ad1c9d011c
Implements the atomic alias swap step (plan §13.1 step 5) for online resharding. This is the cutover phase where the alias flips from the live index to the shadow index, stopping dual-write. Changes: - Add task_store field to ReshardExecutor and implement alias_swap() function using alias_swap_phase() - Add AliasSwapFailed variant to MiroirError - Add Serialize derive to AliasSwapResult for logging/metrics - Create integration test suite (p5_1_e_reshard_alias_swap.rs) covering: - Atomic alias flip to shadow index - History recording for rollback capability - Error cases (nonexistent alias, multi-target alias) - History retention limits - Idempotency The executor now properly performs the alias flip via task_store.flip_alias(), which atomically updates the alias target and records history for rollback. After this phase, client writes target ONLY the new index. Closes: miroir-uhj.1.5 Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
113 lines
2.8 KiB
Rust
113 lines
2.8 KiB
Rust
//! Error types for Miroir.
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use thiserror::Error;
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/// Result type alias for Miroir operations.
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pub type Result<T> = std::result::Result<T, MiroirError>;
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/// Core error type for Miroir.
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#[derive(Error, Debug)]
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pub enum MiroirError {
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/// Configuration error.
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#[error("configuration error: {0}")]
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Config(String),
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/// Topology error.
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#[error("topology error: {0}")]
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Topology(String),
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/// Routing error.
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#[error("routing error: {0}")]
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Routing(String),
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/// Merge error.
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#[error("merge error: {0}")]
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Merge(String),
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/// Task registry error.
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#[error("task error: {0}")]
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Task(String),
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/// Task store error.
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#[error("task store error: {0}")]
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TaskStore(String),
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/// IO error.
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#[error("IO error: {0}")]
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Io(#[from] std::io::Error),
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/// JSON serialization/deserialization error.
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#[error("JSON error: {0}")]
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Json(#[from] serde_json::Error),
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/// SQLite error.
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#[error("SQLite error: {0}")]
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Sqlite(#[from] rusqlite::Error),
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/// Redis error.
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#[error("Redis error: {0}")]
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Redis(String),
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/// Schema version mismatch.
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#[error("schema version {store_version} is ahead of binary version {binary_version}; cannot safely start. Restore from backup or upgrade binary.")]
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SchemaVersionAhead {
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store_version: i64,
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binary_version: i64,
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},
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/// Migration error.
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#[error("migration error: {0}")]
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Migration(String),
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/// Not found error.
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#[error("{0} not found")]
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NotFound(String),
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/// Invalid state error.
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#[error("invalid state: {0}")]
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InvalidState(String),
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/// Invalid request error.
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#[error("invalid request: {0}")]
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InvalidRequest(String),
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/// Idempotency key already used with different body.
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#[error("idempotency key reused with different body")]
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IdempotencyKeyReused,
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/// Too many pending queries.
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#[error("too many pending queries")]
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TooManyPendingQueries,
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/// Multi-target alias is not writable.
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#[error("multi-target alias is not writable")]
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MultiAliasNotWritable,
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/// Settings divergence detected.
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#[error("settings divergence detected across nodes")]
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SettingsDivergence,
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/// Settings version stale.
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#[error("settings version stale")]
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SettingsVersionStale,
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/// Tenant not allowed.
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#[error("tenant '{tenant}' not allowed: {reason}")]
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TenantNotAllowed { tenant: String, reason: String },
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/// Discovery error.
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#[error("discovery error: {0}")]
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Discovery(String),
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/// Anti-entropy error.
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#[error("anti-entropy error: {0}")]
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AntiEntropy(String),
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/// Verification error (for resharding cross-index verification).
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#[error("verification failed: {0}")]
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VerificationFailed(String),
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/// Alias swap error (for resharding alias swap phase).
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#[error("alias swap failed: {0}")]
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AliasSwapFailed(String),
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}
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