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chore: Remove the database module from meilidb

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This commit is contained in:
Clément Renault 2019-03-29 16:58:55 +01:00
parent abf7191eec
commit 77405cc103
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18 changed files with 3 additions and 3377 deletions
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32
meilidb/Cargo.toml
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@ -5,39 +5,13 @@ version = "0.3.1"
authors = ["Kerollmops <renault.cle@gmail.com>"] authors = ["Kerollmops <renault.cle@gmail.com>"]
[dependencies] [dependencies]
arc-swap = "0.3.7"
bincode = "1.1.2"
byteorder = "1.3.1"
fst = "0.3.3"
hashbrown = { version = "0.1.8", features = ["serde"] }
linked-hash-map = { version = "0.5.1", features = ["serde_impl"] }
lockfree = "0.5.1"
log = "0.4.6"
meilidb-core = { path = "../meilidb-core", version = "0.1.0" } meilidb-core = { path = "../meilidb-core", version = "0.1.0" }
meilidb-tokenizer = { path = "../meilidb-tokenizer", version = "0.1.0" } meilidb-tokenizer = { path = "../meilidb-tokenizer", version = "0.1.0" }
sdset = "0.3.1"
serde = "1.0.88"
serde_derive = "1.0.88"
serde_json = { version = "1.0.38", features = ["preserve_order"] }
size_format = "1.0.2"
slice-group-by = "0.2.4"
toml = { version = "0.5.0", features = ["preserve_order"] }
unidecode = "0.3.0"
[dependencies.rocksdb]
git = "https://github.com/pingcap/rust-rocksdb.git"
rev = "306e201"
[features] [features]
default = ["simd"] default = []
i128 = ["bincode/i128", "meilidb-core/i128"] i128 = ["meilidb-core/i128"]
portable = ["rocksdb/portable"] nightly = ["meilidb-core/nightly"]
simd = ["rocksdb/sse"]
nightly = [
"hashbrown/nightly",
"slice-group-by/nightly",
"meilidb-core/nightly"
]
[dev-dependencies] [dev-dependencies]
csv = "1.0.5" csv = "1.0.5"

46
meilidb/src/database/config.rs
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@ -1,46 +0,0 @@
use std::collections::{HashSet, HashMap};
use serde_derive::{Serialize, Deserialize};
#[derive(Debug, Copy, Clone, PartialEq, Eq, Serialize, Deserialize)]
#[serde(rename_all = "lowercase")]
pub enum RankingOrdering {
Asc,
Dsc
}
#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
pub struct AccessToken {
pub read_key: String,
pub write_key: String,
pub admin_key: String,
}
#[derive(Default, Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
pub struct Config {
pub stop_words: Option<HashSet<String>>,
pub ranking_order: Option<Vec<String>>,
pub distinct_field: Option<String>,
pub ranking_rules: Option<HashMap<String, RankingOrdering>>,
pub access_token: Option<AccessToken>,
}
impl Config {
pub fn update_with(&mut self, new: Config) {
if let Some(stop_words) = new.stop_words {
self.stop_words = Some(stop_words);
};
if let Some(ranking_order) = new.ranking_order {
self.ranking_order = Some(ranking_order);
};
if let Some(distinct_field) = new.distinct_field {
self.distinct_field = Some(distinct_field);
};
if let Some(ranking_rules) = new.ranking_rules {
self.ranking_rules = Some(ranking_rules);
};
if let Some(access_token) = new.access_token {
self.access_token = Some(access_token);
};
}
}

149
meilidb/src/database/document_key.rs
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@ -1,149 +0,0 @@
use std::io::{Cursor, Read, Write};
use std::mem::size_of;
use std::fmt;
use byteorder::{BigEndian, WriteBytesExt, ReadBytesExt};
use crate::database::schema::SchemaAttr;
use meilidb_core::DocumentId;
const DOC_KEY_LEN: usize = 4 + size_of::<u64>();
const DOC_KEY_ATTR_LEN: usize = DOC_KEY_LEN + 1 + size_of::<u16>();
#[derive(Copy, Clone)]
pub struct DocumentKey([u8; DOC_KEY_LEN]);
impl DocumentKey {
pub fn new(id: DocumentId) -> DocumentKey {
let mut buffer = [0; DOC_KEY_LEN];
let mut wtr = Cursor::new(&mut buffer[..]);
wtr.write_all(b"doc-").unwrap();
wtr.write_u64::<BigEndian>(id.0).unwrap();
DocumentKey(buffer)
}
pub fn from_bytes(mut bytes: &[u8]) -> DocumentKey {
assert!(bytes.len() >= DOC_KEY_LEN);
assert_eq!(&bytes[..4], b"doc-");
let mut buffer = [0; DOC_KEY_LEN];
bytes.read_exact(&mut buffer).unwrap();
DocumentKey(buffer)
}
pub fn with_attribute(&self, attr: SchemaAttr) -> DocumentKeyAttr {
DocumentKeyAttr::new(self.document_id(), attr)
}
pub fn with_attribute_min(&self) -> DocumentKeyAttr {
DocumentKeyAttr::new(self.document_id(), SchemaAttr::min())
}
pub fn with_attribute_max(&self) -> DocumentKeyAttr {
DocumentKeyAttr::new(self.document_id(), SchemaAttr::max())
}
pub fn document_id(&self) -> DocumentId {
let id = (&self.0[4..]).read_u64::<BigEndian>().unwrap();
DocumentId(id)
}
}
impl AsRef<[u8]> for DocumentKey {
fn as_ref(&self) -> &[u8] {
&self.0
}
}
impl fmt::Debug for DocumentKey {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
f.debug_struct("DocumentKey")
.field("document_id", &self.document_id())
.finish()
}
}
#[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord)]
pub struct DocumentKeyAttr([u8; DOC_KEY_ATTR_LEN]);
impl DocumentKeyAttr {
pub fn new(id: DocumentId, attr: SchemaAttr) -> DocumentKeyAttr {
let mut buffer = [0; DOC_KEY_ATTR_LEN];
let DocumentKey(raw_key) = DocumentKey::new(id);
let mut wtr = Cursor::new(&mut buffer[..]);
wtr.write_all(&raw_key).unwrap();
wtr.write_all(b"-").unwrap();
wtr.write_u16::<BigEndian>(attr.0).unwrap();
DocumentKeyAttr(buffer)
}
pub fn with_attribute_min(id: DocumentId) -> DocumentKeyAttr {
DocumentKeyAttr::new(id, SchemaAttr::min())
}
pub fn with_attribute_max(id: DocumentId) -> DocumentKeyAttr {
DocumentKeyAttr::new(id, SchemaAttr::max())
}
pub fn from_bytes(mut bytes: &[u8]) -> DocumentKeyAttr {
assert!(bytes.len() >= DOC_KEY_ATTR_LEN);
assert_eq!(&bytes[..4], b"doc-");
let mut buffer = [0; DOC_KEY_ATTR_LEN];
bytes.read_exact(&mut buffer).unwrap();
DocumentKeyAttr(buffer)
}
pub fn document_id(&self) -> DocumentId {
let id = (&self.0[4..]).read_u64::<BigEndian>().unwrap();
DocumentId(id)
}
pub fn attribute(&self) -> SchemaAttr {
let offset = 4 + size_of::<u64>() + 1;
let value = (&self.0[offset..]).read_u16::<BigEndian>().unwrap();
SchemaAttr::new(value)
}
pub fn into_document_key(self) -> DocumentKey {
DocumentKey::new(self.document_id())
}
}
impl AsRef<[u8]> for DocumentKeyAttr {
fn as_ref(&self) -> &[u8] {
&self.0
}
}
impl fmt::Debug for DocumentKeyAttr {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
f.debug_struct("DocumentKeyAttr")
.field("document_id", &self.document_id())
.field("attribute", &self.attribute().0)
.finish()
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn keep_as_ref_order() {
for (a, b) in (0..).zip(1..).take(u16::max_value() as usize - 1) {
let id = DocumentId(0);
let a = DocumentKeyAttr::new(id, SchemaAttr(a));
let b = DocumentKeyAttr::new(id, SchemaAttr(b));
assert!(a < b);
assert!(a.as_ref() < b.as_ref());
}
}
}

