Backuping work on Postgres DB

requirements.txt

@@ -3,3 +3,5 @@ aiohttp >= 3.6.2
 lxml >= 4.2.1
 nest-asyncio >= 1.4.0
 irc >= 19.0.1
+beautifulsoup4>=4.9.3
+asyncpg>=0.22.0

src/bot.py

@@ -11,7 +11,7 @@ from typing import Generator
 from contextlib import asynccontextmanager
 from src.argparser import command_line_args
 from src.config import settings
-from src.database import db_cursor, db_connection
+from src.database import connection, setup_connection, shutdown_connection
 from src.exceptions import *
 from src.misc import get_paths, get_domain
 from src.msgqueue import messagequeue, send_to_discord
@@ -301,7 +301,7 @@ async def scan_group(group: str):
 					else:
 						local_wiki.rc_active = 0
 						DBHandler.add(queued_wiki.url, 0)
-					DBHandler.update_db()
+					await DBHandler.update_db()
 					continue
 				categorize_events = {}
 				targets = generate_targets(queued_wiki.url, "AND (rcid != -1 OR rcid IS NULL)")
@@ -347,7 +347,7 @@ async def scan_group(group: str):
 					if recent_changes:  # we don't have to test for highest_rc being null, because if there are no RC entries recent_changes will be an empty list which will result in false in here and DO NOT save the value
 						local_wiki.rc_active = highest_rc
 						DBHandler.add(queued_wiki.url, highest_rc)
-				DBHandler.update_db()
+				await DBHandler.update_db()
 		except asyncio.CancelledError:
 			return
 		except QueueEmpty:
@@ -426,7 +426,7 @@ async def discussion_handler():
 									                  ("-1", db_wiki["wiki"],))
 								else:
 									await local_wiki.remove(db_wiki["wiki"], 1000)
-								DBHandler.update_db()
+								await DBHandler.update_db()
 								continue
 							raise WikiError
 						discussion_feed = discussion_feed_resp["_embedded"]["doc:posts"]
@@ -445,7 +445,7 @@ async def discussion_handler():
 						DBHandler.add(db_wiki["wiki"], discussion_feed[-1]["id"], True)
 					else:
 						DBHandler.add(db_wiki["wiki"], "0", True)
-					DBHandler.update_db()
+					await DBHandler.update_db()
 					continue
 				comment_events = []
 				targets = generate_targets(db_wiki["wiki"], "AND NOT postid = '-1'")
@@ -496,7 +496,7 @@ async def discussion_handler():
 					DBHandler.add(db_wiki["wiki"], post["id"], True)
 				await asyncio.sleep(delay=2.0)  # hardcoded really doesn't need much more
 			await asyncio.sleep(delay=1.0) # Avoid lock on no wikis
-			DBHandler.update_db()
+			await DBHandler.update_db()
 	except asyncio.CancelledError:
 		pass
 	except:
@@ -510,8 +510,6 @@ async def discussion_handler():
 
 def shutdown(loop, signal=None):
 	global main_tasks
-	DBHandler.update_db()
-	db_connection.close()
 	loop.remove_signal_handler(signal)
 	if len(messagequeue) > 0:
 		logger.warning("Some messages are still queued!")
@@ -558,6 +556,8 @@ async def main_loop():
 		main_tasks["msg_queue_shield"] = asyncio.shield(main_tasks["message_sender"])
 		await asyncio.gather(main_tasks["wiki_scanner"], main_tasks["discussion_handler"], main_tasks["message_sender"])
 	except KeyboardInterrupt:
+		await DBHandler.update_db()
+		await shutdown_connection()
 		shutdown(loop)
 	except asyncio.CancelledError:
 		return

src/database.py

@@ -1,6 +1,18 @@
-import sqlite3
+import asyncpg
+from typing import Any, Union, Optional
 from src.config import settings
 
-db_connection = sqlite3.connect(settings.get("database_path", 'rcgcdb.db'))
-db_connection.row_factory = sqlite3.Row
-db_cursor = db_connection.cursor()
+connection: Optional[asyncpg.Connection] = None
+
+
+async def setup_connection():
+    global connection
+    # Establish a connection to an existing database named "test"
+    # as a "postgres" user.
+    connection: asyncpg.connection = await asyncpg.connect(user=settings["pg_user"], host=settings.get("pg_host", "localhost"),
+                                 database=settings.get("pg_db", "RcGcDb"), password=settings.get("pg_pass"))
+
+
+async def shutdown_connection():
+    global connection
+    await connection.close()

src/queue_handler.py

@@ -1,5 +1,5 @@
 import logging
-from src.database import db_cursor, db_connection
+from src.database import connection
 
 logger = logging.getLogger("rcgcdb.queue_handler")
 
@@ -14,14 +14,14 @@ class UpdateDB:
 	def clear_list(self):
 		self.updated.clear()
 
-	def update_db(self):
+	async def update_db(self):
+		async with connection.transaction():
 			for update in self.updated:
 				if update[2] is None:
 					sql = "UPDATE rcgcdw SET rcid = ? WHERE wiki = ? AND ( rcid != -1 OR rcid IS NULL )"
 				else:
 					sql = "UPDATE rcgcdw SET postid = ? WHERE wiki = ? AND ( postid != '-1' OR postid IS NULL )"
-			db_cursor.execute(sql, (update[1], update[0],))
-		db_connection.commit()
+				await connection.execute(sql)
 			self.clear_list()