ShoutViewStorage refactor

main.py

@@ -13,7 +13,9 @@ from auth.oauth import oauth_login, oauth_authorize
 from auth.email import email_authorize
 from redis import redis
 from resolvers.base import resolvers
-from resolvers.zine import GitTask, TopShouts, db_flush_worker
+from resolvers.zine import GitTask, TopShouts
+
+from orm.shout import ShoutViewStorage
 
 import asyncio
 
@@ -29,7 +31,7 @@ async def start_up():
 	await redis.connect()
 	git_task = asyncio.create_task(GitTask.git_task_worker())
 	top_shouts_task = asyncio.create_task(TopShouts.worker())
-	db_flush_task = asyncio.create_task(db_flush_worker())
+	view_storage_task = asyncio.create_task(ShoutViewStorage.worker())
 
 async def shutdown():
 	await redis.disconnect()

orm/__init__.py

@@ -17,4 +17,4 @@ Resource.init_table()
 
 with local_session() as session:
 	rating_storage = ShoutRatingStorage(session)
-	view_storage = ShoutViewStorage(session)
+	ShoutViewStorage.init(session)

orm/shout.py

@@ -1,14 +1,16 @@
 from typing import List
-from datetime import datetime
+from datetime import datetime, timedelta
 from sqlalchemy import Table, Column, Integer, String, ForeignKey, DateTime, Boolean
 from sqlalchemy.orm import relationship
 from sqlalchemy.orm.attributes import flag_modified
 from orm import Permission, User, Topic
 from orm.comment import Comment
-from orm.base import Base
+from orm.base import Base, local_session
 
 from functools import reduce
 
+import asyncio
+
 class ShoutAuthor(Base):
 	__tablename__ = "shout_author"
 	
@@ -68,9 +70,17 @@ class ShoutViewByDay(Base):
 
 class ShoutViewStorage:
 
-	def __init__(self, session):
+	views = []
+	this_day_views = {}
+
+	period = 30*60 #sec
+
+	lock = asyncio.Lock()
+
+	@staticmethod
+	def init(session):
+		self = ShoutViewStorage
 		self.views = session.query(ShoutViewByDay).all()
-		self.this_day_views = {}
 		for view in self.views:
 			shout_id = view.shout_id
 			if not shout_id in self.this_day_views:
@@ -79,13 +89,19 @@ class ShoutViewStorage:
 			if this_day_view.day < view.day:
 				self.this_day_views[shout_id] = view
 
-	def get_view(self, shout_id):
-		shout_views = list(filter(lambda x: x.shout_id == shout_id, self.views))
+	@staticmethod
+	async def get_view(shout_id):
+		async with ShoutViewStorage.lock:
+			shout_views = list(filter(lambda x: x.shout_id == shout_id, ShoutViewStorage.views))
 		return reduce((lambda x, y: x + y.value), shout_views, 0)
 
-	def inc_view(self, shout_id):
+	@staticmethod
+	async def inc_view(shout_id):
+		self = ShoutViewStorage
+		async with ShoutViewStorage.lock:
 			this_day_view = self.this_day_views.get(shout_id)
-		if not this_day_view:
+			day_start = datetime.now().replace(hour = 0, minute = 0, second = 0)
+			if not this_day_view or this_day_view.day < day_start:
 				this_day_view = ShoutViewByDay.create(shout_id = shout_id, value = 1)
 				self.this_day_views[shout_id] = this_day_view
 				self.views.append(this_day_view)
@@ -93,14 +109,28 @@ class ShoutViewStorage:
 				this_day_view.value = this_day_view.value + 1
 				this_day_view.modified = True
 
-	def flush_changes(self, session):
-		for view in self.this_day_views.values():
+	@staticmethod
+	async def flush_changes(session):
+		async with ShoutViewStorage.lock:
+			for view in ShoutViewStorage.this_day_views.values():
 				if getattr(view, "modified", False):
 					session.add(view)
 					flag_modified(view, "value")
 					view.modified = False
 		session.commit()
 
+	@staticmethod
+	async def worker():
+		print("ShoutViewStorage worker start")
+		while True:
+			try:
+				print("ShoutViewStorage worker: flush changes")
+				with local_session() as session:
+					await ShoutViewStorage.flush_changes(session)
+			except Exception as err:
+				print("ShoutViewStorage worker: error = %s" % (err))
+			await asyncio.sleep(ShoutViewStorage.period)
+
 
 class Shout(Base):
 	__tablename__ = 'shout'

resolvers/zine.py

@@ -1,5 +1,5 @@
 from orm import Shout, ShoutAuthor, ShoutTopic, ShoutRating, ShoutViewByDay, User, Community, Resource,\
-	rating_storage, view_storage
+	rating_storage, ShoutViewStorage
 from orm.base import local_session
 
 from resolvers.base import mutation, query
@@ -165,17 +165,6 @@ class TopShouts:
 				print("top shouts worker error = %s" % (err))
 			await asyncio.sleep(TopShouts.period)
 
-async def db_flush_worker():
-	print("db flush worker start")
-	while True:
-		try:
-			print("flush changes")
-			with local_session() as session:
-				view_storage.flush_changes(session)
-		except Exception as err:
-			print("db flush worker error = %s" % (err))
-		await asyncio.sleep(30*60)
-
 
 @query.field("topShoutsByView")
 async def top_shouts_by_view(_, info, limit):
@@ -297,7 +286,7 @@ async def rate_shout(_, info, shout_id, value):
 
 @mutation.field("viewShout")
 async def view_shout(_, info, shout_id):
-	view_storage.inc_view(shout_id)
+	await ShoutViewStorage.inc_view(shout_id)
 	return {"error" : ""}
 
 @query.field("getShoutBySlug")
@@ -311,5 +300,5 @@ async def get_shout_by_slug(_, info, slug):
 			options(select_options).\
 			filter(Shout.slug == slug).first()
 	shout.rating = rating_storage.get_rating(shout.id)
-	shout.views = view_storage.get_view(shout.id)
+	shout.views = await ShoutViewStorage.get_view(shout.id)
 	return shout