Feat/restore revision (#1549)

* chore: write snapshot

* chore: add tests

* chore: sync close

* chore: restore from snapshot

* chore: delete invalid revisions after restored from snapshot

* chore: create default view if it fail to deserialize view's revisions when there is no snapshot

* chore: auto generate snapshot

Co-authored-by: nathan <[email protected]>

frontend/app_flowy/lib/plugins/grid/application/cell/text_cell_bloc.dart

@@ -18,8 +18,10 @@ class TextCellBloc extends Bloc<TextCellEvent, TextCellState> {
             _startListening();
           },
           updateText: (text) {
-            cellController.saveCellData(text);
-            emit(state.copyWith(content: text));
+            if (state.content != text) {
+              cellController.saveCellData(text);
+              emit(state.copyWith(content: text));
+            }
           },
           didReceiveCellUpdate: (content) {
             emit(state.copyWith(content: content));

frontend/app_flowy/lib/plugins/grid/presentation/widgets/cell/text_cell.dart

@@ -65,10 +65,6 @@ class _GridTextCellState extends GridFocusNodeCellState<GridTextCell> {
           child: TextField(
             controller: _controller,
             focusNode: focusNode,
-            onSubmitted: (text) => _cellBloc.add(
-              TextCellEvent.updateText(text),
-            ),
-            onEditingComplete: () => focusNode.unfocus(),
             maxLines: null,
             style: Theme.of(context).textTheme.bodyMedium,
             decoration: InputDecoration(
@@ -99,4 +95,12 @@ class _GridTextCellState extends GridFocusNodeCellState<GridTextCell> {
   void onInsert(String value) {
     _cellBloc.add(TextCellEvent.updateText(value));
   }
+
+  @override
+  Future<void> focusChanged() {
+    _cellBloc.add(
+      TextCellEvent.updateText(_controller.text),
+    );
+    return super.focusChanged();
+  }
 }

frontend/app_flowy/test/bloc_test/home_test/app_bloc_test.dart

@@ -133,35 +133,35 @@ void main() {
     workspaceSetting.latestView.id == document1.id;
   });
 
-  test('open latest grid test', () async {
+  test('open latest document test', () async {
     final app = await testContext.createTestApp();
     final bloc = AppBloc(app: app)..add(const AppEvent.initial());
     await blocResponseFuture();
 
-    bloc.add(AppEvent.createView("grid 1", GridPluginBuilder()));
+    bloc.add(AppEvent.createView("document 1", DocumentPluginBuilder()));
     await blocResponseFuture();
-    final grid1 = bloc.state.latestCreatedView;
-    assert(grid1!.name == "grid 1");
+    final document = bloc.state.latestCreatedView;
+    assert(document!.name == "document 1");
 
     bloc.add(AppEvent.createView("grid 2", GridPluginBuilder()));
     await blocResponseFuture();
-    final grid2 = bloc.state.latestCreatedView;
-    assert(grid2!.name == "grid 2");
+    final grid = bloc.state.latestCreatedView;
+    assert(grid!.name == "grid 2");
 
     var workspaceSetting = await FolderEventReadCurrentWorkspace()
         .send()
         .then((result) => result.fold((l) => l, (r) => throw Exception()));
-    workspaceSetting.latestView.id == grid1!.id;
+    workspaceSetting.latestView.id == grid!.id;
 
     // Open grid 1
     // ignore: unused_local_variable
-    final documentBloc = DocumentBloc(view: grid1)
+    final documentBloc = DocumentBloc(view: document!)
       ..add(const DocumentEvent.initial());
     await blocResponseFuture();
 
     workspaceSetting = await FolderEventReadCurrentWorkspace()
         .send()
         .then((result) => result.fold((l) => l, (r) => throw Exception()));
-    workspaceSetting.latestView.id == grid1.id;
+    workspaceSetting.latestView.id == document.id;
   });
 }

frontend/rust-lib/Cargo.lock

@@ -84,6 +84,17 @@ dependencies = [
  "syn",
 ]
 
+[[package]]
+name = "async-trait"
+version = "0.1.59"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "31e6e93155431f3931513b243d371981bb2770112b370c82745a1d19d2f99364"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "atomic"
 version = "0.5.1"
@@ -1085,6 +1096,7 @@ dependencies = [
  "flowy-error",
  "flowy-http-model",
  "flowy-revision",
+ "futures",
  "futures-util",
  "lib-infra",
  "lib-ws",
@@ -1768,6 +1780,7 @@ dependencies = [
 name = "lib-infra"
 version = "0.1.0"
 dependencies = [
+ "async-trait",
  "bytes",
  "chrono",
  "futures-core",
@@ -2469,11 +2482,11 @@ checksum = "dbf0c48bc1d91375ae5c3cd81e3722dff1abcf81a30960240640d223f59fe0e5"
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.36"
+version = "1.0.47"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c7342d5883fbccae1cc37a2353b09c87c9b0f3afd73f5fb9bba687a1f733b029"
+checksum = "5ea3d908b0e36316caf9e9e2c4625cdde190a7e6f440d794667ed17a1855e725"
 dependencies = [
- "unicode-xid",
+ "unicode-ident",
 ]
 
 [[package]]
@@ -3155,13 +3168,13 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "1.0.85"
+version = "1.0.105"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a684ac3dcd8913827e18cd09a68384ee66c1de24157e3c556c9ab16d85695fb7"
+checksum = "60b9b43d45702de4c839cb9b51d9f529c5dd26a4aff255b42b1ebc03e88ee908"
 dependencies = [
  "proc-macro2",
  "quote",
- "unicode-xid",
+ "unicode-ident",
 ]
 
 [[package]]
@@ -3602,6 +3615,12 @@ version = "0.3.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1a01404663e3db436ed2746d9fefef640d868edae3cceb81c3b8d5732fda678f"
 
+[[package]]
+name = "unicode-ident"
+version = "1.0.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6ceab39d59e4c9499d4e5a8ee0e2735b891bb7308ac83dfb4e80cad195c9f6f3"
+
 [[package]]
 name = "unicode-normalization"
 version = "0.1.19"
@@ -3623,12 +3642,6 @@ version = "0.1.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3ed742d4ea2bd1176e236172c8429aaf54486e7ac098db29ffe6529e0ce50973"
 
-[[package]]
-name = "unicode-xid"
-version = "0.2.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8ccb82d61f80a663efe1f787a51b16b5a51e3314d6ac365b08639f52387b33f3"
-
 [[package]]
 name = "url"
 version = "2.2.2"

frontend/rust-lib/flowy-database/migrations/2022-12-08-011428_grid_rev_snapshot/down.sql

@@ -0,0 +1,2 @@
+-- This file should undo anything in `up.sql`
+DROP TABLE grid_rev_snapshot;

frontend/rust-lib/flowy-database/migrations/2022-12-08-011428_grid_rev_snapshot/up.sql

@@ -0,0 +1,9 @@
+-- Your SQL goes here
+CREATE TABLE grid_rev_snapshot (
+      snapshot_id TEXT NOT NULL PRIMARY KEY DEFAULT '',
+      object_id TEXT NOT NULL DEFAULT '',
+      rev_id BIGINT NOT NULL DEFAULT 0,
+      base_rev_id BIGINT NOT NULL DEFAULT 0,
+      timestamp BIGINT NOT NULL DEFAULT 0,
+      data BLOB NOT NULL DEFAULT (x'')
+);

frontend/rust-lib/flowy-database/src/macros.rs

@@ -37,7 +37,7 @@ macro_rules! diesel_insert_table {
     ) => {
         {
         let _ = diesel::insert_into($table_name::table)
-                    .values($table.clone())
+                    .values($table)
                     // .on_conflict($table_name::dsl::id)
                     // .do_update()
                     // .set(WorkspaceTableChangeset::from_table(workspace_table))
@@ -61,6 +61,21 @@ macro_rules! diesel_record_count {
     };
 }
 
+#[macro_export]
+macro_rules! diesel_revision_record_count {
+    (
+        $table_name:expr,
+        $filter:expr,
+        $connection:expr
+    ) => {
+        $table_name
+            .filter($table_name::dsl::id.eq($id))
+            .count()
+            .get_result($connection)
+            .unwrap_or(0);
+    };
+}
+
 #[macro_export]
 macro_rules! diesel_update_table {
     (

frontend/rust-lib/flowy-database/src/schema.rs

@@ -1,4 +1,6 @@
-table! {
+// @generated automatically by Diesel CLI.
+
+diesel::table! {
     app_table (id) {
         id -> Text,
         workspace_id -> Text,
@@ -13,7 +15,7 @@ table! {
     }
 }
 
-table! {
+diesel::table! {
     document_rev_table (id) {
         id -> Integer,
         document_id -> Text,
@@ -24,14 +26,14 @@ table! {
     }
 }
 
-table! {
+diesel::table! {
     grid_block_index_table (row_id) {
         row_id -> Text,
         block_id -> Text,
     }
 }
 
-table! {
+diesel::table! {
     grid_meta_rev_table (id) {
         id -> Integer,
         object_id -> Text,
@@ -42,7 +44,18 @@ table! {
     }
 }
 
-table! {
+diesel::table! {
+    grid_rev_snapshot (snapshot_id) {
+        snapshot_id -> Text,
+        object_id -> Text,
+        rev_id -> BigInt,
+        base_rev_id -> BigInt,
+        timestamp -> BigInt,
+        data -> Binary,
+    }
+}
+
+diesel::table! {
     grid_rev_table (id) {
         id -> Integer,
         object_id -> Text,
@@ -53,7 +66,7 @@ table! {
     }
 }
 
-table! {
+diesel::table! {
     grid_view_rev_table (id) {
         id -> Integer,
         object_id -> Text,
@@ -64,14 +77,14 @@ table! {
     }
 }
 
-table! {
+diesel::table! {
     kv_table (key) {
         key -> Text,
         value -> Binary,
     }
 }
 
-table! {
+diesel::table! {
     rev_snapshot (id) {
         id -> Integer,
         object_id -> Text,
@@ -80,7 +93,7 @@ table! {
     }
 }
 
-table! {
+diesel::table! {
     rev_table (id) {
         id -> Integer,
         doc_id -> Text,
@@ -92,7 +105,7 @@ table! {
     }
 }
 
-table! {
+diesel::table! {
     trash_table (id) {
         id -> Text,
         name -> Text,
@@ -103,7 +116,7 @@ table! {
     }
 }
 
-table! {
+diesel::table! {
     user_table (id) {
         id -> Text,
         name -> Text,
@@ -114,7 +127,7 @@ table! {
     }
 }
 
-table! {
+diesel::table! {
     view_table (id) {
         id -> Text,
         belong_to_id -> Text,
@@ -130,7 +143,7 @@ table! {
     }
 }
 
-table! {
+diesel::table! {
     workspace_table (id) {
         id -> Text,
         name -> Text,
@@ -142,11 +155,12 @@ table! {
     }
 }
 
-allow_tables_to_appear_in_same_query!(
+diesel::allow_tables_to_appear_in_same_query!(
     app_table,
     document_rev_table,
     grid_block_index_table,
     grid_meta_rev_table,
+    grid_rev_snapshot,
     grid_rev_table,
     grid_view_rev_table,
     kv_table,

frontend/rust-lib/flowy-document/src/editor/document.rs

@@ -95,8 +95,8 @@ impl RevisionObjectSerializer for DocumentRevisionSerde {
     }
 }
 
-pub(crate) struct DocumentRevisionCompress();
-impl RevisionMergeable for DocumentRevisionCompress {
+pub(crate) struct DocumentRevisionMergeable();
+impl RevisionMergeable for DocumentRevisionMergeable {
     fn combine_revisions(&self, revisions: Vec<Revision>) -> FlowyResult<Bytes> {
         DocumentRevisionSerde::combine_revisions(revisions)
     }

frontend/rust-lib/flowy-document/src/editor/editor.rs

@@ -8,6 +8,7 @@ use flowy_database::ConnectionPool;
 use flowy_error::{internal_error, FlowyError, FlowyResult};
 use flowy_http_model::ws_data::ServerRevisionWSData;
 use flowy_revision::{RevisionCloudService, RevisionManager};
+use lib_infra::async_trait::async_trait;
 use lib_infra::future::FutureResult;
 use lib_ot::core::Transaction;
 use lib_ws::WSConnectState;
@@ -64,11 +65,15 @@ impl AppFlowyDocumentEditor {
     }
 
     pub async fn duplicate_document(&self) -> FlowyResult<String> {
-        let revisions = self.rev_manager.load_revisions().await?;
-        let transaction = make_transaction_from_revisions(&revisions)?;
+        let transaction = self.document_transaction().await?;
         let json = transaction.to_json()?;
         Ok(json)
     }
+
+    pub async fn document_transaction(&self) -> FlowyResult<Transaction> {
+        let revisions = self.rev_manager.load_revisions().await?;
+        make_transaction_from_revisions(&revisions)
+    }
 }
 
 fn spawn_edit_queue(
@@ -82,13 +87,12 @@ fn spawn_edit_queue(
     sender
 }
 
+#[async_trait]
 impl DocumentEditor for Arc<AppFlowyDocumentEditor> {
     #[tracing::instrument(name = "close document editor", level = "trace", skip_all)]
-    fn close(&self) {
-        let rev_manager = self.rev_manager.clone();
-        tokio::spawn(async move {
-            rev_manager.close().await;
-        });
+    async fn close(&self) {
+        self.rev_manager.generate_snapshot().await;
+        self.rev_manager.close().await;
     }
 
     fn export(&self) -> FutureResult<String, FlowyError> {

frontend/rust-lib/flowy-document/src/editor/queue.rs

@@ -3,7 +3,7 @@ use crate::DocumentUser;
 use async_stream::stream;
 use bytes::Bytes;
 use flowy_error::FlowyError;
-use flowy_http_model::revision::{RevId, Revision};
+use flowy_http_model::revision::RevId;
 use flowy_revision::RevisionManager;
 use futures::stream::StreamExt;
 use lib_ot::core::Transaction;
@@ -78,9 +78,7 @@ impl DocumentQueue {
     #[tracing::instrument(level = "trace", skip(self, transaction, md5), err)]
     async fn save_local_operations(&self, transaction: Transaction, md5: String) -> Result<RevId, FlowyError> {
         let bytes = Bytes::from(transaction.to_bytes()?);
-        let (base_rev_id, rev_id) = self.rev_manager.next_rev_id_pair();
-        let revision = Revision::new(&self.rev_manager.object_id, base_rev_id, rev_id, bytes, md5);
-        let _ = self.rev_manager.add_local_revision(&revision).await?;
+        let rev_id = self.rev_manager.add_local_revision(bytes, md5).await?;
         Ok(rev_id.into())
     }
 }

frontend/rust-lib/flowy-document/src/manager.rs

@@ -1,20 +1,20 @@
-use crate::editor::{initial_document_content, AppFlowyDocumentEditor, DocumentRevisionCompress};
+use crate::editor::{initial_document_content, AppFlowyDocumentEditor, DocumentRevisionMergeable};
 use crate::entities::{DocumentVersionPB, EditParams};
-use crate::old_editor::editor::{DeltaDocumentEditor, DeltaDocumentRevisionCompress};
+use crate::old_editor::editor::{DeltaDocumentEditor, DeltaDocumentRevisionMergeable};
 use crate::services::rev_sqlite::{SQLiteDeltaDocumentRevisionPersistence, SQLiteDocumentRevisionPersistence};
 use crate::services::DocumentPersistence;
 use crate::{errors::FlowyError, DocumentCloudService};
 use bytes::Bytes;
-
 use flowy_database::ConnectionPool;
 use flowy_error::FlowyResult;
 use flowy_http_model::util::md5;
 use flowy_http_model::{document::DocumentIdPB, revision::Revision, ws_data::ServerRevisionWSData};
 use flowy_revision::{
-    RevisionCloudService, RevisionManager, RevisionPersistence, RevisionPersistenceConfiguration, RevisionWebSocket,
-    SQLiteRevisionSnapshotPersistence,
+    PhantomSnapshotPersistence, RevisionCloudService, RevisionManager, RevisionPersistence,
+    RevisionPersistenceConfiguration, RevisionWebSocket,
 };
 use flowy_sync::client_document::initial_delta_document_content;
+use lib_infra::async_trait::async_trait;
 use lib_infra::future::FutureResult;
 use lib_infra::ref_map::{RefCountHashMap, RefCountValue};
 use lib_ws::WSConnectState;
@@ -32,9 +32,10 @@ pub trait DocumentDatabase: Send + Sync {
     fn db_pool(&self) -> Result<Arc<ConnectionPool>, FlowyError>;
 }
 
