review edits

src/index_controller/local_index_controller/index_store.rs

@@ -1,21 +1,24 @@
-use std::time::Duration;
 use std::fs::{create_dir_all, remove_dir_all};
 use std::path::{Path, PathBuf};
 use std::sync::Arc;
+use std::time::Duration;
 
 use anyhow::{bail, Context};
 use chrono::{DateTime, Utc};
-use dashmap::{DashMap, mapref::entry::Entry};
+use dashmap::{mapref::entry::Entry, DashMap};
-use heed::{Env, EnvOpenOptions, Database, types::{Str, SerdeJson, ByteSlice}, RoTxn, RwTxn};
+use heed::{
+    types::{ByteSlice, SerdeJson, Str},
+    Database, Env, EnvOpenOptions, RoTxn, RwTxn,
+};
 use log::{error, info};
 use milli::Index;
 use rayon::ThreadPool;
-use serde::{Serialize, Deserialize};
+use serde::{Deserialize, Serialize};
 use uuid::Uuid;
 
-use crate::option::IndexerOpts;
 use super::update_handler::UpdateHandler;
 use super::{UpdateMeta, UpdateResult};
+use crate::option::IndexerOpts;
 
 type UpdateStore = super::update_store::UpdateStore<UpdateMeta, UpdateResult, String>;
 
@@ -94,7 +97,8 @@ impl IndexStore {
     pub fn delete(&self, index_uid: impl AsRef<str>) -> anyhow::Result<()> {
         // we remove the references to the index from the index map so it is not accessible anymore
         let mut txn = self.env.write_txn()?;
-        let uuid = self.index_uuid(&txn, &index_uid)?
+        let uuid = self
+            .index_uuid(&txn, &index_uid)?
             .with_context(|| format!("Index {:?} doesn't exist", index_uid.as_ref()))?;
         self.name_to_uuid.delete(&mut txn, index_uid.as_ref())?;
         self.uuid_to_index_meta.delete(&mut txn, uuid.as_bytes())?;
@@ -119,8 +123,7 @@ impl IndexStore {
                 if let Err(e) = updates.abort_pendings() {
                     error!(
                         "error aborting pending updates when deleting index {:?}: {}",
-                        index_uid,
+                        index_uid, e
-                        e
                     );
                 }
                 let updates = get_arc_ownership_blocking(updates);
@@ -156,23 +159,26 @@ impl IndexStore {
                 let uuid = Uuid::from_slice(bytes)?;
                 Ok(Some(uuid))
             }
-            None => Ok(None)
+            None => Ok(None),
         }
     }
 
-    fn retrieve_index(&self, txn: &RoTxn, uid: Uuid) -> anyhow::Result<Option<(Arc<Index>, Arc<UpdateStore>)>> {
+    fn retrieve_index(
+        &self,
+        txn: &RoTxn,
+        uid: Uuid,
+    ) -> anyhow::Result<Option<(Arc<Index>, Arc<UpdateStore>)>> {
         match self.uuid_to_index.entry(uid.clone()) {
-            Entry::Vacant(entry) => {
+            Entry::Vacant(entry) => match self.uuid_to_index_meta.get(txn, uid.as_bytes())? {
-                match self.uuid_to_index_meta.get(txn, uid.as_bytes())? {
                 Some(meta) => {
                     let path = self.env.path();
-                        let (index, updates) = meta.open(path, self.thread_pool.clone(), &self.indexer_options)?;
+                    let (index, updates) =
+                        meta.open(path, self.thread_pool.clone(), &self.indexer_options)?;
                     entry.insert((index.clone(), updates.clone()));
                     Ok(Some((index, updates)))
+                }
+                None => Ok(None),
             },
-                    None => Ok(None)
-                }
-            }
             Entry::Occupied(entry) => {
                 let (index, updates) = entry.get();
                 Ok(Some((index.clone(), updates.clone())))
@@ -180,14 +186,21 @@ impl IndexStore {
         }
     }
 
