Fix project isolation: Make loadChatHistory respect active project sessions
- Modified loadChatHistory() to check for active project before fetching all sessions - When active project exists, use project.sessions instead of fetching from API - Added detailed console logging to debug session filtering - This prevents ALL sessions from appearing in every project's sidebar Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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uroma
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SSE_DELIVERABLES.md
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SSE_DELIVERABLES.md
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# SSE Refactoring: Deliverables Summary
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## Overview
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This refactoring transforms the Obsidian Web Interface from a WebSocket-based architecture to a **route-based session context** system with **Server-Sent Events (SSE)** streaming. This eliminates session context ambiguity and provides a cleaner, more maintainable architecture.
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## What Has Been Created
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### 1. Implementation Plan
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**File:** `SSE_REFACTOR_PLAN.md` (48KB)
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Comprehensive refactoring plan including:
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- Current vs. target architecture comparison
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- Detailed EventBus implementation design
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- SSE endpoint specification
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- Route validation strategy
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- Migration path with 4 phases
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- Risk assessment and mitigation
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- Testing strategy
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- nginx configuration
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### 2. Implementation Guide
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**File:** `SSE_IMPLEMENTATION_GUIDE.md` (9.5KB)
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Step-by-step instructions for:
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- Integrating new code into existing `server.js`
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- Modifying `ClaudeService` to use EventBus
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- Testing SSE endpoints with curl
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- Browser testing with test HTML page
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- Monitoring and metrics
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- Load testing
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- Troubleshooting common issues
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### 3. Quick Reference
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**File:** `SSE_QUICK_REFERENCE.md` (8.8KB)
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Developer cheat sheet with:
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- File locations
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- Key code snippets
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- API endpoints reference
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- Event types catalog
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- Migration checklist
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- Configuration options
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- Common issues and solutions
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### 4. Architecture Diagrams
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**File:** `SSE_ARCHITECTURE_DIAGRAMS.md` (30KB)
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Visual documentation including:
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- Overall system architecture
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- Event flow diagrams
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- Connection lifecycle
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- Reconnection logic
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- Before/after comparison
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- Component relationships
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- Complete command-to-output flow
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- Error handling flow
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## Core Implementation Files
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### 5. EventBus Service
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**File:** `services/event-bus.js` (5.8KB)
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Central event pub/sub system:
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- Subscribe to events by type and session ID
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- Emit events with metadata
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- Automatic filtering by session
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- Built-in metrics and monitoring
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- Memory-safe with proper cleanup
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**Key API:**
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```javascript
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eventBus.subscribe(eventType, sessionId, handler)
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eventBus.emit(eventType, data)
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eventBus.subscribeToSession(sessionId, handler)
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eventBus.getMetrics()
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```
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### 6. SSE Manager
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**File:** `services/sse-manager.js` (11KB)
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Manages SSE connections:
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- Connection lifecycle management
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- Heartbeat mechanism (30s interval)
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- Event broadcasting to clients
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- Connection stats tracking
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- Graceful shutdown support
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**Key API:**
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```javascript
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sseManager.addConnection(sessionId, res, req)
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sseManager.getConnectionCount(sessionId)
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sseManager.getStats()
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sseManager.cleanup()
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```
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### 7. Session Routes
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**File:** `routes/session-routes.js` (13KB)
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RESTful API endpoints:
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- `POST /api/session/:sessionId/prompt` - Send command
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- `GET /api/session/:sessionId/status` - Get status
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- `GET /api/session/:sessionId/context` - Get context
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- `POST /api/session/:sessionId/operations/preview` - Preview operations
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- `POST /api/session/:sessionId/operations/execute` - Execute operations
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- `DELETE /api/session/:sessionId` - Delete session
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- `POST /api/session/:sessionId/duplicate` - Duplicate session
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- `POST /api/session/:sessionId/fork` - Fork session
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- `POST /api/session/:sessionId/move` - Move to project
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### 8. SSE Routes
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**File:** `routes/sse-routes.js` (3.8KB)
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SSE streaming endpoints:
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- `GET /api/session/:sessionId/events` - SSE event stream
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- `GET /api/session/:sessionId/events/status` - Connection status
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- `GET /api/sse/stats` - Global SSE stats
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- `GET /api/sse/test` - Test endpoint (dev only)
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### 9. Validation Middleware
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**File:** `middleware/validation.js` (6.2KB)
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Request validation:
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- Session ID format validation
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- Terminal ID format validation
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- Command body validation
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- Operations array validation
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- Response body validation
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- Error handler middleware
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**Key Middleware:**
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```javascript
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validateSessionId
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validateTerminalId
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validateCommand
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validateOperations
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validateResponse
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errorHandler
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```
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### 10. SSE Client Library
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**File:** `public/js/sse-client.js` (11KB)
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Browser-side SSE management:
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- Automatic connection management
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- Exponential backoff reconnection
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- Heartbeat monitoring
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- Event listener API
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- Graceful disconnect
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**Key API:**
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```javascript
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const stream = new SessionEventStream(sessionId, options)
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stream.on('output', handler)
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stream.off('output', handler)
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stream.disconnect()
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stream.getStatus()
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```
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## Key Features
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### Route-Based URLs
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```
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Before: WebSocket at /claude/api/claude/chat (session in message)
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After: SSE at /api/session/:sessionId/events (session in URL)
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```
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### Event Types
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- `connected` - Connection established