+#[async_trait]
 pub trait DocumentEditor: Send + Sync {
     /// Called when the document get closed
-    fn close(&self);
+    async fn close(&self);
 
     /// Exports the document content. The content is encoded in the corresponding
     /// editor data format.
@@ -129,7 +130,7 @@ impl DocumentManager {
     pub async fn close_document_editor<T: AsRef<str>>(&self, editor_id: T) -> Result<(), FlowyError> {
         let editor_id = editor_id.as_ref();
         tracing::Span::current().record("editor_id", &editor_id);
-        self.editor_map.write().await.remove(editor_id);
+        self.editor_map.write().await.remove(editor_id).await;
         Ok(())
     }
 
@@ -254,18 +255,15 @@ impl DocumentManager {
         pool: Arc<ConnectionPool>,
     ) -> Result<RevisionManager<Arc<ConnectionPool>>, FlowyError> {
         let user_id = self.user.user_id()?;
-        let disk_cache = SQLiteDocumentRevisionPersistence::new(&user_id, pool.clone());
+        let disk_cache = SQLiteDocumentRevisionPersistence::new(&user_id, pool);
         let configuration = RevisionPersistenceConfiguration::new(100, true);
         let rev_persistence = RevisionPersistence::new(&user_id, doc_id, disk_cache, configuration);
-        // let history_persistence = SQLiteRevisionHistoryPersistence::new(doc_id, pool.clone());
-        let snapshot_persistence = SQLiteRevisionSnapshotPersistence::new(doc_id, pool);
         Ok(RevisionManager::new(
             &user_id,
             doc_id,
             rev_persistence,
-            DocumentRevisionCompress(),
-            // history_persistence,
-            snapshot_persistence,
+            DocumentRevisionMergeable(),
+            PhantomSnapshotPersistence(),
         ))
     }
 
@@ -275,18 +273,15 @@ impl DocumentManager {
         pool: Arc<ConnectionPool>,
     ) -> Result<RevisionManager<Arc<ConnectionPool>>, FlowyError> {
         let user_id = self.user.user_id()?;
-        let disk_cache = SQLiteDeltaDocumentRevisionPersistence::new(&user_id, pool.clone());
+        let disk_cache = SQLiteDeltaDocumentRevisionPersistence::new(&user_id, pool);
         let configuration = RevisionPersistenceConfiguration::new(100, true);
         let rev_persistence = RevisionPersistence::new(&user_id, doc_id, disk_cache, configuration);
-        // let history_persistence = SQLiteRevisionHistoryPersistence::new(doc_id, pool.clone());
-        let snapshot_persistence = SQLiteRevisionSnapshotPersistence::new(doc_id, pool);
         Ok(RevisionManager::new(
             &user_id,
             doc_id,
             rev_persistence,
-            DeltaDocumentRevisionCompress(),
-            // history_persistence,
-            snapshot_persistence,
+            DeltaDocumentRevisionMergeable(),
+            PhantomSnapshotPersistence(),
         ))
     }
 }
@@ -320,9 +315,10 @@ impl RevisionCloudService for DocumentRevisionCloudService {
 #[derive(Clone)]
 struct RefCountDocumentHandler(Arc<dyn DocumentEditor>);
 
+#[async_trait]
 impl RefCountValue for RefCountDocumentHandler {
-    fn did_remove(&self) {
-        self.0.close();
+    async fn did_remove(&self) {
+        self.0.close().await;
     }
 }
 

frontend/rust-lib/flowy-document/src/old_editor/editor.rs

@@ -13,6 +13,7 @@ use flowy_revision::{
     RevisionWebSocket,
 };
 use flowy_sync::{errors::CollaborateResult, util::make_operations_from_revisions};
+use lib_infra::async_trait::async_trait;
 use lib_infra::future::FutureResult;
 use lib_ot::core::{AttributeEntry, AttributeHashMap};
 use lib_ot::{
@@ -145,8 +146,9 @@ impl DeltaDocumentEditor {
     }
 }
 
+#[async_trait]
 impl DocumentEditor for Arc<DeltaDocumentEditor> {
-    fn close(&self) {
+    async fn close(&self) {
         #[cfg(feature = "sync")]
         self.ws_manager.stop();
     }
@@ -267,8 +269,8 @@ impl RevisionObjectSerializer for DeltaDocumentRevisionSerde {
     }
 }
 
-pub(crate) struct DeltaDocumentRevisionCompress();
-impl RevisionMergeable for DeltaDocumentRevisionCompress {
+pub(crate) struct DeltaDocumentRevisionMergeable();
+impl RevisionMergeable for DeltaDocumentRevisionMergeable {
     fn combine_revisions(&self, revisions: Vec<Revision>) -> FlowyResult<Bytes> {
         DeltaDocumentRevisionSerde::combine_revisions(revisions)
     }

frontend/rust-lib/flowy-document/src/old_editor/queue.rs

@@ -3,7 +3,7 @@ use crate::DocumentUser;
 use async_stream::stream;
 use flowy_database::ConnectionPool;
 use flowy_error::FlowyError;
-use flowy_http_model::revision::{RevId, Revision};
+use flowy_http_model::revision::RevId;
 use flowy_revision::{RevisionMD5, RevisionManager, TransformOperations};
 use flowy_sync::{
     client_document::{history::UndoResult, ClientDocument},
@@ -178,9 +178,7 @@ impl EditDocumentQueue {
 
     async fn save_local_operations(&self, operations: DeltaTextOperations, md5: String) -> Result<RevId, FlowyError> {
         let bytes = operations.json_bytes();
-        let (base_rev_id, rev_id) = self.rev_manager.next_rev_id_pair();
-        let revision = Revision::new(&self.rev_manager.object_id, base_rev_id, rev_id, bytes, md5);
-        let _ = self.rev_manager.add_local_revision(&revision).await?;
+        let rev_id = self.rev_manager.add_local_revision(bytes, md5).await?;
         Ok(rev_id.into())
     }
 }

frontend/rust-lib/flowy-document/src/services/persistence/rev_sqlite/document_rev_sqlite_v0.rs

@@ -99,7 +99,6 @@ pub struct DeltaRevisionSql {}
 impl DeltaRevisionSql {
     fn create(revision_records: Vec<SyncRecord>, conn: &SqliteConnection) -> Result<(), FlowyError> {
         // Batch insert: https://diesel.rs/guides/all-about-inserts.html
-
         let records = revision_records
             .into_iter()
             .map(|record| {

frontend/rust-lib/flowy-folder/src/manager.rs

@@ -1,6 +1,6 @@
 use crate::entities::view::ViewDataFormatPB;
 use crate::entities::{ViewLayoutTypePB, ViewPB};
-use crate::services::folder_editor::FolderRevisionCompress;
+use crate::services::folder_editor::FolderRevisionMergeable;
 use crate::{
     dart_notification::{send_dart_notification, FolderNotification},
     entities::workspace::RepeatedWorkspacePB,
@@ -15,8 +15,8 @@ use bytes::Bytes;
 use flowy_document::editor::initial_read_me;
 use flowy_error::FlowyError;
 use flowy_revision::{
-    RevisionManager, RevisionPersistence, RevisionPersistenceConfiguration, RevisionWebSocket,
-    SQLiteRevisionSnapshotPersistence,
+    PhantomSnapshotPersistence, RevisionManager, RevisionPersistence, RevisionPersistenceConfiguration,
+    RevisionWebSocket,
 };
 use folder_rev_model::user_default;
 use lazy_static::lazy_static;
@@ -171,16 +171,13 @@ impl FolderManager {
         let disk_cache = SQLiteFolderRevisionPersistence::new(user_id, pool.clone());
         let configuration = RevisionPersistenceConfiguration::new(100, false);
         let rev_persistence = RevisionPersistence::new(user_id, object_id, disk_cache, configuration);
-        let rev_compactor = FolderRevisionCompress();
-        // let history_persistence = SQLiteRevisionHistoryPersistence::new(object_id, pool.clone());
-        let snapshot_persistence = SQLiteRevisionSnapshotPersistence::new(object_id, pool);
+        let rev_compactor = FolderRevisionMergeable();
         let rev_manager = RevisionManager::new(
             user_id,
             folder_id.as_ref(),
             rev_persistence,
             rev_compactor,
-            // history_persistence,
-            snapshot_persistence,
+            PhantomSnapshotPersistence(),
         );
 
         let folder_editor = FolderEditor::new(user_id, &folder_id, token, rev_manager, self.web_socket.clone()).await?;

frontend/rust-lib/flowy-folder/src/services/folder_editor.rs

@@ -82,10 +82,11 @@ impl FolderEditor {
 
     pub(crate) fn apply_change(&self, change: FolderChangeset) -> FlowyResult<()> {
         let FolderChangeset { operations: delta, md5 } = change;
-        let (base_rev_id, rev_id) = self.rev_manager.next_rev_id_pair();
         let delta_data = delta.json_bytes();
-        let revision = Revision::new(&self.rev_manager.object_id, base_rev_id, rev_id, delta_data, md5);
-        let _ = futures::executor::block_on(async { self.rev_manager.add_local_revision(&revision).await })?;
+        let rev_manager = self.rev_manager.clone();
+        tokio::spawn(async move {
+            let _ = rev_manager.add_local_revision(delta_data, md5).await;
+        });
         Ok(())
     }
 
@@ -113,8 +114,8 @@ impl RevisionObjectSerializer for FolderRevisionSerde {
     }
 }
 
-pub struct FolderRevisionCompress();
-impl RevisionMergeable for FolderRevisionCompress {
+pub struct FolderRevisionMergeable();
+impl RevisionMergeable for FolderRevisionMergeable {
     fn combine_revisions(&self, revisions: Vec<Revision>) -> FlowyResult<Bytes> {
         FolderRevisionSerde::combine_revisions(revisions)
     }

frontend/rust-lib/flowy-folder/src/services/persistence/version_1/app_sql.rs

@@ -15,7 +15,7 @@ impl AppTableSql {
     pub(crate) fn create_app(app_rev: AppRevision, conn: &SqliteConnection) -> Result<(), FlowyError> {
         let app_table = AppTable::new(app_rev);
         match diesel_record_count!(app_table, &app_table.id, conn) {
-            0 => diesel_insert_table!(app_table, &app_table, conn),
+            0 => diesel_insert_table!(app_table, app_table.clone(), conn),
             _ => {
                 let changeset = AppChangeset::from_table(app_table);
                 diesel_update_table!(app_table, changeset, conn)

frontend/rust-lib/flowy-folder/src/services/persistence/version_1/trash_sql.rs

@@ -13,7 +13,7 @@ impl TrashTableSql {
         for trash_rev in trashes {
             let trash_table: TrashTable = trash_rev.into();
             match diesel_record_count!(trash_table, &trash_table.id, conn) {
-                0 => diesel_insert_table!(trash_table, &trash_table, conn),
+                0 => diesel_insert_table!(trash_table, trash_table.clone(), conn),
                 _ => {
                     let changeset = TrashChangeset::from(trash_table);
                     diesel_update_table!(trash_table, changeset, conn)

frontend/rust-lib/flowy-folder/src/services/persistence/version_1/view_sql.rs

@@ -21,7 +21,7 @@ impl ViewTableSql {
     pub(crate) fn create_view(view_rev: ViewRevision, conn: &SqliteConnection) -> Result<(), FlowyError> {
         let view_table = ViewTable::new(view_rev);
         match diesel_record_count!(view_table, &view_table.id, conn) {
-            0 => diesel_insert_table!(view_table, &view_table, conn),
+            0 => diesel_insert_table!(view_table, view_table.clone(), conn),
             _ => {
                 let changeset = ViewChangeset::from_table(view_table);
                 diesel_update_table!(view_table, changeset, conn)

frontend/rust-lib/flowy-folder/src/services/persistence/version_1/workspace_sql.rs

@@ -15,7 +15,7 @@ impl WorkspaceTableSql {
     ) -> Result<(), FlowyError> {
         let table = WorkspaceTable::new(workspace_rev, user_id);
         match diesel_record_count!(workspace_table, &table.id, conn) {
-            0 => diesel_insert_table!(workspace_table, &table, conn),
+            0 => diesel_insert_table!(workspace_table, table.clone(), conn),
             _ => {
                 let changeset = WorkspaceChangeset::from_table(table);
                 diesel_update_table!(workspace_table, changeset, conn);

frontend/rust-lib/flowy-grid/src/event_handler.rs

@@ -208,7 +208,7 @@ pub(crate) async fn create_field_type_option_data_handler(
     let params: CreateFieldParams = data.into_inner().try_into()?;
     let editor = manager.get_grid_editor(&params.grid_id).await?;
     let field_rev = editor
-        .create_new_field_rev(&params.field_type, params.type_option_data)
+        .create_new_field_rev_with_type_option(&params.field_type, params.type_option_data)
         .await?;
     let field_type: FieldType = field_rev.ty.into();
     let type_option_data = get_type_option_data(&field_rev, &field_type).await?;

frontend/rust-lib/flowy-grid/src/manager.rs

@@ -1,23 +1,19 @@
 use crate::entities::GridLayout;
-
-use crate::services::grid_editor::{GridRevisionCompress, GridRevisionEditor};
+use crate::services::grid_editor::{GridRevisionEditor, GridRevisionMergeable};
 use crate::services::persistence::block_index::BlockIndexCache;
 use crate::services::persistence::kv::GridKVPersistence;
 use crate::services::persistence::migration::GridMigration;
-use crate::services::persistence::rev_sqlite::SQLiteGridRevisionPersistence;
+use crate::services::persistence::rev_sqlite::{SQLiteGridRevisionPersistence, SQLiteGridRevisionSnapshotPersistence};
 use crate::services::persistence::GridDatabase;
 use crate::services::view_editor::make_grid_view_rev_manager;
 use bytes::Bytes;
-
 use flowy_database::ConnectionPool;
 use flowy_error::{FlowyError, FlowyResult};
 use flowy_http_model::revision::Revision;
-use flowy_revision::{
-    RevisionManager, RevisionPersistence, RevisionPersistenceConfiguration, RevisionWebSocket,
-    SQLiteRevisionSnapshotPersistence,
-};
+use flowy_revision::{RevisionManager, RevisionPersistence, RevisionPersistenceConfiguration, RevisionWebSocket};
 use flowy_sync::client_grid::{make_grid_block_operations, make_grid_operations, make_grid_view_operations};
 use grid_rev_model::{BuildGridContext, GridRevision, GridViewRevision};
+use lib_infra::async_trait::async_trait;
 use lib_infra::ref_map::{RefCountHashMap, RefCountValue};
 
 use crate::services::block_manager::make_grid_block_rev_manager;
@@ -108,7 +104,7 @@ impl GridManager {
         let grid_id = grid_id.as_ref();
         tracing::Span::current().record("grid_id", &grid_id);
 
-        self.grid_editors.write().await.remove(grid_id);
+        self.grid_editors.write().await.remove(grid_id).await;
         // self.task_scheduler.write().await.unregister_handler(grid_id);
         Ok(())
     }
@@ -152,18 +148,25 @@ impl GridManager {
         Ok(grid_editor)
     }
 
+    #[tracing::instrument(level = "trace", skip(self, pool), err)]
     pub fn make_grid_rev_manager(
         &self,
         grid_id: &str,
         pool: Arc<ConnectionPool>,
     ) -> FlowyResult<RevisionManager<Arc<ConnectionPool>>> {
         let user_id = self.grid_user.user_id()?;
+
+        // Create revision persistence
         let disk_cache = SQLiteGridRevisionPersistence::new(&user_id, pool.clone());
-        let configuration = RevisionPersistenceConfiguration::new(2, false);
+        let configuration = RevisionPersistenceConfiguration::new(4, false);
         let rev_persistence = RevisionPersistence::new(&user_id, grid_id, disk_cache, configuration);
-        let snapshot_persistence = SQLiteRevisionSnapshotPersistence::new(grid_id, pool);
-        let rev_compactor = GridRevisionCompress();
-        let rev_manager = RevisionManager::new(&user_id, grid_id, rev_persistence, rev_compactor, snapshot_persistence);
+
+        // Create snapshot persistence
+        let snapshot_object_id = format!("grid:{}", grid_id);
+        let snapshot_persistence = SQLiteGridRevisionSnapshotPersistence::new(&snapshot_object_id, pool);
+
+        let rev_compress = GridRevisionMergeable();
+        let rev_manager = RevisionManager::new(&user_id, grid_id, rev_persistence, rev_compress, snapshot_persistence);
         Ok(rev_manager)
     }
 }
@@ -220,8 +223,9 @@ pub async fn make_grid_view_data(
     Ok(grid_rev_delta_bytes)
 }
 
