[HELIX-524] add getProgress() to Task interface

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 0.6.4
• Fix Version/s: 0.6.x
• Component/s: helix-core
• Assignee: Unassigned
• Reporter: Hongbo Zeng
• Created: 01/Oct/14 01:14
• Updated: 20/Sep/17 21:53

Description

Add a getProgress to the Task interface, this is very helpful for long running tasks, from which we know the status of a task and see if it's blocked. The return value is a double, ranging from 0 to 1.0, 1.0 indicates a task is finished