Struct TransactionManager 

pub struct TransactionManager { /* private fields */ }

👎Deprecated since 0.1.0:

Use MvccTransactionManager from wal_integration for production workloads with durability

Transaction manager for MVCC (snapshot-only, no WAL durability)

Deprecation Notice

This implementation is deprecated for production use. It provides snapshot isolation but does NOT include WAL integration for crash recovery.

Migration Guide

For production workloads requiring durability, use MvccTransactionManager from sochdb_storage::wal_integration which includes:

• Write-ahead logging for crash recovery
• Serializable Snapshot Isolation (SSI)
• Group commit for high throughput
• Event-driven async architecture

When to Use This Implementation

• Unit testing without durability overhead
• Ephemeral in-memory operations
• Prototyping snapshot isolation logic

See Also

• crate::wal_integration::MvccTransactionManager - Production transaction manager
• crate::transaction::TransactionCoordinator - Unified transaction trait

Implementations

impl TransactionManager

pub fn new() -> Self

Create a new transaction manager

pub fn begin(&self) -> (TxnId, Timestamp)

Begin a new transaction

pub fn acquire_snapshot(&self, txn_id: TxnId) -> Snapshot

Acquire a read snapshot

pub fn commit(&self, txn_id: TxnId) -> Option<Timestamp>

Commit a transaction

pub fn abort(&self, txn_id: TxnId) -> bool

Abort a transaction

pub fn get_status(&self, txn_id: TxnId) -> Option<TxnStatus>

Get transaction status

pub fn get_commit_ts(&self, txn_id: TxnId) -> Option<Timestamp>

Get commit timestamp for a transaction

pub fn min_active_txn_id(&self) -> TxnId

Get minimum active transaction ID (for garbage collection)

pub fn current_timestamp(&self) -> Timestamp

Get current timestamp

pub fn gc(&self, watermark: Timestamp) -> usize

Garbage collect old transaction records

Removes committed transactions older than the watermark.

Trait Implementations

impl Default for TransactionManager

fn default() -> Self

Returns the “default value” for a type.