recovery.rs•22.6 kB
#![allow(dead_code, unused_variables, unused_imports)]
use chrono::{DateTime, Utc};
use codegraph_core::{CodeGraphError, NodeId, Result, SnapshotId, TransactionId};
use parking_lot::RwLock;
use serde::{Deserialize, Serialize};
use sha2::Digest;
use std::{
collections::HashMap,
path::{Path, PathBuf},
sync::Arc,
time::Duration,
};
use tokio::{
fs, task,
time::{interval, timeout},
};
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct IntegrityReport {
pub timestamp: DateTime<Utc>,
pub issues: Vec<IntegrityIssue>,
pub corrupted_data_count: usize,
pub orphaned_snapshots: Vec<SnapshotId>,
pub missing_content_hashes: Vec<String>,
pub checksum_mismatches: Vec<ChecksumMismatch>,
}
#[derive(Debug, Clone, Serialize, Deserialize)]
pub enum IntegrityIssue {
CorruptedTransaction {
transaction_id: TransactionId,
error: String,
},
OrphanedSnapshot {
snapshot_id: SnapshotId,
reason: String,
},
MissingContent {
content_hash: String,
referenced_by: Vec<NodeId>,
},
InvalidChecksum {
content_hash: String,
expected: String,
actual: String,
},
InconsistentWriteSet {
transaction_id: TransactionId,
node_id: NodeId,
details: String,
},
}
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct ChecksumMismatch {
pub content_hash: String,
pub expected_checksum: String,
pub actual_checksum: String,
pub size: u64,
}
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct RecoveryPlan {
pub timestamp: DateTime<Utc>,
pub actions: Vec<RecoveryAction>,
pub estimated_duration: Duration,
pub data_loss_risk: RiskLevel,
}
#[derive(Debug, Clone, Serialize, Deserialize)]
pub enum RecoveryAction {
ReplayTransaction {
transaction_id: TransactionId,
from_wal_sequence: u64,
},
RebuildSnapshot {
snapshot_id: SnapshotId,
from_transactions: Vec<TransactionId>,
},
RepairContent {
content_hash: String,
repair_strategy: ContentRepairStrategy,
},
RemoveOrphanedData {
data_type: String,
identifiers: Vec<String>,
},
RecomputeChecksum {
content_hash: String,
},
}
#[derive(Debug, Clone, Copy, Serialize, Deserialize)]
pub enum RiskLevel {
Low,
Medium,
High,
Critical,
}
#[derive(Debug, Clone, Serialize, Deserialize)]
pub enum ContentRepairStrategy {
RecreateFromSource { source_path: PathBuf },
RecomputeFromNodes { node_ids: Vec<NodeId> },
RestoreFromBackup { backup_timestamp: DateTime<Utc> },
MarkAsCorrupted,
}
pub struct RecoveryManager {
storage_path: PathBuf,
backup_path: PathBuf,
integrity_check_interval: Duration,
max_recovery_attempts: u32,
recovery_state: Arc<RwLock<RecoveryState>>,
}
#[derive(Debug, Default)]
struct RecoveryState {
last_integrity_check: Option<DateTime<Utc>>,
recovery_in_progress: bool,
failed_recovery_attempts: u32,
quarantined_data: HashMap<String, QuarantineReason>,
}
#[derive(Debug, Clone, Serialize, Deserialize)]
enum QuarantineReason {
CorruptedContent,
IntegrityFailure,
ChecksumMismatch,
UnrecoverableError(String),
}
impl RecoveryManager {
pub fn new<P: AsRef<Path>>(storage_path: P, backup_path: P) -> Self {
Self {
storage_path: storage_path.as_ref().to_path_buf(),
backup_path: backup_path.as_ref().to_path_buf(),
integrity_check_interval: Duration::from_secs(3600), // 1 hour
max_recovery_attempts: 3,
recovery_state: Arc::new(RwLock::new(RecoveryState::default())),
}
}
pub async fn start_background_integrity_checks(&self) -> Result<()> {
let storage_path = self.storage_path.clone();
let state = self.recovery_state.clone();
let check_interval = self.integrity_check_interval;
task::spawn(async move {
let mut interval = interval(check_interval);
loop {
interval.tick().await;
let backup = std::path::PathBuf::from("/tmp/backup");
let recovery_manager = RecoveryManager::new(&storage_path, &backup);
match recovery_manager.run_integrity_check().await {
Ok(report) => {
if !report.issues.is_empty() {
tracing::warn!("Integrity check found {} issues", report.issues.len());
// Attempt automatic repair for low-risk issues
if let Ok(plan) = recovery_manager.create_recovery_plan(&report).await {
if matches!(plan.data_loss_risk, RiskLevel::Low) {
if let Err(e) =
recovery_manager.execute_recovery_plan(plan).await
{
tracing::error!("Automatic recovery failed: {}", e);
}
}
}
}
let mut state = state.write();
state.last_integrity_check = Some(Utc::now());
