result
 
@@ -97,7 +96,7 @@ async def _convert_file_response(
         _exchange, obj.path, _routing_key, loop
     )
     # as above, but luckily this time we don't need to wait for the result
-    _future = asyncio.run_coroutine_threadsafe(_channel.close(), loop)
+    asyncio.run_coroutine_threadsafe(_channel.close(), loop)
     return json.dumps(
         {
             "files": [
@@ -262,7 +261,7 @@ class CleverThisServiceAdapter:
         :param auth_user: user authenticated by the API Gateway, as UserSchem
         :return: DataResponse to be sent back to the API Gateway via AMQP
         """
-        return await self.handle_possible_form(
+        return await self._authorize_forward_request(
             message,
             self.session.put(
                 f"http://{self.service_host}:{self.service_port}{message.path}",
@@ -280,7 +279,7 @@ class CleverThisServiceAdapter:
         :param auth_user: user authenticated by the API Gateway, as UserSchem
         :return: DataResponse to be sent back to the API Gateway via AMQP
         """
-        return await self.handle_possible_form(
+        return await self._authorize_forward_request(
             message,
             self.session.post(
                 f"http://{self.service_host}:{self.service_port}{message.path}",
@@ -290,10 +289,14 @@ class CleverThisServiceAdapter:
             auth_user,
         )
 
-    async def handle_possible_form(
+    async def _authorize_forward_request(
         self, message: DataMessage, request_coroutine, auth_user: Any
     ) -> DataResponse:
-        _args = AMQDataParser.parse_request_body(message)
+        """
+        This method is used to authorize the request and forward it to the CleverThis Service API.
+        However, it is only used for loose / 3rd party mode of coupling with the Service
+        """
+        # AMQDataParser.parse_request_body(message)
         return await request_coroutine
 
     async def head(self, message: DataMessage, auth_user: Any) -> DataResponse:

amqp/adapter/file_handler.py

@@ -4,22 +4,22 @@ implements the file downloader for the amqp adapter, where file is sent in chunk
 
 import asyncio
 import json
-import os
 import logging
-from asyncio import Future, AbstractEventLoop
+import os
+from asyncio import AbstractEventLoop
 from collections import defaultdict
 from pathlib import Path
 
-from aio_pika import connect_robust, Message
+from aio_pika import Message, connect_robust
 from aio_pika.abc import (
-    AbstractIncomingMessage,
-    AbstractRobustChannel,
-    AbstractQueue,
     AbstractExchange,
+    AbstractIncomingMessage,
+    AbstractQueue,
+    AbstractRobustChannel,
     DeliveryMode,
 )
 
-from amqp.adapter.logging_utils import logging_error, logging_debug, logging_info
+from amqp.adapter.logging_utils import logging_debug, logging_error, logging_info
 from amqp.router.utils import await_result
 
 # Global dictionary to track completed downloads
@@ -166,7 +166,6 @@ class StreamingFileHandler(FileHandler):
             message_data (dict): The entire message
             output_dir (str): The directory where the file should be saved.
         """
-        global download_locations
         filename = file_info["filename"]
         size = file_info["size"]
         stream_name = file_info["streamName"]
@@ -281,7 +280,6 @@ class StreamingFileHandler(FileHandler):
             loop: The asyncio event loop of the RabbitMQ API
             output_dir
         """
-        global download_locations
         try:
             _message_data = json.loads(message.body.decode())
             _amq_message_data = json.loads(json_data.decode())

amqp/adapter/service_message_factory.py

@@ -1,13 +1,12 @@
 import base64
-import logging
 
 from amqp.adapter.data_message_factory import DataMessageFactory
 from amqp.adapter.logging_utils import logging_error, logging_info
+from amqp.adapter.serializer import map_as_string, parse_map_string
 from amqp.adapter.trace_info_adapter import TraceInfoAdapter
 from amqp.model.model import ServiceMessage
 from amqp.model.service_message_type import ServiceMessageType
 from amqp.model.snowflake_id import SnowflakeId
-from amqp.adapter.serializer import parse_map_string, map_as_string
 
 RS = "|"
 SPLIT_RS = r"\|"

amqp/config/amq_configuration.py

@@ -5,7 +5,7 @@ import os
 from amqp.adapter.logging_utils import logging_error, logging_warning
 
 """
-Convert configuration from properties file to an object. 
+Convert configuration from properties file to an object.
 """
 
 

amqp/model/model.py

@@ -1,8 +1,8 @@
 import base64
 import json
-from enum import Enum
-from typing import List, Dict
 from dataclasses import dataclass, field
+from enum import Enum
+from typing import Dict, List
 
 from amqp.model.service_message_type import ServiceMessageType
 from amqp.model.snowflake_id import SnowflakeId
@@ -16,9 +16,24 @@ Define the structure of messages used in Clever Micro
 """
 
 
+@dataclass
 class CleverMicroMessage:
     DEFAULT_CONTENT_TYPE = ["application/octet-stream"]
 