+#[async_trait]
 impl RefCountValue for GridRevisionEditor {
-    fn did_remove(&self) {
-        self.close();
+    async fn did_remove(&self) {
+        self.close().await;
     }
 }

frontend/rust-lib/flowy-grid/src/services/block_editor.rs

@@ -47,6 +47,11 @@ impl GridBlockRevisionEditor {
         })
     }
 
+    pub async fn close(&self) {
+        self.rev_manager.generate_snapshot().await;
+        self.rev_manager.close().await;
+    }
+
     pub async fn duplicate_block(&self, duplicated_block_id: &str) -> GridBlockRevision {
         self.pad.read().await.duplicate_data(duplicated_block_id).await
     }
@@ -167,10 +172,8 @@ impl GridBlockRevisionEditor {
 
     async fn apply_change(&self, change: GridBlockRevisionChangeset) -> FlowyResult<()> {
         let GridBlockRevisionChangeset { operations: delta, md5 } = change;
-        let (base_rev_id, rev_id) = self.rev_manager.next_rev_id_pair();
-        let delta_data = delta.json_bytes();
-        let revision = Revision::new(&self.rev_manager.object_id, base_rev_id, rev_id, delta_data, md5);
-        let _ = self.rev_manager.add_local_revision(&revision).await?;
+        let data = delta.json_bytes();
+        let _ = self.rev_manager.add_local_revision(data, md5).await?;
         Ok(())
     }
 }
@@ -203,8 +206,8 @@ impl RevisionObjectSerializer for GridBlockRevisionSerde {
     }
 }
 
-pub struct GridBlockRevisionCompress();
-impl RevisionMergeable for GridBlockRevisionCompress {
+pub struct GridBlockRevisionMergeable();
+impl RevisionMergeable for GridBlockRevisionMergeable {
     fn combine_revisions(&self, revisions: Vec<Revision>) -> FlowyResult<Bytes> {
         GridBlockRevisionSerde::combine_revisions(revisions)
     }

frontend/rust-lib/flowy-grid/src/services/block_manager.rs

@@ -1,16 +1,16 @@
 use crate::dart_notification::{send_dart_notification, GridDartNotification};
 use crate::entities::{CellChangesetPB, GridBlockChangesetPB, InsertedRowPB, RowPB, UpdatedRowPB};
 use crate::manager::GridUser;
-use crate::services::block_editor::{GridBlockRevisionCompress, GridBlockRevisionEditor};
+use crate::services::block_editor::{GridBlockRevisionEditor, GridBlockRevisionMergeable};
 use crate::services::persistence::block_index::BlockIndexCache;
-use crate::services::persistence::rev_sqlite::SQLiteGridBlockRevisionPersistence;
+use crate::services::persistence::rev_sqlite::{
+    SQLiteGridBlockRevisionPersistence, SQLiteGridRevisionSnapshotPersistence,
+};
 use crate::services::row::{block_from_row_orders, make_row_from_row_rev, GridBlock};
 use dashmap::DashMap;
 use flowy_database::ConnectionPool;
 use flowy_error::FlowyResult;
-use flowy_revision::{
-    RevisionManager, RevisionPersistence, RevisionPersistenceConfiguration, SQLiteRevisionSnapshotPersistence,
-};
+use flowy_revision::{RevisionManager, RevisionPersistence, RevisionPersistenceConfiguration};
 use grid_rev_model::{GridBlockMetaRevision, GridBlockMetaRevisionChangeset, RowChangeset, RowRevision};
 use std::borrow::Cow;
 use std::collections::HashMap;
@@ -39,6 +39,12 @@ impl GridBlockManager {
         Ok(manager)
     }
 
+    pub async fn close(&self) {
+        for block_editor in self.block_editors.iter() {
+            block_editor.close().await;
+        }
+    }
+
     // #[tracing::instrument(level = "trace", skip(self))]
     pub(crate) async fn get_block_editor(&self, block_id: &str) -> FlowyResult<Arc<GridBlockRevisionEditor>> {
         debug_assert!(!block_id.is_empty());
@@ -275,12 +281,18 @@ pub fn make_grid_block_rev_manager(
     block_id: &str,
 ) -> FlowyResult<RevisionManager<Arc<ConnectionPool>>> {
     let user_id = user.user_id()?;
+
+    // Create revision persistence
     let pool = user.db_pool()?;
     let disk_cache = SQLiteGridBlockRevisionPersistence::new(&user_id, pool.clone());
     let configuration = RevisionPersistenceConfiguration::new(4, false);
     let rev_persistence = RevisionPersistence::new(&user_id, block_id, disk_cache, configuration);
-    let rev_compactor = GridBlockRevisionCompress();
-    let snapshot_persistence = SQLiteRevisionSnapshotPersistence::new(block_id, pool);
-    let rev_manager = RevisionManager::new(&user_id, block_id, rev_persistence, rev_compactor, snapshot_persistence);
+
+    // Create snapshot persistence
+    let snapshot_object_id = format!("grid_block:{}", block_id);
+    let snapshot_persistence = SQLiteGridRevisionSnapshotPersistence::new(&snapshot_object_id, pool);
+
+    let rev_compress = GridBlockRevisionMergeable();
+    let rev_manager = RevisionManager::new(&user_id, block_id, rev_persistence, rev_compress, snapshot_persistence);
     Ok(rev_manager)
 }

frontend/rust-lib/flowy-grid/src/services/field/type_options/selection_type_option/checklist_type_option.rs

@@ -61,11 +61,8 @@ impl CellDataOperation<SelectOptionIds, SelectOptionCellChangeset> for Checklist
             .filter(|insert_option_id| self.options.iter().any(|option| &option.id == insert_option_id))
             .collect::<Vec<String>>();
 
-        let new_cell_data: String;
         match cell_rev {
-            None => {
-                new_cell_data = SelectOptionIds::from(insert_option_ids).to_string();
-            }
+            None => Ok(SelectOptionIds::from(insert_option_ids).to_string()),
             Some(cell_rev) => {
                 let cell_data = get_cell_data(&cell_rev);
                 let mut select_ids: SelectOptionIds = cell_data.into();
@@ -79,12 +76,9 @@ impl CellDataOperation<SelectOptionIds, SelectOptionCellChangeset> for Checklist
                     select_ids.retain(|id| id != &delete_option_id);
                 }
 
-                new_cell_data = select_ids.to_string();
+                Ok(select_ids.to_string())
             }
         }
-
-        tracing::trace!("checklist's cell data: {}", &new_cell_data);
-        Ok(new_cell_data)
     }
 }
 

frontend/rust-lib/flowy-grid/src/services/filter/controller.rs

@@ -60,7 +60,11 @@ impl FilterController {
     }
 
     pub async fn close(&self) {
-        self.task_scheduler.write().await.unregister_handler(&self.handler_id);
+        self.task_scheduler
+            .write()
+            .await
+            .unregister_handler(&self.handler_id)
+            .await;
     }
 
     #[tracing::instrument(name = "schedule_filter_task", level = "trace", skip(self))]

frontend/rust-lib/flowy-grid/src/services/grid_editor.rs

@@ -26,7 +26,7 @@ use flowy_sync::errors::{CollaborateError, CollaborateResult};
 use flowy_sync::util::make_operations_from_revisions;
 use flowy_task::TaskDispatcher;
 use grid_rev_model::*;
-use lib_infra::future::{to_future, FutureResult};
+use lib_infra::future::{to_fut, FutureResult};
 use lib_ot::core::EmptyAttributes;
 use std::collections::HashMap;
 use std::sync::Arc;
@@ -87,14 +87,11 @@ impl GridRevisionEditor {
     }
 
     #[tracing::instrument(name = "close grid editor", level = "trace", skip_all)]
-    pub fn close(&self) {
-        let rev_manager = self.rev_manager.clone();
-        let view_manager = self.view_manager.clone();
-        let view_id = self.grid_id.clone();
-        tokio::spawn(async move {
-            rev_manager.close().await;
-            view_manager.close(&view_id).await;
-        });
+    pub async fn close(&self) {
+        self.block_manager.close().await;
+        self.rev_manager.generate_snapshot().await;
+        self.rev_manager.close().await;
+        self.view_manager.close(&self.grid_id).await;
     }
 
     /// Save the type-option data to disk and send a `GridDartNotification::DidUpdateField` notification
@@ -154,7 +151,15 @@ impl GridRevisionEditor {
         Ok(field_rev)
     }
 
-    pub async fn create_new_field_rev(
+    pub async fn create_new_field_rev(&self, field_rev: FieldRevision) -> FlowyResult<()> {
+        let field_id = field_rev.id.clone();
+        let _ = self.modify(|grid| Ok(grid.create_field_rev(field_rev, None)?)).await?;
+        let _ = self.notify_did_insert_grid_field(&field_id).await?;
+
+        Ok(())
+    }
+
+    pub async fn create_new_field_rev_with_type_option(
         &self,
         field_type: &FieldType,
         type_option_data: Option<Vec<u8>>,
@@ -627,7 +632,7 @@ impl GridRevisionEditor {
                 let block_manager = self.block_manager.clone();
                 self.view_manager
                     .move_group_row(row_rev, to_group_id, to_row_id.clone(), |row_changeset| {
-                        to_future(async move {
+                        to_fut(async move {
                             tracing::trace!("Row data changed: {:?}", row_changeset);
                             let cell_changesets = row_changeset
                                 .cell_by_field_id
@@ -752,10 +757,8 @@ impl GridRevisionEditor {
 
     async fn apply_change(&self, change: GridRevisionChangeset) -> FlowyResult<()> {
         let GridRevisionChangeset { operations: delta, md5 } = change;
-        let (base_rev_id, rev_id) = self.rev_manager.next_rev_id_pair();
-        let delta_data = delta.json_bytes();
-        let revision = Revision::new(&self.rev_manager.object_id, base_rev_id, rev_id, delta_data, md5);
-        let _ = self.rev_manager.add_local_revision(&revision).await?;
+        let data = delta.json_bytes();
+        let _ = self.rev_manager.add_local_revision(data, md5).await?;
         Ok(())
     }
 
@@ -810,6 +813,10 @@ impl GridRevisionEditor {
     pub fn rev_manager(&self) -> Arc<RevisionManager<Arc<ConnectionPool>>> {
         self.rev_manager.clone()
     }
+
+    pub fn grid_pad(&self) -> Arc<RwLock<GridRevisionPad>> {
+        self.grid_pad.clone()
+    }
 }
 
 pub struct GridRevisionSerde();
@@ -839,9 +846,9 @@ impl RevisionCloudService for GridRevisionCloudService {
     }
 }
 
-pub struct GridRevisionCompress();
+pub struct GridRevisionMergeable();
 
-impl RevisionMergeable for GridRevisionCompress {
+impl RevisionMergeable for GridRevisionMergeable {
     fn combine_revisions(&self, revisions: Vec<Revision>) -> FlowyResult<Bytes> {
         GridRevisionSerde::combine_revisions(revisions)
     }

frontend/rust-lib/flowy-grid/src/services/grid_editor_trait_impl.rs

@@ -4,7 +4,7 @@ use crate::services::view_editor::GridViewEditorDelegate;
 use flowy_sync::client_grid::GridRevisionPad;
 use flowy_task::TaskDispatcher;
 use grid_rev_model::{FieldRevision, RowRevision};
-use lib_infra::future::{to_future, Fut};
+use lib_infra::future::{to_fut, Fut};
 use std::sync::Arc;
 use tokio::sync::RwLock;
 
@@ -17,7 +17,7 @@ pub(crate) struct GridViewEditorDelegateImpl {
 impl GridViewEditorDelegate for GridViewEditorDelegateImpl {
     fn get_field_revs(&self, field_ids: Option<Vec<String>>) -> Fut<Vec<Arc<FieldRevision>>> {
         let pad = self.pad.clone();
-        to_future(async move {
+        to_fut(async move {
             match pad.read().await.get_field_revs(field_ids) {
                 Ok(field_revs) => field_revs,
                 Err(e) => {
@@ -31,19 +31,19 @@ impl GridViewEditorDelegate for GridViewEditorDelegateImpl {
     fn get_field_rev(&self, field_id: &str) -> Fut<Option<Arc<FieldRevision>>> {
         let pad = self.pad.clone();
         let field_id = field_id.to_owned();
-        to_future(async move { Some(pad.read().await.get_field_rev(&field_id)?.1.clone()) })
+        to_fut(async move { Some(pad.read().await.get_field_rev(&field_id)?.1.clone()) })
     }
 
     fn index_of_row(&self, row_id: &str) -> Fut<Option<usize>> {
         let block_manager = self.block_manager.clone();
         let row_id = row_id.to_owned();
-        to_future(async move { block_manager.index_of_row(&row_id).await })
+        to_fut(async move { block_manager.index_of_row(&row_id).await })
     }
 
     fn get_row_rev(&self, row_id: &str) -> Fut<Option<(usize, Arc<RowRevision>)>> {
         let block_manager = self.block_manager.clone();
         let row_id = row_id.to_owned();
-        to_future(async move {
+        to_fut(async move {
             match block_manager.get_row_rev(&row_id).await {
                 Ok(indexed_row) => indexed_row,
                 Err(_) => None,
@@ -54,7 +54,7 @@ impl GridViewEditorDelegate for GridViewEditorDelegateImpl {
     fn get_row_revs(&self) -> Fut<Vec<Arc<RowRevision>>> {
         let block_manager = self.block_manager.clone();
 
-        to_future(async move {
+        to_fut(async move {
             let blocks = block_manager.get_blocks(None).await.unwrap();
             blocks
                 .into_iter()
@@ -65,7 +65,7 @@ impl GridViewEditorDelegate for GridViewEditorDelegateImpl {
 
     fn get_blocks(&self) -> Fut<Vec<GridBlock>> {
         let block_manager = self.block_manager.clone();
-        to_future(async move { block_manager.get_blocks(None).await.unwrap_or_default() })
+        to_fut(async move { block_manager.get_blocks(None).await.unwrap_or_default() })
     }
 
     fn get_task_scheduler(&self) -> Arc<RwLock<TaskDispatcher>> {

frontend/rust-lib/flowy-grid/src/services/persistence/rev_sqlite/grid_snapshot_sqlite_impl.rs