}
Err(e) => {
tracing::error!("Integrity check failed: {}", e);
}
}
}
});
Ok(())
}
pub async fn run_integrity_check(&self) -> Result<IntegrityReport> {
let start_time = Utc::now();
let mut issues = Vec::new();
let mut corrupted_data_count = 0;
let mut orphaned_snapshots = Vec::new();
let mut missing_content_hashes = Vec::new();
let mut checksum_mismatches = Vec::new();
// Check transaction consistency
if let Err(e) = self.check_transaction_consistency(&mut issues).await {
tracing::error!("Transaction consistency check failed: {}", e);
corrupted_data_count += 1;
}
// Check snapshot integrity
if let Err(e) = self
.check_snapshot_integrity(&mut issues, &mut orphaned_snapshots)
.await
{
tracing::error!("Snapshot integrity check failed: {}", e);
corrupted_data_count += 1;
}
// Check content store integrity
if let Err(e) = self
.check_content_store_integrity(
&mut issues,
&mut missing_content_hashes,
&mut checksum_mismatches,
)
.await
{
tracing::error!("Content store integrity check failed: {}", e);
corrupted_data_count += 1;
}
// Check WAL consistency
if let Err(e) = self.check_wal_consistency(&mut issues).await {
tracing::error!("WAL consistency check failed: {}", e);
corrupted_data_count += 1;
}
Ok(IntegrityReport {
timestamp: start_time,
issues,
corrupted_data_count,
orphaned_snapshots,
missing_content_hashes,
checksum_mismatches,
})
}
async fn check_transaction_consistency(&self, issues: &mut Vec<IntegrityIssue>) -> Result<()> {
// TODO: Implement transaction consistency checks
// - Verify that all transactions have valid states
// - Check that write sets are consistent
// - Validate transaction timestamps and dependencies
Ok(())
}
async fn check_snapshot_integrity(
&self,
issues: &mut Vec<IntegrityIssue>,
orphaned_snapshots: &mut Vec<SnapshotId>,
) -> Result<()> {
// TODO: Implement snapshot integrity checks
// - Verify that all snapshots reference valid content hashes
// - Check parent-child relationships
// - Identify orphaned snapshots
Ok(())
}
async fn check_content_store_integrity(
&self,
issues: &mut Vec<IntegrityIssue>,
missing_content: &mut Vec<String>,
checksum_mismatches: &mut Vec<ChecksumMismatch>,
) -> Result<()> {
// TODO: Implement content store integrity checks
// - Verify that all content hashes exist and are accessible
// - Recompute and verify checksums
// - Check for content corruption
Ok(())
}
async fn check_wal_consistency(&self, issues: &mut Vec<IntegrityIssue>) -> Result<()> {
// TODO: Implement WAL consistency checks
// - Verify sequence number continuity
// - Check that all WAL entries are readable
// - Validate transaction references
Ok(())
}
pub async fn create_recovery_plan(&self, report: &IntegrityReport) -> Result<RecoveryPlan> {
let mut actions = Vec::new();
let mut risk_level = RiskLevel::Low;
// Analyze issues and create recovery actions
for issue in &report.issues {
match issue {
IntegrityIssue::CorruptedTransaction { transaction_id, .. } => {
actions.push(RecoveryAction::ReplayTransaction {
transaction_id: *transaction_id,
from_wal_sequence: 0, // TODO: Determine correct sequence
});
risk_level = std::cmp::max(risk_level as u8, RiskLevel::Medium as u8).into();
}
IntegrityIssue::OrphanedSnapshot { snapshot_id, .. } => {
actions.push(RecoveryAction::RemoveOrphanedData {
data_type: "snapshot".to_string(),
identifiers: vec![snapshot_id.to_string()],
});
}
IntegrityIssue::MissingContent {
content_hash,
referenced_by,
} => {
actions.push(RecoveryAction::RepairContent {
content_hash: content_hash.clone(),
repair_strategy: if referenced_by.len() > 1 {
ContentRepairStrategy::RecomputeFromNodes {
node_ids: referenced_by.clone(),
}
} else {
ContentRepairStrategy::MarkAsCorrupted
},
});
risk_level = std::cmp::max(risk_level as u8, RiskLevel::High as u8).into();
}
IntegrityIssue::InvalidChecksum { content_hash, .. } => {
actions.push(RecoveryAction::RecomputeChecksum {
content_hash: content_hash.clone(),
});
}
IntegrityIssue::InconsistentWriteSet { transaction_id, .. } => {
actions.push(RecoveryAction::ReplayTransaction {
transaction_id: *transaction_id,
from_wal_sequence: 0,
});
risk_level = std::cmp::max(risk_level as u8, RiskLevel::Medium as u8).into();
}
}
}