-    fn get_index_txn(&self, txn: &RoTxn, name: impl AsRef<str>) -> anyhow::Result<Option<(Arc<Index>, Arc<UpdateStore>)>> {
+    fn get_index_txn(
+        &self,
+        txn: &RoTxn,
+        name: impl AsRef<str>,
+    ) -> anyhow::Result<Option<(Arc<Index>, Arc<UpdateStore>)>> {
         match self.index_uuid(&txn, name)? {
             Some(uid) => self.retrieve_index(&txn, uid),
             None => Ok(None),
         }
     }
 
-    pub fn index(&self, name: impl AsRef<str>) -> anyhow::Result<Option<(Arc<Index>, Arc<UpdateStore>)>> {
+    pub fn index(
+        &self,
+        name: impl AsRef<str>,
+    ) -> anyhow::Result<Option<(Arc<Index>, Arc<UpdateStore>)>> {
         let txn = self.env.read_txn()?;
         self.get_index_txn(&txn, name)
     }
@@ -199,7 +212,8 @@ impl IndexStore {
         F: FnOnce(&Index) -> anyhow::Result<T>,
     {
         let mut txn = self.env.write_txn()?;
-        let (index, _) = self.get_index_txn(&txn, &name)?
+        let (index, _) = self
+            .get_index_txn(&txn, &name)?
             .with_context(|| format!("Index {:?} doesn't exist", name.as_ref()))?;
         let result = f(index.as_ref());
         match result {
@@ -208,18 +222,26 @@ impl IndexStore {
                 txn.commit()?;
                 Ok((ret, meta))
             }
-            Err(e) => Err(e)
+            Err(e) => Err(e),
         }
     }
 
-    pub fn index_with_meta(&self, name: impl AsRef<str>) -> anyhow::Result<Option<(Arc<Index>, IndexMeta)>> {
+    pub fn index_with_meta(
+        &self,
+        name: impl AsRef<str>,
+    ) -> anyhow::Result<Option<(Arc<Index>, IndexMeta)>> {
         let txn = self.env.read_txn()?;
         let uuid = self.index_uuid(&txn, &name)?;
         match uuid {
             Some(uuid) => {
-                let meta = self.uuid_to_index_meta.get(&txn, uuid.as_bytes())?
+                let meta = self
-                    .with_context(|| format!("unable to retrieve metadata for index {:?}", name.as_ref()))?;
+                    .uuid_to_index_meta
-                let (index, _) = self.retrieve_index(&txn, uuid)?
+                    .get(&txn, uuid.as_bytes())?
+                    .with_context(|| {
+                        format!("unable to retrieve metadata for index {:?}", name.as_ref())
+                    })?;
+                let (index, _) = self
+                    .retrieve_index(&txn, uuid)?
                     .with_context(|| format!("unable to retrieve index {:?}", name.as_ref()))?;
                 Ok(Some((index, meta)))
             }
@@ -227,13 +249,20 @@ impl IndexStore {
         }
     }
 
-    fn update_meta<F>(&self, txn: &mut RwTxn, name: impl AsRef<str>, f: F) -> anyhow::Result<IndexMeta>
+    fn update_meta<F>(
+        &self,
+        txn: &mut RwTxn,
+        name: impl AsRef<str>,
+        f: F,
+    ) -> anyhow::Result<IndexMeta>
     where
-        F: FnOnce(&mut IndexMeta)
+        F: FnOnce(&mut IndexMeta),
     {
-        let uuid = self.index_uuid(txn, &name)?
+        let uuid = self
+            .index_uuid(txn, &name)?
             .with_context(|| format!("Index {:?} doesn't exist", name.as_ref()))?;
-        let mut meta = self.uuid_to_index_meta
+        let mut meta = self
+            .uuid_to_index_meta
             .get(txn, uuid.as_bytes())?
             .with_context(|| format!("couldn't retrieve metadata for index {:?}", name.as_ref()))?;
         f(&mut meta);
@@ -252,7 +281,8 @@ impl IndexStore {
             Some(res) => Ok(res),
             None => {
                 let uuid = Uuid::new_v4();
-                let (index, updates, _) = self.create_index_txn(&mut txn, uuid, name, update_size, index_size)?;
+                let (index, updates, _) =
+                    self.create_index_txn(&mut txn, uuid, name, update_size, index_size)?;
                 // If we fail to commit the transaction, we must delete the database from the
                 // file-system.
                 if let Err(e) = txn.commit() {
@@ -260,7 +290,7 @@ impl IndexStore {
                     return Err(e)?;
                 }
                 Ok((index, updates))
-            },
+            }
         }
     }
 
