use std::collections::HashMap; use std::ops::Deref; use std::sync::Arc; use chrono::{DateTime, Utc}; use heed::types::{SerdeBincode, Str}; use log::error; use meilisearch_core::{Database, Error as MError, MResult, MainT, UpdateT}; use sysinfo::Pid; use crate::option::Opt; use crate::routes::index::index_update_callback; const LAST_UPDATE_KEY: &str = "last-update"; type SerdeDatetime = SerdeBincode>; #[derive(Clone)] pub struct Data { inner: Arc, } impl Deref for Data { type Target = DataInner; fn deref(&self) -> &Self::Target { &self.inner } } #[derive(Clone)] pub struct DataInner { pub db: Arc, pub db_path: String, pub api_key: Option, pub server_pid: Pid, } impl DataInner { pub fn is_indexing(&self, reader: &heed::RoTxn, index: &str) -> MResult> { match self.db.open_index(&index) { Some(index) => index.current_update_id(&reader).map(|u| Some(u.is_some())), None => Ok(None), } } pub fn last_update(&self, reader: &heed::RoTxn) -> MResult>> { match self .db .common_store() .get::<_, Str, SerdeDatetime>(reader, LAST_UPDATE_KEY)? { Some(datetime) => Ok(Some(datetime)), None => Ok(None), } } pub fn set_last_update(&self, writer: &mut heed::RwTxn) -> MResult<()> { self.db .common_store() .put::<_, Str, SerdeDatetime>(writer, LAST_UPDATE_KEY, &Utc::now()) .map_err(Into::into) } pub fn compute_stats(&self, writer: &mut heed::RwTxn, index_uid: &str) -> MResult<()> { let index = match self.db.open_index(&index_uid) { Some(index) => index, None => { error!("Impossible to retrieve index {}", index_uid); return Ok(()); } }; let schema = match index.main.schema(&writer)? { Some(schema) => schema, None => return Ok(()), }; let all_documents_fields = index .documents_fields_counts .all_documents_fields_counts(&writer)?; // count fields frequencies let mut fields_frequency = HashMap::<_, usize>::new(); for result in all_documents_fields { let (_, attr, _) = result?; if let Some(field_id) = schema.indexed_pos_to_field_id(attr) { *fields_frequency.entry(field_id).or_default() += 1; } } // convert attributes to their names let frequency: HashMap<_, _> = fields_frequency .into_iter() .map(|(a, c)| (schema.name(a).unwrap().to_string(), c)) .collect(); index .main .put_fields_frequency(writer, &frequency) .map_err(MError::Zlmdb) } } impl Data { pub fn new(opt: Opt) -> Data { let db_path = opt.db_path.clone(); let api_key = opt.api_key.clone(); let server_pid = sysinfo::get_current_pid().unwrap(); let db = Arc::new(Database::open_or_create(opt.db_path).unwrap()); let inner_data = DataInner { db: db.clone(), db_path, api_key, server_pid, }; let data = Data { inner: Arc::new(inner_data), }; let callback_context = data.clone(); db.set_update_callback(Box::new(move |index_uid, status| { index_update_callback(&index_uid, &callback_context, status); })); data } }