Pulp

Content Unit Creator - Downloads and creates objects

• Process content units in slices to limit the number of in-memory objects
• Determine which content units are already present in Pulp
• For immediate download policy, determine which artifacts in a slice are already present in Pulp.
• For immediate download policy, download all artifacts for each content unit.
• For immediate download policy, save new Content, Content Artifacts, Deferred Artifacts, and Artifacts to the db after downloading all artifacts.
• For deferred download policy, save new Content, Content Artifacts, and Deferred Artifacts to the database.
• Handle race conditions for db around writes to the database.
• 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

Synchronous Downloader - download a single file synchronously

• 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