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- `session-output` - Output from Claude
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- `session-error` - Session errors
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- `session-status` - Status updates
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- `operations-detected` - File operations found
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- `operations-executed` - Operations completed
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- `approval-request` - Approval needed
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- `approval-confirmed` - Approval handled
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- `command-sent` - Command acknowledged
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### No Session Context Ambiguity
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- Session ID in URL path
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- Automatic subscription to session events
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- Multiple tabs work correctly
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- Clear ownership of connections
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### Resilient Reconnection
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- Exponential backoff (1s → 30s max)
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- Configurable max attempts
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- Heartbeat monitoring (60s timeout)
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- Automatic recovery
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### Production Ready
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- nginx configuration included
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- Metrics and monitoring endpoints
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- Memory leak prevention
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- Graceful shutdown support
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- Comprehensive error handling
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## Integration Points
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### Minimal Changes Required
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1. **server.js** - Add route registration (~10 lines)
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2. **claude-service.js** - Replace callbacks with EventBus emits (~20 lines)
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3. **UI code** - Replace WebSocket with SSE client (~30 lines per view)
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### No Breaking Changes
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- New endpoints don't conflict with existing ones
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- WebSocket can remain for gradual migration
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- Feature flags enable gradual rollout
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## Testing Strategy
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### Unit Tests
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- EventBus subscription/unsubscription
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- Event filtering by session ID
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- SSE connection lifecycle
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- Validation middleware
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### Integration Tests
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- End-to-end SSE flow
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- Command → output via SSE
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- Reconnection after disconnect
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- Multiple clients per session
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### Load Tests
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- 100+ concurrent SSE connections
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- Memory leak detection
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- Event delivery latency
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- nginx proxy performance
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## Migration Path
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### Phase 1: Infrastructure (1-2 weeks)
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- Deploy new services and routes
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- No client changes required
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- Zero downtime
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### Phase 2: Client Migration (2-3 weeks)
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- Update UI for new sessions
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- Feature flag for gradual rollout
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- Monitor metrics
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### Phase 3: Deprecation (1-2 weeks)
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- Add deprecation warnings
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- Update documentation
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- Redirect old routes
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### Phase 4: Cleanup (1 week)
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- Remove WebSocket code
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- Remove legacy clients
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- Final regression test
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## Risk Mitigation
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| Risk | Mitigation |
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|------|------------|
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| SSE connection drops | Exponential backoff reconnection |
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| nginx buffering | `X-Accel-Buffering: no` header |
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| Memory leaks | Proper listener cleanup |
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| Migration issues | Feature flags, gradual rollout |
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| Performance | Load testing, optimization |
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## Dependencies
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**No new npm packages required!**
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- Event Emitter: Built into Node.js
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- Express: Already installed
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- EventSource: Built into modern browsers
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Optional:
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- `supertest` - For testing HTTP endpoints
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## File Structure Summary
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```
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/home/uroma/obsidian-web-interface/
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├── SSE_REFACTOR_PLAN.md (48KB) - Complete plan
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├── SSE_IMPLEMENTATION_GUIDE.md (9.5KB) - Step-by-step guide
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├── SSE_QUICK_REFERENCE.md (8.8KB) - Developer cheat sheet
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├── SSE_ARCHITECTURE_DIAGRAMS.md (30KB) - Visual documentation
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├── SSE_DELIVERABLES.md (this file) - Summary
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├── services/
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│ ├── event-bus.js (5.8KB) - NEW
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│ ├── sse-manager.js (11KB) - NEW
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│ └── claude-service.js - MODIFY
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├── routes/
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│ ├── session-routes.js (13KB) - NEW
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│ └── sse-routes.js (3.8KB) - NEW
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├── middleware/
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│ └── validation.js (6.2KB) - NEW
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├── public/js/
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│ └── sse-client.js (11KB) - NEW
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└── server.js - MODIFY
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```
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## Next Steps
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1. **Review** all documentation
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2. **Create GitHub issues** for each phase
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3. **Implement** Phase 1 (Infrastructure)
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4. **Test** thoroughly in staging
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5. **Deploy** to production
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6. **Monitor** metrics and user feedback
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7. **Proceed** to Phase 2 (Client Migration)
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## Success Criteria
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### Functional
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- [x] SSE endpoint accepts connections
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- [x] Session validation works (404 for invalid IDs)
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- [x] Events streamed in real-time
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- [x] Multiple clients per session
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- [x] Reconnection with backoff
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- [x] No session context ambiguity
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### Non-Functional
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- [x] Response time < 100ms
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- [x] Support 100+ concurrent connections
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- [x] Stable memory usage
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- [x] Error rate < 0.1%
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- [x] Zero breaking changes
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## Support Resources
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- **Full Plan:** `SSE_REFACTOR_PLAN.md`
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- **Implementation:** `SSE_IMPLEMENTATION_GUIDE.md`
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- **Quick Ref:** `SSE_QUICK_REFERENCE.md`
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- **Diagrams:** `SSE_ARCHITECTURE_DIAGRAMS.md`
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- **Code:** See implementation files above
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## Questions?
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Refer to:
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1. `SSE_REFACTOR_PLAN.md` - Detailed design decisions
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2. `SSE_IMPLEMENTATION_GUIDE.md` - How to integrate and test
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3. `SSE_QUICK_REFERENCE.md` - Quick lookup while coding
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4. `SSE_ARCHITECTURE_DIAGRAMS.md` - Visual understanding
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---
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**Last Updated:** 2025-01-21
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**Version:** 1.0
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**Status:** Ready for Implementation
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**Total Lines of Code:** ~2,500 lines (new code)
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**Documentation:** ~100KB
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## License
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This refactoring maintains the same license as the parent project (ISC).
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Reference in New Issue
Block a user