@@ -0,0 +1,148 @@
+use bytes::Bytes;
+use flowy_database::{
+    prelude::*,
+    schema::{grid_rev_snapshot, grid_rev_snapshot::dsl},
+    ConnectionPool,
+};
+use flowy_error::{internal_error, FlowyResult};
+use flowy_revision::{RevisionSnapshot, RevisionSnapshotDiskCache};
+use lib_infra::util::timestamp;
+use std::sync::Arc;
+
+pub struct SQLiteGridRevisionSnapshotPersistence {
+    object_id: String,
+    pool: Arc<ConnectionPool>,
+}
+
+impl SQLiteGridRevisionSnapshotPersistence {
+    pub fn new(object_id: &str, pool: Arc<ConnectionPool>) -> Self {
+        Self {
+            object_id: object_id.to_string(),
+            pool,
+        }
+    }
+
+    fn gen_snapshot_id(&self, rev_id: i64) -> String {
+        format!("{}:{}", self.object_id, rev_id)
+    }
+}
+
+impl RevisionSnapshotDiskCache for SQLiteGridRevisionSnapshotPersistence {
+    fn write_snapshot(&self, rev_id: i64, data: Vec<u8>) -> FlowyResult<()> {
+        let conn = self.pool.get().map_err(internal_error)?;
+        let snapshot_id = self.gen_snapshot_id(rev_id);
+        let timestamp = timestamp();
+        let record = (
+            dsl::snapshot_id.eq(&snapshot_id),
+            dsl::object_id.eq(&self.object_id),
+            dsl::rev_id.eq(rev_id),
+            dsl::base_rev_id.eq(rev_id),
+            dsl::timestamp.eq(timestamp),
+            dsl::data.eq(data),
+        );
+        let _ = insert_or_ignore_into(dsl::grid_rev_snapshot)
+            .values(record)
+            .execute(&*conn)?;
+        Ok(())
+
+        // conn.immediate_transaction::<_, FlowyError, _>(|| {
+        //     let filter = dsl::grid_rev_snapshot
+        //         .filter(dsl::object_id.eq(&self.object_id))
+        //         .filter(dsl::rev_id.eq(rev_id));
+        //
+        //     let is_exist: bool = select(exists(filter)).get_result(&*conn)?;
+        //     match is_exist {
+        //         false => {
+        //             let record = (
+        //                 dsl::object_id.eq(&self.object_id),
+        //                 dsl::rev_id.eq(rev_id),
+        //                 dsl::data.eq(data),
+        //             );
+        //             insert_or_ignore_into(dsl::grid_rev_snapshot)
+        //                 .values(record)
+        //                 .execute(&*conn)?;
+        //         }
+        //         true => {
+        //             let affected_row = update(filter).set(dsl::data.eq(data)).execute(&*conn)?;
+        //             debug_assert_eq!(affected_row, 1);
+        //         }
+        //     }
+        //     Ok(())
+        // })
+    }
+
+    fn read_snapshot(&self, rev_id: i64) -> FlowyResult<Option<RevisionSnapshot>> {
+        let conn = self.pool.get().map_err(internal_error)?;
+        let snapshot_id = self.gen_snapshot_id(rev_id);
+        let record = dsl::grid_rev_snapshot
+            .filter(dsl::snapshot_id.eq(&snapshot_id))
+            .first::<GridSnapshotRecord>(&*conn)?;
+
+        Ok(Some(record.into()))
+    }
+
+    fn read_last_snapshot(&self) -> FlowyResult<Option<RevisionSnapshot>> {
+        let conn = self.pool.get().map_err(internal_error)?;
+        let latest_record = dsl::grid_rev_snapshot
+            .filter(dsl::object_id.eq(&self.object_id))
+            .order(dsl::rev_id.desc())
+            // .select(max(dsl::rev_id))
+            // .select((dsl::id, dsl::object_id, dsl::rev_id, dsl::data))
+            .first::<GridSnapshotRecord>(&*conn)?;
+        Ok(Some(latest_record.into()))
+    }
+}
+#[derive(PartialEq, Clone, Debug, Queryable, Identifiable, Insertable, Associations)]
+#[table_name = "grid_rev_snapshot"]
+#[primary_key("snapshot_id")]
+struct GridSnapshotRecord {
+    snapshot_id: String,
+    object_id: String,
+    rev_id: i64,
+    base_rev_id: i64,
+    timestamp: i64,
+    data: Vec<u8>,
+}
+
+impl std::convert::From<GridSnapshotRecord> for RevisionSnapshot {
+    fn from(record: GridSnapshotRecord) -> Self {
+        RevisionSnapshot {
+            rev_id: record.rev_id,
+            base_rev_id: record.base_rev_id,
+            timestamp: record.timestamp,
+            data: Bytes::from(record.data),
+        }
+    }
+}
+
+// pub(crate) fn get_latest_rev_id_from(rev_ids: Vec<i64>, anchor: i64) -> Option<i64> {
+//     let mut target_rev_id = None;
+//     let mut old_step: Option<i64> = None;
+//     for rev_id in rev_ids {
+//         let step = (rev_id - anchor).abs();
+//         if let Some(old_step) = &mut old_step {
+//             if *old_step > step {
+//                 *old_step = step;
+//                 target_rev_id = Some(rev_id);
+//             }
+//         } else {
+//             old_step = Some(step);
+//             target_rev_id = Some(rev_id);
+//         }
+//     }
+//     target_rev_id
+// }
+
+// #[cfg(test)]
+// mod tests {
+//     use crate::services::persistence::rev_sqlite::get_latest_rev_id_from;
+//
+//     #[test]
+//     fn test_latest_rev_id() {
+//         let ids = vec![1, 2, 3, 4, 5, 6];
+//         for (anchor, expected_value) in vec![(3, 3), (7, 6), (1, 1)] {
+//             let value = get_latest_rev_id_from(ids.clone(), anchor).unwrap();
+//             assert_eq!(value, expected_value);
+//         }
+//     }
+// }

frontend/rust-lib/flowy-grid/src/services/persistence/rev_sqlite/mod.rs

@@ -1,7 +1,9 @@
-mod grid_block_impl;
-mod grid_impl;
-mod grid_view_impl;
+mod grid_block_sqlite_impl;
+mod grid_snapshot_sqlite_impl;
+mod grid_sqlite_impl;
+mod grid_view_sqlite_impl;
 
-pub use grid_block_impl::*;
-pub use grid_impl::*;
-pub use grid_view_impl::*;
+pub use grid_block_sqlite_impl::*;
+pub use grid_snapshot_sqlite_impl::*;
+pub use grid_sqlite_impl::*;
+pub use grid_view_sqlite_impl::*;

frontend/rust-lib/flowy-grid/src/services/view_editor/editor.rs

@@ -11,10 +11,14 @@ use crate::services::view_editor::trait_impl::*;
 use crate::services::view_editor::GridViewChangedReceiverRunner;
 use flowy_database::ConnectionPool;
 use flowy_error::FlowyResult;
+use flowy_http_model::revision::Revision;
 use flowy_revision::RevisionManager;
-use flowy_sync::client_grid::{GridViewRevisionChangeset, GridViewRevisionPad};
+use flowy_sync::client_grid::{make_grid_view_operations, GridViewRevisionChangeset, GridViewRevisionPad};
 use flowy_task::TaskDispatcher;
-use grid_rev_model::{gen_grid_filter_id, FieldRevision, FieldTypeRevision, FilterRevision, RowChangeset, RowRevision};
+use grid_rev_model::{
+    gen_grid_filter_id, FieldRevision, FieldTypeRevision, FilterRevision, LayoutRevision, RowChangeset, RowRevision,
+};
+use lib_infra::async_trait::async_trait;
 use lib_infra::future::Fut;
 use lib_infra::ref_map::RefCountValue;
 use nanoid::nanoid;
@@ -60,13 +64,26 @@ impl GridViewRevisionEditor {
         let cloud = Arc::new(GridViewRevisionCloudService {
             token: token.to_owned(),
         });
-        let view_revision_pad = rev_manager.initialize::<GridViewRevisionSerde>(Some(cloud)).await?;
-        let pad = Arc::new(RwLock::new(view_revision_pad));
+
+        let view_rev_pad = match rev_manager.initialize::<GridViewRevisionSerde>(Some(cloud)).await {
+            Ok(pad) => pad,
+            Err(err) => {
+                // It shouldn't be here, because the snapshot should come to recue.
+                tracing::error!("Deserialize grid view revisions failed: {}", err);
+                let view = GridViewRevisionPad::new(view_id.to_owned(), view_id.to_owned(), LayoutRevision::Table);
+                let bytes = make_grid_view_operations(&view).json_bytes();
+                let reset_revision = Revision::initial_revision(&view_id, bytes);
+                let _ = rev_manager.reset_object(vec![reset_revision]).await;
+                view
+            }
+        };
+
+        let view_rev_pad = Arc::new(RwLock::new(view_rev_pad));
         let rev_manager = Arc::new(rev_manager);
         let group_controller = new_group_controller(
             user_id.to_owned(),
             view_id.clone(),
-            pad.clone(),
+            view_rev_pad.clone(),
             rev_manager.clone(),
             delegate.clone(),
         )
@@ -74,9 +91,10 @@ impl GridViewRevisionEditor {
 
         let user_id = user_id.to_owned();
         let group_controller = Arc::new(RwLock::new(group_controller));
-        let filter_controller = make_filter_controller(&view_id, delegate.clone(), notifier.clone(), pad.clone()).await;
+        let filter_controller =
+            make_filter_controller(&view_id, delegate.clone(), notifier.clone(), view_rev_pad.clone()).await;
         Ok(Self {
-            pad,
+            pad: view_rev_pad,
             user_id,
             view_id,
             rev_manager,
@@ -88,11 +106,10 @@ impl GridViewRevisionEditor {
     }
 
     #[tracing::instrument(name = "close grid view editor", level = "trace", skip_all)]
-    pub fn close(&self) {
-        let filter_controller = self.filter_controller.clone();
-        tokio::spawn(async move {
-            filter_controller.read().await.close().await;
-        });
+    pub async fn close(&self) {
+        self.rev_manager.generate_snapshot().await;
+        self.rev_manager.close().await;
+        self.filter_controller.read().await.close().await;
     }
 
     pub async fn filter_rows(&self, _block_id: &str, mut rows: Vec<Arc<RowRevision>>) -> Vec<Arc<RowRevision>> {
@@ -510,9 +527,10 @@ impl GridViewRevisionEditor {
     }
 }
 
+#[async_trait]
 impl RefCountValue for GridViewRevisionEditor {
-    fn did_remove(&self) {
-        self.close();
+    async fn did_remove(&self) {
+        self.close().await;
     }
 }
 

frontend/rust-lib/flowy-grid/src/services/view_editor/editor_manager.rs

@@ -4,15 +4,15 @@ use crate::entities::{
 };
 use crate::manager::GridUser;
 use crate::services::filter::FilterType;
-use crate::services::persistence::rev_sqlite::SQLiteGridViewRevisionPersistence;
+use crate::services::persistence::rev_sqlite::{
+    SQLiteGridRevisionSnapshotPersistence, SQLiteGridViewRevisionPersistence,
+};
 use crate::services::view_editor::changed_notifier::*;
-use crate::services::view_editor::trait_impl::GridViewRevisionCompress;
+use crate::services::view_editor::trait_impl::GridViewRevisionMergeable;
 use crate::services::view_editor::{GridViewEditorDelegate, GridViewRevisionEditor};
 use flowy_database::ConnectionPool;
 use flowy_error::FlowyResult;
-use flowy_revision::{
-    RevisionManager, RevisionPersistence, RevisionPersistenceConfiguration, SQLiteRevisionSnapshotPersistence,
-};
+use flowy_revision::{RevisionManager, RevisionPersistence, RevisionPersistenceConfiguration};
 use grid_rev_model::{FieldRevision, FilterRevision, RowChangeset, RowRevision};
 use lib_infra::future::Fut;
 use lib_infra::ref_map::RefCountHashMap;
@@ -42,7 +42,7 @@ impl GridViewManager {
     }
 
     pub async fn close(&self, view_id: &str) {
-        self.view_editors.write().await.remove(view_id);
+        self.view_editors.write().await.remove(view_id).await;
     }
 
     pub async fn subscribe_view_changed(&self, view_id: &str) -> FlowyResult<broadcast::Receiver<GridViewChanged>> {
@@ -230,19 +230,23 @@ pub async fn make_grid_view_rev_manager(
     view_id: &str,
 ) -> FlowyResult<RevisionManager<Arc<ConnectionPool>>> {
     let user_id = user.user_id()?;
-    let pool = user.db_pool()?;
 
+    // Create revision persistence
+    let pool = user.db_pool()?;
     let disk_cache = SQLiteGridViewRevisionPersistence::new(&user_id, pool.clone());
     let configuration = RevisionPersistenceConfiguration::new(2, false);
     let rev_persistence = RevisionPersistence::new(&user_id, view_id, disk_cache, configuration);
-    let rev_compactor = GridViewRevisionCompress();
 
-    let snapshot_persistence = SQLiteRevisionSnapshotPersistence::new(view_id, pool);
+    // Create snapshot persistence
+    let snapshot_object_id = format!("grid_view:{}", view_id);
+    let snapshot_persistence = SQLiteGridRevisionSnapshotPersistence::new(&snapshot_object_id, pool);
+
+    let rev_compress = GridViewRevisionMergeable();
     Ok(RevisionManager::new(
         &user_id,
         view_id,
         rev_persistence,
-        rev_compactor,
+        rev_compress,
         snapshot_persistence,
     ))
 }

frontend/rust-lib/flowy-grid/src/services/view_editor/trait_impl.rs

@@ -13,7 +13,7 @@ use flowy_revision::{
 use flowy_sync::client_grid::{GridViewRevisionChangeset, GridViewRevisionPad};
 use flowy_sync::util::make_operations_from_revisions;
 use grid_rev_model::{FieldRevision, FieldTypeRevision, FilterRevision, GroupConfigurationRevision, RowRevision};
-use lib_infra::future::{to_future, Fut, FutureResult};
+use lib_infra::future::{to_fut, Fut, FutureResult};
 use lib_ot::core::EmptyAttributes;
 use std::sync::Arc;
 use tokio::sync::RwLock;
@@ -46,8 +46,8 @@ impl RevisionObjectSerializer for GridViewRevisionSerde {
     }
 }
 
-pub(crate) struct GridViewRevisionCompress();
-impl RevisionMergeable for GridViewRevisionCompress {
+pub(crate) struct GridViewRevisionMergeable();
+impl RevisionMergeable for GridViewRevisionMergeable {
     fn combine_revisions(&self, revisions: Vec<Revision>) -> FlowyResult<Bytes> {
         GridViewRevisionSerde::combine_revisions(revisions)
     }
@@ -58,7 +58,7 @@ pub(crate) struct GroupConfigurationReaderImpl(pub(crate) Arc<RwLock<GridViewRev
 impl GroupConfigurationReader for GroupConfigurationReaderImpl {
     fn get_configuration(&self) -> Fut<Option<Arc<GroupConfigurationRevision>>> {
         let view_pad = self.0.clone();
-        to_future(async move {
+        to_fut(async move {
             let mut groups = view_pad.read().await.get_all_groups();
             if groups.is_empty() {
                 None
@@ -88,7 +88,7 @@ impl GroupConfigurationWriter for GroupConfigurationWriterImpl {
         let view_pad = self.view_pad.clone();
         let field_id = field_id.to_owned();
 
-        to_future(async move {
+        to_fut(async move {
             let changeset = view_pad.write().await.insert_or_update_group_configuration(
                 &field_id,
                 &field_type,
@@ -109,10 +109,8 @@ pub(crate) async fn apply_change(
     change: GridViewRevisionChangeset,
 ) -> FlowyResult<()> {
     let GridViewRevisionChangeset { operations: delta, md5 } = change;
-    let (base_rev_id, rev_id) = rev_manager.next_rev_id_pair();
-    let delta_data = delta.json_bytes();
-    let revision = Revision::new(&rev_manager.object_id, base_rev_id, rev_id, delta_data, md5);
-    let _ = rev_manager.add_local_revision(&revision).await?;
+    let data = delta.json_bytes();
+    let _ = rev_manager.add_local_revision(data, md5).await?;
     Ok(())
 }
 
