5b706c969d
- CommitQueue<T>: channel-based queue for committed entries awaiting state machine application - RaftPeerState: tracks replication and health state (nextIndex, matchIndex, lastContact) - RaftNode: CommitIndex/ProcessedIndex tracking, election timer with randomized 150-300ms interval, peer state integration with heartbeat and replication updates - 52 new tests across RaftApplyQueueTests, RaftElectionTimerTests, RaftHealthTests
47 lines
1.5 KiB
C#
47 lines
1.5 KiB
C#
namespace NATS.Server.Raft;
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/// <summary>
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/// Tracks replication and health state for a single RAFT peer.
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/// Go reference: raft.go peer tracking fields (nextIndex, matchIndex, last contact).
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/// </summary>
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public sealed class RaftPeerState
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{
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/// <summary>
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/// The peer's unique node identifier.
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/// </summary>
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public required string PeerId { get; init; }
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/// <summary>
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/// The next log index to send to this peer (leader use only).
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/// </summary>
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public long NextIndex { get; set; } = 1;
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/// <summary>
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/// The highest log index known to be replicated on this peer.
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/// </summary>
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public long MatchIndex { get; set; }
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/// <summary>
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/// Timestamp of the last successful communication with this peer.
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/// </summary>
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public DateTime LastContact { get; set; } = DateTime.UtcNow;
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/// <summary>
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/// Whether this peer is considered active in the cluster.
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/// </summary>
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public bool Active { get; set; } = true;
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/// <summary>
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/// Returns true if this peer has been contacted within the election timeout window.
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/// Go reference: raft.go isCurrent check.
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/// </summary>
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public bool IsCurrent(TimeSpan electionTimeout)
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=> DateTime.UtcNow - LastContact < electionTimeout;
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/// <summary>
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/// Returns true if this peer is both active and has been contacted within the health threshold.
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/// </summary>
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public bool IsHealthy(TimeSpan healthThreshold)
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=> Active && DateTime.UtcNow - LastContact < healthThreshold;
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}
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