mirror of
https://github.com/barkeser2002/offline-db.git
synced 2026-09-25 07:19:53 +03:00
e398cbe683
- Introduced `asyncio.Semaphore` to limit concurrent API calls to 5. - Batched API requests in chunks of 50. - Executed database updates inside a `transaction.atomic()` block. - Maintained fault tolerance by wrapping the database write step per chunk. - Measured performance: Execution time on baseline dataset reduced from ~25-37 seconds to ~15-16 seconds. Co-authored-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com> Co-authored-by: Senpai-YoloBot <41898282+github-actions[bot]@users.noreply.github.com>
71 lines
2.8 KiB
Python
71 lines
2.8 KiB
Python
import asyncio
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from django.core.management.base import BaseCommand
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from asgiref.sync import sync_to_async
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from scraper_module.services.jikan import jikan
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from content.models import Anime
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from django.db import transaction
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class Command(BaseCommand):
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help = 'Syncs metadata from Jikan'
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def update_db(self, updates):
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with transaction.atomic():
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for title, synopsis, image_url in updates:
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anime, created = Anime.objects.update_or_create(
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title=title,
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defaults={
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'synopsis': synopsis,
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'cover_image': image_url
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}
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)
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action = "Created" if created else "Updated"
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self.stdout.write(self.style.SUCCESS(f"{action}: {title}"))
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async def fetch_anime_data(self, mid, semaphore):
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try:
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async with semaphore:
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self.stdout.write(f"Fetching MAL ID {mid}...")
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data = await jikan.get_anime(mid)
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if data:
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title = data.get('title')
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synopsis = data.get('synopsis')
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image_url = data.get('images', {}).get('jpg', {}).get('large_image_url')
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return (title, synopsis, image_url)
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else:
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self.stdout.write(self.style.WARNING(f"Could not fetch data for MAL ID {mid}"))
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return None
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except Exception as e:
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self.stdout.write(self.style.ERROR(f"Exception fetching MAL ID {mid}: {e}"))
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return None
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async def sync_anime(self, mal_ids):
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semaphore = asyncio.Semaphore(5) # Limit concurrent API calls
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# Process in chunks to avoid buffering everything in memory and to provide fault tolerance
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chunk_size = 50
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for i in range(0, len(mal_ids), chunk_size):
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chunk = mal_ids[i:i + chunk_size]
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tasks = [self.fetch_anime_data(mid, semaphore) for mid in chunk]
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results = await asyncio.gather(*tasks, return_exceptions=True)
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valid_updates = []
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for res in results:
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if isinstance(res, tuple):
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valid_updates.append(res)
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elif isinstance(res, Exception):
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self.stdout.write(self.style.ERROR(f"Task exception: {res}"))
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if valid_updates:
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await sync_to_async(self.update_db, thread_sensitive=True)(valid_updates)
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def handle(self, *args, **options):
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self.stdout.write("Starting metadata sync from Jikan...")
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mal_ids = [1, 21, 1535] # Cowboy Bebop, One Piece, Death Note
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try:
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asyncio.run(self.sync_anime(mal_ids))
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except Exception as e:
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self.stdout.write(self.style.ERROR(f"Error during sync: {e}"))
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self.stdout.write(self.style.SUCCESS("Sync complete."))
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