15. High-Speed Local Persistence: Hive, Isar & Type-Safe SQLite with Drift (Moor) • Flutter & Dart Mobile Systems Architecture • Rishabh Ki Kaksha

Flutter & Dart Mobile Systems Architecture › 15. High-Speed Local Persistence: Hive, Isar & Type-Safe SQLite with Drift (Moor)

45 mins

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Course Syllabus

Module 1: Dart 3+ Language Internals, Sound Null Safety & Concurrency (Isolates)

01. Dart 3+ Evolution: Sound Null Safety, Records, Pattern Matching & Sealed Classes 02. Dart Concurrency: Event Loops, Microtask Queue, Futures, Streams & Isolates (Spawn/Compute) 03. Dart Memory Management: Generational Garbage Collection & Object Pool Allocation

Part 1: Dart Mastery & Widget Tree Engine

Module 2: Flutter Rendering Pipeline: 3 Trees Architecture & Impeller Engine

04. Flutter Rendering Architecture: The 3 Trees (Widget Tree, Element Tree & RenderObject Tree) 05. The Impeller Rendering Engine: Vulkan/Metal Pre-compiled Shaders & Zero Junk Architecture 06. Custom RenderObjects & CustomPainter: Building High-Performance 60FPS Charts & UI Effects

Part 2: Platform Channels, Canvas & App Deployment

Module 3: Advanced State Management: Bloc, Cubit, Riverpod 2 & Signals

07. State Management Overview: Ephemeral vs App State & InheritedWidget Internals 08. BLoC (Business Logic Component) & Cubit Architecture with Reactive Streams 09. Riverpod 2.0 Masterclass: Auto-Dispose, Family Providers & Code Generation (riverpod_generator)

Module 4: Declarative Routing, Deep Linking with GoRouter & Micro-Apps

10. Declarative Navigation with GoRouter: URL-based Routing, Nested ShellRoutes & Redirect Guards 11. Deep Linking Architecture on Android & iOS with GoRouter Integration 12. Micro-App Architecture & Modularization in Enterprise Flutter Codebases

Module 5: Native Platform Channels, FFI (Foreign Function Interface) & SQLite (Drift)

13. Platform Channels: MethodChannel, EventChannel & BasicMessageChannel for Swift/Kotlin Interop 14. Dart FFI (Foreign Function Interface): Calling High-Performance C/C++ & Rust Native Libraries 15. High-Speed Local Persistence: Hive, Isar & Type-Safe SQLite with Drift (Moor)

Module 6: Flutter Clean Architecture, Testing & Multi-Platform Deployment (iOS, Android, Web)

16. Enterprise Clean Architecture: Domain, Data & Presentation Layers Separation 17. Network Resilience Layer: Dio Interceptors, Refresh Token Auto-Retry & Offline Cache Interceptor 18. Comprehensive Testing Suite: Unit Tests, Widget Tests & Integration Tests with Mockito/Mocktail 19. Flutter Web & Desktop Optimization: Responsive Layouts, Wasm Compilation & SEO Strategies 20. Automated CI/CD Pipelines with GitHub Actions, Fastlane & Codemagic for App Store Distribution

Interactive Lesson Studio

# 15. High-Speed Local Persistence: Hive, Isar & Type-Safe SQLite with Drift (Moor)

> Flutter & Dart Notes by Rishabh - Topic 15

---

### 1. The Mobile Database Spectrum 🗄️

1. **SharedPreferences:** Small key-values (Theme, simple flags).
2. **Hive / Isar (Pure Dart NoSQL Engine):** In-memory binary storage. Ultra fast for offline document caching.
3. **Drift (Type-Safe SQLite ORM):** Complex relational queries, foreign keys, migrations, and reactive Stream queries.

---

### 2. Reactive Drift SQLite Database

```dart
import 'package:drift/drift.dart';
part 'app_database.g.dart';

class Lessons extends Table {
    TextColumn get id => text()();
    TextColumn get title => text()();
    TextColumn get contentMarkdown => text()();
    BoolColumn get isCompleted => boolean().withDefault(const Constant(false))();

@override
    Set<Column> get primaryKey => {id};
}

@DriftDatabase(tables: [Lessons])
class AppDatabase extends _$AppDatabase {
    AppDatabase(QueryExecutor e) : super(e);
    @override
    int get schemaVersion => 1;

// Reactive auto-updating Stream query:
    Stream<List<Lesson>> watchAllLessons() => select(lessons).watch();
}
```

---

### 3. Master Comparison Matrix

---

### 4. Interview Ke 3 Sawal Is Topic Se

1. **Drift database migrations live production app me kaise handle hoti hain?** -> `MigrationStrategy` me `onUpgrade(m, from, to)` block me `m.addColumn()` ya `m.createTable()` step-by-step execute karke.
2. **SQLCipher SQLite database ko kaise encrypt karta hai?** -> Poore database file ko disk par 256-bit AES encryption se encrypt karta hai.
3. **Hive Box lazy loading kya hoti hai?** -> `Hive.openLazyBox()` sirf keys ko RAM me load karta hai aur values ko tabhi disk se fetch karta hai jab specific record access ho.

---
**Next Topic:** 16. Enterprise Clean Architecture: Domain, Data & Presentation Layers Separation

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Rishabh Gehlot

PHP 8+ & Laravel 11 Master Track