superset thumbnails 源码
superset thumbnails 代码
文件路径：/superset/tasks/thumbnails.py
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# distributed with this work for additional information
# regarding copyright ownership. The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
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# KIND, either express or implied. See the License for the
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"""Utility functions used across Superset"""
import logging
from typing import Optional
from flask import current_app
from superset import security_manager, thumbnail_cache
from superset.extensions import celery_app
from superset.utils.celery import session_scope
from superset.utils.screenshots import ChartScreenshot, DashboardScreenshot
from superset.utils.webdriver import WindowSize
logger = logging.getLogger(__name__)
@celery_app.task(name="cache_chart_thumbnail", soft_time_limit=300)
def cache_chart_thumbnail(
url: str,
digest: str,
force: bool = False,
window_size: Optional[WindowSize] = None,
thumb_size: Optional[WindowSize] = None,
) -> None:
if not thumbnail_cache:
logger.warning("No cache set, refusing to compute")
return None
logger.info("Caching chart: %s", url)
screenshot = ChartScreenshot(url, digest)
with session_scope(nullpool=True) as session:
user = security_manager.get_user_by_username(
current_app.config["THUMBNAIL_SELENIUM_USER"], session=session
)
screenshot.compute_and_cache(
user=user,
cache=thumbnail_cache,
force=force,
window_size=window_size,
thumb_size=thumb_size,
)
return None
@celery_app.task(name="cache_dashboard_thumbnail", soft_time_limit=300)
def cache_dashboard_thumbnail(
url: str, digest: str, force: bool = False, thumb_size: Optional[WindowSize] = None
) -> None:
if not thumbnail_cache:
logging.warning("No cache set, refusing to compute")
return
logger.info("Caching dashboard: %s", url)
screenshot = DashboardScreenshot(url, digest)
with session_scope(nullpool=True) as session:
user = security_manager.get_user_by_username(
current_app.config["THUMBNAIL_SELENIUM_USER"], session=session
)
screenshot.compute_and_cache(
user=user,
cache=thumbnail_cache,
force=force,
thumb_size=thumb_size,
)
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