+    """
+    The common structure of a message that transfers the user request to the Service and back. All data related messages
+    conform to this base structure:
+
+    magic - identifies the message type (REST, RPC, DataResponse)
+    id - unique message ID
+    m_field - method name (for REST style calls) or service name (for RPC style calls) or response code for DataResponse
+    d_field - domain name (for REST style calls) or module name (for RPC style calls) or  error code for DataResponse
+    p_field - path (for REST style calls) or method name (for RPC style calls) or error cause for DataResponse
+    headers - headers of the message (e.g. Content-Type, Accept, etc.)
+    trace_info - trace information (e.g. trace ID, span ID, etc. for Jaeger trace monitor)
+    base64body - the body of the message encoded in base64
+    """
+
     def __init__(
         self,
         magic: str,
@@ -66,11 +81,19 @@ class CleverMicroMessage:
     def body(self) -> bytes:
         return base64.b64decode(self.base64body())
 
-    def contentType(self) -> str:
+    def content_type(self) -> str:
         return self.headers().get("Content-Type", self.DEFAULT_CONTENT_TYPE)[0]
 
 
 class DataMessage(CleverMicroMessage):
+    """
+    The class represents a structure of a message that transfers the user request to the Service.
+    It may also be used to make a call/request between services.
+    The response to this call is in format of DataResponse class.
+
+    See DataMessageFactory for code to instantiate, serialize and deserialize the class
+    """
+
     def __init__(
         self,
         magic: str,
@@ -95,8 +118,17 @@ class DataMessage(CleverMicroMessage):
     def path(self) -> str:
         return self.p_field()
 
+    def routing_key(self) -> str:
+        return sanitize_as_rabbitmq_name(f"{self.d_field()}.{self.p_field()}")
+
 
 class DataResponse(CleverMicroMessage):
+    """
+    The response message to REST & RPC style calls (note: the request is made with DataMessage)
+
+    See DataResponseFactory for code to instantiate, serialize and deserialize the class
+    """
+
     def __init__(
         self,
         magic: str,
@@ -179,31 +211,6 @@ class AMQRoute:
         return self.__str__()
 
 
-@dataclass
-class DataMessage:
-    """
-    The class represents a structure of a message that transfers the user request to the Service.
-    It may also be used to make a call/request between services.
-    The response to this call is in format of DataResponse class.
-    Please see DataMessageFactory for code to instantiate, serialize and deserialize the class
-    """
-
-    magic: str
-    id: SnowflakeId
-    method: str
-    domain: str
-    path: str
-    headers: dict[str, List[str]]
-    trace_info: dict[str, str]
-    base64_body: bytes
-
-    def routing_key(self) -> str:
-        return sanitize_as_rabbitmq_name(f"{self.domain}.{self.path}")
-
-    def body(self) -> bytes:
-        return base64.b64decode(self.base64_body)
-
-
 class MultipartDataMessage(DataMessage):
     def __init__(self, message: DataMessage, extra_data: dict):
         super().__init__(
@@ -219,25 +226,6 @@ class MultipartDataMessage(DataMessage):
         self.extra_data = extra_data
 
 
-@dataclass
-class DataResponse:
-    """
-    The response message to RPC style call (note: the request is made with DataMessage)
-    Please see DataResponseFactory for code to instantiate, serialize and deserialize the class
-    """
-
-    id: str
-    response_code: int
-    content_type: str
-    response: bytes
-    error: str | None
-    error_cause: str | None
-    trace_info: dict[str, str]
-
-    def body(self) -> bytes:
-        return base64.b64decode(self.response)
-
-
 # Ensure backward compatibility
 AMQResponse = DataResponse
 

amqp/router/route_database.py

@@ -1,4 +1,3 @@
-import logging
 import re
 from typing import Set
 

amqp/router/router_base.py

@@ -1,8 +1,7 @@
-import logging
 from typing import Callable, List, Set
 
-from amqp.adapter.amq_route_factory import AMQRouteFactory, NULL_ROUTE
-from amqp.adapter.logging_utils import logging_error, logging_debug, logging_info
+from amqp.adapter.amq_route_factory import NULL_ROUTE, AMQRouteFactory
+from amqp.adapter.logging_utils import logging_debug, logging_error, logging_info
 from amqp.model.model import AMQRoute, DataMessage
 from amqp.router.route_database import RouteDatabase
 from amqp.router.utils import sanitize_as_rabbitmq_name

amqp/router/router_consumer.py

@@ -1,26 +1,26 @@
-import logging
 from typing import Set
 
 from aio_pika.abc import (
+    AbstractIncomingMessage,
     AbstractRobustChannel,
     AbstractRobustQueue,
-    AbstractIncomingMessage,
 )
+
 from amqp.adapter.amq_route_factory import AMQRouteFactory
 from amqp.adapter.logging_utils import (
+    logging_debug,
     logging_error,
     logging_info,
-    logging_debug,
     logging_warning,
 )
 from amqp.config.amq_configuration import AMQConfiguration
-from amqp.model.model import ServiceMessage, AMQRoute
+from amqp.model.model import AMQRoute, ServiceMessage
 from amqp.model.service_message_type import ServiceMessageType
 from amqp.router.router_base import (
+    ANY_RECIPIENT,
     CM_C_REQ_QUEUE,
     CM_REQUEST_EXCHANGE,
     CM_RESPONSE_EXCHANGE,
-    ANY_RECIPIENT,
 )
 from amqp.router.router_producer import RouterProducer
 

amqp/router/router_producer.py

@@ -7,22 +7,20 @@
 * forwards it to the application.
 """
 
