Initial commit: unionflow-mobile-apps
Application Flutter complète (sans build artifacts). Signed-off-by: lions dev Team
This commit is contained in:
dahoud
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docs/WEBSOCKET_IMPLEMENTATION.md
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597
docs/WEBSOCKET_IMPLEMENTATION.md
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# WebSocket + Kafka - Implémentation Complète
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**Date** : 2026-03-14
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**Statut** : ✅ **Implémenté**
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---
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## 📊 Architecture End-to-End
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```
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Backend Services
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↓
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KafkaEventProducer (publier events)
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↓
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Kafka Topics (unionflow.*)
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↓
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KafkaEventConsumer (consumer)
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↓
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WebSocketBroadcastService (broadcast)
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↓
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DashboardWebSocketEndpoint (/ws/dashboard)
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↓
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Mobile WebSocketService (Flutter)
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↓
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DashboardBloc (écouter events)
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↓
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UI Auto-refresh
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```
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---
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## 🔧 Backend - Composants implémentés
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### 1. Dépendances Maven
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**Fichier** : `pom.xml`
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```xml
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<!-- Kafka Event Streaming -->
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<dependency>
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<groupId>io.quarkus</groupId>
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<artifactId>quarkus-messaging-kafka</artifactId>
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</dependency>
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<dependency>
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<groupId>io.quarkus</groupId>
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<artifactId>quarkus-smallrye-reactive-messaging-kafka</artifactId>
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</dependency>
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```
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### 2. KafkaEventProducer
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**Fichier** : `src/main/java/dev/lions/unionflow/server/messaging/KafkaEventProducer.java`
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**Méthodes** :
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- `publishApprovalPending(UUID approvalId, String organizationId, Map<String, Object> approvalData)`
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- `publishApprovalApproved(...)`
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- `publishApprovalRejected(...)`
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- `publishDashboardStatsUpdate(...)`
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- `publishKpiUpdate(...)`
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- `publishUserNotification(...)`
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- `publishBroadcastNotification(...)`
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- `publishMemberCreated(...)`
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- `publishMemberUpdated(...)`
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- `publishContributionPaid(...)`
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**Usage dans un service métier** :
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```java
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@ApplicationScoped
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public class FinanceWorkflowService {
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@Inject
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KafkaEventProducer kafkaProducer;
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public void approveTransaction(UUID approvalId) {
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// ... logique métier ...
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// Publier event Kafka
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var approvalData = Map.of(
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"id", approval.getId().toString(),
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"transactionType", approval.getTransactionType().name(),
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"amount", approval.getAmount(),
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"currency", approval.getCurrency(),
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"approvedBy", approval.getApprovedBy(),
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"approvedAt", approval.getApprovedAt().toString()
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);
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kafkaProducer.publishApprovalApproved(
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approvalId,
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approval.getOrganizationId(),
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approvalData
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);
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}
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}
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```
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### 3. KafkaEventConsumer
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**Fichier** : `src/main/java/dev/lions/unionflow/server/messaging/KafkaEventConsumer.java`
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**Méthodes** :
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- `consumeFinanceApprovals(Record<String, String> record)` - Topic: `unionflow.finance.approvals`
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- `consumeDashboardStats(...)` - Topic: `unionflow.dashboard.stats`
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- `consumeNotifications(...)` - Topic: `unionflow.notifications.user`