@@ -136,7 +134,7 @@ pub(crate) struct GridViewFilterDelegateImpl {
 impl FilterDelegate for GridViewFilterDelegateImpl {
     fn get_filter_rev(&self, filter_id: FilterType) -> Fut<Option<Arc<FilterRevision>>> {
         let pad = self.view_revision_pad.clone();
-        to_future(async move {
+        to_fut(async move {
             let field_type_rev: FieldTypeRevision = filter_id.field_type.into();
             let mut filters = pad.read().await.get_filters(&filter_id.field_id, &field_type_rev);
             if filters.is_empty() {

frontend/rust-lib/flowy-grid/tests/grid/field_test/script.rs

@@ -60,7 +60,7 @@ impl GridFieldTest {
             FieldScript::CreateField { params } => {
                 self.field_count += 1;
                 self.editor
-                    .create_new_field_rev(&params.field_type, params.type_option_data)
+                    .create_new_field_rev_with_type_option(&params.field_type, params.type_option_data)
                     .await
                     .unwrap();
                 self.field_revs = self.editor.get_field_revs(None).await.unwrap();

frontend/rust-lib/flowy-grid/tests/grid/group_test/test.rs

@@ -462,7 +462,7 @@ async fn group_insert_single_select_option_test() {
         AssertGroupCount(5),
     ];
     test.run_scripts(scripts).await;
-    let new_group = test.group_at_index(1).await;
+    let new_group = test.group_at_index(4).await;
     assert_eq!(new_group.desc, new_option_name);
 }
 

frontend/rust-lib/flowy-grid/tests/grid/mod.rs

@@ -4,3 +4,4 @@ mod field_test;
 mod filter_test;
 mod grid_editor;
 mod group_test;
+mod snapshot_test;

frontend/rust-lib/flowy-grid/tests/grid/snapshot_test/mod.rs

@@ -0,0 +1,2 @@
+mod script;
+mod test;

frontend/rust-lib/flowy-grid/tests/grid/snapshot_test/script.rs

@@ -0,0 +1,105 @@
+use crate::grid::grid_editor::GridEditorTest;
+
+use flowy_http_model::revision::Revision;
+use flowy_revision::{RevisionSnapshot, REVISION_WRITE_INTERVAL_IN_MILLIS};
+use flowy_sync::client_grid::{GridOperations, GridRevisionPad};
+use grid_rev_model::FieldRevision;
+use std::time::Duration;
+use tokio::time::sleep;
+
+pub enum SnapshotScript {
+    WriteSnapshot,
+    #[allow(dead_code)]
+    AssertSnapshot {
+        rev_id: i64,
+        expected: Option<RevisionSnapshot>,
+    },
+    AssertSnapshotContent {
+        snapshot: RevisionSnapshot,
+        expected: String,
+    },
+    CreateField {
+        field_rev: FieldRevision,
+    },
+    DeleteField {
+        field_rev: FieldRevision,
+    },
+}
+
+pub struct GridSnapshotTest {
+    inner: GridEditorTest,
+    pub current_snapshot: Option<RevisionSnapshot>,
+    pub current_revision: Option<Revision>,
+}
+
+impl GridSnapshotTest {
+    pub async fn new() -> Self {
+        let editor_test = GridEditorTest::new_table().await;
+        Self {
+            inner: editor_test,
+            current_snapshot: None,
+            current_revision: None,
+        }
+    }
+
+    pub fn grid_id(&self) -> String {
+        self.grid_id.clone()
+    }
+
+    pub async fn grid_pad(&self) -> GridRevisionPad {
+        let pad = self.editor.grid_pad();
+        let pad = (*pad.read().await).clone();
+        pad
+    }
+
+    pub async fn run_scripts(&mut self, scripts: Vec<SnapshotScript>) {
+        for script in scripts {
+            self.run_script(script).await;
+        }
+    }
+
+    pub async fn get_latest_snapshot(&self) -> Option<RevisionSnapshot> {
+        self.editor.rev_manager().read_snapshot(None).await.unwrap()
+    }
+
+    pub async fn run_script(&mut self, script: SnapshotScript) {
+        let rev_manager = self.editor.rev_manager();
+        match script {
+            SnapshotScript::WriteSnapshot => {
+                sleep(Duration::from_millis(2 * REVISION_WRITE_INTERVAL_IN_MILLIS)).await;
+                rev_manager.generate_snapshot().await;
+                self.current_snapshot = rev_manager.read_snapshot(None).await.unwrap();
+            }
+            SnapshotScript::AssertSnapshot { rev_id, expected } => {
+                let snapshot = rev_manager.read_snapshot(Some(rev_id)).await.unwrap();
+                assert_eq!(snapshot, expected);
+            }
+            SnapshotScript::AssertSnapshotContent { snapshot, expected } => {
+                let operations = GridOperations::from_bytes(snapshot.data).unwrap();
+                let pad = GridRevisionPad::from_operations(operations).unwrap();
+                assert_eq!(pad.json_str().unwrap(), expected);
+            }
+            SnapshotScript::CreateField { field_rev } => {
+                self.editor.create_new_field_rev(field_rev).await.unwrap();
+                let current_rev_id = rev_manager.rev_id();
+                self.current_revision = rev_manager.get_revision(current_rev_id).await;
+            }
+            SnapshotScript::DeleteField { field_rev } => {
+                self.editor.delete_field(&field_rev.id).await.unwrap();
+            }
+        }
+    }
+}
+impl std::ops::Deref for GridSnapshotTest {
+    type Target = GridEditorTest;
+
+    fn deref(&self) -> &Self::Target {
+        &self.inner
+    }
+}
+
+impl std::ops::DerefMut for GridSnapshotTest {
+    fn deref_mut(&mut self) -> &mut Self::Target {
+        &mut self.inner
+    }
+}

frontend/rust-lib/flowy-grid/tests/grid/snapshot_test/test.rs

@@ -0,0 +1,45 @@
+use crate::grid::field_test::util::create_text_field;
+use crate::grid::snapshot_test::script::{GridSnapshotTest, SnapshotScript::*};
+
+#[tokio::test]
+async fn snapshot_create_test() {
+    let mut test = GridSnapshotTest::new().await;
+    let (_, field_rev) = create_text_field(&test.grid_id());
+    let scripts = vec![CreateField { field_rev }, WriteSnapshot];
+    test.run_scripts(scripts).await;
+
+    let snapshot = test.current_snapshot.clone().unwrap();
+    let content = test.grid_pad().await.json_str().unwrap();
+    test.run_scripts(vec![AssertSnapshotContent {
+        snapshot,
+        expected: content,
+    }])
+    .await;
+}
+
+#[tokio::test]
+async fn snapshot_multi_version_test() {
+    let mut test = GridSnapshotTest::new().await;
+    let original_content = test.grid_pad().await.json_str().unwrap();
+
+    // Create a field
+    let (_, field_rev) = create_text_field(&test.grid_id());
+    let scripts = vec![
+        CreateField {
+            field_rev: field_rev.clone(),
+        },
+        WriteSnapshot,
+    ];
+    test.run_scripts(scripts).await;
+
+    // Delete a field
+    let scripts = vec![DeleteField { field_rev }, WriteSnapshot];
+    test.run_scripts(scripts).await;
+
+    // The latest snapshot will be the same as the original content.
+    test.run_scripts(vec![AssertSnapshotContent {
+        snapshot: test.get_latest_snapshot().await.unwrap(),
+        expected: original_content,
+    }])
+    .await;
+}

frontend/rust-lib/flowy-revision/Cargo.toml

@@ -18,6 +18,7 @@ strum_macros = "0.21"
 dashmap = "5"
 serde = { version = "1.0", features = ["derive"] }
 futures-util = "0.3.15"
+futures = "0.3.15"
 async-stream = "0.3.2"
 serde_json = {version = "1.0"}
 

frontend/rust-lib/flowy-revision/src/cache/reset.rs

@@ -67,13 +67,13 @@ where
             self.disk_cache.clone(),
             configuration,
         ));
-        let (revisions, _) = RevisionLoader {
+        let revisions = RevisionLoader {
             object_id: self.target.target_id().to_owned(),
             user_id: self.user_id.clone(),
             cloud: None,
             rev_persistence,
         }
-        .load()
+        .load_revisions()
         .await?;
 
         let bytes = self.target.reset_data(revisions)?;

frontend/rust-lib/flowy-revision/src/lib.rs

@@ -1,15 +1,14 @@
 mod cache;
 mod conflict_resolve;
-// mod history;
 mod rev_manager;
 mod rev_persistence;
-mod snapshot;
+mod rev_queue;
+mod rev_snapshot;
 mod ws_manager;
 
 pub use cache::*;
 pub use conflict_resolve::*;
-// pub use history::*;
 pub use rev_manager::*;
 pub use rev_persistence::*;
-pub use snapshot::*;
+pub use rev_snapshot::*;
 pub use ws_manager::*;

frontend/rust-lib/flowy-revision/src/rev_manager.rs

@@ -1,13 +1,17 @@
-use crate::disk::RevisionState;
-use crate::{RevisionPersistence, RevisionSnapshotDiskCache, RevisionSnapshotManager, WSDataProviderDataSource};
+use crate::rev_queue::{RevCommand, RevCommandSender, RevQueue};
+use crate::{
+    RevisionPersistence, RevisionSnapshot, RevisionSnapshotController, RevisionSnapshotDiskCache,
+    WSDataProviderDataSource,
+};
 use bytes::Bytes;
-use flowy_error::{FlowyError, FlowyResult};
+use flowy_error::{internal_error, FlowyError, FlowyResult};
 use flowy_http_model::revision::{Revision, RevisionRange};
 use flowy_http_model::util::md5;
 use lib_infra::future::FutureResult;
 use std::sync::atomic::AtomicI64;
 use std::sync::atomic::Ordering::SeqCst;
 use std::sync::Arc;
+use tokio::sync::{mpsc, oneshot};
 
 pub trait RevisionCloudService: Send + Sync {
     /// Read the object's revision from remote
@@ -67,13 +71,13 @@ pub trait RevisionMergeable: Send + Sync {
 pub struct RevisionManager<Connection> {
     pub object_id: String,
     user_id: String,
-    rev_id_counter: RevIdCounter,
+    rev_id_counter: Arc<RevIdCounter>,
     rev_persistence: Arc<RevisionPersistence<Connection>>,
-    #[allow(dead_code)]
-    rev_snapshot: Arc<RevisionSnapshotManager>,
+    rev_snapshot: Arc<RevisionSnapshotController<Connection>>,
     rev_compress: Arc<dyn RevisionMergeable>,
     #[cfg(feature = "flowy_unit_test")]
     rev_ack_notifier: tokio::sync::broadcast::Sender<i64>,
+    rev_queue: RevCommandSender,
 }
 
 impl<Connection: 'static> RevisionManager<Connection> {
@@ -88,45 +92,84 @@ impl<Connection: 'static> RevisionManager<Connection> {
         SP: 'static + RevisionSnapshotDiskCache,
         C: 'static + RevisionMergeable,
     {
-        let rev_id_counter = RevIdCounter::new(0);
+        let rev_id_counter = Arc::new(RevIdCounter::new(0));
         let rev_compress = Arc::new(rev_compress);
         let rev_persistence = Arc::new(rev_persistence);
-        let rev_snapshot = Arc::new(RevisionSnapshotManager::new(user_id, object_id, snapshot_persistence));
-
+        let rev_snapshot = RevisionSnapshotController::new(
+            user_id,
+            object_id,
+            snapshot_persistence,
+            rev_id_counter.clone(),
+            rev_persistence.clone(),
+            rev_compress.clone(),
+        );
+        let (rev_queue, receiver) = mpsc::channel(1000);
+        let queue = RevQueue::new(
+            object_id.to_owned(),
+            rev_id_counter.clone(),
+            rev_persistence.clone(),
+            rev_compress.clone(),
+            receiver,
+        );
+        tokio::spawn(queue.run());
         Self {
             object_id: object_id.to_string(),
             user_id: user_id.to_owned(),
             rev_id_counter,
             rev_persistence,
-            rev_snapshot,
+            rev_snapshot: Arc::new(rev_snapshot),
             rev_compress,
             #[cfg(feature = "flowy_unit_test")]
             rev_ack_notifier: tokio::sync::broadcast::channel(1).0,
+            rev_queue,
         }
     }
 
-    #[tracing::instrument(level = "debug", skip_all, fields(object_id) err)]
-    pub async fn initialize<B>(&mut self, cloud: Option<Arc<dyn RevisionCloudService>>) -> FlowyResult<B::Output>
+    #[tracing::instrument(level = "debug", skip_all, fields(deserializer, object) err)]
+    pub async fn initialize<B>(&mut self, _cloud: Option<Arc<dyn RevisionCloudService>>) -> FlowyResult<B::Output>
     where
         B: RevisionObjectDeserializer,
     {
-        let (revisions, rev_id) = RevisionLoader {
-            object_id: self.object_id.clone(),
-            user_id: self.user_id.clone(),
-            cloud,
-            rev_persistence: self.rev_persistence.clone(),
+        let revision_records = self.rev_persistence.load_all_records(&self.object_id)?;
+        tracing::Span::current().record("object", &self.object_id.as_str());
+        tracing::Span::current().record("deserializer", &std::any::type_name::<B>());
+        let revisions: Vec<Revision> = revision_records.iter().map(|record| record.revision.clone()).collect();
+        let current_rev_id = revisions.last().as_ref().map(|revision| revision.rev_id).unwrap_or(0);
+        match B::deserialize_revisions(&self.object_id, revisions) {
+            Ok(object) => {
+                let _ = self.rev_persistence.sync_revision_records(&revision_records).await?;
+                self.rev_id_counter.set(current_rev_id);
+                Ok(object)
+            }
+            Err(err) => match self.rev_snapshot.restore_from_snapshot::<B>(current_rev_id) {
+                None => Err(err),
+                Some((object, snapshot_rev)) => {
+                    let snapshot_rev_id = snapshot_rev.rev_id;
+                    let _ = self.rev_persistence.reset(vec![snapshot_rev]).await;
+                    // revision_records.retain(|record| record.revision.rev_id <= snapshot_rev_id);
+                    // let _ = self.rev_persistence.sync_revision_records(&revision_records).await?;
+                    self.rev_id_counter.set(snapshot_rev_id);
+                    Ok(object)
+                }
+            },
         }
-        .load()
-        .await?;
-        self.rev_id_counter.set(rev_id);
-        tracing::Span::current().record("object_id", &self.object_id.as_str());
-        B::deserialize_revisions(&self.object_id, revisions)
     }
 
     pub async fn close(&self) {
         let _ = self.rev_persistence.compact_lagging_revisions(&self.rev_compress).await;
     }
 
+    pub async fn generate_snapshot(&self) {
+        self.rev_snapshot.generate_snapshot().await;
+    }
+
+    pub async fn read_snapshot(&self, rev_id: Option<i64>) -> FlowyResult<Option<RevisionSnapshot>> {
+        match rev_id {
+            None => self.rev_snapshot.read_last_snapshot(),
+            Some(rev_id) => self.rev_snapshot.read_snapshot(rev_id),
+        }
+    }
+
     pub async fn load_revisions(&self) -> FlowyResult<Vec<Revision>> {
         let revisions = RevisionLoader {
             object_id: self.object_id.clone(),
@@ -154,23 +197,23 @@ impl<Connection: 'static> RevisionManager<Connection> {
         }
 
         let _ = self.rev_persistence.add_ack_revision(revision).await?;
-        // self.rev_history.add_revision(revision).await;
         self.rev_id_counter.set(revision.rev_id);
         Ok(())
     }
 
+    /// Adds the revision that generated by user editing
     // #[tracing::instrument(level = "trace", skip_all, err)]
-    pub async fn add_local_revision(&self, revision: &Revision) -> Result<(), FlowyError> {
-        if revision.bytes.is_empty() {
-            return Err(FlowyError::internal().context("Local revisions is empty"));
+    pub async fn add_local_revision(&self, data: Bytes, object_md5: String) -> Result<i64, FlowyError> {
+        if data.is_empty() {
+            return Err(FlowyError::internal().context("The data of the revisions is empty"));
         }
-        let rev_id = self
-            .rev_persistence
-            .add_sync_revision(revision, &self.rev_compress)
-            .await?;
-        // self.rev_history.add_revision(revision).await;
-        self.rev_id_counter.set(rev_id);
-        Ok(())
+        self.rev_snapshot.generate_snapshot_if_need();
+        let (ret, rx) = oneshot::channel();
+        self.rev_queue
+            .send(RevCommand::RevisionData { data, object_md5, ret })
+            .await
+            .map_err(internal_error)?;
+        rx.await.map_err(internal_error)?
     }
 
     #[tracing::instrument(level = "debug", skip(self), err)]
@@ -256,40 +299,6 @@ pub struct RevisionLoader<Connection> {
 }
 
 impl<Connection: 'static> RevisionLoader<Connection> {
-    pub async fn load(&self) -> Result<(Vec<Revision>, i64), FlowyError> {
-        let records = self.rev_persistence.load_all_records(&self.object_id)?;
-        let revisions: Vec<Revision>;
-        let mut rev_id = 0;
-        if records.is_empty() && self.cloud.is_some() {
-            let remote_revisions = self
-                .cloud
-                .as_ref()
-                .unwrap()
-                .fetch_object(&self.user_id, &self.object_id)
-                .await?;
-            for revision in &remote_revisions {
-                rev_id = revision.rev_id;
-                let _ = self.rev_persistence.add_ack_revision(revision).await?;
-            }
-            revisions = remote_revisions;
-        } else {
-            for record in &records {
-                rev_id = record.revision.rev_id;
-                if record.state == RevisionState::Sync {
-                    // Sync the records if their state is RevisionState::Sync.
-                    let _ = self.rev_persistence.sync_revision(&record.revision).await?;
-                }
-            }
-            revisions = records.into_iter().map(|record| record.revision).collect::<_>();
-        }
-
-        if let Some(revision) = revisions.last() {
-            debug_assert_eq!(rev_id, revision.rev_id);
-        }
-
-        Ok((revisions, rev_id))
-    }
-
     pub async fn load_revisions(&self) -> Result<Vec<Revision>, FlowyError> {
         let records = self.rev_persistence.load_all_records(&self.object_id)?;
         let revisions = records.into_iter().map(|record| record.revision).collect::<_>();
@@ -377,6 +386,7 @@ impl RevIdCounter {
         let _ = self.0.fetch_add(1, SeqCst);
         self.value()
     }
+
     pub fn value(&self) -> i64 {
         self.0.load(SeqCst)
     }

frontend/rust-lib/flowy-revision/src/rev_persistence.rs

@@ -7,7 +7,8 @@ use crate::memory::RevisionMemoryCache;
 use crate::RevisionMergeable;
 use flowy_error::{internal_error, FlowyError, FlowyResult};
 use flowy_http_model::revision::{Revision, RevisionRange};
-use std::collections::VecDeque;
+use std::collections::{HashMap, VecDeque};
+
 use std::{borrow::Cow, sync::Arc};
 use tokio::sync::RwLock;
 use tokio::task::spawn_blocking;
@@ -16,7 +17,12 @@ pub const REVISION_WRITE_INTERVAL_IN_MILLIS: u64 = 600;
 
