[BOOKKEEPER-756] Use HashedwheelTimer for request timeouts for PCBC

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 4.3.0
• Component/s: bookkeeper-client
• Assignee: Sijie Guo
• Reporter: Sijie Guo
• Created: 12/May/14 04:18
• Updated: 29/May/14 07:39
• Resolved: 29/May/14 07:39

Description

Current scheduler based timeout mechanism is per batch, which isn't efficient. HashedWheelTimer is much better for timeouts. So change the PCBC to use HashedWheelTimer for timeouts.

Besides that HashedWheelTimer change, it also provides multiple channel per bookie support for latency consideration.