[SLIDER-965] RoleHistory to (carefully) share RoleStatus instances with AppState

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: Slider 0.90.2
• Fix Version/s: Slider 0.90.2
• Component/s: appmaster
• Sprint: Slider September #1
• Assignee: Steve Loughran
• Reporter: Steve Loughran
• Created: 06/Nov/15 17:55
• Updated: 06/Nov/15 23:29
• Resolved: 06/Nov/15 17:59

Description

Move the RoleHistory beyond simple read-time ProviderRole information, to sharing the map of RoleStatus entries with AppState.

This involves improving the concurrency of the class. The plan is to move all integer counters in RoleState into the atomic LongGauge fields, with some downcoversion to integers at the last moment possible.