899
meilidb/src/database/mod.rs
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@ -1,899 +0,0 @@
use std::time::Instant;
use std::error::Error;
use std::ffi::OsStr;
use std::sync::Arc;
use std::fs;
use std::path::{Path, PathBuf};
use std::sync::atomic::{AtomicBool, Ordering};
use std::ops::{Deref, DerefMut};
use rocksdb::rocksdb_options::{DBOptions, ColumnFamilyOptions};
use rocksdb::rocksdb::{Writable, Snapshot};
use rocksdb::{DB, MergeOperands};
use size_format::SizeFormatterBinary;
use arc_swap::ArcSwap;
use lockfree::map::Map;
use hashbrown::HashMap;
use log::{info, error, warn};
use crate::database::schema::SchemaAttr;
use meilidb_core::shared_data_cursor::FromSharedDataCursor;
use meilidb_core::write_to_bytes::WriteToBytes;
use meilidb_core::{Index, DocumentId};
use self::update::{ReadIndexEvent, ReadRankedMapEvent};
pub use self::config::Config;
pub use self::document_key::{DocumentKey, DocumentKeyAttr};
pub use self::view::{DatabaseView, DocumentIter};
pub use self::update::Update;
pub use self::serde::SerializerError;
pub use self::schema::Schema;
pub use self::number::{Number, ParseNumberError};
pub type RankedMap = HashMap<(DocumentId, SchemaAttr), Number>;
const DATA_INDEX: &[u8] = b"data-index";
const DATA_RANKED_MAP: &[u8] = b"data-ranked-map";
const DATA_SCHEMA: &[u8] = b"data-schema";
const CONFIG: &[u8] = b"config";
pub mod config;
pub mod schema;
mod number;
mod document_key;
mod serde;
mod update;
mod view;
fn retrieve_data_schema<D>(snapshot: &Snapshot<D>) -> Result<Schema, Box<Error>>
where D: Deref<Target=DB>
{
match snapshot.get(DATA_SCHEMA)? {
Some(vector) => Ok(Schema::read_from_bin(&*vector)?),
None => Err(String::from("BUG: no schema found in the database").into()),
}
}
fn retrieve_data_index<D>(snapshot: &Snapshot<D>) -> Result<Index, Box<Error>>
where D: Deref<Target=DB>
{
let start = Instant::now();
let vector = snapshot.get(DATA_INDEX)?;
info!("loading index from kv-store took {:.2?}", start.elapsed());
match vector {
Some(vector) => {
let start = Instant::now();
let bytes = vector.as_ref().to_vec();
info!("index size is {}B", SizeFormatterBinary::new(bytes.len() as u64));
let event = ReadIndexEvent::from_bytes(bytes)?;
let index = event.updated_documents().expect("BUG: invalid event deserialized");
info!("loading index from bytes took {:.2?}", start.elapsed());
Ok(index)
},
None => Ok(Index::default()),
}
}
fn retrieve_data_ranked_map<D>(snapshot: &Snapshot<D>) -> Result<RankedMap, Box<Error>>
where D: Deref<Target=DB>,
{
let start = Instant::now();
let vector = snapshot.get(DATA_RANKED_MAP)?;
info!("loading ranked map from kv-store took {:.2?}", start.elapsed());
match vector {
Some(vector) => {
let start = Instant::now();
let bytes = vector.as_ref().to_vec();
info!("ranked map size is {}B", SizeFormatterBinary::new(bytes.len() as u64));
let event = ReadRankedMapEvent::from_bytes(bytes)?;
let ranked_map = event.updated_documents().expect("BUG: invalid event deserialized");
info!("loading ranked map from bytes took {:.2?}", start.elapsed());
Ok(ranked_map)
},
None => Ok(RankedMap::new()),
}
}
fn retrieve_config<D>(snapshot: &Snapshot<D>) -> Result<Config, Box<Error>>
where D: Deref<Target=DB>,
{
match snapshot.get(CONFIG)? {
Some(vector) => Ok(bincode::deserialize(&*vector)?),
None => Ok(Config::default()),
}
}
fn merge_indexes(existing: Option<&[u8]>, operands: &mut MergeOperands) -> Vec<u8> {
use self::update::ReadIndexEvent::{self, *};
use self::update::WriteIndexEvent;
let mut index = Index::default();
for bytes in existing.into_iter().chain(operands) {
match ReadIndexEvent::from_bytes(bytes.to_vec()).unwrap() {
RemovedDocuments(d) => index = index.remove_documents(d.as_ref()),
UpdatedDocuments(i) => index = index.union(&i),
}
}
WriteIndexEvent::UpdatedDocuments(&index).into_bytes()
}
fn merge_ranked_maps(existing: Option<&[u8]>, operands: &mut MergeOperands) -> Vec<u8> {
use self::update::ReadRankedMapEvent::{self, *};
use self::update::WriteRankedMapEvent;
let mut ranked_map = RankedMap::default();
for bytes in existing.into_iter().chain(operands) {
match ReadRankedMapEvent::from_bytes(bytes.to_vec()).unwrap() {
RemovedDocuments(d) => ranked_map.retain(|(k, _), _| !d.as_ref().binary_search(k).is_ok()),
UpdatedDocuments(i) => ranked_map.extend(i),
}
}
WriteRankedMapEvent::UpdatedDocuments(&ranked_map).into_bytes()
}
fn merge_operator(key: &[u8], existing: Option<&[u8]>, operands: &mut MergeOperands) -> Vec<u8> {
match key {
DATA_INDEX => merge_indexes(existing, operands),
DATA_RANKED_MAP => merge_ranked_maps(existing, operands),
key => panic!("The merge operator does not support merging {:?}", key),
}
}
pub struct IndexUpdate {
index: String,
update: Update,
}
impl Deref for IndexUpdate {
type Target = Update;
fn deref(&self) -> &Update {
&self.update
}
}
impl DerefMut for IndexUpdate {
fn deref_mut(&mut self) -> &mut Update {
&mut self.update
}
}
struct DatabaseIndex {
db: Arc<DB>,
// This view is updated each time the DB ingests an update.
view: ArcSwap<DatabaseView<Arc<DB>>>,
// The path of the mdb folder stored on disk.
path: PathBuf,
// must_die false by default, must be set as true when the Index is dropped.
// It is used to erase the folder saved on disk when the user request to delete an index.
must_die: AtomicBool,
}
impl DatabaseIndex {
fn create<P: AsRef<Path>>(path: P, schema: &Schema) -> Result<DatabaseIndex, Box<Error>> {
let path = path.as_ref();
if path.exists() {
return Err(format!("File already exists at path: {}, cannot create database.",
path.display()).into())
}
let path_lossy = path.to_string_lossy();
let mut opts = DBOptions::new();
opts.create_if_missing(true);
// opts.error_if_exists(true); // FIXME pull request that
let mut cf_opts = ColumnFamilyOptions::new();
cf_opts.add_merge_operator("data merge operator", merge_operator);
let db = DB::open_cf(opts, &path_lossy, vec![("default", cf_opts)])?;
let mut schema_bytes = Vec::new();
schema.write_to_bin(&mut schema_bytes)?;
db.put(DATA_SCHEMA, &schema_bytes)?;
let db = Arc::new(db);
let snapshot = Snapshot::new(db.clone());
let view = ArcSwap::new(Arc::new(DatabaseView::new(snapshot)?));
Ok(DatabaseIndex {
db: db,
view: view,
path: path.to_path_buf(),
must_die: AtomicBool::new(false)
})
}
fn open<P: AsRef<Path>>(path: P) -> Result<DatabaseIndex, Box<Error>> {
let path_lossy = path.as_ref().to_string_lossy();
let mut opts = DBOptions::new();
opts.create_if_missing(false);
let mut cf_opts = ColumnFamilyOptions::new();
cf_opts.add_merge_operator("data merge operator", merge_operator);
let db = DB::open_cf(opts, &path_lossy, vec![("default", cf_opts)])?;
// FIXME create a generic function to do that !
let _schema = match db.get(DATA_SCHEMA)? {
Some(value) => Schema::read_from_bin(&*value)?,
None => return Err(String::from("Database does not contain a schema").into()),
};
let db = Arc::new(db);
let snapshot = Snapshot::new(db.clone());
let view = ArcSwap::new(Arc::new(DatabaseView::new(snapshot)?));
Ok(DatabaseIndex {
db: db,
view: view,
path: path.as_ref().to_path_buf(),
must_die: AtomicBool::new(false)
})
}
fn must_die(&self) {
self.must_die.store(true, Ordering::Relaxed)
}
fn start_update(&self) -> Result<Update, Box<Error>> {
let schema = match self.db.get(DATA_SCHEMA)? {
Some(value) => Schema::read_from_bin(&*value)?,
None => panic!("Database does not contain a schema"),
};
Ok(Update::new(schema))
}
fn commit_update(&self, update: Update) -> Result<Arc<DatabaseView<Arc<DB>>>, Box<Error>> {
let batch = update.build()?;
self.db.write(batch)?;
self.db.compact_range(None, None);
self.db.flush(true)?;
let snapshot = Snapshot::new(self.db.clone());
let view = Arc::new(DatabaseView::new(snapshot)?);
self.view.store(view.clone());
Ok(view)
}
fn view(&self) -> Arc<DatabaseView<Arc<DB>>> {
self.view.load()
}
fn get_config(&self) -> Config {
self.view().config().clone()
}
fn update_config(&self, config: Config) -> Result<Arc<DatabaseView<Arc<DB>>>, Box<Error>>{
let data = bincode::serialize(&config)?;
self.db.put(CONFIG, &data)?;
let snapshot = Snapshot::new(self.db.clone());
let view = Arc::new(DatabaseView::new(snapshot)?);
self.view.store(view.clone());
Ok(view)
}
fn path(&self) -> &Path {
self.path.as_path()
}
}
impl Drop for DatabaseIndex {
fn drop(&mut self) {
if self.must_die.load(Ordering::Relaxed) {
if let Err(err) = fs::remove_dir_all(&self.path) {
error!("Impossible to remove mdb when Database is dropped; {}", err);
}
}
}
}
pub struct Database {
indexes: Map<String, Arc<DatabaseIndex>>,
path: PathBuf,
}
impl Database {
pub fn create<P: AsRef<Path>>(path: P) -> Result<Database, Box<Error>> {
Ok(Database {
indexes: Map::new(),
path: path.as_ref().to_path_buf(),
})
}
pub fn open<P: AsRef<Path>>(path: P) -> Result<Database, Box<Error>> {
let entries = fs::read_dir(&path)?;
let indexes = Map::new();
for entry in entries {
let path = match entry {
Ok(p) => p.path(),
Err(err) => {
warn!("Impossible to retrieve the path from an entry; {}", err);
continue
}
};
let name = match path.file_stem().and_then(OsStr::to_str) {
Some(name) => name.to_owned(),
None => continue
};
let db = match DatabaseIndex::open(path.clone()) {
Ok(db) => db,
Err(err) => {
warn!("Impossible to open the database; {}", err);
continue
}
};
info!("Load database {}", name);
indexes.insert(name, Arc::new(db));
}
Ok(Database {
indexes: indexes,
path: path.as_ref().to_path_buf(),
})
}
pub fn create_index(&self, name: &str, schema: &Schema) -> Result<(), Box<Error>> {
let index_path = self.path.join(name);
if index_path.exists() {
return Err("Index already exists".into());
}
let index = DatabaseIndex::create(index_path, schema)?;
self.indexes.insert(name.to_owned(), Arc::new(index));
Ok(())
}
pub fn delete_index(&self, name: &str) -> Result<(), Box<Error>> {
let index_guard = self.indexes.remove(name).ok_or("Index not found")?;
index_guard.val().must_die();
Ok(())
}
pub fn list_indexes(&self) -> Vec<String> {
self.indexes.iter().map(|g| g.key().clone()).collect()
}
pub fn start_update(&self, index: &str) -> Result<IndexUpdate, Box<Error>> {
let index_guard = self.indexes.get(index).ok_or("Index not found")?;
let update = index_guard.val().start_update()?;
Ok(IndexUpdate { index: index.to_owned(), update })
}
pub fn commit_update(&self, update: IndexUpdate)-> Result<Arc<DatabaseView<Arc<DB>>>, Box<Error>> {
let index_guard = self.indexes.get(&update.index).ok_or("Index not found")?;
index_guard.val().commit_update(update.update)
}
pub fn view(&self, index: &str) -> Result<Arc<DatabaseView<Arc<DB>>>, Box<Error>> {
let index_guard = self.indexes.get(index).ok_or("Index not found")?;
Ok(index_guard.val().view())
}
pub fn get_config(&self, index: &str) -> Result<Config, Box<Error>> {
let index_guard = self.indexes.get(index).ok_or("Index not found")?;
Ok(index_guard.val().get_config())
}
pub fn update_config(&self, index: &str, config: Config) -> Result<Arc<DatabaseView<Arc<DB>>>, Box<Error>>{
let index_guard = self.indexes.get(index).ok_or("Index not found")?;
Ok(index_guard.val().update_config(config)?)
}
pub fn path(&self) -> &Path {
self.path.as_path()
}
pub fn index_path(&self, index: &str) -> Result<PathBuf, Box<Error>> {
let index_guard = self.indexes.get(index).ok_or("Index not found")?;
let path = index_guard.val().path();
Ok(path.to_path_buf())
}
}
#[cfg(test)]
mod tests {
use std::collections::HashSet;
use std::error::Error;
use serde_derive::{Serialize, Deserialize};
use crate::database::schema::{SchemaBuilder, STORED, INDEXED};
use super::*;
#[test]
fn ingest_one_easy_update() -> Result<(), Box<Error>> {
let dir = tempfile::tempdir()?;
let stop_words = HashSet::new();
let meilidb_path = dir.path().join("meilidb.mdb");
let meilidb_index_name = "default";
#[derive(Serialize, Deserialize, Debug, Clone, PartialEq, Eq)]
struct SimpleDoc {
id: u64,
title: String,
description: String,
timestamp: u64,
}
let schema = {
let mut builder = SchemaBuilder::with_identifier("id");
builder.new_attribute("id", STORED);
builder.new_attribute("title", STORED | INDEXED);
builder.new_attribute("description", STORED | INDEXED);
builder.new_attribute("timestamp", STORED);
builder.build()
};
let database = Database::create(&meilidb_path)?;
database.create_index(meilidb_index_name, &schema)?;
let doc0 = SimpleDoc {
id: 0,
title: String::from("I am a title"),
description: String::from("I am a description"),
timestamp: 1234567,
};
let doc1 = SimpleDoc {
id: 1,
title: String::from("I am the second title"),
description: String::from("I am the second description"),
timestamp: 7654321,
};
let mut builder = database.start_update(meilidb_index_name)?;
let docid0 = builder.update_document(&doc0, &stop_words)?;
let docid1 = builder.update_document(&doc1, &stop_words)?;
let view = database.commit_update(builder)?;
let de_doc0: SimpleDoc = view.document_by_id(docid0)?;
let de_doc1: SimpleDoc = view.document_by_id(docid1)?;
assert_eq!(doc0, de_doc0);
assert_eq!(doc1, de_doc1);
Ok(dir.close()?)
}
#[test]
fn ingest_two_easy_updates() -> Result<(), Box<Error>> {
let dir = tempfile::tempdir()?;
let stop_words = HashSet::new();
let meilidb_path = dir.path().join("meilidb.mdb");
let meilidb_index_name = "default";
#[derive(Serialize, Deserialize, Debug, Clone, PartialEq, Eq)]
struct SimpleDoc {
id: u64,
title: String,
description: String,
timestamp: u64,
}
let schema = {
let mut builder = SchemaBuilder::with_identifier("id");
builder.new_attribute("id", STORED);
builder.new_attribute("title", STORED | INDEXED);
builder.new_attribute("description", STORED | INDEXED);
builder.new_attribute("timestamp", STORED);
builder.build()
};
let database = Database::create(&meilidb_path)?;
database.create_index(meilidb_index_name, &schema)?;
let doc0 = SimpleDoc {
id: 0,
title: String::from("I am a title"),
description: String::from("I am a description"),
timestamp: 1234567,
};
let doc1 = SimpleDoc {
id: 1,
title: String::from("I am the second title"),
description: String::from("I am the second description"),
timestamp: 7654321,
};
let doc2 = SimpleDoc {
id: 2,
title: String::from("I am the third title"),
description: String::from("I am the third description"),
timestamp: 7654321,
};
let doc3 = SimpleDoc {
id: 3,
title: String::from("I am the fourth title"),
description: String::from("I am the fourth description"),
timestamp: 7654321,
};
let mut builder = database.start_update(meilidb_index_name)?;
let docid0 = builder.update_document(&doc0, &stop_words)?;
let docid1 = builder.update_document(&doc1, &stop_words)?;
database.commit_update(builder)?;
let mut builder = database.start_update(meilidb_index_name)?;
let docid2 = builder.update_document(&doc2, &stop_words)?;
let docid3 = builder.update_document(&doc3, &stop_words)?;
let view = database.commit_update(builder)?;
let de_doc0: SimpleDoc = view.document_by_id(docid0)?;
let de_doc1: SimpleDoc = view.document_by_id(docid1)?;
assert_eq!(doc0, de_doc0);
assert_eq!(doc1, de_doc1);
let de_doc2: SimpleDoc = view.document_by_id(docid2)?;
let de_doc3: SimpleDoc = view.document_by_id(docid3)?;
assert_eq!(doc2, de_doc2);
assert_eq!(doc3, de_doc3);
Ok(dir.close()?)
}
}
#[cfg(all(feature = "nightly", test))]
mod bench {
extern crate test;
use std::collections::HashSet;
use std::error::Error;
use std::iter::repeat_with;
use self::test::Bencher;
use rand::distributions::Alphanumeric;
use rand_xorshift::XorShiftRng;
use rand::{Rng, SeedableRng};
use serde_derive::Serialize;
use rand::seq::SliceRandom;
use crate::tokenizer::DefaultBuilder;
use crate::database::schema::*;
use super::*;
fn random_sentences<R: Rng>(number: usize, rng: &mut R) -> String {
let mut words = String::new();
for i in 0..number {
let word_len = rng.gen_range(1, 12);
let iter = repeat_with(|| rng.sample(Alphanumeric)).take(word_len);
words.extend(iter);
if i == number - 1 { // last word
let final_ = [".", "?", "!", "..."].choose(rng).cloned();
words.extend(final_);
} else {
let middle = [",", ", "].choose(rng).cloned();
words.extend(middle);
}
}
words
}
#[bench]
fn open_little_database(bench: &mut Bencher) -> Result<(), Box<Error>> {
let dir = tempfile::tempdir()?;
let stop_words = HashSet::new();
let mut builder = SchemaBuilder::with_identifier("id");
builder.new_attribute("title", STORED | INDEXED);
builder.new_attribute("description", STORED | INDEXED);
let schema = builder.build();
let db_path = dir.path().join("bench.mdb");
let index_name = "default";
let database = Database::create(&db_path)?;
database.create_index(index_name, &schema)?;
#[derive(Serialize)]
struct Document {
id: u64,
title: String,
description: String,
}
let mut builder = database.start_update(index_name)?;
let mut rng = XorShiftRng::seed_from_u64(42);
for i in 0..300 {
let document = Document {
id: i,
title: random_sentences(rng.gen_range(1, 8), &mut rng),
description: random_sentences(rng.gen_range(20, 200), &mut rng),
};
builder.update_document(&document, &stop_words)?;
}
database.commit_update(builder)?;
drop(database);
bench.iter(|| {
let database = Database::open(db_path.clone()).unwrap();
test::black_box(|| database);
});
Ok(())
}
#[bench]
fn open_medium_database(bench: &mut Bencher) -> Result<(), Box<Error>> {
let dir = tempfile::tempdir()?;
let stop_words = HashSet::new();
let mut builder = SchemaBuilder::with_identifier("id");
builder.new_attribute("title", STORED | INDEXED);
builder.new_attribute("description", STORED | INDEXED);
let schema = builder.build();
let db_path = dir.path().join("bench.mdb");
let index_name = "default";
let database = Database::create(&db_path)?;
database.create_index(index_name, &schema)?;
#[derive(Serialize)]
struct Document {
id: u64,
title: String,
description: String,
}
let mut builder = database.start_update(index_name)?;
let mut rng = XorShiftRng::seed_from_u64(42);
for i in 0..3000 {
let document = Document {
id: i,
title: random_sentences(rng.gen_range(1, 8), &mut rng),
description: random_sentences(rng.gen_range(20, 200), &mut rng),
};
builder.update_document(&document, &stop_words)?;
}
database.commit_update(builder)?;
drop(database);
bench.iter(|| {
let database = Database::open(db_path.clone()).unwrap();
test::black_box(|| database);
});
Ok(())
}
#[bench]
#[ignore]
fn open_big_database(bench: &mut Bencher) -> Result<(), Box<Error>> {
let dir = tempfile::tempdir()?;
let stop_words = HashSet::new();
let mut builder = SchemaBuilder::with_identifier("id");
builder.new_attribute("title", STORED | INDEXED);
builder.new_attribute("description", STORED | INDEXED);
let schema = builder.build();
let db_path = dir.path().join("bench.mdb");
let index_name = "default";
let database = Database::create(&db_path)?;
database.create_index(index_name, &schema)?;
#[derive(Serialize)]
struct Document {
id: u64,
title: String,
description: String,
}
let mut builder = database.start_update(index_name)?;
let mut rng = XorShiftRng::seed_from_u64(42);
for i in 0..30_000 {
let document = Document {
id: i,
title: random_sentences(rng.gen_range(1, 8), &mut rng),
description: random_sentences(rng.gen_range(20, 200), &mut rng),
};
builder.update_document(&document, &stop_words)?;
}
database.commit_update(builder)?;
drop(database);
bench.iter(|| {
let database = Database::open(db_path.clone()).unwrap();
test::black_box(|| database);
});
Ok(())
}
#[bench]
fn search_oneletter_little_database(bench: &mut Bencher) -> Result<(), Box<Error>> {
let dir = tempfile::tempdir()?;
let stop_words = HashSet::new();
let mut builder = SchemaBuilder::with_identifier("id");
builder.new_attribute("title", STORED | INDEXED);
builder.new_attribute("description", STORED | INDEXED);
let schema = builder.build();
let db_path = dir.path().join("bench.mdb");
let index_name = "default";
let database = Database::create(&db_path)?;
database.create_index(index_name, &schema)?;
#[derive(Serialize)]
struct Document {
id: u64,
title: String,
description: String,
}
let mut builder = database.start_update(index_name)?;
let mut rng = XorShiftRng::seed_from_u64(42);
for i in 0..300 {
let document = Document {
id: i,
title: random_sentences(rng.gen_range(1, 8), &mut rng),
description: random_sentences(rng.gen_range(20, 200), &mut rng),
};
builder.update_document(&document, &stop_words)?;
}
let view = database.commit_update(builder)?;
bench.iter(|| {
for q in &["a", "b", "c", "d", "e"] {
let documents = view.query_builder().query(q, 0..20);
test::black_box(|| documents);
}
});
Ok(())
}
#[bench]
fn search_oneletter_medium_database(bench: &mut Bencher) -> Result<(), Box<Error>> {
let dir = tempfile::tempdir()?;
let stop_words = HashSet::new();
let mut builder = SchemaBuilder::with_identifier("id");
builder.new_attribute("title", STORED | INDEXED);
builder.new_attribute("description", STORED | INDEXED);
let schema = builder.build();
let db_path = dir.path().join("bench.mdb");
let index_name = "default";
let database = Database::create(&db_path)?;
database.create_index(index_name, &schema)?;
#[derive(Serialize)]
struct Document {
id: u64,
title: String,
description: String,
}
let mut builder = database.start_update(index_name)?;
let mut rng = XorShiftRng::seed_from_u64(42);
for i in 0..3000 {
let document = Document {
id: i,
title: random_sentences(rng.gen_range(1, 8), &mut rng),
description: random_sentences(rng.gen_range(20, 200), &mut rng),
};
builder.update_document(&document, &stop_words)?;
}
let view = database.commit_update(builder)?;
bench.iter(|| {
for q in &["a", "b", "c", "d", "e"] {
let documents = view.query_builder().query(q, 0..20);
test::black_box(|| documents);
}
});
Ok(())
}
#[bench]
#[ignore]
fn search_oneletter_big_database(bench: &mut Bencher) -> Result<(), Box<Error>> {
let dir = tempfile::tempdir()?;
let stop_words = HashSet::new();
let mut builder = SchemaBuilder::with_identifier("id");
builder.new_attribute("title", STORED | INDEXED);
builder.new_attribute("description", STORED | INDEXED);
let schema = builder.build();
let db_path = dir.path().join("bench.mdb");
let index_name = "default";
let database = Database::create(&db_path)?;
database.create_index(index_name, &schema)?;
#[derive(Serialize)]
struct Document {
id: u64,
title: String,
description: String,
}
let mut builder = database.start_update(index_name)?;
let mut rng = XorShiftRng::seed_from_u64(42);
for i in 0..30_000 {
let document = Document {
id: i,
title: random_sentences(rng.gen_range(1, 8), &mut rng),
description: random_sentences(rng.gen_range(20, 200), &mut rng),
};
builder.update_document(&document, &stop_words)?;
}
let view = database.commit_update(builder)?;
bench.iter(|| {
for q in &["a", "b", "c", "d", "e"] {
let documents = view.query_builder().query(q, 0..20);
test::black_box(|| documents);
}
});
Ok(())
}
}

