2025-02-10 10:46:42 +01:00

85 lines
2.7 KiB
Rust

use meilisearch_types::heed::types::Str;
use meilisearch_types::heed::{self, Database, Env, RoTxn, RwTxn};
use meilisearch_types::milli::heed_codec::version::VersionCodec;
use meilisearch_types::versioning;
use crate::upgrade::upgrade_index_scheduler;
use crate::Result;
/// The number of database used by queue itself
const NUMBER_OF_DATABASES: u32 = 1;
/// Database const names for the `IndexScheduler`.
mod db_name {
pub const VERSION: &str = "version";
}
mod entry_name {
pub const MAIN: &str = "main";
}
#[derive(Clone)]
pub struct Versioning {
pub version: Database<Str, VersionCodec>,
}
impl Versioning {
pub const fn nb_db() -> u32 {
NUMBER_OF_DATABASES
}
pub fn get_version(&self, rtxn: &RoTxn) -> Result<Option<(u32, u32, u32)>, heed::Error> {
self.version.get(rtxn, entry_name::MAIN)
}
pub fn set_version(
&self,
wtxn: &mut RwTxn,
version: (u32, u32, u32),
) -> Result<(), heed::Error> {
self.version.put(wtxn, entry_name::MAIN, &version)
}
pub fn set_current_version(&self, wtxn: &mut RwTxn) -> Result<(), heed::Error> {
let major = versioning::VERSION_MAJOR.parse().unwrap();
let minor = versioning::VERSION_MINOR.parse().unwrap();
let patch = versioning::VERSION_PATCH.parse().unwrap();
self.set_version(wtxn, (major, minor, patch))
}
/// Return `Self` without checking anything about the version
pub fn raw_new(env: &Env, wtxn: &mut RwTxn) -> Result<Self, heed::Error> {
let version = env.create_database(wtxn, Some(db_name::VERSION))?;
Ok(Self { version })
}
pub(crate) fn new(env: &Env, db_version: (u32, u32, u32)) -> Result<Self> {
let mut wtxn = env.write_txn()?;
let this = Self::raw_new(env, &mut wtxn)?;
let from = match this.get_version(&wtxn)? {
Some(version) => version,
// fresh DB: use the db version
None => {
this.set_version(&mut wtxn, db_version)?;
db_version
}
};
wtxn.commit()?;
let bin_major: u32 = versioning::VERSION_MAJOR.parse().unwrap();
let bin_minor: u32 = versioning::VERSION_MINOR.parse().unwrap();
let bin_patch: u32 = versioning::VERSION_PATCH.parse().unwrap();
let to = (bin_major, bin_minor, bin_patch);
if from != to {
upgrade_index_scheduler(env, &this, from, to)?;
}
// Once we reach this point it means the upgrade process, if there was one is entirely finished
// we can safely say we reached the latest version of the index scheduler
let mut wtxn = env.write_txn()?;
this.set_current_version(&mut wtxn)?;
wtxn.commit()?;
Ok(this)
}
}