Pulp

Content Unit Creator - Downloads and creates objects

• Saves all necessary units to the db after downloading all artifacts
• Race condition handling for db around object creation
• Transactional support around unit creation to ensure always creating a complete content unit or none

open questions: should this associate each unit as its made?

Content Unit Downloader - Parallelized downloads, but it emits a content unit only when all files are downloaded

• manages the asyncio loop for you
• abstracts the collecting of downloads for a given content unit
• driven by a simple loop

Concurrent Downloader - Downloads any number of artifacts in parallel

• provides digest and size validation
• yields a file that is written to a temp area and all digests which were computed during download
• you provide the asyncio loop
• constrains the number of connections
• share resources such as sessions,connection pools and auth tokens

Syncronous Downloader - download a single file synchornously

• blocking call so one download at a time
• provides digest and size validation
• yields a file that is written to a temp area and all digests which were computed during download