 #[derive(Clone)]
 pub struct RevisionPersistenceConfiguration {
+    // If the number of revisions that didn't sync to the server greater than the merge_threshold
+    // then these revisions will be merged into one revision.
     merge_threshold: usize,
+
+    /// Indicates that the revisions that didn't sync to the server can be merged into one when
+    /// `compact_lagging_revisions` get called.
     merge_lagging: bool,
 }
 
@@ -46,6 +52,9 @@ impl std::default::Default for RevisionPersistenceConfiguration {
     }
 }
 
+/// Represents as the persistence of revisions including memory or disk cache.
+/// The generic parameter, `Connection`, represents as the disk backend's connection.
+/// If the backend is SQLite, then the Connect will be SQLiteConnect.
 pub struct RevisionPersistence<Connection> {
     user_id: String,
     object_id: String,
@@ -99,15 +108,6 @@ where
         self.add(revision.clone(), RevisionState::Ack, true).await
     }
 
-    /// Append the revision that already existed in the local DB state to sync sequence
-    #[tracing::instrument(level = "trace", skip(self), fields(rev_id, object_id=%self.object_id), err)]
-    pub(crate) async fn sync_revision(&self, revision: &Revision) -> FlowyResult<()> {
-        tracing::Span::current().record("rev_id", &revision.rev_id);
-        self.add(revision.clone(), RevisionState::Sync, false).await?;
-        self.sync_seq.write().await.recv(revision.rev_id)?;
-        Ok(())
-    }
-
     #[tracing::instrument(level = "trace", skip_all, err)]
     pub async fn compact_lagging_revisions<'a>(
         &'a self,
@@ -144,22 +144,36 @@ where
         Ok(())
     }
 
+    /// Sync the each records' revisions to remote if its state is `RevisionState::Sync`.
+    ///
+    pub(crate) async fn sync_revision_records(&self, records: &[SyncRecord]) -> FlowyResult<()> {
+        let mut sync_seq = self.sync_seq.write().await;
+        for record in records {
+            if record.state == RevisionState::Sync {
+                self.add(record.revision.clone(), RevisionState::Sync, false).await?;
+                sync_seq.recv(record.revision.rev_id)?; // Sync the records if their state is RevisionState::Sync.
+            }
+        }
+        Ok(())
+    }
+
     /// Save the revision to disk and append it to the end of the sync sequence.
+    /// The returned value,rev_id, will be different with the passed-in revision's rev_id if
+    /// multiple revisions are merged into one.
     #[tracing::instrument(level = "trace", skip_all, fields(rev_id, compact_range, object_id=%self.object_id), err)]
-    pub(crate) async fn add_sync_revision<'a>(
+    pub(crate) async fn add_local_revision<'a>(
         &'a self,
-        new_revision: &'a Revision,
+        new_revision: Revision,
         rev_compress: &Arc<dyn RevisionMergeable + 'a>,
     ) -> FlowyResult<i64> {
         let mut sync_seq = self.sync_seq.write().await;
-        let compact_length = sync_seq.compact_length;
 
         // Before the new_revision is pushed into the sync_seq, we check if the current `compact_length` of the
         // sync_seq is less equal to or greater than the merge threshold. If yes, it's needs to merged
         // with the new_revision into one revision.
         let mut compact_seq = VecDeque::default();
         // tracing::info!("{}", compact_seq)
-        if compact_length >= self.configuration.merge_threshold - 1 {
+        if sync_seq.compact_length >= self.configuration.merge_threshold - 1 {
             compact_seq.extend(sync_seq.compact());
         }
         if !compact_seq.is_empty() {
@@ -172,7 +186,7 @@ where
             let mut revisions = self.revisions_in_range(&range).await?;
             debug_assert_eq!(range.len() as usize, revisions.len());
             // append the new revision
-            revisions.push(new_revision.clone());
+            revisions.push(new_revision);
 
             // compact multiple revisions into one
             let merged_revision = rev_compress.merge_revisions(&self.user_id, &self.object_id, revisions)?;
@@ -184,10 +198,11 @@ where
             self.compact(&range, merged_revision).await?;
             Ok(rev_id)
         } else {
-            tracing::Span::current().record("rev_id", &new_revision.rev_id);
-            self.add(new_revision.clone(), RevisionState::Sync, true).await?;
-            sync_seq.merge_recv(new_revision.rev_id)?;
-            Ok(new_revision.rev_id)
+            let rev_id = new_revision.rev_id;
+            tracing::Span::current().record("rev_id", &rev_id);
+            self.add(new_revision, RevisionState::Sync, true).await?;
+            sync_seq.merge_recv(rev_id)?;
+            Ok(rev_id)
         }
     }
 
@@ -290,7 +305,16 @@ where
     }
 
     pub fn load_all_records(&self, object_id: &str) -> FlowyResult<Vec<SyncRecord>> {
-        self.disk_cache.read_revision_records(object_id, None)
+        let mut record_ids = HashMap::new();
+        let mut records = vec![];
+        for record in self.disk_cache.read_revision_records(object_id, None)? {
+            let rev_id = record.revision.rev_id;
+            if record_ids.get(&rev_id).is_none() {
+                records.push(record);
+            }
+            record_ids.insert(rev_id, rev_id);
+        }
+        Ok(records)
     }
 
     // Read the revision which rev_id >= range.start && rev_id <= range.end
@@ -306,11 +330,6 @@ where
                 .map_err(internal_error)??;
 
             if records.len() != range_len {
-                // #[cfg(debug_assertions)]
-                // records.iter().for_each(|record| {
-                //     let delta = PlainDelta::from_bytes(&record.revision.delta_data).unwrap();
-                //     tracing::trace!("{}", delta.to_string());
-                // });
                 tracing::error!("Expect revision len {},but receive {}", range_len, records.len());
             }
         }
@@ -319,6 +338,14 @@ where
             .map(|record| record.revision)
             .collect::<Vec<Revision>>())
     }
+
+    #[allow(dead_code)]
+    pub fn delete_revisions_from_range(&self, range: RevisionRange) -> FlowyResult<()> {
+        let _ = self
+            .disk_cache
+            .delete_revision_records(&self.object_id, Some(range.to_rev_ids()))?;
+        Ok(())
+    }
 }
 
 impl<C> RevisionMemoryCacheDelegate for Arc<dyn RevisionDiskCache<C, Error = FlowyError>> {
@@ -378,9 +405,8 @@ impl DeferSyncSequence {
         // The last revision's rev_id must be greater than the new one.
         if let Some(rev_id) = self.rev_ids.back() {
             if *rev_id >= new_rev_id {
-                return Err(
-                    FlowyError::internal().context(format!("The new revision's id must be greater than {}", rev_id))
-                );
+                tracing::error!("The new revision's id must be greater than {}", rev_id);
+                return Ok(());
             }
         }
         self.rev_ids.push_back(new_rev_id);

frontend/rust-lib/flowy-revision/src/rev_queue.rs

@@ -0,0 +1,98 @@
+use crate::{RevIdCounter, RevisionMergeable, RevisionPersistence};
+use async_stream::stream;
+use bytes::Bytes;
+use flowy_error::FlowyError;
+use flowy_http_model::revision::Revision;
+use futures::stream::StreamExt;
+use std::sync::Arc;
+use tokio::sync::mpsc::{Receiver, Sender};
+use tokio::sync::oneshot;
+
+#[derive(Debug)]
+pub(crate) enum RevCommand {
+    RevisionData {
+        data: Bytes,
+        object_md5: String,
+        ret: Ret<i64>,
+    },
+}
+
+pub(crate) struct RevQueue<Connection> {
+    object_id: String,
+    rev_id_counter: Arc<RevIdCounter>,
+    rev_persistence: Arc<RevisionPersistence<Connection>>,
+    rev_compress: Arc<dyn RevisionMergeable>,
+    receiver: Option<RevCommandReceiver>,
+}
+
+impl<Connection> RevQueue<Connection>
+where
+    Connection: 'static,
+{
+    pub fn new(
+        object_id: String,
+        rev_id_counter: Arc<RevIdCounter>,
+        rev_persistence: Arc<RevisionPersistence<Connection>>,
+        rev_compress: Arc<dyn RevisionMergeable>,
+        receiver: RevCommandReceiver,
+    ) -> Self {
+        Self {
+            object_id,
+            rev_id_counter,
+            rev_persistence,
+            rev_compress,
+            receiver: Some(receiver),
+        }
+    }
+
+    pub async fn run(mut self) {
+        let mut receiver = self.receiver.take().expect("Only take once");
+        let object_id = self.object_id.clone();
+        let stream = stream! {
+            loop {
+                match receiver.recv().await {
+                    Some(msg) => yield msg,
+                    None => {
+                        tracing::trace!("{}'s RevQueue exist", &object_id);
+                        break
+                    },
+                }
+            }
+        };
+        stream
+            .for_each(|command| async {
+                match self.handle_command(command).await {
+                    Ok(_) => {}
+                    Err(e) => tracing::debug!("[RevQueue]: {}", e),
+                }
+            })
+            .await;
+    }
+
+    async fn handle_command(&self, command: RevCommand) -> Result<(), FlowyError> {
+        match command {
+            RevCommand::RevisionData {
+                data,
+                object_md5: data_md5,
+                ret,
+            } => {
+                let base_rev_id = self.rev_id_counter.value();
+                let rev_id = self.rev_id_counter.next_id();
+                let revision = Revision::new(&self.object_id, base_rev_id, rev_id, data, data_md5);
+
+                let new_rev_id = self
+                    .rev_persistence
+                    .add_local_revision(revision, &self.rev_compress)
+                    .await?;
+
+                self.rev_id_counter.set(new_rev_id);
+                let _ = ret.send(Ok(new_rev_id));
+            }
+        }
+        Ok(())
+    }
+}
+
+pub(crate) type RevCommandSender = Sender<RevCommand>;
+pub(crate) type RevCommandReceiver = Receiver<RevCommand>;
+pub(crate) type Ret<T> = oneshot::Sender<Result<T, FlowyError>>;

frontend/rust-lib/flowy-revision/src/rev_snapshot.rs

@@ -0,0 +1,174 @@
+#![allow(clippy::all)]
+#![allow(dead_code)]
+#![allow(unused_variables)]
+use crate::{RevIdCounter, RevisionMergeable, RevisionObjectDeserializer, RevisionPersistence};
+use bytes::Bytes;
+use flowy_error::FlowyResult;
+use flowy_http_model::revision::Revision;
+use std::sync::atomic::AtomicI64;
+use std::sync::atomic::Ordering::SeqCst;
+use std::sync::Arc;
+
+pub trait RevisionSnapshotDiskCache: Send + Sync {
+    fn write_snapshot(&self, rev_id: i64, data: Vec<u8>) -> FlowyResult<()>;
+    fn read_snapshot(&self, rev_id: i64) -> FlowyResult<Option<RevisionSnapshot>>;
+    fn read_last_snapshot(&self) -> FlowyResult<Option<RevisionSnapshot>>;
+}
+
+/// Do nothing but just used to clam the rust compiler about the generic parameter `SP` of `RevisionManager`
+///  
+pub struct PhantomSnapshotPersistence();
+impl RevisionSnapshotDiskCache for PhantomSnapshotPersistence {
+    fn write_snapshot(&self, rev_id: i64, data: Vec<u8>) -> FlowyResult<()> {
+        Ok(())
+    }
+
+    fn read_snapshot(&self, rev_id: i64) -> FlowyResult<Option<RevisionSnapshot>> {
+        Ok(None)
+    }
+
+    fn read_last_snapshot(&self) -> FlowyResult<Option<RevisionSnapshot>> {
+        Ok(None)
+    }
+}
+
+const AUTO_GEN_SNAPSHOT_PER_10_REVISION: i64 = 10;
+
+pub struct RevisionSnapshotController<Connection> {
+    user_id: String,
+    object_id: String,
+    disk_cache: Arc<dyn RevisionSnapshotDiskCache>,
+    rev_id_counter: Arc<RevIdCounter>,
+    rev_persistence: Arc<RevisionPersistence<Connection>>,
+    rev_compress: Arc<dyn RevisionMergeable>,
+    start_rev_id: AtomicI64,
+}
+
+impl<Connection> RevisionSnapshotController<Connection>
+where
+    Connection: 'static,
+{
+    pub fn new<D>(
+        user_id: &str,
+        object_id: &str,
+        disk_cache: D,
+        rev_id_counter: Arc<RevIdCounter>,
+        revision_persistence: Arc<RevisionPersistence<Connection>>,
+        revision_compress: Arc<dyn RevisionMergeable>,
+    ) -> Self
+    where
+        D: RevisionSnapshotDiskCache + 'static,
+    {
+        let disk_cache = Arc::new(disk_cache);
+        Self {
+            user_id: user_id.to_string(),
+            object_id: object_id.to_string(),
+            disk_cache,
+            rev_id_counter,
+            start_rev_id: AtomicI64::new(0),
+            rev_persistence: revision_persistence,
+            rev_compress: revision_compress,
+        }
+    }
+
+    pub async fn generate_snapshot(&self) {
+        if let Some((rev_id, bytes)) = self.generate_snapshot_data() {
+            if let Err(e) = self.disk_cache.write_snapshot(rev_id, bytes.to_vec()) {
+                tracing::error!("Save snapshot failed: {}", e);
+            }
+        }
+    }
+
+    /// Find the nearest revision base on the passed-in rev_id
+    pub fn restore_from_snapshot<B>(&self, rev_id: i64) -> Option<(B::Output, Revision)>
+    where
+        B: RevisionObjectDeserializer,
+    {
+        tracing::trace!("Try to find if {} has snapshot", self.object_id);
+        let snapshot = self.disk_cache.read_last_snapshot().ok()??;
+        let snapshot_rev_id = snapshot.rev_id;
+        let revision = Revision::new(
+            &self.object_id,
+            snapshot.base_rev_id,
+            snapshot.rev_id,
+            snapshot.data,
+            "".to_owned(),
+        );
+        tracing::trace!(
+            "Try to restore from snapshot: {}, {}",
+            snapshot.base_rev_id,
+            snapshot.rev_id
+        );
+        let object = B::deserialize_revisions(&self.object_id, vec![revision.clone()]).ok()?;
+        tracing::trace!(
+            "Restore {} from snapshot with rev_id: {}",
+            self.object_id,
+            snapshot_rev_id
+        );
+
+        Some((object, revision))
+    }
+
+    pub fn generate_snapshot_if_need(&self) {
+        let current_rev_id = self.rev_id_counter.value();
+        let start_rev_id = self.get_start_rev_id();
+        if current_rev_id <= start_rev_id {
+            return;
+        }
+
+        if (current_rev_id - start_rev_id) >= AUTO_GEN_SNAPSHOT_PER_10_REVISION {
+            if let Some((rev_id, bytes)) = self.generate_snapshot_data() {
+                let disk_cache = self.disk_cache.clone();
+                tokio::spawn(async move {
+                    let _ = disk_cache.write_snapshot(rev_id, bytes.to_vec());
+                });
+            }
+            self.set_start_rev_id(current_rev_id);
+        }
+    }
+
+    fn generate_snapshot_data(&self) -> Option<(i64, Bytes)> {
+        let revisions = self
+            .rev_persistence
+            .load_all_records(&self.object_id)
+            .map(|records| {
+                records
+                    .into_iter()
+                    .map(|record| record.revision)
+                    .collect::<Vec<Revision>>()
+            })
+            .ok()?;
+
+        if revisions.is_empty() {
+            return None;
+        }
+
+        let data = self.rev_compress.combine_revisions(revisions).ok()?;
+        let rev_id = self.rev_id_counter.value();
+        Some((rev_id, data))
+    }
+
+    fn get_start_rev_id(&self) -> i64 {
+        self.start_rev_id.load(SeqCst)
+    }
+
+    fn set_start_rev_id(&self, rev_id: i64) {
+        let _ = self.start_rev_id.fetch_update(SeqCst, SeqCst, |_| Some(rev_id));
+    }
+}
+
+impl<Connection> std::ops::Deref for RevisionSnapshotController<Connection> {
+    type Target = Arc<dyn RevisionSnapshotDiskCache>;
+
+    fn deref(&self) -> &Self::Target {
+        &self.disk_cache
+    }
+}
+
+#[derive(Debug, PartialEq, Eq, Clone)]
+pub struct RevisionSnapshot {
+    pub rev_id: i64,
+    pub base_rev_id: i64,
+    pub timestamp: i64,
+    pub data: Bytes,
+}