98
meilidb/src/database/number.rs
View File

@ -1,98 +0,0 @@
use std::cmp::Ordering;
use std::str::FromStr;
use std::fmt;
use serde_derive::{Serialize, Deserialize};
#[derive(Serialize, Deserialize)]
#[derive(Debug, Copy, Clone)]
pub enum Number {
Unsigned(u64),
Signed(i64),
Float(f64),
}
impl FromStr for Number {
type Err = ParseNumberError;
fn from_str(s: &str) -> Result<Self, Self::Err> {
if let Ok(unsigned) = u64::from_str(s) {
return Ok(Number::Unsigned(unsigned))
}
if let Ok(signed) = i64::from_str(s) {
return Ok(Number::Signed(signed))
}
if let Ok(float) = f64::from_str(s) {
if float == 0.0 || float.is_normal() {
return Ok(Number::Float(float))
}
}
Err(ParseNumberError)
}
}
impl PartialOrd for Number {
fn partial_cmp(&self, other: &Number) -> Option<Ordering> {
Some(self.cmp(other))
}
}
impl Ord for Number {
fn cmp(&self, other: &Number) -> Ordering {
use Number::*;
match (self, other) {
(Unsigned(s), Unsigned(o)) => s.cmp(o),
(Unsigned(s), Signed(o)) => {
let s = i128::from(*s);
let o = i128::from(*o);
s.cmp(&o)
},
(Unsigned(s), Float(o)) => {
let s = *s as f64;
s.partial_cmp(&o).unwrap_or(Ordering::Equal)
},
(Signed(s), Unsigned(o)) => {
let s = i128::from(*s);
let o = i128::from(*o);
s.cmp(&o)
},
(Signed(s), Signed(o)) => s.cmp(o),
(Signed(s), Float(o)) => {
let s = *s as f64;
s.partial_cmp(o).unwrap_or(Ordering::Equal)
},
(Float(s), Unsigned(o)) => {
let o = *o as f64;
s.partial_cmp(&o).unwrap_or(Ordering::Equal)
},
(Float(s), Signed(o)) => {
let o = *o as f64;
s.partial_cmp(&o).unwrap_or(Ordering::Equal)
},
(Float(s), Float(o)) => {
s.partial_cmp(o).unwrap_or(Ordering::Equal)
},
}
}
}
impl PartialEq for Number {
fn eq(&self, other: &Number) -> bool {
self.cmp(other) == Ordering::Equal
}
}
impl Eq for Number { }
pub struct ParseNumberError;
impl fmt::Display for ParseNumberError {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
f.write_str("can not parse number")
}
}