// Estimate duration based on number of actions and their complexity
let estimated_duration = Duration::from_secs(
(actions.len() as u64) * 10 + // Base time per action
report.corrupted_data_count as u64 * 30, // Extra time for corruption
);
Ok(RecoveryPlan {
timestamp: Utc::now(),
actions,
estimated_duration,
data_loss_risk: risk_level,
})
}
pub async fn execute_recovery_plan(&self, plan: RecoveryPlan) -> Result<()> {
{
let mut state = self.recovery_state.write();
if state.recovery_in_progress {
return Err(CodeGraphError::Database(
"Recovery already in progress".to_string(),
));
}
state.recovery_in_progress = true;
}
tracing::info!("Starting recovery with {} actions", plan.actions.len());
let result = self.execute_recovery_actions(plan.actions).await;
{
let mut state = self.recovery_state.write();
state.recovery_in_progress = false;
match &result {
Ok(_) => {
state.failed_recovery_attempts = 0;
tracing::info!("Recovery completed successfully");
}
Err(e) => {
state.failed_recovery_attempts += 1;
tracing::error!("Recovery failed: {}", e);
}
}
}
result
}
async fn execute_recovery_actions(&self, actions: Vec<RecoveryAction>) -> Result<()> {
for (i, action) in actions.iter().enumerate() {
tracing::info!(
"Executing recovery action {}/{}: {:?}",
i + 1,
actions.len(),
action
);
let action_result = timeout(
Duration::from_secs(300), // 5 minute timeout per action
self.execute_single_action(action),
)
.await;
match action_result {
Ok(Ok(())) => {
tracing::debug!("Recovery action completed successfully");
}
Ok(Err(e)) => {
tracing::error!("Recovery action failed: {}", e);
return Err(e);
}
Err(_) => {
tracing::error!("Recovery action timed out");
return Err(CodeGraphError::Database(
"Recovery action timeout".to_string(),
));
}
}
}
Ok(())
}
async fn execute_single_action(&self, action: &RecoveryAction) -> Result<()> {
match action {
RecoveryAction::ReplayTransaction {
transaction_id,
from_wal_sequence,
} => {
self.replay_transaction(*transaction_id, *from_wal_sequence)
.await
}
RecoveryAction::RebuildSnapshot {
snapshot_id,
from_transactions,
} => self.rebuild_snapshot(*snapshot_id, from_transactions).await,
RecoveryAction::RepairContent {
content_hash,
repair_strategy,
} => self.repair_content(content_hash, repair_strategy).await,
RecoveryAction::RemoveOrphanedData {
data_type,
identifiers,
} => self.remove_orphaned_data(data_type, identifiers).await,
RecoveryAction::RecomputeChecksum { content_hash } => {
self.recompute_checksum(content_hash).await
}
}
}
async fn replay_transaction(
&self,
_transaction_id: TransactionId,
_from_sequence: u64,
) -> Result<()> {
// TODO: Implement transaction replay
// 1. Load WAL entries for the transaction
// 2. Re-apply operations in order
// 3. Update transaction status
Ok(())
}
async fn rebuild_snapshot(
&self,
_snapshot_id: SnapshotId,
_from_transactions: &[TransactionId],
) -> Result<()> {
// TODO: Implement snapshot rebuilding
// 1. Collect all relevant transactions
// 2. Apply changes in chronological order
// 3. Create new snapshot with corrected state
Ok(())
}
async fn repair_content(
&self,
content_hash: &str,
strategy: &ContentRepairStrategy,
) -> Result<()> {
match strategy {
ContentRepairStrategy::RecreateFromSource { source_path } => {
// TODO: Read original source and recompute content
let _content = fs::read(source_path).await.map_err(|e| {
CodeGraphError::Database(format!("Failed to read source: {}", e))
})?;
// Verify hash matches
// Store repaired content
}
ContentRepairStrategy::RecomputeFromNodes { node_ids: _ } => {
// TODO: Recompute content from node data
}
ContentRepairStrategy::RestoreFromBackup {
backup_timestamp: _,
} => {
// TODO: Restore from backup
}
ContentRepairStrategy::MarkAsCorrupted => {
self.quarantine_content(content_hash, QuarantineReason::CorruptedContent)
.await?;
}
}
Ok(())
}
async fn remove_orphaned_data(&self, _data_type: &str, _identifiers: &[String]) -> Result<()> {
// TODO: Implement orphaned data removal
// Be very careful to not remove data that might still be referenced
Ok(())
}
async fn recompute_checksum(&self, _content_hash: &str) -> Result<()> {
// TODO: Recompute and update checksum
// 1. Read content data
// 2. Compute new checksum