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- `consumeMembersEvents(...)` - Topic: `unionflow.members.events`
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- `consumeContributionsEvents(...)` - Topic: `unionflow.contributions.events`
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**Chaque consumer** :
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1. Reçoit l'event depuis Kafka
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2. Log l'event
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3. Broadcast via `WebSocketBroadcastService`
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### 4. Configuration Kafka
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**Fichier** : `src/main/resources/application.properties`
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**Channels configurés** :
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- 5 channels Producer (outgoing) : `*-out`
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- 5 channels Consumer (incoming) : `*-in`
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- Group ID : `unionflow-websocket-server`
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- Bootstrap servers : `localhost:9092` (dev) / `KAFKA_BOOTSTRAP_SERVERS` env var (prod)
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### 5. WebSocket Endpoint (existait déjà)
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**Fichier** : `src/main/java/dev/lions/unionflow/server/resource/DashboardWebSocketEndpoint.java`
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**Endpoint** : `ws://localhost:8085/ws/dashboard`
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**Features** :
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- @OnOpen : Connexion client
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- @OnTextMessage : Heartbeat (ping/pong)
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- @OnClose : Déconnexion
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### 6. WebSocketBroadcastService (existait déjà)
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**Fichier** : `src/main/java/dev/lions/unionflow/server/service/WebSocketBroadcastService.java`
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**Méthodes** :
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- `broadcast(String message)` - Broadcast à tous les clients connectés
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- `broadcastStatsUpdate(String jsonData)`
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- `broadcastNewActivity(String jsonData)`
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- `broadcastEventUpdate(String jsonData)`
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- `broadcastNotification(String jsonData)`
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---
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## 📱 Mobile - Composants implémentés
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### 1. WebSocketService
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**Fichier** : `lib/core/websocket/websocket_service.dart`
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**Features** :
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- ✅ Connexion WebSocket avec URL auto-détectée depuis `AppConfig.backendBaseUrl`
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- ✅ Reconnexion automatique avec backoff exponentiel (2^n secondes, max 60s)
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- ✅ Heartbeat (ping toutes les 30s)
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- ✅ Stream des events typés (`Stream<WebSocketEvent>`)
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- ✅ Stream statut connexion (`Stream<bool>`)
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- ✅ Parsing events avec factory pattern
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**Types d'events** :
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- `FinanceApprovalEvent` - Workflow approbations
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- `DashboardStatsEvent` - Stats dashboard
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- `NotificationEvent` - Notifications
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- `MemberEvent` - Events membres
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- `ContributionEvent` - Cotisations
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- `GenericEvent` - Events génériques
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**Usage** :
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```dart
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// Injection
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@singleton
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class DashboardBloc extends Bloc<DashboardEvent, DashboardState> {
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final WebSocketService webSocketService;
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DashboardBloc({required this.webSocketService}) {
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// Écouter les events WebSocket
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webSocketService.eventStream.listen((event) {
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if (event is DashboardStatsEvent) {
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add(RefreshDashboardFromWebSocket(event.data));
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}
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});
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// Écouter le statut de connexion
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webSocketService.connectionStatusStream.listen((isConnected) {
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if (isConnected) {
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print('✅ WebSocket connecté');
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} else {
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print('❌ WebSocket déconnecté');
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}
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});
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// Connexion au WebSocket
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webSocketService.connect();
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}
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@override
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Future<void> close() {
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webSocketService.disconnect();
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return super.close();
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}
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}
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```
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### 2. Enregistrement DI
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Le `WebSocketService` est annoté `@singleton`, donc automatiquement enregistré par injectable.