319
meilidb/src/database/schema.rs
View File

@ -1,319 +0,0 @@
use std::collections::{HashMap, BTreeMap};
use std::io::{Read, Write};
use std::error::Error;
use std::{fmt, u16};
use std::ops::BitOr;
use std::sync::Arc;
use serde_derive::{Serialize, Deserialize};
use linked_hash_map::LinkedHashMap;
use crate::database::serde::find_id::FindDocumentIdSerializer;
use crate::database::serde::SerializerError;
use meilidb_core::DocumentId;
pub const STORED: SchemaProps = SchemaProps { stored: true, indexed: false, ranked: false };
pub const INDEXED: SchemaProps = SchemaProps { stored: false, indexed: true, ranked: false };
pub const RANKED: SchemaProps = SchemaProps { stored: false, indexed: false, ranked: true };
#[derive(Debug, Copy, Clone, PartialEq, Eq, Serialize, Deserialize)]
pub struct SchemaProps {
#[serde(default)]
stored: bool,
#[serde(default)]
indexed: bool,
#[serde(default)]
ranked: bool,
}
impl SchemaProps {
pub fn is_stored(self) -> bool {
self.stored
}
pub fn is_indexed(self) -> bool {
self.indexed
}
pub fn is_ranked(self) -> bool {
self.ranked
}
}
impl BitOr for SchemaProps {
type Output = Self;
fn bitor(self, other: Self) -> Self::Output {
SchemaProps {
stored: self.stored | other.stored,
indexed: self.indexed | other.indexed,
ranked: self.ranked | other.ranked,
}
}
}
#[derive(Serialize, Deserialize)]
pub struct SchemaBuilder {
identifier: String,
attributes: LinkedHashMap<String, SchemaProps>,
}
impl SchemaBuilder {
pub fn with_identifier<S: Into<String>>(name: S) -> SchemaBuilder {
SchemaBuilder {
identifier: name.into(),
attributes: LinkedHashMap::new(),
}
}
pub fn new_attribute<S: Into<String>>(&mut self, name: S, props: SchemaProps) -> SchemaAttr {
let len = self.attributes.len();
if self.attributes.insert(name.into(), props).is_some() {
panic!("Field already inserted.")
}
SchemaAttr(len as u16)
}
pub fn build(self) -> Schema {
let mut attrs = HashMap::new();
let mut props = Vec::new();
for (i, (name, prop)) in self.attributes.into_iter().enumerate() {
attrs.insert(name.clone(), SchemaAttr(i as u16));
props.push((name, prop));
}
let identifier = self.identifier;
Schema { inner: Arc::new(InnerSchema { identifier, attrs, props }) }
}
}
#[derive(Debug, Clone, PartialEq, Eq)]
pub struct Schema {
inner: Arc<InnerSchema>,
}
#[derive(Debug, Clone, PartialEq, Eq)]
struct InnerSchema {
identifier: String,
attrs: HashMap<String, SchemaAttr>,
props: Vec<(String, SchemaProps)>,
}
impl Schema {
pub fn from_toml<R: Read>(mut reader: R) -> Result<Schema, Box<Error>> {
let mut buffer = Vec::new();
reader.read_to_end(&mut buffer)?;
let builder: SchemaBuilder = toml::from_slice(&buffer)?;
Ok(builder.build())
}
pub fn to_toml<W: Write>(&self, mut writer: W) -> Result<(), Box<Error>> {
let identifier = self.inner.identifier.clone();
let attributes = self.attributes_ordered();
let builder = SchemaBuilder { identifier, attributes };
let string = toml::to_string_pretty(&builder)?;
writer.write_all(string.as_bytes())?;
Ok(())
}
pub fn from_json<R: Read>(mut reader: R) -> Result<Schema, Box<Error>> {
let mut buffer = Vec::new();
reader.read_to_end(&mut buffer)?;
let builder: SchemaBuilder = serde_json::from_slice(&buffer)?;
Ok(builder.build())
}
pub fn to_json<W: Write>(&self, mut writer: W) -> Result<(), Box<Error>> {
let identifier = self.inner.identifier.clone();
let attributes = self.attributes_ordered();
let builder = SchemaBuilder { identifier, attributes };
let string = serde_json::to_string_pretty(&builder)?;
writer.write_all(string.as_bytes())?;
Ok(())
}
pub(crate) fn read_from_bin<R: Read>(reader: R) -> bincode::Result<Schema> {
let builder: SchemaBuilder = bincode::deserialize_from(reader)?;
Ok(builder.build())
}
pub(crate) fn write_to_bin<W: Write>(&self, writer: W) -> bincode::Result<()> {
let identifier = self.inner.identifier.clone();
let attributes = self.attributes_ordered();
let builder = SchemaBuilder { identifier, attributes };
bincode::serialize_into(writer, &builder)
}
fn attributes_ordered(&self) -> LinkedHashMap<String, SchemaProps> {
let mut ordered = BTreeMap::new();
for (name, attr) in &self.inner.attrs {
let (_, props) = self.inner.props[attr.0 as usize];
ordered.insert(attr.0, (name, props));
}
let mut attributes = LinkedHashMap::with_capacity(ordered.len());
for (_, (name, props)) in ordered {
attributes.insert(name.clone(), props);
}
attributes
}
pub fn document_id<T>(&self, document: T) -> Result<DocumentId, SerializerError>
where T: serde::Serialize,
{
let id_attribute_name = &self.inner.identifier;
let serializer = FindDocumentIdSerializer { id_attribute_name };
document.serialize(serializer)
}
pub fn props(&self, attr: SchemaAttr) -> SchemaProps {
let (_, props) = self.inner.props[attr.0 as usize];
props
}
pub fn identifier_name(&self) -> &str {
&self.inner.identifier
}
pub fn attribute<S: AsRef<str>>(&self, name: S) -> Option<SchemaAttr> {
self.inner.attrs.get(name.as_ref()).cloned()
}
pub fn attribute_name(&self, attr: SchemaAttr) -> &str {
let (name, _) = &self.inner.props[attr.0 as usize];
name
}
}
#[derive(Serialize, Deserialize)]
#[derive(Debug, Copy, Clone, PartialOrd, Ord, PartialEq, Eq, Hash)]
pub struct SchemaAttr(pub u16);
impl SchemaAttr {
pub fn new(value: u16) -> SchemaAttr {
SchemaAttr(value)
}
pub fn min() -> SchemaAttr {
SchemaAttr(0)
}
pub fn next(self) -> Option<SchemaAttr> {
self.0.checked_add(1).map(SchemaAttr)
}
pub fn prev(self) -> Option<SchemaAttr> {
self.0.checked_sub(1).map(SchemaAttr)
}
pub fn max() -> SchemaAttr {
SchemaAttr(u16::MAX)
}
}
impl fmt::Display for SchemaAttr {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
self.0.fmt(f)
}
}
#[cfg(test)]
mod tests {
use super::*;
use std::error::Error;
#[test]
fn serialize_deserialize() -> bincode::Result<()> {
let mut builder = SchemaBuilder::with_identifier("id");
builder.new_attribute("alpha", STORED);
builder.new_attribute("beta", STORED | INDEXED);
builder.new_attribute("gamma", INDEXED);
let schema = builder.build();
let mut buffer = Vec::new();
schema.write_to_bin(&mut buffer)?;
let schema2 = Schema::read_from_bin(buffer.as_slice())?;
assert_eq!(schema, schema2);
Ok(())
}
#[test]
fn serialize_deserialize_toml() -> Result<(), Box<Error>> {
let mut builder = SchemaBuilder::with_identifier("id");
builder.new_attribute("alpha", STORED);
builder.new_attribute("beta", STORED | INDEXED);
builder.new_attribute("gamma", INDEXED);
let schema = builder.build();
let mut buffer = Vec::new();
schema.to_toml(&mut buffer)?;
let schema2 = Schema::from_toml(buffer.as_slice())?;
assert_eq!(schema, schema2);
let data = r#"
identifier = "id"
[attributes."alpha"]
stored = true
[attributes."beta"]
stored = true
indexed = true
[attributes."gamma"]
indexed = true
"#;
let schema2 = Schema::from_toml(data.as_bytes())?;
assert_eq!(schema, schema2);
Ok(())
}
#[test]
fn serialize_deserialize_json() -> Result<(), Box<Error>> {
let mut builder = SchemaBuilder::with_identifier("id");
builder.new_attribute("alpha", STORED);
builder.new_attribute("beta", STORED | INDEXED);
builder.new_attribute("gamma", INDEXED);
let schema = builder.build();
let mut buffer = Vec::new();
schema.to_json(&mut buffer)?;
let schema2 = Schema::from_json(buffer.as_slice())?;
assert_eq!(schema, schema2);
let data = r#"
{
"identifier": "id",
"attributes": {
"alpha": {
"stored": true
},
"beta": {
"stored": true,
"indexed": true
},
"gamma": {
"indexed": true
}
}
}"#;
let schema2 = Schema::from_json(data.as_bytes())?;
assert_eq!(schema, schema2);
Ok(())
}
}

186
meilidb/src/database/serde/deserializer.rs
View File

@ -1,186 +0,0 @@
use std::error::Error;
use std::ops::Deref;
use std::fmt;
use rocksdb::rocksdb::{DB, Snapshot, SeekKey};
use rocksdb::rocksdb_options::ReadOptions;
use serde::forward_to_deserialize_any;
use serde::de::value::MapDeserializer;
use serde::de::{self, Visitor, IntoDeserializer};
use crate::database::document_key::{DocumentKey, DocumentKeyAttr};
use crate::database::schema::Schema;
use meilidb_core::DocumentId;
pub struct Deserializer<'a, D>
where D: Deref<Target=DB>
{
snapshot: &'a Snapshot<D>,
schema: &'a Schema,
document_id: DocumentId,
}
impl<'a, D> Deserializer<'a, D>
where D: Deref<Target=DB>
{
pub fn new(snapshot: &'a Snapshot<D>, schema: &'a Schema, doc: DocumentId) -> Self {
Deserializer { snapshot, schema, document_id: doc }
}
}
impl<'de, 'a, 'b, D> de::Deserializer<'de> for &'b mut Deserializer<'a, D>
where D: Deref<Target=DB>
{
type Error = DeserializerError;
fn deserialize_any<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where V: Visitor<'de>
{
self.deserialize_map(visitor)
}
forward_to_deserialize_any! {
bool u8 u16 u32 u64 i8 i16 i32 i64 f32 f64 char str string unit seq
bytes byte_buf unit_struct tuple_struct
identifier tuple ignored_any option newtype_struct enum struct
}
fn deserialize_map<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where V: Visitor<'de>
{
let mut options = ReadOptions::new();
let lower = DocumentKey::new(self.document_id);
let upper = lower.with_attribute_max();
options.set_iterate_lower_bound(lower.as_ref());
options.set_iterate_upper_bound(upper.as_ref());
let mut iter = self.snapshot.iter_opt(options);
iter.seek(SeekKey::Start);
if iter.kv().is_none() {
// FIXME return an error
}
let iter = iter.map(|(key, value)| {
// retrieve the schema attribute name
// from the schema attribute number
let document_key_attr = DocumentKeyAttr::from_bytes(&key);
let schema_attr = document_key_attr.attribute();
let attribute_name = self.schema.attribute_name(schema_attr);
(attribute_name, Value(value))
});
let map_deserializer = MapDeserializer::new(iter);
visitor.visit_map(map_deserializer)
}
}
struct Value(Vec<u8>);
impl<'de> IntoDeserializer<'de, DeserializerError> for Value {
type Deserializer = Self;
fn into_deserializer(self) -> Self::Deserializer {
self
}
}
macro_rules! forward_to_bincode_values {
($($ty:ident => $de_method:ident,)*) => {
$(
fn $de_method<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where V: de::Visitor<'de>
{
match bincode::deserialize::<$ty>(&self.0) {
Ok(val) => val.into_deserializer().$de_method(visitor),
Err(e) => Err(de::Error::custom(e)),
}
}
)*
}
}
impl<'de, 'a> de::Deserializer<'de> for Value {
type Error = DeserializerError;
fn deserialize_any<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where V: Visitor<'de>
{
self.0.into_deserializer().deserialize_any(visitor)
}
fn deserialize_str<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where V: Visitor<'de>
{
self.deserialize_string(visitor)
}
fn deserialize_string<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where V: Visitor<'de>
{
match bincode::deserialize::<String>(&self.0) {
Ok(val) => val.into_deserializer().deserialize_string(visitor),
Err(e) => Err(de::Error::custom(e)),
}
}
fn deserialize_bytes<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where V: Visitor<'de>
{
self.deserialize_byte_buf(visitor)
}
fn deserialize_byte_buf<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where V: Visitor<'de>
{
match bincode::deserialize::<Vec<u8>>(&self.0) {
Ok(val) => val.into_deserializer().deserialize_byte_buf(visitor),
Err(e) => Err(de::Error::custom(e)),
}
}
forward_to_bincode_values! {
char => deserialize_char,
bool => deserialize_bool,
u8 => deserialize_u8,
u16 => deserialize_u16,
u32 => deserialize_u32,
u64 => deserialize_u64,
i8 => deserialize_i8,
i16 => deserialize_i16,
i32 => deserialize_i32,
i64 => deserialize_i64,
f32 => deserialize_f32,
f64 => deserialize_f64,
}
forward_to_deserialize_any! {
unit seq map
unit_struct tuple_struct
identifier tuple ignored_any option newtype_struct enum struct
}
}
#[derive(Debug)]
pub enum DeserializerError {
Custom(String),
}
impl de::Error for DeserializerError {
fn custom<T: fmt::Display>(msg: T) -> Self {
DeserializerError::Custom(msg.to_string())
}
}
impl fmt::Display for DeserializerError {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
match self {
DeserializerError::Custom(s) => f.write_str(&s),
}
}
}
impl Error for DeserializerError {}

