bvandeusen
d3bb8c509a
scan_directory walks ImportSettings.import_scan_path, creates an ImportBatch, enumerates supported files into ImportTasks, and enqueues import_media_file per task. import_media_file moves the task through its state machine (pending → queued → processing → complete/skipped/failed), updates ImportBatch counters atomically (UPDATE ... SET col = col + 1), enqueues a thumbnail task on success, and marks the batch complete when the last task drains. generate_thumbnail runs on its own queue (thumbnail) so big imports don't starve thumbnail throughput; failure here is logged and does not fail the import. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
51 lines
1.8 KiB
Python
51 lines
1.8 KiB
Python
"""generate_thumbnail task: PIL/ffmpeg thumbnail generation on the thumbnail queue.
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Lives separately from import_file because thumbnails can be regenerated en
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masse (FC-2c adds the 'regenerate all' admin action) and they're CPU-bound
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so they deserve their own queue lane.
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"""
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from pathlib import Path
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from sqlalchemy import create_engine
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from sqlalchemy.orm import sessionmaker
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from ..celery_app import celery
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from ..config import get_config
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from ..models import ImageRecord
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from ..services.importer import is_video
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from ..services.thumbnailer import Thumbnailer
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IMAGES_ROOT = Path("/images")
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def _sync_session_factory():
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cfg = get_config()
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engine = create_engine(cfg.database_url_sync, future=True, pool_pre_ping=True)
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return sessionmaker(engine, expire_on_commit=False)
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@celery.task(name="backend.app.tasks.thumbnail.generate_thumbnail", bind=True)
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def generate_thumbnail(self, image_id: int) -> dict:
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SessionLocal = _sync_session_factory()
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with SessionLocal() as session:
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record = session.get(ImageRecord, image_id)
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if record is None:
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return {"status": "missing", "image_id": image_id}
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thumbnailer = Thumbnailer(images_root=IMAGES_ROOT)
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source = Path(record.path)
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try:
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if is_video(source):
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result = thumbnailer.generate_video_thumbnail(source, record.sha256)
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else:
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result = thumbnailer.generate_image_thumbnail(source, record.sha256)
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except Exception as exc: # pragma: no cover — thumbnail failure is non-fatal
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return {"status": "failed", "image_id": image_id, "error": f"{type(exc).__name__}: {exc}"}
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record.thumbnail_path = str(result.path)
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session.add(record)
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session.commit()
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return {"status": "ok", "image_id": image_id, "path": str(result.path)}
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