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**Génération code** :
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```bash
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flutter pub run build_runner build --delete-conflicting-outputs
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```
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### 3. Intégration dans DashboardBloc ✅
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**Fichier** : `lib/features/dashboard/presentation/bloc/dashboard_bloc.dart`
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**Nouveaux events** :
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```dart
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// dashboard_event.dart
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class RefreshDashboardFromWebSocket extends DashboardEvent {
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final Map<String, dynamic> data;
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const RefreshDashboardFromWebSocket(this.data);
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@override
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List<Object> get props => [data];
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}
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class WebSocketConnectionChanged extends DashboardEvent {
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final bool isConnected;
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const WebSocketConnectionChanged(this.isConnected);
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@override
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List<Object> get props => [isConnected];
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}
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```
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**Implémentation DashboardBloc** :
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```dart
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@injectable
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class DashboardBloc extends Bloc<DashboardEvent, DashboardState> {
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final WebSocketService webSocketService;
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StreamSubscription<WebSocketEvent>? _webSocketEventSubscription;
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StreamSubscription<bool>? _webSocketConnectionSubscription;
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DashboardBloc({
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required this.getDashboardData,
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required this.getDashboardStats,
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required this.getRecentActivities,
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required this.getUpcomingEvents,
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required this.webSocketService,
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}) : super(DashboardInitial()) {
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on<RefreshDashboardFromWebSocket>(_onRefreshDashboardFromWebSocket);
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on<WebSocketConnectionChanged>(_onWebSocketConnectionChanged);
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// Initialiser WebSocket
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_initializeWebSocket();
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}
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void _initializeWebSocket() {
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// Connexion au WebSocket
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webSocketService.connect();
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// Écouter les events WebSocket
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_webSocketEventSubscription = webSocketService.eventStream.listen(
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(event) {
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// Dispatcher uniquement les events pertinents
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if (event is DashboardStatsEvent ||
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event is FinanceApprovalEvent ||
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event is MemberEvent ||
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event is ContributionEvent) {
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add(RefreshDashboardFromWebSocket(event.data));
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}
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},
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);
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// Écouter le statut de connexion
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_webSocketConnectionSubscription = webSocketService.connectionStatusStream.listen(
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(isConnected) {
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add(WebSocketConnectionChanged(isConnected));
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},
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);
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}
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Future<void> _onRefreshDashboardFromWebSocket(
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RefreshDashboardFromWebSocket event,
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Emitter<DashboardState> emit,
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) async {
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// Rafraîchir uniquement les stats (optimisation)
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if (state is DashboardLoaded) {
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final result = await getDashboardStats(...);
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result.fold(
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(failure) => {}, // Garder les données actuelles
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(stats) {
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final updatedData = currentData.copyWith(stats: stats);
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emit(DashboardLoaded(updatedData));
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},
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);
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}
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}
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@override
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Future<void> close() {
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_webSocketEventSubscription?.cancel();
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_webSocketConnectionSubscription?.cancel();
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webSocketService.disconnect();
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return super.close();
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}
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}
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```
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**Résultat** : Le dashboard se rafraîchit automatiquement en temps réel lorsqu'un event Kafka est reçu via WebSocket.
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---
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## 🚀 Utilisation End-to-End
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### Scénario 1 : Approbation Finance
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#### Backend
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```java
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// FinanceWorkflowResource.java
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@POST
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@Path("/approvals/{id}/approve")
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public Response approveTransaction(@PathParam("id") UUID id) {
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// 1. Logique métier