243
meilidb/src/database/serde/find_id.rs
View File

@ -1,243 +0,0 @@
use serde::Serialize;
use serde::ser;
use crate::database::serde::key_to_string::KeyToStringSerializer;
use crate::database::serde::{SerializerError, calculate_hash};
use meilidb_core::DocumentId;
pub struct FindDocumentIdSerializer<'a> {
pub id_attribute_name: &'a str,
}
impl<'a> ser::Serializer for FindDocumentIdSerializer<'a> {
type Ok = DocumentId;
type Error = SerializerError;
type SerializeSeq = ser::Impossible<Self::Ok, Self::Error>;
type SerializeTuple = ser::Impossible<Self::Ok, Self::Error>;
type SerializeTupleStruct = ser::Impossible<Self::Ok, Self::Error>;
type SerializeTupleVariant = ser::Impossible<Self::Ok, Self::Error>;
type SerializeMap = FindDocumentIdMapSerializer<'a>;
type SerializeStruct = FindDocumentIdStructSerializer<'a>;
type SerializeStructVariant = ser::Impossible<Self::Ok, Self::Error>;
forward_to_unserializable_type! {
bool => serialize_bool,
char => serialize_char,
i8 => serialize_i8,
i16 => serialize_i16,
i32 => serialize_i32,
i64 => serialize_i64,
u8 => serialize_u8,
u16 => serialize_u16,
u32 => serialize_u32,
u64 => serialize_u64,
f32 => serialize_f32,
f64 => serialize_f64,
}
fn serialize_str(self, _v: &str) -> Result<Self::Ok, Self::Error> {
Err(SerializerError::UnserializableType { name: "str" })
}
fn serialize_bytes(self, _v: &[u8]) -> Result<Self::Ok, Self::Error> {
Err(SerializerError::UnserializableType { name: "&[u8]" })
}
fn serialize_none(self) -> Result<Self::Ok, Self::Error> {
Err(SerializerError::UnserializableType { name: "Option" })
}
fn serialize_some<T: ?Sized>(self, _value: &T) -> Result<Self::Ok, Self::Error>
where T: Serialize,
{
Err(SerializerError::UnserializableType { name: "Option" })
}
fn serialize_unit(self) -> Result<Self::Ok, Self::Error> {
Err(SerializerError::UnserializableType { name: "()" })
}
fn serialize_unit_struct(self, _name: &'static str) -> Result<Self::Ok, Self::Error> {
Err(SerializerError::UnserializableType { name: "unit struct" })
}
fn serialize_unit_variant(
self,
_name: &'static str,
_variant_index: u32,
_variant: &'static str
) -> Result<Self::Ok, Self::Error>
{
Err(SerializerError::UnserializableType { name: "unit variant" })
}
fn serialize_newtype_struct<T: ?Sized>(
self,
_name: &'static str,
value: &T
) -> Result<Self::Ok, Self::Error>
where T: Serialize,
{
value.serialize(self)
}
fn serialize_newtype_variant<T: ?Sized>(
self,
_name: &'static str,
_variant_index: u32,
_variant: &'static str,
_value: &T
) -> Result<Self::Ok, Self::Error>
where T: Serialize,
{
Err(SerializerError::UnserializableType { name: "newtype variant" })
}
fn serialize_seq(self, _len: Option<usize>) -> Result<Self::SerializeSeq, Self::Error> {
Err(SerializerError::UnserializableType { name: "sequence" })
}
fn serialize_tuple(self, _len: usize) -> Result<Self::SerializeTuple, Self::Error> {
Err(SerializerError::UnserializableType { name: "tuple" })
}
fn serialize_tuple_struct(
self,
_name: &'static str,
_len: usize
) -> Result<Self::SerializeTupleStruct, Self::Error>
{
Err(SerializerError::UnserializableType { name: "tuple struct" })
}
fn serialize_tuple_variant(
self,
_name: &'static str,
_variant_index: u32,
_variant: &'static str,
_len: usize
) -> Result<Self::SerializeTupleVariant, Self::Error>
{
Err(SerializerError::UnserializableType { name: "tuple variant" })
}
fn serialize_map(self, _len: Option<usize>) -> Result<Self::SerializeMap, Self::Error> {
Ok(FindDocumentIdMapSerializer {
id_attribute_name: self.id_attribute_name,
document_id: None,
current_key_name: None,
})
}
fn serialize_struct(
self,
_name: &'static str,
_len: usize
) -> Result<Self::SerializeStruct, Self::Error>
{
Ok(FindDocumentIdStructSerializer {
id_attribute_name: self.id_attribute_name,
document_id: None,
})
}
fn serialize_struct_variant(
self,
_name: &'static str,
_variant_index: u32,
_variant: &'static str,
_len: usize
) -> Result<Self::SerializeStructVariant, Self::Error>
{
Err(SerializerError::UnserializableType { name: "struct variant" })
}
}
pub struct FindDocumentIdMapSerializer<'a> {
id_attribute_name: &'a str,
document_id: Option<DocumentId>,
current_key_name: Option<String>,
}
impl<'a> ser::SerializeMap for FindDocumentIdMapSerializer<'a> {
type Ok = DocumentId;
type Error = SerializerError;
fn serialize_key<T: ?Sized>(&mut self, key: &T) -> Result<(), Self::Error>
where T: Serialize,
{
let key = key.serialize(KeyToStringSerializer)?;
self.current_key_name = Some(key);
Ok(())
}
fn serialize_value<T: ?Sized>(&mut self, value: &T) -> Result<(), Self::Error>
where T: Serialize,
{
let key = self.current_key_name.take().unwrap();
self.serialize_entry(&key, value)
}
fn serialize_entry<K: ?Sized, V: ?Sized>(
&mut self,
key: &K,
value: &V
) -> Result<(), Self::Error>
where K: Serialize, V: Serialize,
{
let key = key.serialize(KeyToStringSerializer)?;
if self.id_attribute_name == key {
// TODO is it possible to have multiple ids?
let id = bincode::serialize(value).unwrap();
let hash = calculate_hash(&id);
self.document_id = Some(DocumentId(hash));
}
Ok(())
}
fn end(self) -> Result<Self::Ok, Self::Error> {
match self.document_id {
Some(document_id) => Ok(document_id),
None => Err(SerializerError::DocumentIdNotFound)
}
}
}
pub struct FindDocumentIdStructSerializer<'a> {
id_attribute_name: &'a str,
document_id: Option<DocumentId>,
}
impl<'a> ser::SerializeStruct for FindDocumentIdStructSerializer<'a> {
type Ok = DocumentId;
type Error = SerializerError;
fn serialize_field<T: ?Sized>(
&mut self,
key: &'static str,
value: &T
) -> Result<(), Self::Error>
where T: Serialize,
{
if self.id_attribute_name == key {
// TODO can it be possible to have multiple ids?
let id = bincode::serialize(value).unwrap();
let hash = calculate_hash(&id);
self.document_id = Some(DocumentId(hash));
}
Ok(())
}
fn end(self) -> Result<Self::Ok, Self::Error> {
match self.document_id {
Some(document_id) => Ok(document_id),
None => Err(SerializerError::DocumentIdNotFound)
}
}
}

190
meilidb/src/database/serde/indexer_serializer.rs
View File

@ -1,190 +0,0 @@
use std::collections::HashSet;
use serde::Serialize;
use serde::ser;
use meilidb_core::{DocumentId, DocIndex};
use meilidb_tokenizer::{Tokenizer, Token, is_cjk};
use crate::database::update::DocumentUpdate;
use crate::database::serde::SerializerError;
use crate::database::schema::SchemaAttr;
pub struct IndexerSerializer<'a, 'b> {
pub update: &'a mut DocumentUpdate<'b>,
pub document_id: DocumentId,
pub attribute: SchemaAttr,
pub stop_words: &'a HashSet<String>,
}
impl<'a, 'b> ser::Serializer for IndexerSerializer<'a, 'b> {
type Ok = ();
type Error = SerializerError;
type SerializeSeq = ser::Impossible<Self::Ok, Self::Error>;
type SerializeTuple = ser::Impossible<Self::Ok, Self::Error>;
type SerializeTupleStruct = ser::Impossible<Self::Ok, Self::Error>;
type SerializeTupleVariant = ser::Impossible<Self::Ok, Self::Error>;
type SerializeMap = ser::Impossible<Self::Ok, Self::Error>;
type SerializeStruct = ser::Impossible<Self::Ok, Self::Error>;
type SerializeStructVariant = ser::Impossible<Self::Ok, Self::Error>;
forward_to_unserializable_type! {
bool => serialize_bool,
char => serialize_char,
i8 => serialize_i8,
i16 => serialize_i16,
i32 => serialize_i32,
i64 => serialize_i64,
u8 => serialize_u8,
u16 => serialize_u16,
u32 => serialize_u32,
u64 => serialize_u64,
f32 => serialize_f32,
f64 => serialize_f64,
}
fn serialize_str(self, v: &str) -> Result<Self::Ok, Self::Error> {
for token in Tokenizer::new(v) {
let Token { word, word_index, char_index } = token;
let document_id = self.document_id;
// FIXME must u32::try_from instead
let attribute = self.attribute.0;
let word_index = word_index as u16;
// insert the exact representation
let word_lower = word.to_lowercase();
let length = word.chars().count() as u16;
if self.stop_words.contains(&word_lower) { continue }
// and the unidecoded lowercased version
if !word_lower.chars().any(is_cjk) {
let word_unidecoded = unidecode::unidecode(word).to_lowercase();
let word_unidecoded = word_unidecoded.trim();
if word_lower != word_unidecoded {
let char_index = char_index as u16;
let char_length = length;
let doc_index = DocIndex { document_id, attribute, word_index, char_index, char_length };
self.update.insert_doc_index(word_unidecoded.as_bytes().to_vec(), doc_index)?;
}
}
let char_index = char_index as u16;
let char_length = length;
let doc_index = DocIndex { document_id, attribute, word_index, char_index, char_length };
self.update.insert_doc_index(word_lower.into_bytes(), doc_index)?;
}
Ok(())
}
fn serialize_bytes(self, _v: &[u8]) -> Result<Self::Ok, Self::Error> {
Err(SerializerError::UnserializableType { name: "&[u8]" })
}
fn serialize_none(self) -> Result<Self::Ok, Self::Error> {
Err(SerializerError::UnserializableType { name: "Option" })
}
fn serialize_some<T: ?Sized>(self, _value: &T) -> Result<Self::Ok, Self::Error>
where T: Serialize,
{
Err(SerializerError::UnserializableType { name: "Option" })
}
fn serialize_unit(self) -> Result<Self::Ok, Self::Error> {
Err(SerializerError::UnserializableType { name: "()" })
}
fn serialize_unit_struct(self, _name: &'static str) -> Result<Self::Ok, Self::Error> {
Err(SerializerError::UnserializableType { name: "unit struct" })
}
fn serialize_unit_variant(
self,
_name: &'static str,
_variant_index: u32,
_variant: &'static str
) -> Result<Self::Ok, Self::Error>
{
Err(SerializerError::UnserializableType { name: "unit variant" })
}
fn serialize_newtype_struct<T: ?Sized>(
self,
_name: &'static str,
value: &T
) -> Result<Self::Ok, Self::Error>
where T: Serialize,
{
value.serialize(self)
}
fn serialize_newtype_variant<T: ?Sized>(
self,
_name: &'static str,
_variant_index: u32,
_variant: &'static str,
_value: &T
) -> Result<Self::Ok, Self::Error>
where T: Serialize,
{
Err(SerializerError::UnserializableType { name: "newtype variant" })
}
fn serialize_seq(self, _len: Option<usize>) -> Result<Self::SerializeSeq, Self::Error> {
Err(SerializerError::UnserializableType { name: "seq" })
}
fn serialize_tuple(self, _len: usize) -> Result<Self::SerializeTuple, Self::Error> {
Err(SerializerError::UnserializableType { name: "tuple" })
}
fn serialize_tuple_struct(
self,
_name: &'static str,
_len: usize
) -> Result<Self::SerializeTupleStruct, Self::Error>
{
Err(SerializerError::UnserializableType { name: "tuple struct" })
}
fn serialize_tuple_variant(
self,
_name: &'static str,
_variant_index: u32,
_variant: &'static str,
_len: usize
) -> Result<Self::SerializeTupleVariant, Self::Error>
{
Err(SerializerError::UnserializableType { name: "tuple variant" })
}
fn serialize_map(self, _len: Option<usize>) -> Result<Self::SerializeMap, Self::Error> {
Err(SerializerError::UnserializableType { name: "map" })
}
fn serialize_struct(
self,
_name: &'static str,
_len: usize
) -> Result<Self::SerializeStruct, Self::Error>
{
Err(SerializerError::UnserializableType { name: "struct" })
}
fn serialize_struct_variant(
self,
_name: &'static str,
_variant_index: u32,
_variant: &'static str,
_len: usize
) -> Result<Self::SerializeStructVariant, Self::Error>
{
Err(SerializerError::UnserializableType { name: "struct variant" })
}
}