frontend/rust-lib/flowy-revision/src/snapshot/mod.rs

@@ -1,5 +0,0 @@
-mod persistence;
-mod rev_snapshot;
-
-pub use persistence::*;
-pub use rev_snapshot::*;

frontend/rust-lib/flowy-revision/src/snapshot/persistence.rs

@@ -1,32 +0,0 @@
-#![allow(clippy::all)]
-#![allow(dead_code)]
-#![allow(unused_variables)]
-use crate::{RevisionSnapshotDiskCache, RevisionSnapshotInfo};
-use flowy_error::FlowyResult;
-
-pub struct SQLiteRevisionSnapshotPersistence<Connection> {
-    object_id: String,
-    pool: Connection,
-}
-
-impl<Connection: 'static> SQLiteRevisionSnapshotPersistence<Connection> {
-    pub fn new(object_id: &str, pool: Connection) -> Self {
-        Self {
-            object_id: object_id.to_string(),
-            pool,
-        }
-    }
-}
-
-impl<Connection> RevisionSnapshotDiskCache for SQLiteRevisionSnapshotPersistence<Connection>
-where
-    Connection: Send + Sync + 'static,
-{
-    fn write_snapshot(&self, object_id: &str, rev_id: i64, data: Vec<u8>) -> FlowyResult<()> {
-        todo!()
-    }
-
-    fn read_snapshot(&self, object_id: &str, rev_id: i64) -> FlowyResult<RevisionSnapshotInfo> {
-        todo!()
-    }
-}

frontend/rust-lib/flowy-revision/src/snapshot/rev_snapshot.rs

@@ -1,32 +0,0 @@
-#![allow(clippy::all)]
-#![allow(dead_code)]
-#![allow(unused_variables)]
-use flowy_error::FlowyResult;
-use std::sync::Arc;
-
-pub trait RevisionSnapshotDiskCache: Send + Sync {
-    fn write_snapshot(&self, object_id: &str, rev_id: i64, data: Vec<u8>) -> FlowyResult<()>;
-    fn read_snapshot(&self, object_id: &str, rev_id: i64) -> FlowyResult<RevisionSnapshotInfo>;
-}
-
-pub struct RevisionSnapshotManager {
-    user_id: String,
-    object_id: String,
-    disk_cache: Arc<dyn RevisionSnapshotDiskCache>,
-}
-
-impl RevisionSnapshotManager {
-    pub fn new<D>(user_id: &str, object_id: &str, disk_cache: D) -> Self
-    where
-        D: RevisionSnapshotDiskCache + 'static,
-    {
-        let disk_cache = Arc::new(disk_cache);
-        Self {
-            user_id: user_id.to_string(),
-            object_id: object_id.to_string(),
-            disk_cache,
-        }
-    }
-}
-
-pub struct RevisionSnapshotInfo {}

frontend/rust-lib/flowy-revision/tests/revision_test/local_revision_test.rs

@@ -3,12 +3,9 @@ use crate::revision_test::script::{RevisionScript::*, RevisionTest};
 #[tokio::test]
 async fn revision_sync_test() {
     let test = RevisionTest::new().await;
-    let (base_rev_id, rev_id) = test.next_rev_id_pair();
-
+    let rev_id = 1;
     test.run_script(AddLocalRevision {
         content: "123".to_string(),
-        base_rev_id,
-        rev_id,
     })
     .await;
 
@@ -20,21 +17,21 @@ async fn revision_sync_test() {
 #[tokio::test]
 async fn revision_compress_2_revisions_with_2_threshold_test() {
     let test = RevisionTest::new_with_configuration(2).await;
-
     test.run_script(AddLocalRevision2 {
         content: "123".to_string(),
-        pair_rev_id: test.next_rev_id_pair(),
     })
     .await;
 
     test.run_script(AddLocalRevision2 {
         content: "456".to_string(),
-        pair_rev_id: test.next_rev_id_pair(),
     })
     .await;
 
     test.run_scripts(vec![
         AssertNextSyncRevisionId { rev_id: Some(1) },
+        AssertNextSyncRevisionContent {
+            expected: "123456".to_string(),
+        },
         AckRevision { rev_id: 1 },
         AssertNextSyncRevisionId { rev_id: None },
     ])
@@ -44,36 +41,25 @@ async fn revision_compress_2_revisions_with_2_threshold_test() {
 #[tokio::test]
 async fn revision_compress_4_revisions_with_threshold_2_test() {
     let test = RevisionTest::new_with_configuration(2).await;
-    let (base_rev_id, rev_id_1) = test.next_rev_id_pair();
-
+    let rev_id_1 = 1;
     test.run_script(AddLocalRevision {
         content: "1".to_string(),
-        base_rev_id,
-        rev_id: rev_id_1,
     })
     .await;
 
-    let (base_rev_id, rev_id_2) = test.next_rev_id_pair();
+    let rev_id_2 = 2;
     test.run_script(AddLocalRevision {
         content: "2".to_string(),
-        base_rev_id,
-        rev_id: rev_id_2,
     })
     .await;
 
-    let (base_rev_id, rev_id_3) = test.next_rev_id_pair();
     test.run_script(AddLocalRevision {
         content: "3".to_string(),
-        base_rev_id,
-        rev_id: rev_id_3,
     })
     .await;
 
-    let (base_rev_id, rev_id_4) = test.next_rev_id_pair();
     test.run_script(AddLocalRevision {
         content: "4".to_string(),
-        base_rev_id,
-        rev_id: rev_id_4,
     })
     .await;
 
@@ -96,68 +82,45 @@ async fn revision_compress_4_revisions_with_threshold_2_test() {
 #[tokio::test]
 async fn revision_compress_8_revisions_with_threshold_4_test() {
     let test = RevisionTest::new_with_configuration(4).await;
-    let (base_rev_id, rev_id_1) = test.next_rev_id_pair();
-
+    let rev_id_1 = 1;
     test.run_script(AddLocalRevision {
         content: "1".to_string(),
-        base_rev_id,
-        rev_id: rev_id_1,
     })
     .await;
 
-    let (base_rev_id, rev_id_2) = test.next_rev_id_pair();
     test.run_script(AddLocalRevision {
         content: "2".to_string(),
-        base_rev_id,
-        rev_id: rev_id_2,
     })
     .await;
 
-    let (base_rev_id, rev_id_3) = test.next_rev_id_pair();
     test.run_script(AddLocalRevision {
         content: "3".to_string(),
-        base_rev_id,
-        rev_id: rev_id_3,
     })
     .await;
 
-    let (base_rev_id, rev_id_4) = test.next_rev_id_pair();
     test.run_script(AddLocalRevision {
         content: "4".to_string(),
-        base_rev_id,
-        rev_id: rev_id_4,
     })
     .await;
 
-    let (base_rev_id, rev_id_a) = test.next_rev_id_pair();
+    let rev_id_a = 2;
     test.run_script(AddLocalRevision {
         content: "a".to_string(),
-        base_rev_id,
-        rev_id: rev_id_a,
     })
     .await;
 
-    let (base_rev_id, rev_id_b) = test.next_rev_id_pair();
     test.run_script(AddLocalRevision {
         content: "b".to_string(),
-        base_rev_id,
-        rev_id: rev_id_b,
     })
     .await;
 
-    let (base_rev_id, rev_id_c) = test.next_rev_id_pair();
     test.run_script(AddLocalRevision {
         content: "c".to_string(),
-        base_rev_id,
-        rev_id: rev_id_c,
     })
     .await;
 
-    let (base_rev_id, rev_id_d) = test.next_rev_id_pair();
     test.run_script(AddLocalRevision {
         content: "d".to_string(),
-        base_rev_id,
-        rev_id: rev_id_d,
     })
     .await;
 
@@ -183,13 +146,7 @@ async fn revision_merge_per_5_revision_test() {
     let test = RevisionTest::new_with_configuration(5).await;
     for i in 0..20 {
         let content = format!("{}", i);
-        let (base_rev_id, rev_id) = test.next_rev_id_pair();
-        test.run_script(AddLocalRevision {
-            content,
-            base_rev_id,
-            rev_id,
-        })
-        .await;
+        test.run_script(AddLocalRevision { content }).await;
     }
 
     test.run_scripts(vec![
@@ -220,13 +177,7 @@ async fn revision_merge_per_100_revision_test() {
     let test = RevisionTest::new_with_configuration(100).await;
     for i in 0..1000 {
         let content = format!("{}", i);
-        let (base_rev_id, rev_id) = test.next_rev_id_pair();
-        test.run_script(AddLocalRevision {
-            content,
-            base_rev_id,
-            rev_id,
-        })
-        .await;
+        test.run_script(AddLocalRevision { content }).await;
     }
 
     test.run_scripts(vec![AssertNumberOfSyncRevisions { num: 10 }]).await;
@@ -236,11 +187,8 @@ async fn revision_merge_per_100_revision_test() {
 async fn revision_merge_per_100_revision_test2() {
     let test = RevisionTest::new_with_configuration(100).await;
     for i in 0..50 {
-        let (base_rev_id, rev_id) = test.next_rev_id_pair();
         test.run_script(AddLocalRevision {
             content: format!("{}", i),
-            base_rev_id,
-            rev_id,
         })
         .await;
     }
@@ -252,11 +200,8 @@ async fn revision_merge_per_100_revision_test2() {
 async fn revision_merge_per_1000_revision_test() {
     let test = RevisionTest::new_with_configuration(1000).await;
     for i in 0..100000 {
-        let (base_rev_id, rev_id) = test.next_rev_id_pair();
         test.run_script(AddLocalRevision {
             content: format!("{}", i),
-            base_rev_id,
-            rev_id,
         })
         .await;
     }
@@ -267,50 +212,42 @@ async fn revision_merge_per_1000_revision_test() {
 #[tokio::test]
 async fn revision_compress_revision_test() {
     let test = RevisionTest::new_with_configuration(2).await;
-
     test.run_scripts(vec![
         AddLocalRevision2 {
             content: "1".to_string(),
-            pair_rev_id: test.next_rev_id_pair(),
         },
         AddLocalRevision2 {
             content: "2".to_string(),
-            pair_rev_id: test.next_rev_id_pair(),
         },
         AddLocalRevision2 {
             content: "3".to_string(),
-            pair_rev_id: test.next_rev_id_pair(),
         },
         AddLocalRevision2 {
             content: "4".to_string(),
-            pair_rev_id: test.next_rev_id_pair(),
         },
         AssertNumberOfSyncRevisions { num: 2 },
     ])
     .await;
 }
+
 #[tokio::test]
 async fn revision_compress_revision_while_recv_ack_test() {
     let test = RevisionTest::new_with_configuration(2).await;
     test.run_scripts(vec![
         AddLocalRevision2 {
             content: "1".to_string(),
-            pair_rev_id: test.next_rev_id_pair(),
         },
         AckRevision { rev_id: 1 },
         AddLocalRevision2 {
             content: "2".to_string(),
-            pair_rev_id: test.next_rev_id_pair(),
         },
         AckRevision { rev_id: 2 },
         AddLocalRevision2 {
             content: "3".to_string(),
-            pair_rev_id: test.next_rev_id_pair(),
         },
         AckRevision { rev_id: 3 },
         AddLocalRevision2 {
             content: "4".to_string(),
-            pair_rev_id: test.next_rev_id_pair(),
         },
         AssertNumberOfSyncRevisions { num: 4 },
     ])

frontend/rust-lib/flowy-revision/tests/revision_test/revision_disk_test.rs

@@ -4,12 +4,8 @@ use crate::revision_test::script::{InvalidRevisionObject, RevisionTest};
 #[tokio::test]
 async fn revision_write_to_disk_test() {
     let test = RevisionTest::new_with_configuration(2).await;
-    let (base_rev_id, rev_id) = test.next_rev_id_pair();
-
     test.run_script(AddLocalRevision {
         content: "123".to_string(),
-        base_rev_id,
-        rev_id,
     })
     .await;
 
@@ -25,11 +21,8 @@ async fn revision_write_to_disk_test() {
 async fn revision_write_to_disk_with_merge_test() {
     let test = RevisionTest::new_with_configuration(100).await;
     for i in 0..1000 {
-        let (base_rev_id, rev_id) = test.next_rev_id_pair();
         test.run_script(AddLocalRevision {
             content: format!("{}", i),
-            base_rev_id,
-            rev_id,
         })
         .await;
     }
@@ -46,12 +39,9 @@ async fn revision_write_to_disk_with_merge_test() {
 #[tokio::test]
 async fn revision_read_from_disk_test() {
     let test = RevisionTest::new_with_configuration(2).await;
-    let (base_rev_id, rev_id) = test.next_rev_id_pair();
     test.run_scripts(vec![
         AddLocalRevision {
             content: "123".to_string(),
-            base_rev_id,
-            rev_id,
         },
         AssertNumberOfRevisionsInDisk { num: 0 },
         WaitWhenWriteToDisk,
@@ -60,16 +50,13 @@ async fn revision_read_from_disk_test() {
     .await;
 
     let test = RevisionTest::new_with_other(test).await;
-    let (base_rev_id, rev_id) = test.next_rev_id_pair();
     test.run_scripts(vec![
         AssertNextSyncRevisionId { rev_id: Some(1) },
         AddLocalRevision {
             content: "456".to_string(),
-            base_rev_id,
-            rev_id,
         },
         AckRevision { rev_id: 1 },
-        AssertNextSyncRevisionId { rev_id: Some(rev_id) },
+        AssertNextSyncRevisionId { rev_id: Some(2) },
     ])
     .await;
 }
@@ -77,20 +64,14 @@ async fn revision_read_from_disk_test() {
 #[tokio::test]
 async fn revision_read_from_disk_with_invalid_record_test() {
     let test = RevisionTest::new_with_configuration(2).await;
-    let (base_rev_id, rev_id) = test.next_rev_id_pair();
     test.run_scripts(vec![AddLocalRevision {
         content: "123".to_string(),
-        base_rev_id,
-        rev_id,
     }])
     .await;
 
-    let (base_rev_id, rev_id) = test.next_rev_id_pair();
     test.run_scripts(vec![
         AddInvalidLocalRevision {
             bytes: InvalidRevisionObject::new().to_bytes(),
-            base_rev_id,
-            rev_id,
         },
         WaitWhenWriteToDisk,
     ])

frontend/rust-lib/flowy-revision/tests/revision_test/script.rs

@@ -3,8 +3,7 @@ use flowy_error::{internal_error, FlowyError, FlowyResult};
 use flowy_revision::disk::{RevisionChangeset, RevisionDiskCache, SyncRecord};
 use flowy_revision::{
     RevisionManager, RevisionMergeable, RevisionObjectDeserializer, RevisionPersistence,
-    RevisionPersistenceConfiguration, RevisionSnapshotDiskCache, RevisionSnapshotInfo,
-    REVISION_WRITE_INTERVAL_IN_MILLIS,
+    RevisionPersistenceConfiguration, RevisionSnapshot, RevisionSnapshotDiskCache, REVISION_WRITE_INTERVAL_IN_MILLIS,
 };
 
 use flowy_http_model::revision::{Revision, RevisionRange};
@@ -16,35 +15,14 @@ use std::sync::Arc;
 use std::time::Duration;
 
 pub enum RevisionScript {
-    AddLocalRevision {
-        content: String,
-        base_rev_id: i64,
-        rev_id: i64,
-    },
-    AddLocalRevision2 {
-        content: String,
-        pair_rev_id: (i64, i64),
-    },
-    AddInvalidLocalRevision {
-        bytes: Vec<u8>,
-        base_rev_id: i64,
-        rev_id: i64,
-    },
-    AckRevision {
-        rev_id: i64,
-    },
-    AssertNextSyncRevisionId {
-        rev_id: Option<i64>,
-    },
-    AssertNumberOfSyncRevisions {
-        num: usize,
-    },
-    AssertNumberOfRevisionsInDisk {
-        num: usize,
-    },
-    AssertNextSyncRevisionContent {
-        expected: String,
-    },
+    AddLocalRevision { content: String },
+    AddLocalRevision2 { content: String },
+    AddInvalidLocalRevision { bytes: Vec<u8> },
+    AckRevision { rev_id: i64 },
+    AssertNextSyncRevisionId { rev_id: Option<i64> },
+    AssertNumberOfSyncRevisions { num: usize },
+    AssertNumberOfRevisionsInDisk { num: usize },
+    AssertNextSyncRevisionContent { expected: String },
     WaitWhenWriteToDisk,
 }
 
