Fix #701 by reverting the change for simultaneous request handling

.deepsource.toml

@@ -8,7 +8,9 @@ test_patterns = [
 exclude_patterns = [
   'setup.py',
   'docs-src/**/*.py',
-  'tutorial/**/*.py'
+  'tutorial/**/*.py',
+  'integration_tests/web/*.py',
+  'integration_tests/rtm/*.py'
 ]
 
 [[analyzers]]

integration_tests/rtm/test_issue_558.py

@@ -27,7 +27,7 @@ def tearDown(self):
         # Reset the decorators by @RTMClient.run_on
         RTMClient._callbacks = collections.defaultdict(list)
 
-    @pytest.mark.skipif(condition=is_not_specified(), reason="To avoid rate limited errors")
+    @pytest.mark.skipif(condition=is_not_specified(), reason="Still unfixed")
     @async_test
     async def test_issue_558(self):
         channel_id = os.environ[SLACK_SDK_TEST_RTM_TEST_CHANNEL_ID]

integration_tests/rtm/test_issue_701.py

@@ -0,0 +1,135 @@
+import asyncio
+import collections
+import logging
+import os
+import threading
+import time
+import unittest
+
+import pytest
+
+from integration_tests.env_variable_names import SLACK_SDK_TEST_CLASSIC_APP_BOT_TOKEN
+from integration_tests.helpers import async_test, is_not_specified
+from slack import RTMClient, WebClient
+
+
+class TestRTMClient(unittest.TestCase):
+    """Runs integration tests with real Slack API
+
+    https://github.com/slackapi/python-slackclient/issues/701
+    """
+
+    def setUp(self):
+        self.logger = logging.getLogger(__name__)
+        self.bot_token = os.environ[SLACK_SDK_TEST_CLASSIC_APP_BOT_TOKEN]
+
+    def tearDown(self):
+        # Reset the decorators by @RTMClient.run_on
+        RTMClient._callbacks = collections.defaultdict(list)
+
+    # @pytest.mark.skipif(condition=is_not_specified(), reason="to avoid rate_limited errors")
+    @pytest.mark.skip()
+    def test_receiving_all_messages(self):
+        self.rtm_client = RTMClient(token=self.bot_token, loop=asyncio.new_event_loop())
+        self.web_client = WebClient(token=self.bot_token)
+
+        self.call_count = 0
+
+        @RTMClient.run_on(event="message")
+        def send_reply(**payload):
+            self.logger.debug(payload)
+            web_client, data = payload["web_client"], payload["data"]
+            web_client.reactions_add(channel=data["channel"], timestamp=data["ts"], name="eyes")
+            self.call_count += 1
+
+        def connect():
+            self.logger.debug("Starting RTM Client...")
+            self.rtm_client.start()
+
+        rtm = threading.Thread(target=connect)
+        rtm.setDaemon(True)
+
+        rtm.start()
+        time.sleep(3)
+
+        total_num = 10
+
+        sender_completion = []
+
+        def sent_bulk_message():
+            for i in range(total_num):
+                text = f"Sent by <https://slack.dev/python-slackclient/|python-slackclient>! ({i})"
+                self.web_client.chat_postMessage(channel="#random", text=text)
+                time.sleep(0.1)
+            sender_completion.append(True)
+
+        num_of_senders = 3
+        senders = []
+        for sender_num in range(num_of_senders):
+            sender = threading.Thread(target=sent_bulk_message)
+            sender.setDaemon(True)
+            sender.start()
+            senders.append(sender)
+
+        while len(sender_completion) < num_of_senders:
+            time.sleep(1)
+
+        expected_call_count = total_num * num_of_senders
+        wait_seconds = 0
+        max_wait = 20
+        while self.call_count < expected_call_count and wait_seconds < max_wait:
+            time.sleep(1)
+            wait_seconds += 1
+
+        self.assertEqual(total_num * num_of_senders, self.call_count, "The RTM handler failed")
+
+    @pytest.mark.skipif(condition=is_not_specified(), reason="to avoid rate_limited errors")
+    @async_test
+    async def test_receiving_all_messages_async(self):
+        self.rtm_client = RTMClient(token=self.bot_token, run_async=True)
+        self.web_client = WebClient(token=self.bot_token, run_async=False)
+
+        self.call_count = 0
+
+        @RTMClient.run_on(event="message")
+        async def send_reply(**payload):
+            self.logger.debug(payload)
+            web_client, data = payload["web_client"], payload["data"]
+            await web_client.reactions_add(channel=data["channel"], timestamp=data["ts"], name="eyes")
+            self.call_count += 1
+
+        # intentionally not waiting here
+        self.rtm_client.start()
+
+        await asyncio.sleep(3)
+
+        total_num = 10
+
+        sender_completion = []
+
+        def sent_bulk_message():
+            for i in range(total_num):
+                text = f"Sent by <https://slack.dev/python-slackclient/|python-slackclient>! ({i})"
+                self.web_client.chat_postMessage(channel="#random", text=text)
+                time.sleep(0.1)
+            sender_completion.append(True)
+
+        num_of_senders = 3
+        senders = []
+        for sender_num in range(num_of_senders):
+            sender = threading.Thread(target=sent_bulk_message)
+            sender.setDaemon(True)
+            sender.start()
+            senders.append(sender)
+
+        while len(sender_completion) < num_of_senders:
+            await asyncio.sleep(1)
+
+        expected_call_count = total_num * num_of_senders
+        wait_seconds = 0
+        max_wait = 20
+        while self.call_count < expected_call_count and wait_seconds < max_wait:
+            await asyncio.sleep(1)
+            wait_seconds += 1
+
+        self.assertEqual(total_num * num_of_senders, self.call_count, "The RTM handler failed")