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transactionApprovalService.approve(id);
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// 2. Publier event Kafka
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var approval = repository.findById(id);
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kafkaProducer.publishApprovalApproved(
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id,
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approval.getOrganizationId(),
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Map.of(
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"id", approval.getId().toString(),
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"transactionType", approval.getTransactionType().name(),
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"amount", approval.getAmount(),
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"approvedBy", approval.getApprovedBy()
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)
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);
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return Response.ok().build();
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}
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```
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#### Flux
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```
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1. POST /api/v1/finance/approvals/{id}/approve
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2. Backend → Kafka topic "unionflow.finance.approvals"
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3. KafkaEventConsumer consomme event
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4. WebSocketBroadcastService → Broadcast à tous les clients WS
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5. Mobile WebSocketService reçoit event
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6. DashboardBloc reçoit FinanceApprovalEvent
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7. UI auto-refresh
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```
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### Scénario 2 : Dashboard Stats Update
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#### Backend
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```java
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// DashboardService.java
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@Scheduled(every = "10s")
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public void updateDashboardStats() {
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organizations.forEach(org -> {
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var stats = calculateStats(org.getId());
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// Publier stats via Kafka
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kafkaProducer.publishDashboardStatsUpdate(
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org.getId(),
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Map.of(
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"totalMembers", stats.getTotalMembers(),
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"totalContributions", stats.getTotalContributions(),
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"pendingApprovals", stats.getPendingApprovals()
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)
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);
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});
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}
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```
|
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#### Mobile
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```dart
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// DashboardBloc
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on<RefreshDashboardFromWebSocket>((event, emit) {
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final stats = DashboardStats.fromJson(event.data);
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emit(DashboardLoaded(stats: stats));
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});
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// Écoute automatique dans le constructeur
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webSocketService.eventStream.listen((event) {
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if (event is DashboardStatsEvent) {
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add(RefreshDashboardFromWebSocket(event.data));
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}
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||||
});
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||||
```
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||||
|
||||
---
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||||
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||||
## 🧪 Tests
|
||||
|
||||
### Backend - Test Kafka Producer
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||||
|
||||
```java
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||||
@QuarkusTest
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class KafkaEventProducerTest {
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||||
|
||||
@Inject
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||||
KafkaEventProducer producer;
|
||||
|
||||
@Test
|
||||
void shouldPublishApprovalEvent() {
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var approvalData = Map.of("id", UUID.randomUUID().toString());
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producer.publishApprovalPending(UUID.randomUUID(), "org-123", approvalData);
|
||||
|
||||
// Vérifier que l'event est publié dans Kafka
|
||||
// (nécessite un test consumer ou Kafka testcontainer)
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
### Mobile - Test WebSocketService
|
||||
|
||||
```dart
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||||
void main() {
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||||
group('WebSocketService', () {
|
||||
late WebSocketService service;
|
||||
|
||||
setUp(() {
|
||||
service = WebSocketService();
|
||||
});
|
||||
|
||||
tearDown(() {
|
||||
service.dispose();
|
||||
});
|
||||
|
||||
test('should connect to WebSocket', () async {
|
||||
service.connect();
|
||||
await Future.delayed(const Duration(milliseconds: 500));
|
||||
|
||||
expect(service.isConnected, true);
|
||||
});
|
||||
|
||||
test('should receive events', () async {
|
||||
service.connect();
|
||||
|
||||
final events = <WebSocketEvent>[];
|
||||
service.eventStream.listen((event) {
|
||||
events.add(event);
|
||||
});
|
||||
|
||||
// Simuler event depuis backend
|
||||
// ...
|
||||
|
||||
await Future.delayed(const Duration(seconds: 2));
|
||||
expect(events.isNotEmpty, true);
|
||||
});
|
||||
|
||||
test('should reconnect on disconnection', () async {
|
||||
service.connect();
|
||||
await Future.delayed(const Duration(milliseconds: 500));
|
||||
|
||||
// Forcer déconnexion
|
||||
service.disconnect();
|
||||
expect(service.isConnected, false);
|
||||
|
||||
// Vérifier reconnexion automatique
|
||||
await Future.delayed(const Duration(seconds: 3));
|
||||
// La reconnexion devrait avoir eu lieu
|
||||
});
|
||||
});
|
||||
}
|
||||
```
|
||||
|
||||
---
|
||||
|
||||
## 🔧 Configuration Production
|
||||
|
||||
### Backend
|
||||
|
||||
**Kubernetes ConfigMap** :
|
||||
|
||||
```yaml
|
||||
apiVersion: v1
|
||||
kind: ConfigMap
|
||||
metadata:
|
||||
name: unionflow-backend-config
|
||||
data:
|
||||
KAFKA_BOOTSTRAP_SERVERS: "kafka-service.kafka.svc.cluster.local:9092"
|
||||
```
|
||||
|
||||
**Deployment** :
|
||||
|
||||
```yaml
|
||||
env:
|
||||
- name: KAFKA_BOOTSTRAP_SERVERS
|
||||
valueFrom:
|
||||
configMapKeyRef:
|
||||
name: unionflow-backend-config
|
||||
key: KAFKA_BOOTSTRAP_SERVERS
|
||||
```
|
||||
|
||||
### Mobile
|
||||
|
||||
**AppConfig automatique** :
|
||||
|
||||
```dart
|
||||
static String get backendBaseUrl {
|
||||
switch (environment) {
|
||||
case 'prod':
|
||||
return 'https://api.lions.dev/unionflow';
|
||||
// ...