-import logging
-
 from aio_pika import Message
 from aio_pika.abc import (
+    AbstractIncomingMessage,
     AbstractRobustChannel,
-    AbstractRobustQueue,
     AbstractRobustConnection,
     AbstractRobustExchange,
-    AbstractIncomingMessage,
+    AbstractRobustQueue,
 )
 from pika.exchange_type import ExchangeType
 
 from amqp.adapter.logging_utils import (
+    logging_debug,
     logging_error,
     logging_info,
-    logging_debug,
     logging_warning,
 )
 from amqp.adapter.service_message_factory import ServiceMessageFactory
@@ -30,13 +28,13 @@ from amqp.config.amq_configuration import AMQConfiguration
 from amqp.model.model import ServiceMessage
 from amqp.model.service_message_type import ServiceMessageType
 from amqp.router.router_base import (
-    RouterBase,
+    ANY_RECIPIENT,
+    CM_C_AMQ_QUEUE,
+    CM_P_REPLY_TO,
+    CM_P_RESP_QUEUE,
     CM_REQUEST_EXCHANGE,
     CM_RESPONSE_EXCHANGE,
-    CM_C_AMQ_QUEUE,
-    CM_P_RESP_QUEUE,
-    CM_P_REPLY_TO,
-    ANY_RECIPIENT,
+    RouterBase,
 )
 
 
@@ -58,7 +56,7 @@ class RouterProducer(RouterBase):
         self.cm_response_exchange: AbstractRobustExchange | None = None
 
         logging_info(
-            f"RouterProducer.<init>: %s, route: %s",
+            "RouterProducer.<init>: %s, route: %s",
             self.amq_configuration.amq_adapter.service_name,
             self.amq_configuration.amq_adapter.route_mapping,
         )
@@ -126,7 +124,7 @@ class RouterProducer(RouterBase):
         * routing data, invokes addRoute or removeRoute depending on the type of the message.
         """
         logging_info(
-            f"[%s] Received ROUTING DATA: [%s], msgId=%s",
+            "[%s] Received ROUTING DATA: [%s], msgId=%s",
             message.delivery_tag,
             message.body,
             message.message_id,

amqp/service/amq_message_handler.py

@@ -1,32 +1,31 @@
 import asyncio
+import os
 import threading
 import time
-import os
-from asyncio import Future, AbstractEventLoop
+from asyncio import AbstractEventLoop, Future
 from typing import Dict
 
 from aio_pika import Message
 from aio_pika.abc import AbstractIncomingMessage, AbstractRobustExchange
-
 from opentelemetry import trace
-from opentelemetry.trace.propagation.tracecontext import TraceContextTextMapPropagator
 from opentelemetry.trace import Tracer, TraceState
+from opentelemetry.trace.propagation.tracecontext import TraceContextTextMapPropagator
 
 from amqp.adapter.backpressure_handler import BackpressureHandler
+from amqp.adapter.cleverthis_service_adapter import AMQMessage, CleverThisServiceAdapter
 from amqp.adapter.data_message_factory import DataMessageFactory
 from amqp.adapter.data_response_factory import DataResponseFactory
-from amqp.adapter.cleverthis_service_adapter import CleverThisServiceAdapter, AMQMessage
-from amqp.adapter.file_handler import StreamingFileHandler, FileHandler
-from amqp.adapter.logging_utils import logging_error, logging_debug, logging_info
+from amqp.adapter.file_handler import FileHandler, StreamingFileHandler
+from amqp.adapter.logging_utils import logging_debug, logging_error, logging_info
+from amqp.adapter.serializer import map_as_string
 from amqp.adapter.service_message_factory import ServiceMessageFactory
 from amqp.config.amq_configuration import AMQConfiguration
 from amqp.model.model import (
-    DataResponse,
     DataMessage,
+    DataResponse,
     MultipartDataMessage,
 )
 from amqp.rabbitmq.rabbit_mq_client import RabbitMQClient
-from amqp.adapter.serializer import map_as_string
 
 
 def collect_trace_info():
@@ -266,7 +265,6 @@ class DataMessageHandler:
         :return:
         """
         reply_id = message.correlation_id
-        content_type = message.content_type
         delivery_tag = message.delivery_tag
         debug = f"######[{delivery_tag}] (RPC REPLY) env: {message.headers}, props: {message.properties}, BODY: {message.body.decode()}"
         logging_debug(debug)