146
meilidb/src/database/serde/key_to_string.rs
View File

@ -1,146 +0,0 @@
use serde::Serialize;
use serde::ser;
use crate::database::serde::SerializerError;
pub struct KeyToStringSerializer;
impl ser::Serializer for KeyToStringSerializer {
type Ok = String;
type Error = SerializerError;
type SerializeSeq = ser::Impossible<Self::Ok, Self::Error>;
type SerializeTuple = ser::Impossible<Self::Ok, Self::Error>;
type SerializeTupleStruct = ser::Impossible<Self::Ok, Self::Error>;
type SerializeTupleVariant = ser::Impossible<Self::Ok, Self::Error>;
type SerializeMap = ser::Impossible<Self::Ok, Self::Error>;
type SerializeStruct = ser::Impossible<Self::Ok, Self::Error>;
type SerializeStructVariant = ser::Impossible<Self::Ok, Self::Error>;
forward_to_unserializable_type! {
bool => serialize_bool,
char => serialize_char,
i8 => serialize_i8,
i16 => serialize_i16,
i32 => serialize_i32,
i64 => serialize_i64,
u8 => serialize_u8,
u16 => serialize_u16,
u32 => serialize_u32,
u64 => serialize_u64,
f32 => serialize_f32,
f64 => serialize_f64,
}
fn serialize_str(self, value: &str) -> Result<Self::Ok, Self::Error> {
Ok(value.to_string())
}
fn serialize_bytes(self, _v: &[u8]) -> Result<Self::Ok, Self::Error> {
Err(SerializerError::UnserializableType { name: "&[u8]" })
}
fn serialize_none(self) -> Result<Self::Ok, Self::Error> {
Err(SerializerError::UnserializableType { name: "Option" })
}
fn serialize_some<T: ?Sized>(self, _value: &T) -> Result<Self::Ok, Self::Error>
where T: Serialize,
{
Err(SerializerError::UnserializableType { name: "Option" })
}
fn serialize_unit(self) -> Result<Self::Ok, Self::Error> {
Err(SerializerError::UnserializableType { name: "()" })
}
fn serialize_unit_struct(self, _name: &'static str) -> Result<Self::Ok, Self::Error> {
Err(SerializerError::UnserializableType { name: "unit struct" })
}
fn serialize_unit_variant(
self,
_name: &'static str,
_variant_index: u32,
_variant: &'static str
) -> Result<Self::Ok, Self::Error>
{
Err(SerializerError::UnserializableType { name: "unit variant" })
}
fn serialize_newtype_struct<T: ?Sized>(
self,
_name: &'static str,
value: &T
) -> Result<Self::Ok, Self::Error>
where T: Serialize,
{
value.serialize(self)
}
fn serialize_newtype_variant<T: ?Sized>(
self,
_name: &'static str,
_variant_index: u32,
_variant: &'static str,
_value: &T
) -> Result<Self::Ok, Self::Error>
where T: Serialize,
{
Err(SerializerError::UnserializableType { name: "newtype variant" })
}
fn serialize_seq(self, _len: Option<usize>) -> Result<Self::SerializeSeq, Self::Error> {
Err(SerializerError::UnserializableType { name: "sequence" })
}
fn serialize_tuple(self, _len: usize) -> Result<Self::SerializeTuple, Self::Error> {
Err(SerializerError::UnserializableType { name: "tuple" })
}
fn serialize_tuple_struct(
self,
_name: &'static str,
_len: usize
) -> Result<Self::SerializeTupleStruct, Self::Error>
{
Err(SerializerError::UnserializableType { name: "tuple struct" })
}
fn serialize_tuple_variant(
self,
_name: &'static str,
_variant_index: u32,
_variant: &'static str,
_len: usize
) -> Result<Self::SerializeTupleVariant, Self::Error>
{
Err(SerializerError::UnserializableType { name: "tuple variant" })
}
fn serialize_map(self, _len: Option<usize>) -> Result<Self::SerializeMap, Self::Error> {
Err(SerializerError::UnserializableType { name: "map" })
}
fn serialize_struct(
self,
_name: &'static str,
_len: usize
) -> Result<Self::SerializeStruct, Self::Error>
{
Err(SerializerError::UnserializableType { name: "struct" })
}
fn serialize_struct_variant(
self,
_name: &'static str,
_variant_index: u32,
_variant: &'static str,
_len: usize
) -> Result<Self::SerializeStructVariant, Self::Error>
{
Err(SerializerError::UnserializableType { name: "struct variant" })
}
}

65
meilidb/src/database/serde/mod.rs
View File

@ -1,65 +0,0 @@
use std::collections::hash_map::DefaultHasher;
use std::hash::{Hash, Hasher};
use std::error::Error;
use std::fmt;
use serde::ser;
macro_rules! forward_to_unserializable_type {
($($ty:ident => $se_method:ident,)*) => {
$(
fn $se_method(self, _v: $ty) -> Result<Self::Ok, Self::Error> {
Err(SerializerError::UnserializableType { name: "$ty" })
}
)*
}
}
pub mod find_id;
pub mod key_to_string;
pub mod value_to_number;
pub mod serializer;
pub mod indexer_serializer;
pub mod deserializer;
pub fn calculate_hash<T: Hash>(t: &T) -> u64 {
let mut s = DefaultHasher::new();
t.hash(&mut s);
s.finish()
}
#[derive(Debug)]
pub enum SerializerError {
DocumentIdNotFound,
UnserializableType { name: &'static str },
Custom(String),
}
impl ser::Error for SerializerError {
fn custom<T: fmt::Display>(msg: T) -> Self {
SerializerError::Custom(msg.to_string())
}
}
impl fmt::Display for SerializerError {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
match self {
SerializerError::DocumentIdNotFound => {
write!(f, "serialized document does not have an id according to the schema")
}
SerializerError::UnserializableType { name } => {
write!(f, "Only struct and map types are considered valid documents and
can be serialized, not {} types directly.", name)
},
SerializerError::Custom(s) => f.write_str(&s),
}
}
}
impl Error for SerializerError {}
impl From<String> for SerializerError {
fn from(value: String) -> SerializerError {
SerializerError::Custom(value)
}
}

282
meilidb/src/database/serde/serializer.rs
View File

@ -1,282 +0,0 @@
use std::collections::HashSet;
use serde::Serialize;
use serde::ser;
use crate::database::serde::indexer_serializer::IndexerSerializer;
use crate::database::serde::key_to_string::KeyToStringSerializer;
use crate::database::serde::value_to_number::ValueToNumberSerializer;
use crate::database::update::DocumentUpdate;
use crate::database::serde::SerializerError;
use crate::database::schema::Schema;
use meilidb_core::DocumentId;
pub struct Serializer<'a, 'b> {
pub schema: &'a Schema,
pub update: &'a mut DocumentUpdate<'b>,
pub document_id: DocumentId,
pub stop_words: &'a HashSet<String>,
}
impl<'a, 'b> ser::Serializer for Serializer<'a, 'b> {
type Ok = ();
type Error = SerializerError;
type SerializeSeq = ser::Impossible<Self::Ok, Self::Error>;
type SerializeTuple = ser::Impossible<Self::Ok, Self::Error>;
type SerializeTupleStruct = ser::Impossible<Self::Ok, Self::Error>;
type SerializeTupleVariant = ser::Impossible<Self::Ok, Self::Error>;
type SerializeMap = MapSerializer<'a, 'b>;
type SerializeStruct = StructSerializer<'a, 'b>;
type SerializeStructVariant = ser::Impossible<Self::Ok, Self::Error>;
forward_to_unserializable_type! {
bool => serialize_bool,
char => serialize_char,
i8 => serialize_i8,
i16 => serialize_i16,
i32 => serialize_i32,
i64 => serialize_i64,
u8 => serialize_u8,
u16 => serialize_u16,
u32 => serialize_u32,
u64 => serialize_u64,
f32 => serialize_f32,
f64 => serialize_f64,
}
fn serialize_str(self, _v: &str) -> Result<Self::Ok, Self::Error> {
Err(SerializerError::UnserializableType { name: "str" })
}
fn serialize_bytes(self, _v: &[u8]) -> Result<Self::Ok, Self::Error> {
Err(SerializerError::UnserializableType { name: "&[u8]" })
}
fn serialize_none(self) -> Result<Self::Ok, Self::Error> {
Err(SerializerError::UnserializableType { name: "Option" })
}
fn serialize_some<T: ?Sized>(self, _value: &T) -> Result<Self::Ok, Self::Error>
where T: Serialize,
{
Err(SerializerError::UnserializableType { name: "Option" })
}
fn serialize_unit(self) -> Result<Self::Ok, Self::Error> {
Err(SerializerError::UnserializableType { name: "()" })
}
fn serialize_unit_struct(self, _name: &'static str) -> Result<Self::Ok, Self::Error> {
Err(SerializerError::UnserializableType { name: "unit struct" })
}
fn serialize_unit_variant(
self,
_name: &'static str,
_variant_index: u32,
_variant: &'static str
) -> Result<Self::Ok, Self::Error>
{
Err(SerializerError::UnserializableType { name: "unit variant" })
}
fn serialize_newtype_struct<T: ?Sized>(
self,
_name: &'static str,
value: &T
) -> Result<Self::Ok, Self::Error>
where T: Serialize,
{
value.serialize(self)
}
fn serialize_newtype_variant<T: ?Sized>(
self,
_name: &'static str,
_variant_index: u32,
_variant: &'static str,
_value: &T
) -> Result<Self::Ok, Self::Error>
where T: Serialize,
{
Err(SerializerError::UnserializableType { name: "newtype variant" })
}
fn serialize_seq(self, _len: Option<usize>) -> Result<Self::SerializeSeq, Self::Error> {
Err(SerializerError::UnserializableType { name: "sequence" })
}
fn serialize_tuple(self, _len: usize) -> Result<Self::SerializeTuple, Self::Error> {
Err(SerializerError::UnserializableType { name: "tuple" })
}
fn serialize_tuple_struct(
self,
_name: &'static str,
_len: usize
) -> Result<Self::SerializeTupleStruct, Self::Error>
{
Err(SerializerError::UnserializableType { name: "tuple struct" })
}
fn serialize_tuple_variant(
self,
_name: &'static str,
_variant_index: u32,
_variant: &'static str,
_len: usize
) -> Result<Self::SerializeTupleVariant, Self::Error>
{
Err(SerializerError::UnserializableType { name: "tuple variant" })
}
fn serialize_map(self, _len: Option<usize>) -> Result<Self::SerializeMap, Self::Error> {
Ok(MapSerializer {
schema: self.schema,
document_id: self.document_id,
update: self.update,
stop_words: self.stop_words,
current_key_name: None,
})
}
fn serialize_struct(
self,
_name: &'static str,
_len: usize
) -> Result<Self::SerializeStruct, Self::Error>
{
Ok(StructSerializer {
schema: self.schema,
document_id: self.document_id,
update: self.update,
stop_words: self.stop_words,
})
}
fn serialize_struct_variant(
self,
_name: &'static str,
_variant_index: u32,
_variant: &'static str,
_len: usize
) -> Result<Self::SerializeStructVariant, Self::Error>
{
Err(SerializerError::UnserializableType { name: "struct variant" })
}
}
pub struct MapSerializer<'a, 'b> {
pub schema: &'a Schema,
pub document_id: DocumentId,
pub update: &'a mut DocumentUpdate<'b>,
pub stop_words: &'a HashSet<String>,
pub current_key_name: Option<String>,
}
impl<'a, 'b> ser::SerializeMap for MapSerializer<'a, 'b> {
type Ok = ();
type Error = SerializerError;
fn serialize_key<T: ?Sized>(&mut self, key: &T) -> Result<(), Self::Error>
where T: Serialize,
{
let key = key.serialize(KeyToStringSerializer)?;
self.current_key_name = Some(key);
Ok(())
}
fn serialize_value<T: ?Sized>(&mut self, value: &T) -> Result<(), Self::Error>
where T: Serialize,
{
let key = self.current_key_name.take().unwrap();
self.serialize_entry(&key, value)
}
fn serialize_entry<K: ?Sized, V: ?Sized>(
&mut self,
key: &K,
value: &V,
) -> Result<(), Self::Error>
where K: Serialize, V: Serialize,
{
let key = key.serialize(KeyToStringSerializer)?;
if let Some(attr) = self.schema.attribute(key) {
let props = self.schema.props(attr);
if props.is_stored() {
let value = bincode::serialize(value).unwrap();
self.update.insert_attribute_value(attr, &value)?;
}
if props.is_indexed() {
let serializer = IndexerSerializer {
update: self.update,
document_id: self.document_id,
attribute: attr,
stop_words: self.stop_words,
};
value.serialize(serializer)?;
}
if props.is_ranked() {
let number = value.serialize(ValueToNumberSerializer)?;
self.update.register_ranked_attribute(attr, number)?;
}
}
Ok(())
}
fn end(self) -> Result<Self::Ok, Self::Error> {
Ok(())
}
}
pub struct StructSerializer<'a, 'b> {
pub schema: &'a Schema,
pub document_id: DocumentId,
pub update: &'a mut DocumentUpdate<'b>,
pub stop_words: &'a HashSet<String>,
}
impl<'a, 'b> ser::SerializeStruct for StructSerializer<'a, 'b> {
type Ok = ();
type Error = SerializerError;
fn serialize_field<T: ?Sized>(
&mut self,
key: &'static str,
value: &T
) -> Result<(), Self::Error>
where T: Serialize,
{
if let Some(attr) = self.schema.attribute(key) {
let props = self.schema.props(attr);
if props.is_stored() {
let value = bincode::serialize(value).unwrap();
self.update.insert_attribute_value(attr, &value)?;
}
if props.is_indexed() {
let serializer = IndexerSerializer {
update: self.update,
document_id: self.document_id,
attribute: attr,
stop_words: self.stop_words,
};
value.serialize(serializer)?;
}
if props.is_ranked() {
let integer = value.serialize(ValueToNumberSerializer)?;
self.update.register_ranked_attribute(attr, integer)?;
}
}
Ok(())
}
fn end(self) -> Result<Self::Ok, Self::Error> {
Ok(())
}
}