@@ -275,7 +305,8 @@ impl IndexStore {
         self.uuid_to_index.remove(&uuid);
     }
 
-    fn create_index_txn( &self,
+    fn create_index_txn(
+        &self,
         txn: &mut RwTxn,
         uuid: Uuid,
         name: impl AsRef<str>,
@@ -296,15 +327,17 @@ impl IndexStore {
         self.uuid_to_index_meta.put(txn, uuid.as_bytes(), &meta)?;
 
         let path = self.env.path();
-        let (index, update_store) = match meta.open(path, self.thread_pool.clone(), &self.indexer_options) {
+        let (index, update_store) =
+            match meta.open(path, self.thread_pool.clone(), &self.indexer_options) {
                 Ok(res) => res,
                 Err(e) => {
                     self.clean_db(uuid);
-                return Err(e)
+                    return Err(e);
                 }
             };
 
-        self.uuid_to_index.insert(uuid, (index.clone(), update_store.clone()));
+        self.uuid_to_index
+            .insert(uuid, (index.clone(), update_store.clone()));
 
         Ok((index, update_store, meta))
     }
@@ -338,19 +371,24 @@ impl IndexStore {
     /// This method will force all the indexes to be loaded.
     pub fn list_indexes(&self) -> anyhow::Result<Vec<(String, IndexMeta, Option<String>)>> {
         let txn = self.env.read_txn()?;
-        let metas = self.name_to_uuid
+        let metas = self.name_to_uuid.iter(&txn)?.filter_map(|entry| {
-            .iter(&txn)?
+            entry
-            .filter_map(|entry| entry
+                .map_err(|e| {
-                .map_err(|e| { error!("error decoding entry while listing indexes: {}", e); e }).ok());
+                    error!("error decoding entry while listing indexes: {}", e);
+                    e
+                })
+                .ok()
+        });
         let mut indexes = Vec::new();
         for (name, uuid) in metas {
             // get index to retrieve primary key
-            let (index, _) = self.get_index_txn(&txn, name)?
+            let (index, _) = self
+                .get_index_txn(&txn, name)?
                 .with_context(|| format!("could not load index {:?}", name))?;
-            let primary_key = index.primary_key(&index.read_txn()?)?
+            let primary_key = index.primary_key(&index.read_txn()?)?.map(String::from);
-                .map(String::from);
             // retieve meta
-            let meta = self.uuid_to_index_meta
+            let meta = self
+                .uuid_to_index_meta
                 .get(&txn, &uuid)?
                 .with_context(|| format!("could not retieve meta for index {:?}", name))?;
             indexes.push((name.to_owned(), meta, primary_key));
@@ -373,7 +411,10 @@ fn get_arc_ownership_blocking<T>(mut item: Arc<T>) -> T {
     }
 }
 
-fn open_or_create_database<K: 'static, V: 'static>(env: &Env, name: Option<&str>) -> anyhow::Result<Database<K, V>> {
+fn open_or_create_database<K: 'static, V: 'static>(
+    env: &Env,
+    name: Option<&str>,
+) -> anyhow::Result<Database<K, V>> {
     match env.open_database::<K, V>(name)? {
         Some(db) => Ok(db),
         None => Ok(env.create_database::<K, V>(name)?),
@@ -432,7 +473,10 @@ mod test {
             // insert an uuid in the the name_to_uuid_db:
             let uuid = Uuid::new_v4();
             let mut txn = store.env.write_txn().unwrap();
-            store.name_to_uuid.put(&mut txn, &name, uuid.as_bytes()).unwrap();
+            store
+                .name_to_uuid
+                .put(&mut txn, &name, uuid.as_bytes())
+                .unwrap();
             txn.commit().unwrap();
 
             // check that the uuid is there
@@ -460,7 +504,10 @@ mod test {
                 updated_at,
             };
             let mut txn = store.env.write_txn().unwrap();
-            store.uuid_to_index_meta.put(&mut txn, uuid.as_bytes(), &meta).unwrap();
+            store
+                .uuid_to_index_meta
+                .put(&mut txn, uuid.as_bytes(), &meta)
+                .unwrap();
             txn.commit().unwrap();
 
