303 lines
6.8 KiB
Markdown
303 lines
6.8 KiB
Markdown
# Unified Refresh System - Implementation Summary
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## ✅ What Has Been Created
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### Core Infrastructure Files
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1. **`lib/constants/refresh-intervals.ts`**
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- Standardized refresh intervals for all resources
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- Helper functions for interval management
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- All intervals harmonized and documented
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2. **`lib/utils/request-deduplication.ts`**
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- Request deduplication utility
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- Prevents duplicate API calls within 5 seconds
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- Automatic cleanup of stale requests
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3. **`lib/services/refresh-manager.ts`**
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- Centralized refresh management
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- Handles all refresh intervals
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- Provides pause/resume functionality
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- Prevents duplicate refreshes
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4. **`hooks/use-unified-refresh.ts`**
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- React hook for easy integration
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- Automatic registration/cleanup
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- Manual refresh support
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### Documentation Files
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1. **`IMPLEMENTATION_PLAN_UNIFIED_REFRESH.md`**
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- Complete architecture overview
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- Detailed implementation guide
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- Code examples for all widgets
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2. **`IMPLEMENTATION_CHECKLIST.md`**
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- Step-by-step checklist
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- Daily progress tracking
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- Success criteria
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---
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## 🎯 Next Steps
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### Immediate Actions (Start Here)
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#### 1. Fix Critical Memory Leaks (30 minutes)
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**File**: `lib/services/notifications/notification-service.ts`
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Replace `redis.keys()` with `redis.scan()`:
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```typescript
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// Line 293 - BEFORE
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const listKeys = await redis.keys(listKeysPattern);
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// AFTER
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const listKeys: string[] = [];
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let cursor = '0';
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do {
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const [nextCursor, keys] = await redis.scan(
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cursor,
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'MATCH',
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listKeysPattern,
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'COUNT',
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100
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);
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cursor = nextCursor;
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if (keys.length > 0) {
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listKeys.push(...keys);
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}
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} while (cursor !== '0');
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```
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---
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#### 2. Test Core Infrastructure (1 hour)
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Create a test file to verify everything works:
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**File**: `lib/services/__tests__/refresh-manager.test.ts` (optional)
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Or test manually:
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1. Import refresh manager in a component
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2. Register a test resource
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3. Verify it refreshes at correct interval
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4. Verify cleanup on unmount
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---
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#### 3. Refactor Notifications (2-3 hours)
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**File**: `hooks/use-notifications.ts`
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Key changes:
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- Remove manual polling logic
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- Use `useUnifiedRefresh` hook
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- Add `requestDeduplicator` for API calls
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- Fix useEffect dependencies
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See `IMPLEMENTATION_PLAN_UNIFIED_REFRESH.md` Section 3.1 for full code.
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---
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#### 4. Refactor Notification Badge (1 hour)
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**File**: `components/notification-badge.tsx`
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Key changes:
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- Remove duplicate `useEffect` hooks
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- Use hook's `refresh` function for manual refresh
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- Remove manual fetch logic
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---
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#### 5. Refactor Navigation Bar Time (30 minutes)
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**File**: `components/main-nav.tsx` + `components/main-nav-time.tsx` (new)
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Key changes:
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- Extract time display to separate component
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- Use `useUnifiedRefresh` hook (1 second interval)
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- Fix static time issue
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See `IMPLEMENTATION_PLAN_UNIFIED_REFRESH.md` Section 3.7 for full code.
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---
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#### 6. Refactor Widgets (1 hour each)
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Start with high-frequency widgets:
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1. **Parole** (`components/parole.tsx`) - 30s interval
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2. **Calendar** (`components/calendar.tsx`) - 5min interval
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3. **News** (`components/news.tsx`) - 10min interval
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4. **Email** (`components/email.tsx`) - 1min interval
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5. **Duties** (`components/flow.tsx`) - 2min interval
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See `IMPLEMENTATION_PLAN_UNIFIED_REFRESH.md` Section 3.2 for example code.
