heliosdb-nano 3.37.2

PostgreSQL-compatible embedded database with TDE + ZKE encryption, HNSW vector search, Product Quantization, git-like branching, time-travel queries, materialized views, row-level security, and 50+ enterprise features
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146

//! High Availability Replication Module
//!
//! Implements Tier 1 HA for HeliosDB-Nano:
//! - Tier 1: Warm Standby (Active-Passive WAL streaming)
//!
//! # Feature Flags
//!
//! - `ha-tier1`: Warm standby replication

pub mod config;

// HA State Registry (available for all HA features)
#[cfg(feature = "ha-tier1")]
pub mod ha_state;
#[cfg(feature = "ha-tier1")]
pub use ha_state::{ha_state, HARole, HAStateRegistry, NodeConfig, PrimaryInfo, StandbyInfo, SyncMode};

// Tier 1: Warm Standby (ha-tier1)
#[cfg(feature = "ha-tier1")]
pub mod failover_watcher;
#[cfg(feature = "ha-tier1")]
pub mod logical_replication;
#[cfg(feature = "ha-tier1")]
pub mod lsn_manager;
#[cfg(feature = "ha-tier1")]
pub mod query_forwarder;
#[cfg(feature = "ha-tier1")]
pub mod split_brain;
#[cfg(feature = "ha-tier1")]
pub mod streaming;
#[cfg(feature = "ha-tier1")]
pub mod transport;
#[cfg(feature = "ha-tier1")]
pub mod wal_applicator;
#[cfg(feature = "ha-tier1")]
pub mod wal_replicator;
#[cfg(feature = "ha-tier1")]
pub mod wal_store;

// Controlled Switchover (ha-tier1)
#[cfg(feature = "ha-tier1")]
pub mod role_manager;
#[cfg(feature = "ha-tier1")]
pub mod switchover;
#[cfg(feature = "ha-tier1")]
pub mod topology;
#[cfg(feature = "ha-tier1")]
pub use role_manager::{NodeRole, RoleChangeEvent, RoleChangeReason, RoleManager, SwitchoverPhase};
#[cfg(feature = "ha-tier1")]
pub use switchover::{SwitchoverCheck, SwitchoverConfig, SwitchoverCoordinator, SwitchoverEvent};
#[cfg(feature = "ha-tier1")]
pub use topology::{topology_manager, ClusterSummary, NodeInfo, TopologyEvent, TopologyManager};

// Re-exports for convenience
pub use config::*;

#[cfg(feature = "ha-tier1")]
pub use failover_watcher::{
    AutomaticFailoverBuilder, AutomaticFailoverCoordinator, FailoverCandidate, FailoverEvent, FailoverWatcher,
    HealthCheckResult,
};
#[cfg(feature = "ha-tier1")]
pub use logical_replication::{
    ChangeEvent, ChangeOperation, ChangeRow, ColumnMapping, ColumnTransform, FieldValue, LogicalReplicationConfig,
    LogicalReplicationPipeline, RowFilter, TableFilter,
};
#[cfg(feature = "ha-tier1")]
pub use lsn_manager::LsnManager;
#[cfg(feature = "ha-tier1")]
pub use query_forwarder::{
    init_query_forwarder, query_forwarder, ColumnInfo, ForwardedResult, ForwarderError, QueryForwarder,
};
#[cfg(feature = "ha-tier1")]
pub use split_brain::{
    ClusterNode, ObserverConfig, ObserverNode, ProtectionEvent, ProtectionState, SplitBrainProtector,
};
#[cfg(feature = "ha-tier1")]
pub use streaming::{
    StreamingClient, StreamingClientConfig, StreamingClientState, StreamingServer, StreamingServerConfig,
};
#[cfg(feature = "ha-tier1")]
pub use transport::{
    AckType,
    Capabilities,
    HealthStatus,
    MessageType,
    NodeRole as WireNodeRole, // Renamed to avoid conflict with role_manager::NodeRole
    ReplicationConnection,
    ReplicationServer,
    SyncModeConfig,
};
#[cfg(feature = "ha-tier1")]
pub use wal_applicator::WalApplicator;
#[cfg(feature = "ha-tier1")]
pub use wal_replicator::{Lsn, WalReplicator};
#[cfg(feature = "ha-tier1")]
pub use wal_store::{BatchRequest, BatchResult, BatchStreamState, WalStore, WalStoreConfig};

use thiserror::Error;

/// Replication errors
#[derive(Debug, Error)]
pub enum ReplicationError {
    #[error("WAL streaming error: {0}")]
    WalStreaming(String),

    #[error("Failover error: {0}")]
    Failover(String),

    #[error("Network error: {0}")]
    Network(String),

    #[error("Authentication error: {0}")]
    Authentication(String),

    #[error("Configuration error: {0}")]
    Configuration(String),

    #[error("LSN tracking error: {0}")]
    LsnTracking(String),

    #[error("Storage error: {0}")]
    Storage(String),

    #[error("Timeout: {0}")]
    Timeout(String),

    #[error("Internal error: {0}")]
    Internal(String),

    #[error("Transport error: {0}")]
    Transport(String),
}

pub type Result<T> = std::result::Result<T, ReplicationError>;

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn test_error_display() {
        let err = ReplicationError::WalStreaming("test error".to_string());
        assert!(err.to_string().contains("WAL streaming"));
    }
}