databendlabs / openraft / 27147503550

87%

Build Type

push

github

Committed by drmingdrmer

Commit Message

refactor: make Membership implement QuorumSet directly

# Summary

The leader and progress layer previously derived its quorum set by converting
the effective `Membership` into a `Joint` via `to_quorum_set()`. `Membership`
now implements `QuorumSet` itself, as the joint of its voter configs, and the
leader holds the membership directly. Quorum decisions are unchanged.

# Details

- `Membership` implements `QuorumSet` in a dedicated module: `is_quorum`
  requires a majority in every config and `ids` returns the voter union, which
  reproduces the previous `Joint`-based behavior exactly.
- `LeaderQuorumSet` becomes `Arc<Membership<NodeId, Node>>` instead of
  `Joint<NodeId, ...>`. The leader, candidate, and progress-rebuild paths now
  wrap the effective membership in an `Arc` rather than calling
  `to_quorum_set()`. Using `Arc` keeps the progress clone on a membership
  change a refcount bump instead of copying node metadata.
- Removes the now-unused `Membership::to_quorum_set()`.
- Consequence: the previously id-only leader/progress quorum type now carries
  the node type `N`, since `Arc<Membership>` includes the node map that quorum
  logic itself does not read.

Coverage Stats

51 of 51 new or added lines in 4 files covered. (100.0%)

1 existing line in 1 file now uncovered.

16493 of 19029 relevant lines covered (86.67%)

144895.69 hits per line