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mod alter_table;
mod error;
mod gc;
mod index;
mod index_mut;
mod index_sync;
mod key;
mod lock;
mod metadata;
mod snapshot;
mod store;
mod store_mut;
mod transaction;
pub use sled;
use {
self::snapshot::Snapshot,
error::{err_into, tx_err_into},
gluesql_core::{
data::Schema,
result::{Error, Result},
store::{GStore, GStoreMut},
},
sled::{
transaction::{
ConflictableTransactionError, ConflictableTransactionResult, TransactionalTree,
},
Config, Db, IVec,
},
};
const DEFAULT_TX_TIMEOUT: u128 = 3600 * 1000;
#[derive(Debug, Clone)]
pub enum State {
Idle,
Transaction {
txid: u64,
created_at: u128,
autocommit: bool,
},
}
#[derive(Debug, Clone)]
pub struct SledStorage {
pub tree: Db,
pub state: State,
pub tx_timeout: Option<u128>,
}
impl SledStorage {
pub fn new(filename: &str) -> Result<Self> {
let tree = sled::open(filename).map_err(err_into)?;
let state = State::Idle;
let tx_timeout = Some(DEFAULT_TX_TIMEOUT);
Ok(Self {
tree,
state,
tx_timeout,
})
}
pub fn set_transaction_timeout(&mut self, tx_timeout: Option<u128>) {
self.tx_timeout = tx_timeout;
}
fn update_state(self, state: State) -> Self {
Self {
tree: self.tree,
state,
tx_timeout: self.tx_timeout,
}
}
}
impl TryFrom<Config> for SledStorage {
type Error = Error;
fn try_from(config: Config) -> Result<Self> {
let tree = config.open().map_err(err_into)?;
let state = State::Idle;
let tx_timeout = Some(DEFAULT_TX_TIMEOUT);
Ok(Self {
tree,
state,
tx_timeout,
})
}
}
fn fetch_schema(
tree: &TransactionalTree,
table_name: &str,
) -> ConflictableTransactionResult<(String, Option<Snapshot<Schema>>), Error> {
let key = format!("schema/{}", table_name);
let value = tree.get(&key.as_bytes())?;
let schema_snapshot = value
.map(|v| bincode::deserialize(&v))
.transpose()
.map_err(err_into)
.map_err(ConflictableTransactionError::Abort)?;
Ok((key, schema_snapshot))
}
impl GStore<IVec> for SledStorage {}
impl GStoreMut<IVec> for SledStorage {}