mirror of https://github.com/sgoudham/Enso-Bot.git
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
115 lines
4.7 KiB
Python
115 lines
4.7 KiB
Python
# Ensō~Chan - A Multi Purpose Discord Bot That Has Everything Your Server Needs!
|
|
# Copyright (C) 2020 Goudham Suresh
|
|
|
|
# This program is free software: you can redistribute it and/or modify
|
|
# it under the terms of the GNU General Public License as published by
|
|
# the Free Software Foundation, either version 3 of the License, or
|
|
# (at your option) any later version.
|
|
|
|
# This program is distributed in the hope that it will be useful,
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
# GNU General Public License for more details.
|
|
# You should have received a copy of the GNU General Public License
|
|
# along with this program. If not, see <https://www.gnu.org/licenses/>.
|
|
|
|
import threading
|
|
|
|
|
|
class CachingCircularQueue:
|
|
# When this lock is enabled, only the function it was called in can change
|
|
# The state of this class
|
|
threadLock = threading.Lock()
|
|
|
|
def __init__(self, size):
|
|
# The current queue
|
|
self.values = []
|
|
# The maximum size of the queue
|
|
self.MAX_SIZE = size
|
|
|
|
def push(self, value):
|
|
# thread safe
|
|
with self.threadLock:
|
|
# If the current size is less than the max size:
|
|
if len(self.values) < self.MAX_SIZE:
|
|
# Add the value to the end of the queue
|
|
self.values.append(value)
|
|
# Return None as the default return value of Push
|
|
return None
|
|
else:
|
|
# If the queue is full, add the value to the end of the list
|
|
self.values.append(value)
|
|
# Then remove and return the item at the start of the list
|
|
# Therefore we don't need to touch the size
|
|
return self.values.pop(0)
|
|
|
|
def pop(self):
|
|
# thread safe
|
|
with self.threadLock:
|
|
# should never try to pop an empty queue, you fucked up
|
|
assert len(self.values) > 0
|
|
# decrement the size
|
|
# return the first value of the array
|
|
return self.values.pop(0)
|
|
|
|
def remove(self, value):
|
|
# To my knowledge, this method can be called when deleting a single member and many members???
|
|
# So this should only be called to remove a single member at a time
|
|
with self.threadLock:
|
|
# Remove the value inside the array (value will be a tuple that is passed in)
|
|
# PRECONDITION, VALUE EXISTS IN CACHE, SO SHOULD EXIST IN LIST
|
|
self.values.remove(value)
|
|
# As you said, to ensure concurrency, set the current size back to the length of the array
|
|
|
|
|
|
class MyCoolCache:
|
|
threadLock = threading.Lock()
|
|
|
|
def __init__(self, size):
|
|
self.MAX_SIZE = size
|
|
self.queue = CachingCircularQueue(size)
|
|
self.cache = {}
|
|
|
|
def store_cache(self, key, dict_item):
|
|
with self.threadLock:
|
|
has_key = True
|
|
# Assume the key exists in the cache
|
|
if key in self.cache:
|
|
# If the key is None, aka removed
|
|
if self.cache[key] is None:
|
|
has_key = False
|
|
else:
|
|
# Or doesn't exist
|
|
has_key = False
|
|
|
|
# Then we don't have the key.
|
|
# In this case, we have to check if adding a key will exceed max size
|
|
if not has_key:
|
|
key_to_delete = self.queue.push(key)
|
|
# If the key is not None, that means the queue was full. We must delete an item.
|
|
|
|
if key_to_delete is not None:
|
|
self.cache[key_to_delete] = None
|
|
self.cache[key] = dict_item
|
|
|
|
def remove_many(self, in_guild_id):
|
|
# This method is to be used for when the bot has left a guild
|
|
with self.threadLock:
|
|
# Array to store keys to be removed
|
|
keys_to_remove = []
|
|
|
|
# For every member within the cache
|
|
for (member_id, guild_id) in self.cache:
|
|
# if the guild_id passed in is equal to the guild_id within the cache
|
|
if in_guild_id == guild_id:
|
|
# When removing a value from the cache due to a guild leave, permanently remove all values
|
|
# Yes it is expensive, however as this can run concurrently and we won't need the data available
|
|
# For this guild, it doesn't matter how long it takes, and will save in memory in the long term
|
|
# Store key within array
|
|
keys_to_remove.append((member_id, guild_id))
|
|
self.queue.remove((member_id, guild_id))
|
|
|
|
# Iterate through the array and then pop the keys from cache
|
|
for key in keys_to_remove:
|
|
self.cache.pop(key)
|