slack/rtm/client.py

@@ -394,12 +394,7 @@ async def _connect_and_read(self):
 
     async def _read_messages(self):
         """Process messages received on the WebSocket connection."""
-        text_message_callback_executions: List[Future] = []
         while not self._stopped and self._websocket is not None:
-            for future in text_message_callback_executions:
-                if future.done():
-                    text_message_callback_executions.remove(future)
-
             try:
                 # Wait for a message to be received, but timeout after a second so that
                 # we can check if the socket has been closed, or if self._stopped is
@@ -419,34 +414,22 @@ async def _read_messages(self):
                 )
                 self._websocket = None
                 await self._dispatch_event(event="close")
-                num_of_running_callbacks = len(text_message_callback_executions)
-                if num_of_running_callbacks > 0:
-                    self._logger.info(
-                        "WebSocket connection has been closed "
-                        f"though {num_of_running_callbacks} callback executions were still in progress"
-                    )
                 return
 
             if message.type == aiohttp.WSMsgType.TEXT:
-                payload = message.json()
-                event = payload.pop("type", "Unknown")
-
-                async def run_dispatch_event():
-                    try:
-                        await self._dispatch_event(event, data=payload)
-                    except Exception as err:
-                        data = message.data if message else message
-                        self._logger.info(
-                            f"Caught a raised exception ({err}) while dispatching a TEXT message ({data})"
-                        )
-                        # Raised exceptions here happen in users' code and were just unhandled.
-                        # As they're not intended for closing current WebSocket connection,
-                        # this exception should not be propagated to higher level (#_connect_and_read()).
-                        return
-
-                # Asynchronously run callbacks to handle simultaneous incoming messages from Slack
-                f = asyncio.ensure_future(run_dispatch_event())
-                text_message_callback_executions.append(f)
+                try:
+                    payload = message.json()
+                    event = payload.pop("type", "Unknown")
+                    await self._dispatch_event(event, data=payload)
+                except Exception as err:
+                    data = message.data if message else message
+                    self._logger.info(
+                        f"Caught a raised exception ({err}) while dispatching a TEXT message ({data})"
+                    )
+                    # Raised exceptions here happen in users' code and were just unhandled.
+                    # As they're not intended for closing current WebSocket connection,
+                    # this exception should not be propagated to higher level (#_connect_and_read()).
+                    continue
             elif message.type == aiohttp.WSMsgType.ERROR:
                 self._logger.error("Received an error on the websocket: %r", message)
                 await self._dispatch_event(event="error", data=message)
@@ -479,6 +462,8 @@ async def _dispatch_event(self, event, data=None):
                 }
             }
         """
+        if self._logger.level <= logging.DEBUG:
+            self._logger.debug("Received an event: '%s' - %s", event, data)
         for callback in self._callbacks[event]:
             self._logger.debug(
                 "Running %s callbacks for event: '%s'",