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---
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## 📊 Expected Results
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### Before Implementation:
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- ❌ 120-150 API calls/minute
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- ❌ Memory leaks from uncleaned intervals
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- ❌ Duplicate requests
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- ❌ No coordination between widgets
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### After Implementation:
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- ✅ 40-50 API calls/minute (60-70% reduction)
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- ✅ No memory leaks
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- ✅ Request deduplication working
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- ✅ Centralized refresh coordination
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---
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## 🔍 Testing Checklist
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After each phase, verify:
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- [ ] No console errors
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- [ ] Widgets refresh at correct intervals
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- [ ] Manual refresh buttons work
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- [ ] No duplicate API calls (check Network tab)
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- [ ] No memory leaks (check Memory tab)
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- [ ] Cleanup on component unmount
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- [ ] Multiple tabs don't cause issues
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---
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## 🚨 Important Notes
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### Backward Compatibility
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All new code is designed to be:
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- ✅ Non-breaking (old code still works)
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- ✅ Gradual migration (one widget at a time)
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- ✅ Easy rollback (keep old implementations)
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### Migration Strategy
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1. **Phase 1**: Core infrastructure (DONE ✅)
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2. **Phase 2**: Fix critical issues
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3. **Phase 3**: Migrate notifications
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4. **Phase 4**: Migrate widgets one by one
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5. **Phase 5**: Remove old code
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### Feature Flags (Optional)
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If you want to toggle the new system:
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```typescript
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// In refresh manager
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const USE_UNIFIED_REFRESH = process.env.NEXT_PUBLIC_USE_UNIFIED_REFRESH !== 'false';
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if (USE_UNIFIED_REFRESH) {
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// Use new system
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} else {
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// Use old system
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}
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```
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---
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## 📈 Performance Monitoring
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### Metrics to Track
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1. **API Call Count**
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- Before: ~120-150/min
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- Target: ~40-50/min
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- Monitor in Network tab
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2. **Memory Usage**
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- Before: Growing over time
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- Target: Stable
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- Monitor in Memory tab
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3. **Refresh Accuracy**
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- Verify intervals are correct
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- Check last refresh times
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- Monitor refresh manager status
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### Debug Tools
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```typescript
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// Get refresh manager status
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const status = refreshManager.getStatus();
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console.log('Refresh Manager Status:', status);
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// Get pending requests
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const pendingCount = requestDeduplicator.getPendingCount();
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console.log('Pending Requests:', pendingCount);
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```
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---
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## 🎓 Learning Resources
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### Key Concepts
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1. **Singleton Pattern**: Refresh manager uses singleton
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2. **Request Deduplication**: Prevents duplicate calls
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3. **React Hooks**: Proper cleanup with useEffect
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4. **Memory Management**: Clearing intervals and refs
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### Code Patterns
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- **useRef for callbacks**: Prevents dependency issues
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- **Map for tracking**: Efficient resource management
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- **Promise tracking**: Prevents duplicate requests
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---
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## 🐛 Troubleshooting
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### Issue: Widgets not refreshing
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**Check**:
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1. Is refresh manager started? (`refreshManager.start()`)
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2. Is resource registered? (`refreshManager.getStatus()`)
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3. Is user authenticated? (`status === 'authenticated'`)
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### Issue: Duplicate API calls
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**Check**:
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1. Is request deduplication working? (`requestDeduplicator.getPendingCount()`)
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2. Are multiple components using the same resource?
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3. Is TTL too short?
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### Issue: Memory leaks
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**Check**:
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1. Are intervals cleaned up? (check cleanup functions)
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2. Are refs cleared? (`isMountedRef.current = false`)
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3. Are pending requests cleared? (check cleanup)
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---
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## 📝 Next Session Goals
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1. ✅ Core infrastructure created
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2. ⏭️ Fix Redis KEYS → SCAN
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3. ⏭️ Refactor notifications hook
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4. ⏭️ Refactor notification badge
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5. ⏭️ Refactor first widget (Parole)
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---
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## 🎉 Success!
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Once all widgets are migrated:
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- ✅ Unified refresh system
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- ✅ 60%+ reduction in API calls
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- ✅ No memory leaks
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- ✅ Better user experience
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- ✅ Easier maintenance
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---
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*Last Updated: Implementation Summary v1.0*
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