[MESOS-5260] Extend the uri::Fetcher::Plugin interface to include a "fetchSize"

• Type: Task
• Status: Accepted
• Priority: Major
• Resolution: Unresolved
• Component/s: fetcher
• Labels: fetcher mesosphere
• Epic Link: URI Fetcher
• Story Points: 2
• Assignee: Unassigned
• Reporter: Joseph Wu
• Shepherd: Jie Yu
• Created: 22/Apr/16 23:42
• Updated: 03/Aug/17 23:11

Description

In order to replace the mesos-fetcher binary with the uri::Fetcher, each plugin must be able to determine/estimate the size of a download. This is used by the Fetcher cache when it creates cache entries and such.

The logic for each of the four {{Fetcher::Plugin}}s can be taken and refactored from the existing fetcher.
https://github.com/apache/mesos/blob/653eca74f1080f5f55cd5092423506163e65d402/src/slave/containerizer/fetcher.cpp#L267

Issue Links

• blocks: MESOS-5259 Refactor the mesos-fetcher binary to use the uri::Fetcher as a backend