176
meilidb/src/database/serde/value_to_number.rs
View File

@ -1,176 +0,0 @@
use std::str::FromStr;
use serde::Serialize;
use serde::{ser, ser::Error};
use crate::database::serde::SerializerError;
use crate::database::Number;
pub struct ValueToNumberSerializer;
impl ser::Serializer for ValueToNumberSerializer {
type Ok = Number;
type Error = SerializerError;
type SerializeSeq = ser::Impossible<Self::Ok, Self::Error>;
type SerializeTuple = ser::Impossible<Self::Ok, Self::Error>;
type SerializeTupleStruct = ser::Impossible<Self::Ok, Self::Error>;
type SerializeTupleVariant = ser::Impossible<Self::Ok, Self::Error>;
type SerializeMap = ser::Impossible<Self::Ok, Self::Error>;
type SerializeStruct = ser::Impossible<Self::Ok, Self::Error>;
type SerializeStructVariant = ser::Impossible<Self::Ok, Self::Error>;
forward_to_unserializable_type! {
bool => serialize_bool,
char => serialize_char,
}
fn serialize_i8(self, value: i8) -> Result<Self::Ok, Self::Error> {
Ok(Number::Signed(value as i64))
}
fn serialize_i16(self, value: i16) -> Result<Self::Ok, Self::Error> {
Ok(Number::Signed(value as i64))
}
fn serialize_i32(self, value: i32) -> Result<Self::Ok, Self::Error> {
Ok(Number::Signed(value as i64))
}
fn serialize_i64(self, value: i64) -> Result<Self::Ok, Self::Error> {
Ok(Number::Signed(value as i64))
}
fn serialize_u8(self, value: u8) -> Result<Self::Ok, Self::Error> {
Ok(Number::Unsigned(value as u64))
}
fn serialize_u16(self, value: u16) -> Result<Self::Ok, Self::Error> {
Ok(Number::Unsigned(value as u64))
}
fn serialize_u32(self, value: u32) -> Result<Self::Ok, Self::Error> {
Ok(Number::Unsigned(value as u64))
}
fn serialize_u64(self, value: u64) -> Result<Self::Ok, Self::Error> {
Ok(Number::Unsigned(value as u64))
}
fn serialize_f32(self, value: f32) -> Result<Self::Ok, Self::Error> {
Ok(Number::Float(value as f64))
}
fn serialize_f64(self, value: f64) -> Result<Self::Ok, Self::Error> {
Ok(Number::Float(value))
}
fn serialize_str(self, value: &str) -> Result<Self::Ok, Self::Error> {
Number::from_str(value).map_err(SerializerError::custom)
}
fn serialize_bytes(self, _v: &[u8]) -> Result<Self::Ok, Self::Error> {
Err(SerializerError::UnserializableType { name: "&[u8]" })
}
fn serialize_none(self) -> Result<Self::Ok, Self::Error> {
Err(SerializerError::UnserializableType { name: "Option" })
}
fn serialize_some<T: ?Sized>(self, _value: &T) -> Result<Self::Ok, Self::Error>
where T: Serialize,
{
Err(SerializerError::UnserializableType { name: "Option" })
}
fn serialize_unit(self) -> Result<Self::Ok, Self::Error> {
Err(SerializerError::UnserializableType { name: "()" })
}
fn serialize_unit_struct(self, _name: &'static str) -> Result<Self::Ok, Self::Error> {
Err(SerializerError::UnserializableType { name: "unit struct" })
}
fn serialize_unit_variant(
self,
_name: &'static str,
_variant_index: u32,
_variant: &'static str
) -> Result<Self::Ok, Self::Error>
{
Err(SerializerError::UnserializableType { name: "unit variant" })
}
fn serialize_newtype_struct<T: ?Sized>(
self,
_name: &'static str,
value: &T
) -> Result<Self::Ok, Self::Error>
where T: Serialize,
{
value.serialize(self)
}
fn serialize_newtype_variant<T: ?Sized>(
self,
_name: &'static str,
_variant_index: u32,
_variant: &'static str,
_value: &T
) -> Result<Self::Ok, Self::Error>
where T: Serialize,
{
Err(SerializerError::UnserializableType { name: "newtype variant" })
}
fn serialize_seq(self, _len: Option<usize>) -> Result<Self::SerializeSeq, Self::Error> {
Err(SerializerError::UnserializableType { name: "sequence" })
}
fn serialize_tuple(self, _len: usize) -> Result<Self::SerializeTuple, Self::Error> {
Err(SerializerError::UnserializableType { name: "tuple" })
}
fn serialize_tuple_struct(
self,
_name: &'static str,
_len: usize
) -> Result<Self::SerializeTupleStruct, Self::Error>
{
Err(SerializerError::UnserializableType { name: "tuple struct" })
}
fn serialize_tuple_variant(
self,
_name: &'static str,
_variant_index: u32,
_variant: &'static str,
_len: usize
) -> Result<Self::SerializeTupleVariant, Self::Error>
{
Err(SerializerError::UnserializableType { name: "tuple variant" })
}
fn serialize_map(self, _len: Option<usize>) -> Result<Self::SerializeMap, Self::Error> {
Err(SerializerError::UnserializableType { name: "map" })
}
fn serialize_struct(
self,
_name: &'static str,
_len: usize
) -> Result<Self::SerializeStruct, Self::Error>
{
Err(SerializerError::UnserializableType { name: "struct" })
}
fn serialize_struct_variant(
self,
_name: &'static str,
_variant_index: u32,
_variant: &'static str,
_len: usize
) -> Result<Self::SerializeStructVariant, Self::Error>
{
Err(SerializerError::UnserializableType { name: "struct variant" })
}
}

55
meilidb/src/database/update/index_event.rs
View File

@ -1,55 +0,0 @@
use std::error::Error;
use byteorder::{ReadBytesExt, WriteBytesExt};
use meilidb_core::shared_data_cursor::{SharedDataCursor, FromSharedDataCursor};
use meilidb_core::write_to_bytes::WriteToBytes;
use meilidb_core::data::DocIds;
use crate::database::Index;
pub enum WriteIndexEvent<'a> {
RemovedDocuments(&'a DocIds),
UpdatedDocuments(&'a Index),
}
impl<'a> WriteToBytes for WriteIndexEvent<'a> {
fn write_to_bytes(&self, bytes: &mut Vec<u8>) {
match self {
WriteIndexEvent::RemovedDocuments(doc_ids) => {
let _ = bytes.write_u8(0);
doc_ids.write_to_bytes(bytes);
},
WriteIndexEvent::UpdatedDocuments(index) => {
let _ = bytes.write_u8(1);
index.write_to_bytes(bytes);
}
}
}
}
pub enum ReadIndexEvent {
RemovedDocuments(DocIds),
UpdatedDocuments(Index),
}
impl ReadIndexEvent {
pub fn updated_documents(self) -> Option<Index> {
use ReadIndexEvent::*;
match self {
RemovedDocuments(_) => None,
UpdatedDocuments(index) => Some(index),
}
}
}
impl FromSharedDataCursor for ReadIndexEvent {
type Error = Box<Error>;
fn from_shared_data_cursor(cursor: &mut SharedDataCursor) -> Result<Self, Self::Error> {
match cursor.read_u8()? {
0 => DocIds::from_shared_data_cursor(cursor).map(ReadIndexEvent::RemovedDocuments),
1 => Index::from_shared_data_cursor(cursor).map(ReadIndexEvent::UpdatedDocuments),
_ => unreachable!(),
}
}
}