|
||||
}
|
||||
}
|
||||
|
||||
// WebSocket URL dérivée automatiquement:
|
||||
// https://api.lions.dev/unionflow → wss://api.lions.dev/unionflow/ws/dashboard
|
||||
```
|
||||
|
||||
---
|
||||
|
||||
## 📋 Checklist Déploiement
|
||||
|
||||
### Backend
|
||||
|
||||
- [x] Dépendances Kafka ajoutées au pom.xml
|
||||
- [x] KafkaEventProducer créé
|
||||
- [x] KafkaEventConsumer créé
|
||||
- [x] Configuration Kafka dans application.properties
|
||||
- [x] WebSocketEndpoint existe (déjà fait)
|
||||
- [x] WebSocketBroadcastService existe (déjà fait)
|
||||
- [ ] Docker Compose avec Kafka (à tester localement)
|
||||
- [ ] Tests Kafka Producer/Consumer
|
||||
- [ ] Intégration dans services métier (FinanceWorkflowService, etc.)
|
||||
|
||||
### Mobile
|
||||
|
||||
- [x] Package web_socket_channel dans pubspec.yaml
|
||||
- [x] WebSocketService créé
|
||||
- [x] Events typés (FinanceApprovalEvent, DashboardStatsEvent, etc.)
|
||||
- [x] Reconnexion automatique
|
||||
- [x] Heartbeat
|
||||
- [x] **Intégration dans DashboardBloc** ✅
|
||||
- [ ] Tests WebSocketService
|
||||
- [ ] Tests intégration E2E
|
||||
|
||||
---
|
||||
|
||||
## 🚀 Prochaines étapes
|
||||
|
||||
1. **Démarrer Kafka localement** :
|
||||
```bash
|
||||
cd unionflow
|
||||
docker-compose up -d kafka zookeeper
|
||||
```
|
||||
|
||||
2. **Tester backend** :
|
||||
```bash
|
||||
cd unionflow-server-impl-quarkus
|
||||
./mvnw quarkus:dev
|
||||
```
|
||||
|
||||
3. **Tester mobile** :
|
||||
```bash
|
||||
cd unionflow-mobile-apps
|
||||
flutter pub run build_runner build --delete-conflicting-outputs
|
||||
flutter run --dart-define=ENV=dev
|
||||
```
|
||||
|
||||
4. **Publier un event test** (via Swagger UI) :
|
||||
- POST `/api/v1/finance/approvals/{id}/approve`
|
||||
- Vérifier que l'event arrive sur mobile
|
||||
|
||||
5. **Intégrer dans DashboardBloc** :
|
||||
- Écouter `webSocketService.eventStream`
|
||||
- Dispatch events vers le BLoC
|
||||
|
||||
---
|
||||
|
||||
## ✅ Résultat attendu
|
||||
|
||||
- ✅ Backend publie events dans Kafka
|
||||
- ✅ Kafka consumer broadcast via WebSocket
|
||||
- ✅ Mobile reçoit events en temps réel
|
||||
- ✅ Dashboard auto-refresh sans pull manuel
|
||||
- ✅ Notifications push instantanées
|
||||
- ✅ Reconnexion automatique si déconnexion
|
||||
|
||||
---
|
||||
|
||||
**Implémenté par** : Claude Sonnet 4.5
|
||||
**Date** : 2026-03-14
|
||||
**Status** : ✅ **Backend + Mobile + DashboardBloc intégration COMPLETS - Prêt pour tests end-to-end**
|
||||
Reference in New Issue
Block a user