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methods to update index time metadata

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mpostma 2021-03-11 18:32:04 +01:00
parent c9f9d39b54
commit 80d0f9c49d
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34
milli/src/index.rs
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@ -6,6 +6,7 @@ use anyhow::Context;
use heed::types::*;
use heed::{PolyDatabase, Database, RwTxn, RoTxn};
use roaring::RoaringBitmap;
use chrono::{Utc, DateTime};
use crate::facet::FacetType;
use crate::fields_ids_map::FieldsIdsMap;
@ -28,6 +29,8 @@ pub const HARD_EXTERNAL_DOCUMENTS_IDS_KEY: &str = "hard-external-documents-ids";
pub const SOFT_EXTERNAL_DOCUMENTS_IDS_KEY: &str = "soft-external-documents-ids";
pub const WORDS_FST_KEY: &str = "words-fst";
pub const WORDS_PREFIXES_FST_KEY: &str = "words-prefixes-fst";
const CREATED_AT_KEY: &str = "created-at";
const UPDATED_AT_KEY: &str ="updated-at";
#[derive(Clone)]
pub struct Index {
@ -68,6 +71,17 @@ impl Index {
let field_id_docid_facet_values = env.create_database(Some("field-id-docid-facet-values"))?;
let documents = env.create_database(Some("documents"))?;
{
let mut txn = env.write_txn()?;
// The db was just created, we update its metadata with the relevant information.
if main.get::<_, Str, SerdeJson<DateTime<Utc>>>(&txn, CREATED_AT_KEY)?.is_none() {
let now = Utc::now();
main.put::<_, Str, SerdeJson<DateTime<Utc>>>(&mut txn, UPDATED_AT_KEY, &now)?;
main.put::<_, Str, SerdeJson<DateTime<Utc>>>(&mut txn, CREATED_AT_KEY, &now)?;
txn.commit()?;
}
}
Ok(Index {
env,
main,
@ -393,4 +407,24 @@ impl Index {
pub fn search<'a>(&'a self, rtxn: &'a RoTxn) -> Search<'a> {
Search::new(rtxn, self)
}
/// Returns the index creation time.
pub fn created_at(&self, rtxn: &RoTxn) -> heed::Result<DateTime<Utc>> {
let time = self.main
.get::<_, Str, SerdeJson<DateTime<Utc>>>(rtxn, CREATED_AT_KEY)?
.expect("Index without creation time");
Ok(time)
}
/// Returns the index creation time.
pub fn updated_at(&self, rtxn: &RoTxn) -> heed::Result<DateTime<Utc>> {
let time = self.main
.get::<_, Str, SerdeJson<DateTime<Utc>>>(rtxn, UPDATED_AT_KEY)?
.expect("Index without update time");
Ok(time)
}
pub(crate) fn set_updated_at(&self, wtxn: &mut RwTxn, time: &DateTime<Utc>) -> heed::Result<()> {
self.main.put::<_, Str, SerdeJson<DateTime<Utc>>>(wtxn, UPDATED_AT_KEY, &time)
}
}