[DROIDS-48] Support prioritizing in the TaskQueue

• Type: New Feature
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 0.1.0
• Component/s: core
• Assignee: Unassigned
• Reporter: Mingfai Ma
• Created: 19/Apr/09 11:17
• Updated: 22/Jun/09 04:52

Description

Use case:

• when looping a directory, (imagine someone is too stupid and dunno the dmoz database can be downloaded and try to crawl it with Droids) we got collect a lot of links that will be handled later. assume the requirement is to fetch dmoz directory +1 link outside dmoz.org, In the original mechanism, it will keep adding new links to the TaskQueue. Ideally, there should be a mechanism to give a higher priority to the non-dmoz.org links, so when non-dmoz links are added, they are processed first, and be removed from the TaskQueue asap.

with the patch in DROIDS-47, a constructor is added to the SimpleTaskQueue to support a custom Queue. This issue suggests to change the SimpleTaskQueue to use a PriorityBlockingQueue by default, and add a getWeight to the Task interface

I'm also thinking about a more complex TaskQueue. to be discussed in the mail list later.