// 3. Update metadata if different
Ok(())
}
async fn quarantine_content(&self, content_hash: &str, reason: QuarantineReason) -> Result<()> {
let mut state = self.recovery_state.write();
state
.quarantined_data
.insert(content_hash.to_string(), reason.clone());
tracing::warn!("Content {} quarantined: {:?}", content_hash, reason);
Ok(())
}
pub async fn create_backup(&self) -> Result<PathBuf> {
let timestamp = Utc::now().format("%Y%m%d_%H%M%S");
let backup_dir = self.backup_path.join(format!("backup_{}", timestamp));
fs::create_dir_all(&backup_dir)
.await
.map_err(|e| CodeGraphError::Database(format!("Failed to create backup dir: {}", e)))?;
// TODO: Implement proper backup creation
// 1. Create consistent snapshot of all data
// 2. Copy to backup directory
// 3. Create manifest with checksums
// 4. Verify backup integrity
tracing::info!("Backup created at: {}", backup_dir.display());
Ok(backup_dir)
}
pub async fn restore_from_backup<P: AsRef<Path>>(&self, backup_path: P) -> Result<()> {
let backup_path = backup_path.as_ref();
if !backup_path.exists() {
return Err(CodeGraphError::Database(
"Backup path does not exist".to_string(),
));
}
// TODO: Implement backup restoration
// 1. Verify backup integrity
// 2. Stop all operations
// 3. Replace current data with backup
// 4. Restart services
tracing::info!("Restored from backup: {}", backup_path.display());
Ok(())
}
pub async fn verify_backup<P: AsRef<Path>>(&self, backup_path: P) -> Result<bool> {
let backup_path = backup_path.as_ref();
// TODO: Implement backup verification
// 1. Check manifest file exists
// 2. Verify all files listed in manifest
// 3. Validate checksums
// 4. Check for completeness
Ok(backup_path.exists())
}
pub fn get_recovery_statistics(&self) -> RecoveryStatistics {
let state = self.recovery_state.read();
RecoveryStatistics {
last_integrity_check: state.last_integrity_check,
recovery_in_progress: state.recovery_in_progress,
failed_recovery_attempts: state.failed_recovery_attempts,
quarantined_items: state.quarantined_data.len(),
}
}
}
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct RecoveryStatistics {
pub last_integrity_check: Option<DateTime<Utc>>,
pub recovery_in_progress: bool,
pub failed_recovery_attempts: u32,
pub quarantined_items: usize,
}
impl From<u8> for RiskLevel {
fn from(value: u8) -> Self {
match value {
0 => RiskLevel::Low,
1 => RiskLevel::Medium,
2 => RiskLevel::High,
_ => RiskLevel::Critical,
}
}
}
#[cfg(test)]
mod tests {
use super::*;
use tempfile::tempdir;
#[tokio::test]
async fn test_recovery_manager_creation() {
let temp_dir = tempdir().unwrap();
let storage_path = temp_dir.path().join("storage");
let backup_path = temp_dir.path().join("backup");
let recovery_manager = RecoveryManager::new(&storage_path, &backup_path);
assert_eq!(recovery_manager.storage_path, storage_path);
assert_eq!(recovery_manager.backup_path, backup_path);
assert_eq!(recovery_manager.max_recovery_attempts, 3);
}
#[tokio::test]
async fn test_integrity_check() {
let temp_dir = tempdir().unwrap();
let recovery_manager = RecoveryManager::new(
temp_dir.path().join("storage"),
temp_dir.path().join("backup"),
);
let report = recovery_manager.run_integrity_check().await.unwrap();
// For empty/new storage, should have no issues
assert_eq!(report.issues.len(), 0);
assert_eq!(report.corrupted_data_count, 0);
}
#[tokio::test]
async fn test_recovery_plan_creation() {
let temp_dir = tempdir().unwrap();
let recovery_manager = RecoveryManager::new(
temp_dir.path().join("storage"),
temp_dir.path().join("backup"),
);
let report = IntegrityReport {
timestamp: Utc::now(),
issues: vec![IntegrityIssue::InvalidChecksum {
content_hash: "test_hash".to_string(),
expected: "expected".to_string(),
actual: "actual".to_string(),
}],
corrupted_data_count: 1,
orphaned_snapshots: vec![],
missing_content_hashes: vec![],
checksum_mismatches: vec![],
};
let plan = recovery_manager
.create_recovery_plan(&report)
.await
.unwrap();
assert_eq!(plan.actions.len(), 1);
assert!(matches!(plan.data_loss_risk, RiskLevel::Low));
match &plan.actions[0] {
RecoveryAction::RecomputeChecksum { content_hash } => {
assert_eq!(content_hash, "test_hash");
}
_ => panic!("Expected RecomputeChecksum action"),
}
}
}