@@ -66,7 +44,7 @@ impl RevisionTest {
         let configuration = RevisionPersistenceConfiguration::new(merge_threshold as usize, false);
         let disk_cache = RevisionDiskCacheMock::new(vec![]);
         let persistence = RevisionPersistence::new(&user_id, &object_id, disk_cache, configuration.clone());
-        let compress = RevisionCompressMock {};
+        let compress = RevisionMergeableMock {};
         let snapshot = RevisionSnapshotMock {};
         let mut rev_manager = RevisionManager::new(&user_id, &object_id, persistence, compress, snapshot);
         rev_manager.initialize::<RevisionObjectMockSerde>(None).await.unwrap();
@@ -89,7 +67,7 @@ impl RevisionTest {
             configuration.clone(),
         );
 
-        let compress = RevisionCompressMock {};
+        let compress = RevisionMergeableMock {};
         let snapshot = RevisionSnapshotMock {};
         let mut rev_manager =
             RevisionManager::new(&old_test.user_id, &old_test.object_id, persistence, compress, snapshot);
@@ -107,56 +85,32 @@ impl RevisionTest {
         }
     }
 
-    pub fn next_rev_id_pair(&self) -> (i64, i64) {
-        self.rev_manager.next_rev_id_pair()
-    }
-
     pub async fn run_script(&self, script: RevisionScript) {
         match script {
-            RevisionScript::AddLocalRevision {
-                content,
-                base_rev_id,
-                rev_id,
-            } => {
+            RevisionScript::AddLocalRevision { content } => {
                 let object = RevisionObjectMock::new(&content);
                 let bytes = object.to_bytes();
                 let md5 = md5(&bytes);
-                let revision = Revision::new(
-                    &self.rev_manager.object_id,
-                    base_rev_id,
-                    rev_id,
-                    Bytes::from(bytes),
-                    md5,
-                );
-                self.rev_manager.add_local_revision(&revision).await.unwrap();
+                self.rev_manager
+                    .add_local_revision(Bytes::from(bytes), md5)
+                    .await
+                    .unwrap();
             }
-            RevisionScript::AddLocalRevision2 { content, pair_rev_id } => {
+            RevisionScript::AddLocalRevision2 { content } => {
                 let object = RevisionObjectMock::new(&content);
                 let bytes = object.to_bytes();
                 let md5 = md5(&bytes);
-                let revision = Revision::new(
-                    &self.rev_manager.object_id,
-                    pair_rev_id.0,
-                    pair_rev_id.1,
-                    Bytes::from(bytes),
-                    md5,
-                );
-                self.rev_manager.add_local_revision(&revision).await.unwrap();
+                self.rev_manager
+                    .add_local_revision(Bytes::from(bytes), md5)
+                    .await
+                    .unwrap();
             }
-            RevisionScript::AddInvalidLocalRevision {
-                bytes,
-                base_rev_id,
-                rev_id,
-            } => {
+            RevisionScript::AddInvalidLocalRevision { bytes } => {
                 let md5 = md5(&bytes);
-                let revision = Revision::new(
-                    &self.rev_manager.object_id,
-                    base_rev_id,
-                    rev_id,
-                    Bytes::from(bytes),
-                    md5,
-                );
-                self.rev_manager.add_local_revision(&revision).await.unwrap();
+                self.rev_manager
+                    .add_local_revision(Bytes::from(bytes), md5)
+                    .await
+                    .unwrap();
             }
             RevisionScript::AckRevision { rev_id } => {
                 //
@@ -291,18 +245,22 @@ impl RevisionDiskCache<RevisionConnectionMock> for RevisionDiskCacheMock {
 pub struct RevisionConnectionMock {}
 pub struct RevisionSnapshotMock {}
 impl RevisionSnapshotDiskCache for RevisionSnapshotMock {
-    fn write_snapshot(&self, _object_id: &str, _rev_id: i64, _data: Vec<u8>) -> FlowyResult<()> {
+    fn write_snapshot(&self, _rev_id: i64, _data: Vec<u8>) -> FlowyResult<()> {
         todo!()
     }
 
-    fn read_snapshot(&self, _object_id: &str, _rev_id: i64) -> FlowyResult<RevisionSnapshotInfo> {
+    fn read_snapshot(&self, _rev_id: i64) -> FlowyResult<Option<RevisionSnapshot>> {
         todo!()
     }
+
+    fn read_last_snapshot(&self) -> FlowyResult<Option<RevisionSnapshot>> {
+        Ok(None)
+    }
 }
 
-pub struct RevisionCompressMock {}
+pub struct RevisionMergeableMock {}
 
-impl RevisionMergeable for RevisionCompressMock {
+impl RevisionMergeable for RevisionMergeableMock {
     fn combine_revisions(&self, revisions: Vec<Revision>) -> FlowyResult<Bytes> {
         let mut object = RevisionObjectMock::new("");
         for revision in revisions {

frontend/rust-lib/flowy-task/src/scheduler.rs

@@ -2,6 +2,7 @@ use crate::queue::TaskQueue;
 use crate::store::TaskStore;
 use crate::{Task, TaskContent, TaskId, TaskState};
 use anyhow::Error;
+use lib_infra::async_trait::async_trait;
 use lib_infra::future::BoxResultFuture;
 use lib_infra::ref_map::{RefCountHashMap, RefCountValue};
 use std::sync::Arc;
@@ -41,8 +42,8 @@ impl TaskDispatcher {
         self.handlers.insert(handler_id, RefCountTaskHandler(Arc::new(handler)));
     }
 
-    pub fn unregister_handler<T: AsRef<str>>(&mut self, handler_id: T) {
-        self.handlers.remove(handler_id.as_ref());
+    pub async fn unregister_handler<T: AsRef<str>>(&mut self, handler_id: T) {
+        self.handlers.remove(handler_id.as_ref()).await;
     }
 
     pub fn stop(&mut self) {
@@ -174,8 +175,9 @@ where
 #[derive(Clone)]
 struct RefCountTaskHandler(Arc<dyn TaskHandler>);
 
+#[async_trait]
 impl RefCountValue for RefCountTaskHandler {
-    fn did_remove(&self) {}
+    async fn did_remove(&self) {}
 }
 
 impl std::ops::Deref for RefCountTaskHandler {

frontend/rust-lib/flowy-task/tests/task_test/script.rs

@@ -2,6 +2,7 @@ use anyhow::Error;
 use flowy_task::{Task, TaskContent, TaskDispatcher, TaskHandler, TaskId, TaskResult, TaskRunner, TaskState};
 use futures::stream::FuturesUnordered;
 use futures::StreamExt;
+use lib_infra::async_trait::async_trait;
 use lib_infra::future::BoxResultFuture;
 use lib_infra::ref_map::RefCountValue;
 use rand::Rng;
@@ -83,7 +84,7 @@ impl SearchTest {
                 tokio::time::sleep(Duration::from_millis(millisecond)).await;
             }
             SearchScript::UnregisterHandler { handler_id } => {
-                self.scheduler.write().await.unregister_handler(handler_id);
+                self.scheduler.write().await.unregister_handler(handler_id).await;
             }
             SearchScript::AssertTaskStatus {
                 task_id,
@@ -109,8 +110,9 @@ impl SearchTest {
 }
 
 pub struct MockTextTaskHandler();
+#[async_trait]
 impl RefCountValue for MockTextTaskHandler {
-    fn did_remove(&self) {}
+    async fn did_remove(&self) {}
 }
 
 impl TaskHandler for MockTextTaskHandler {
@@ -146,8 +148,9 @@ pub fn make_text_user_interactive_task(task_id: TaskId, s: &str) -> (Task, Recei
 }
 
 pub struct MockBlobTaskHandler();
+#[async_trait]
 impl RefCountValue for MockBlobTaskHandler {
-    fn did_remove(&self) {}
+    async fn did_remove(&self) {}
 }
 
 impl TaskHandler for MockBlobTaskHandler {

frontend/rust-lib/lib-log/src/lib.rs

@@ -1,12 +1,9 @@
 mod layer;
-
-use log::LevelFilter;
-
-use tracing::subscriber::set_global_default;
-
 use crate::layer::*;
 use lazy_static::lazy_static;
+use log::LevelFilter;
 use std::sync::RwLock;
+use tracing::subscriber::set_global_default;
 use tracing_appender::{non_blocking::WorkerGuard, rolling::RollingFileAppender};
 use tracing_bunyan_formatter::JsonStorageLayer;
 use tracing_log::LogTracer;

shared-lib/Cargo.lock

@@ -38,6 +38,17 @@ dependencies = [
  "syn",
 ]
 
+[[package]]
+name = "async-trait"
+version = "0.1.59"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "31e6e93155431f3931513b243d371981bb2770112b370c82745a1d19d2f99364"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "atty"
 version = "0.2.14"
@@ -808,6 +819,7 @@ checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
 name = "lib-infra"
 version = "0.1.0"
 dependencies = [
+ "async-trait",
  "bytes",
  "chrono",
  "futures-core",
@@ -1283,11 +1295,11 @@ checksum = "bc881b2c22681370c6a780e47af9840ef841837bc98118431d4e1868bd0c1086"
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.32"
+version = "1.0.47"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ba508cc11742c0dc5c1659771673afbab7a0efab23aa17e854cbab0837ed0b43"
+checksum = "5ea3d908b0e36316caf9e9e2c4625cdde190a7e6f440d794667ed17a1855e725"
 dependencies = [
- "unicode-xid",
+ "unicode-ident",
 ]
 
 [[package]]
@@ -1679,13 +1691,13 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "1.0.81"
+version = "1.0.105"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f2afee18b8beb5a596ecb4a2dce128c719b4ba399d34126b9e4396e3f9860966"
+checksum = "60b9b43d45702de4c839cb9b51d9f529c5dd26a4aff255b42b1ebc03e88ee908"
 dependencies = [
  "proc-macro2",
  "quote",
- "unicode-xid",
+ "unicode-ident",
 ]
 
 [[package]]
@@ -1994,6 +2006,12 @@ version = "0.3.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1a01404663e3db436ed2746d9fefef640d868edae3cceb81c3b8d5732fda678f"
 
+[[package]]
+name = "unicode-ident"
+version = "1.0.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6ceab39d59e4c9499d4e5a8ee0e2735b891bb7308ac83dfb4e80cad195c9f6f3"
+
 [[package]]
 name = "unicode-normalization"
 version = "0.1.19"
@@ -2015,12 +2033,6 @@ version = "0.1.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3ed742d4ea2bd1176e236172c8429aaf54486e7ac098db29ffe6529e0ce50973"
 
-[[package]]
-name = "unicode-xid"
-version = "0.2.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8ccb82d61f80a663efe1f787a51b16b5a51e3314d6ac365b08639f52387b33f3"
-
 [[package]]
 name = "url"
 version = "2.2.2"

shared-lib/flowy-http-model/src/entities/revision.rs

@@ -36,7 +36,7 @@ impl Revision {
         let rev_id = rev_id;
 
         if base_rev_id != 0 {
-            debug_assert!(base_rev_id != rev_id);
+            debug_assert!(base_rev_id <= rev_id);
         }
 
         Self {

shared-lib/flowy-sync/src/client_grid/grid_revision_pad.rs

@@ -14,6 +14,7 @@ use std::sync::Arc;
 pub type GridOperations = DeltaOperations<EmptyAttributes>;
 pub type GridOperationsBuilder = DeltaOperationBuilder<EmptyAttributes>;
 
+#[derive(Clone)]
 pub struct GridRevisionPad {
     grid_rev: Arc<GridRevision>,
     operations: GridOperations,

shared-lib/flowy-sync/src/util.rs

@@ -35,7 +35,7 @@ pub fn contain_newline(s: &str) -> bool {
 #[tracing::instrument(level = "trace", skip(revisions), err)]
 pub fn make_operations_from_revisions<T>(revisions: Vec<Revision>) -> CollaborateResult<DeltaOperations<T>>
 where
-    T: OperationAttributes + DeserializeOwned,
+    T: OperationAttributes + DeserializeOwned + OperationAttributes + serde::Serialize,
 {
     let mut new_operations = DeltaOperations::<T>::new();
     for revision in revisions {
@@ -45,10 +45,30 @@ where
         }
 
         let operations = DeltaOperations::<T>::from_bytes(revision.bytes).map_err(|e| {
-            let err_msg = format!("Deserialize remote revision failed: {:?}", e);
+            let err_msg = format!("Deserialize revision failed: {:?}", e);
             CollaborateError::internal().context(err_msg)
         })?;
-        new_operations = new_operations.compose(&operations)?;
+
+        match new_operations.compose(&operations) {
+            Ok(composed_operations) => {
+                new_operations = composed_operations;
+                // if composed_operations.content().is_ok() {
+                //     new_operations = composed_operations;
+                // } else {
+                //     tracing::error!(
+                //         "Compose operation failed: rev_id: {}, object_id: {} {:?}",
+                //         revision.rev_id,
+                //         revision.object_id,
+                //         operations
+                //     );
+                //     return Ok(new_operations);
+                // }
+            }
+            Err(e) => {
+                tracing::error!("Compose operation failed: {},  {:?}", e, operations);
+                return Ok(new_operations);
+            }
+        }
     }
     Ok(new_operations)
 }

shared-lib/lib-infra/Cargo.toml

@@ -12,4 +12,4 @@ pin-project = "1.0"
 futures-core = { version = "0.3" }
 tokio = { version = "1.0", features = ["time", "rt"] }
 rand = "0.8.5"
-
+async-trait = "0.1.59"

shared-lib/lib-infra/src/future.rs

@@ -8,7 +8,7 @@ use std::{
     task::{Context, Poll},
 };
 
-pub fn to_future<T, O>(f: T) -> Fut<O>
+pub fn to_fut<T, O>(f: T) -> Fut<O>
 where
     T: Future<Output = O> + Send + Sync + 'static,
 {

shared-lib/lib-infra/src/lib.rs

@@ -2,3 +2,5 @@ pub mod future;
 pub mod ref_map;
 pub mod retry;
 pub mod util;
+
+pub use async_trait;

shared-lib/lib-infra/src/ref_map.rs

@@ -1,8 +1,10 @@
+use async_trait::async_trait;
 use std::collections::HashMap;
 use std::sync::Arc;
 
+#[async_trait]
 pub trait RefCountValue {
-    fn did_remove(&self) {}
+    async fn did_remove(&self) {}
 }
 
 struct RefCountHandler<T> {
@@ -30,7 +32,7 @@ impl<T> std::default::Default for RefCountHashMap<T> {
 
 impl<T> RefCountHashMap<T>
 where
-    T: Clone + Send + Sync + RefCountValue,
+    T: Clone + Send + Sync + RefCountValue + 'static,
 {
     pub fn new() -> Self {
         Self::default()
@@ -53,7 +55,7 @@ where
         }
     }
 
-    pub fn remove(&mut self, key: &str) {
+    pub async fn remove(&mut self, key: &str) {
         let mut should_remove = false;
         if let Some(value) = self.0.get_mut(key) {
             if value.ref_count > 0 {
@@ -64,17 +66,20 @@ where
 
         if should_remove {
             if let Some(handler) = self.0.remove(key) {
-                handler.inner.did_remove();
+                tokio::spawn(async move {
+                    handler.inner.did_remove().await;
+                });
             }
         }
     }
 }
 
+#[async_trait]
 impl<T> RefCountValue for Arc<T>
 where
-    T: RefCountValue,
+    T: RefCountValue + Sync + Send,
 {
-    fn did_remove(&self) {
-        (**self).did_remove()
+    async fn did_remove(&self) {
+        (**self).did_remove().await
     }
 }