mirror of
https://github.com/AUTOMATIC1111/stable-diffusion-webui.git
synced 2024-12-29 19:05:05 +08:00
124 lines
4.0 KiB
Python
124 lines
4.0 KiB
Python
import json
|
|
import os
|
|
import os.path
|
|
import threading
|
|
|
|
import diskcache
|
|
import tqdm
|
|
|
|
from modules.paths import data_path, script_path
|
|
|
|
cache_filename = os.environ.get('SD_WEBUI_CACHE_FILE', os.path.join(data_path, "cache.json"))
|
|
cache_dir = os.environ.get('SD_WEBUI_CACHE_DIR', os.path.join(data_path, "cache"))
|
|
caches = {}
|
|
cache_lock = threading.Lock()
|
|
|
|
|
|
def dump_cache():
|
|
"""old function for dumping cache to disk; does nothing since diskcache."""
|
|
|
|
pass
|
|
|
|
|
|
def make_cache(subsection: str) -> diskcache.Cache:
|
|
return diskcache.Cache(
|
|
os.path.join(cache_dir, subsection),
|
|
size_limit=2**32, # 4 GB, culling oldest first
|
|
disk_min_file_size=2**18, # keep up to 256KB in Sqlite
|
|
)
|
|
|
|
|
|
def convert_old_cached_data():
|
|
try:
|
|
with open(cache_filename, "r", encoding="utf8") as file:
|
|
data = json.load(file)
|
|
except FileNotFoundError:
|
|
return
|
|
except Exception:
|
|
os.replace(cache_filename, os.path.join(script_path, "tmp", "cache.json"))
|
|
print('[ERROR] issue occurred while trying to read cache.json; old cache has been moved to tmp/cache.json')
|
|
return
|
|
|
|
total_count = sum(len(keyvalues) for keyvalues in data.values())
|
|
|
|
with tqdm.tqdm(total=total_count, desc="converting cache") as progress:
|
|
for subsection, keyvalues in data.items():
|
|
cache_obj = caches.get(subsection)
|
|
if cache_obj is None:
|
|
cache_obj = make_cache(subsection)
|
|
caches[subsection] = cache_obj
|
|
|
|
for key, value in keyvalues.items():
|
|
cache_obj[key] = value
|
|
progress.update(1)
|
|
|
|
|
|
def cache(subsection):
|
|
"""
|
|
Retrieves or initializes a cache for a specific subsection.
|
|
|
|
Parameters:
|
|
subsection (str): The subsection identifier for the cache.
|
|
|
|
Returns:
|
|
diskcache.Cache: The cache data for the specified subsection.
|
|
"""
|
|
|
|
cache_obj = caches.get(subsection)
|
|
if not cache_obj:
|
|
with cache_lock:
|
|
if not os.path.exists(cache_dir) and os.path.isfile(cache_filename):
|
|
convert_old_cached_data()
|
|
|
|
cache_obj = caches.get(subsection)
|
|
if not cache_obj:
|
|
cache_obj = make_cache(subsection)
|
|
caches[subsection] = cache_obj
|
|
|
|
return cache_obj
|
|
|
|
|
|
def cached_data_for_file(subsection, title, filename, func):
|
|
"""
|
|
Retrieves or generates data for a specific file, using a caching mechanism.
|
|
|
|
Parameters:
|
|
subsection (str): The subsection of the cache to use.
|
|
title (str): The title of the data entry in the subsection of the cache.
|
|
filename (str): The path to the file to be checked for modifications.
|
|
func (callable): A function that generates the data if it is not available in the cache.
|
|
|
|
Returns:
|
|
dict or None: The cached or generated data, or None if data generation fails.
|
|
|
|
The `cached_data_for_file` function implements a caching mechanism for data stored in files.
|
|
It checks if the data associated with the given `title` is present in the cache and compares the
|
|
modification time of the file with the cached modification time. If the file has been modified,
|
|
the cache is considered invalid and the data is regenerated using the provided `func`.
|
|
Otherwise, the cached data is returned.
|
|
|
|
If the data generation fails, None is returned to indicate the failure. Otherwise, the generated
|
|
or cached data is returned as a dictionary.
|
|
"""
|
|
|
|
existing_cache = cache(subsection)
|
|
ondisk_mtime = os.path.getmtime(filename)
|
|
|
|
entry = existing_cache.get(title)
|
|
if entry:
|
|
cached_mtime = entry.get("mtime", 0)
|
|
if ondisk_mtime > cached_mtime:
|
|
entry = None
|
|
|
|
if not entry or 'value' not in entry:
|
|
value = func()
|
|
if value is None:
|
|
return None
|
|
|
|
entry = {'mtime': ondisk_mtime, 'value': value}
|
|
existing_cache[title] = entry
|
|
|
|
dump_cache()
|
|
|
|
return entry['value']
|