             // the index cache should be empty
@@ -491,8 +538,14 @@ mod test {
                 updated_at,
             };
             let mut txn = store.env.write_txn().unwrap();
-            store.name_to_uuid.put(&mut txn, &name, uuid.as_bytes()).unwrap();
+            store
-            store.uuid_to_index_meta.put(&mut txn, uuid.as_bytes(), &meta).unwrap();
+                .name_to_uuid
+                .put(&mut txn, &name, uuid.as_bytes())
+                .unwrap();
+            store
+                .uuid_to_index_meta
+                .put(&mut txn, uuid.as_bytes(), &meta)
+                .unwrap();
             txn.commit().unwrap();
 
             assert!(store.index(&name).unwrap().is_some());
@@ -506,13 +559,19 @@ mod test {
 
             let update_store_size = 4096 * 100;
             let index_store_size = 4096 * 100;
-            store.get_or_create_index(&name, update_store_size, index_store_size).unwrap();
+            store
+                .get_or_create_index(&name, update_store_size, index_store_size)
+                .unwrap();
             let txn = store.env.read_txn().unwrap();
             let uuid = store.name_to_uuid.get(&txn, &name).unwrap();
             assert_eq!(store.uuid_to_index.len(), 1);
             assert!(uuid.is_some());
             let uuid = Uuid::from_slice(uuid.unwrap()).unwrap();
-            let meta = store.uuid_to_index_meta.get(&txn, uuid.as_bytes()).unwrap().unwrap();
+            let meta = store
+                .uuid_to_index_meta
+                .get(&txn, uuid.as_bytes())
+                .unwrap()
+                .unwrap();
             assert_eq!(meta.update_store_size, update_store_size);
             assert_eq!(meta.index_store_size, index_store_size);
             assert_eq!(meta.uuid, uuid);
@@ -528,12 +587,18 @@ mod test {
             let index_store_size = 4096 * 100;
             let uuid = Uuid::new_v4();
             let mut txn = store.env.write_txn().unwrap();
-            store.create_index_txn(&mut txn, uuid, name, update_store_size, index_store_size).unwrap();
+            store
+                .create_index_txn(&mut txn, uuid, name, update_store_size, index_store_size)
+                .unwrap();
             let uuid = store.name_to_uuid.get(&txn, &name).unwrap();
             assert_eq!(store.uuid_to_index.len(), 1);
             assert!(uuid.is_some());
             let uuid = Uuid::from_slice(uuid.unwrap()).unwrap();
-            let meta = store.uuid_to_index_meta.get(&txn, uuid.as_bytes()).unwrap().unwrap();
+            let meta = store
+                .uuid_to_index_meta
+                .get(&txn, uuid.as_bytes())
+                .unwrap()
+                .unwrap();
             assert_eq!(meta.update_store_size, update_store_size);
             assert_eq!(meta.index_store_size, index_store_size);
             assert_eq!(meta.uuid, uuid);

src/index_controller/local_index_controller/update_store.rs

@@ -66,7 +66,7 @@ where
             processing,
         });
 
-        // We need a week reference so we can take ownership on the arc later when we
+        // We need a weak reference so we can take ownership on the arc later when we
         // want to close the index.
         let update_store_weak = Arc::downgrade(&update_store);
         std::thread::spawn(move || {
@@ -81,7 +81,7 @@ where
                                 Err(e) => eprintln!("error while processing update: {}", e),
                             }
                         }
-                        // the ownership on the arc has been taken, we need to exit
+                        // the ownership on the arc has been taken, we need to exit.
                         None => break 'outer,
                     }
                 }
@@ -92,9 +92,7 @@ where
     }
 
     pub fn prepare_for_closing(self) -> heed::EnvClosingEvent {
-        // We ignore this error, since that would mean the event loop is already closed.
+        self.env.prepare_for_closing()
-        let closing_event = self.env.prepare_for_closing();
-        closing_event
     }
 
     /// Returns the new biggest id to use to store the new update.