234
meilidb/src/database/update/mod.rs
View File

@ -1,234 +0,0 @@
use std::collections::{HashSet, BTreeMap};
use std::error::Error;
use rocksdb::rocksdb::{Writable, WriteBatch};
use hashbrown::hash_map::HashMap;
use sdset::{Set, SetBuf};
use serde::Serialize;
use meilidb_core::write_to_bytes::WriteToBytes;
use meilidb_core::data::DocIds;
use meilidb_core::{IndexBuilder, DocumentId, DocIndex};
use crate::database::document_key::{DocumentKey, DocumentKeyAttr};
use crate::database::serde::serializer::Serializer;
use crate::database::serde::SerializerError;
use crate::database::schema::SchemaAttr;
use crate::database::schema::Schema;
use crate::database::{DATA_INDEX, DATA_RANKED_MAP};
use crate::database::{RankedMap, Number};
pub use self::index_event::{ReadIndexEvent, WriteIndexEvent};
pub use self::ranked_map_event::{ReadRankedMapEvent, WriteRankedMapEvent};
mod index_event;
mod ranked_map_event;
pub type Token = Vec<u8>; // TODO could be replaced by a SmallVec
pub struct Update {
schema: Schema,
raw_builder: RawUpdateBuilder,
}
impl Update {
pub(crate) fn new(schema: Schema) -> Update {
Update { schema, raw_builder: RawUpdateBuilder::new() }
}
pub fn update_document<T>(
&mut self,
document: T,
stop_words: &HashSet<String>,
) -> Result<DocumentId, SerializerError>
where T: Serialize,
{
let document_id = self.schema.document_id(&document)?;
let serializer = Serializer {
schema: &self.schema,
document_id: document_id,
update: &mut self.raw_builder.document_update(document_id)?,
stop_words: stop_words,
};
document.serialize(serializer)?;
Ok(document_id)
}
pub fn remove_document<T>(&mut self, document: T) -> Result<DocumentId, SerializerError>
where T: Serialize,
{
let document_id = self.schema.document_id(&document)?;
self.raw_builder.document_update(document_id)?.remove()?;
Ok(document_id)
}
pub(crate) fn build(self) -> Result<WriteBatch, Box<Error>> {
self.raw_builder.build()
}
}
#[derive(Copy, Clone, PartialEq, Eq)]
enum UpdateType {
Updated,
Deleted,
}
use UpdateType::{Updated, Deleted};
pub struct RawUpdateBuilder {
documents_update: HashMap<DocumentId, UpdateType>,
documents_ranked_fields: RankedMap,
indexed_words: BTreeMap<Token, Vec<DocIndex>>,
batch: WriteBatch,
}
impl RawUpdateBuilder {
pub fn new() -> RawUpdateBuilder {
RawUpdateBuilder {
documents_update: HashMap::new(),
documents_ranked_fields: HashMap::new(),
indexed_words: BTreeMap::new(),
batch: WriteBatch::new(),
}
}
pub fn document_update(&mut self, document_id: DocumentId) -> Result<DocumentUpdate, SerializerError> {
use serde::ser::Error;
match self.documents_update.get(&document_id) {
Some(Deleted) | None => Ok(DocumentUpdate { document_id, inner: self }),
Some(Updated) => Err(SerializerError::custom(
"This document has already been removed and cannot be updated in the same update"
)),
}
}
pub fn build(self) -> Result<WriteBatch, Box<Error>> {
// create the list of all the removed documents
let removed_documents = {
let mut document_ids = Vec::new();
for (id, update_type) in self.documents_update {
if update_type == Deleted {
document_ids.push(id);
}
}
document_ids.sort_unstable();
let setbuf = SetBuf::new_unchecked(document_ids);
DocIds::new(&setbuf)
};
// create the Index of all the document updates
let index = {
let mut builder = IndexBuilder::new();
for (key, mut indexes) in self.indexed_words {
indexes.sort_unstable();
let indexes = Set::new_unchecked(&indexes);
builder.insert(key, indexes).unwrap();
}
builder.build()
};
// WARN: removed documents must absolutely
// be merged *before* document updates
// === index ===
if !removed_documents.is_empty() {
// remove the documents using the appropriate IndexEvent
let event_bytes = WriteIndexEvent::RemovedDocuments(&removed_documents).into_bytes();
self.batch.merge(DATA_INDEX, &event_bytes)?;
}
// update the documents using the appropriate IndexEvent
let event_bytes = WriteIndexEvent::UpdatedDocuments(&index).into_bytes();
self.batch.merge(DATA_INDEX, &event_bytes)?;
// === ranked map ===
if !removed_documents.is_empty() {
// update the ranked map using the appropriate RankedMapEvent
let event_bytes = WriteRankedMapEvent::RemovedDocuments(&removed_documents).into_bytes();
self.batch.merge(DATA_RANKED_MAP, &event_bytes)?;
}
// update the documents using the appropriate IndexEvent
let event_bytes = WriteRankedMapEvent::UpdatedDocuments(&self.documents_ranked_fields).into_bytes();
self.batch.merge(DATA_RANKED_MAP, &event_bytes)?;
Ok(self.batch)
}
}
pub struct DocumentUpdate<'a> {
document_id: DocumentId,
inner: &'a mut RawUpdateBuilder,
}
impl<'a> DocumentUpdate<'a> {
pub fn remove(&mut self) -> Result<(), SerializerError> {
use serde::ser::Error;
if let Updated = self.inner.documents_update.entry(self.document_id).or_insert(Deleted) {
return Err(SerializerError::custom(
"This document has already been updated and cannot be removed in the same update"
));
}
let start = DocumentKey::new(self.document_id).with_attribute_min();
let end = DocumentKey::new(self.document_id).with_attribute_max(); // FIXME max + 1
self.inner.batch.delete_range(start.as_ref(), end.as_ref())?;
Ok(())
}
pub fn insert_attribute_value(&mut self, attr: SchemaAttr, value: &[u8]) -> Result<(), SerializerError> {
use serde::ser::Error;
if let Deleted = self.inner.documents_update.entry(self.document_id).or_insert(Updated) {
return Err(SerializerError::custom(
"This document has already been deleted and cannot be updated in the same update"
));
}
let key = DocumentKeyAttr::new(self.document_id, attr);
self.inner.batch.put(key.as_ref(), &value)?;
Ok(())
}
pub fn insert_doc_index(&mut self, token: Token, doc_index: DocIndex) -> Result<(), SerializerError> {
use serde::ser::Error;
if let Deleted = self.inner.documents_update.entry(self.document_id).or_insert(Updated) {
return Err(SerializerError::custom(
"This document has already been deleted and cannot be updated in the same update"
));
}
self.inner.indexed_words.entry(token).or_insert_with(Vec::new).push(doc_index);
Ok(())
}
pub fn register_ranked_attribute(
&mut self,
attr: SchemaAttr,
number: Number,
) -> Result<(), SerializerError>
{
use serde::ser::Error;
if let Deleted = self.inner.documents_update.entry(self.document_id).or_insert(Updated) {
return Err(SerializerError::custom(
"This document has already been deleted, ranked attributes cannot be added in the same update"
));
}
self.inner.documents_ranked_fields.insert((self.document_id, attr), number);
Ok(())
}
}

58
meilidb/src/database/update/ranked_map_event.rs
View File

@ -1,58 +0,0 @@
use std::error::Error;
use byteorder::{ReadBytesExt, WriteBytesExt};
use meilidb_core::shared_data_cursor::{SharedDataCursor, FromSharedDataCursor};
use meilidb_core::write_to_bytes::WriteToBytes;
use meilidb_core::data::DocIds;
use crate::database::RankedMap;
pub enum WriteRankedMapEvent<'a> {
RemovedDocuments(&'a DocIds),
UpdatedDocuments(&'a RankedMap),
}
impl<'a> WriteToBytes for WriteRankedMapEvent<'a> {
fn write_to_bytes(&self, bytes: &mut Vec<u8>) {
match self {
WriteRankedMapEvent::RemovedDocuments(doc_ids) => {
let _ = bytes.write_u8(0);
doc_ids.write_to_bytes(bytes);
},
WriteRankedMapEvent::UpdatedDocuments(ranked_map) => {
let _ = bytes.write_u8(1);
bincode::serialize_into(bytes, ranked_map).unwrap()
}
}
}
}
pub enum ReadRankedMapEvent {
RemovedDocuments(DocIds),
UpdatedDocuments(RankedMap),
}
impl ReadRankedMapEvent {
pub fn updated_documents(self) -> Option<RankedMap> {
use ReadRankedMapEvent::*;
match self {
RemovedDocuments(_) => None,
UpdatedDocuments(ranked_map) => Some(ranked_map),
}
}
}
impl FromSharedDataCursor for ReadRankedMapEvent {
type Error = Box<Error>;
fn from_shared_data_cursor(cursor: &mut SharedDataCursor) -> Result<Self, Self::Error> {
match cursor.read_u8()? {
0 => DocIds::from_shared_data_cursor(cursor).map(ReadRankedMapEvent::RemovedDocuments),
1 => {
let ranked_map = bincode::deserialize_from(cursor)?;
Ok(ReadRankedMapEvent::UpdatedDocuments(ranked_map))
},
_ => unreachable!(),
}
}
}

199
meilidb/src/database/view.rs
View File

@ -1,199 +0,0 @@
use std::error::Error;
use std::path::Path;
use std::ops::Deref;
use std::{fmt, marker};
use rocksdb::rocksdb_options::{ReadOptions, EnvOptions, ColumnFamilyOptions};
use rocksdb::rocksdb::{DB, DBVector, Snapshot, SeekKey, SstFileWriter};
use serde::de::DeserializeOwned;
use meilidb_core::{Index, QueryBuilder, DocumentId};
use crate::database::{retrieve_data_schema, retrieve_data_index, retrieve_data_ranked_map, retrieve_config};
use crate::database::serde::deserializer::Deserializer;
use crate::database::{DocumentKey, DocumentKeyAttr};
use crate::database::schema::Schema;
use crate::database::RankedMap;
use crate::database::Config;
pub struct DatabaseView<D>
where D: Deref<Target=DB>
{
snapshot: Snapshot<D>,
index: Index,
ranked_map: RankedMap,
schema: Schema,
config: Config,
}
impl<D> DatabaseView<D>
where D: Deref<Target=DB>
{
pub fn new(snapshot: Snapshot<D>) -> Result<DatabaseView<D>, Box<Error>> {
let schema = retrieve_data_schema(&snapshot)?;
let index = retrieve_data_index(&snapshot)?;
let ranked_map = retrieve_data_ranked_map(&snapshot)?;
let config = retrieve_config(&snapshot)?;
Ok(DatabaseView { snapshot, index, ranked_map, schema, config })
}
pub fn schema(&self) -> &Schema {
&self.schema
}
pub fn index(&self) -> &Index {
&self.index
}
pub fn ranked_map(&self) -> &RankedMap {
&self.ranked_map
}
pub fn into_snapshot(self) -> Snapshot<D> {
self.snapshot
}
pub fn snapshot(&self) -> &Snapshot<D> {
&self.snapshot
}
pub fn config(&self) -> &Config {
&self.config
}
pub fn get(&self, key: &[u8]) -> Result<Option<DBVector>, Box<Error>> {
Ok(self.snapshot.get(key)?)
}
pub fn dump_all<P: AsRef<Path>>(&self, path: P) -> Result<(), Box<Error>> {
let path = path.as_ref().to_string_lossy();
let env_options = EnvOptions::new();
let column_family_options = ColumnFamilyOptions::new();
let mut file_writer = SstFileWriter::new(env_options, column_family_options);
file_writer.open(&path)?;
let mut iter = self.snapshot.iter();
iter.seek(SeekKey::Start);
for (key, value) in &mut iter {
file_writer.put(&key, &value)?;
}
file_writer.finish()?;
Ok(())
}
pub fn query_builder(&self) -> QueryBuilder {
QueryBuilder::new(self.index())
}
pub fn raw_field_by_document_id(
&self,
name: &str,
id: DocumentId
) -> Result<Option<Vec<u8>>, Box<Error>>
{
let attr = self.schema.attribute(name).ok_or("field not found")?;
let key = DocumentKeyAttr::new(id, attr);
let vector = self.snapshot.get(key.as_ref())?;
Ok(vector.map(|v| v.to_vec()))
}
pub fn document_by_id<T>(&self, id: DocumentId) -> Result<T, Box<Error>>
where T: DeserializeOwned,
{
let mut deserializer = Deserializer::new(&self.snapshot, &self.schema, id);
Ok(T::deserialize(&mut deserializer)?)
}
pub fn documents_by_id<T, I>(&self, ids: I) -> DocumentIter<D, T, I::IntoIter>
where T: DeserializeOwned,
I: IntoIterator<Item=DocumentId>,
{
DocumentIter {
database_view: self,
document_ids: ids.into_iter(),
_phantom: marker::PhantomData,
}
}
}
impl<D> fmt::Debug for DatabaseView<D>
where D: Deref<Target=DB>
{
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
let mut options = ReadOptions::new();
let lower = DocumentKey::new(DocumentId(0));
options.set_iterate_lower_bound(lower.as_ref());
let mut iter = self.snapshot.iter_opt(options);
iter.seek(SeekKey::Start);
let iter = iter.map(|(key, _)| DocumentKeyAttr::from_bytes(&key));
if f.alternate() {
writeln!(f, "DatabaseView(")?;
} else {
write!(f, "DatabaseView(")?;
}
self.schema.fmt(f)?;
if f.alternate() {
writeln!(f, ",")?;
} else {
write!(f, ", ")?;
}
f.debug_list().entries(iter).finish()?;
write!(f, ")")
}
}
// TODO this is just an iter::Map !!!
pub struct DocumentIter<'a, D, T, I>
where D: Deref<Target=DB>
{
database_view: &'a DatabaseView<D>,
document_ids: I,
_phantom: marker::PhantomData<T>,
}
impl<'a, D, T, I> Iterator for DocumentIter<'a, D, T, I>
where D: Deref<Target=DB>,
T: DeserializeOwned,
I: Iterator<Item=DocumentId>,
{
type Item = Result<T, Box<Error>>;
fn size_hint(&self) -> (usize, Option<usize>) {
self.document_ids.size_hint()
}
fn next(&mut self) -> Option<Self::Item> {
match self.document_ids.next() {
Some(id) => Some(self.database_view.document_by_id(id)),
None => None
}
}
}
impl<'a, D, T, I> ExactSizeIterator for DocumentIter<'a, D, T, I>
where D: Deref<Target=DB>,
T: DeserializeOwned,
I: ExactSizeIterator + Iterator<Item=DocumentId>,
{ }
impl<'a, D, T, I> DoubleEndedIterator for DocumentIter<'a, D, T, I>
where D: Deref<Target=DB>,
T: DeserializeOwned,
I: DoubleEndedIterator + Iterator<Item=DocumentId>,
{
fn next_back(&mut self) -> Option<Self::Item> {
match self.document_ids.next_back() {
Some(id) => Some(self.database_view.document_by_id(id)),
None => None
}
}
}

3
meilidb/src/lib.rs
View File

@ -1,10 +1,7 @@
#![cfg_attr(feature = "nightly", feature(test))] #![cfg_attr(feature = "nightly", feature(test))]
pub mod database;
mod common_words; mod common_words;
mod sort_by_attr; mod sort_by_attr;
pub use rocksdb;
pub use self::sort_by_attr::SortByAttr; pub use self::sort_by_attr::SortByAttr;
pub use self::common_words::CommonWords; pub use self::common_words::CommonWords;