Val Town Code SearchReturn to Val Town

16```
17├── backend/
18│   ├── database/
19│   │   ├── migrations.ts    # Database schema
20│   │   └── queries.ts       # Database operations
21│   ├── routes/
22│   │   ├── chat.ts         # Chat API endpoints
38
39The application runs on Val Town with:
40- Backend: Hono framework with SQLite database
41- Frontend: React with TailwindCSS
42- Real-time chat interface for wedding planning assistance

68/backend/ingestion/eventIngestion.ts
69/backend/processing/streamProcessor.ts
70/backend/storage/database.ts
71/backend/monitoring/metricsCollector.ts
72/backend/monitoring/healthChecker.ts
272NODE_ENV=production
273
274# Database Configuration
275DATABASE_URL=sqlite:./data/events.db
276DATABASE_POOL_SIZE=10
277
278# Monitoring Configuration
299    "host": "0.0.0.0"
300  },
301  "database": {
302    "type": "sqlite",
303    "path": "./data/events.db",
318## Performance Tuning
319
320### Database Optimization
321
322```sql
429## Backup and Recovery
430
431### Database Backup
432
433```bash
458
4592. **High Latency**
460   - Check database query performance
461   - Monitor network connectivity
462   - Review processing instance load

113
114**Components**:
115- **Time-Series Database**: Event storage with time-based partitioning
116- **Metrics Store**: Performance and health metrics
117- **Cache Layer**: Hot data and query result caching
1642. **Validation**: Schema validation and sanitization
1653. **Enrichment**: ID generation, timestamp assignment, partition key
1664. **Storage**: Persistent storage in time-series database
1675. **Processing**: Real-time processing and aggregation
1686. **Monitoring**: Metrics collection and health checks
174
175- **Processing Instances**: Auto-scale from 1 to 100+ instances
176- **Database Sharding**: Partition data across multiple nodes
177- **Load Balancing**: Distribute load across available instances
178- **Cache Distribution**: Distributed caching for hot data
207- **Target**: 1M+ events/second
208- **Achieved**: Scales linearly with instances
209- **Bottlenecks**: Database write capacity, network bandwidth
210- **Optimization**: Batching, compression, connection pooling
211
246- **Runtime**: Deno with TypeScript
247- **Web Framework**: Hono for HTTP handling
248- **Database**: SQLite with time-series optimization
249- **WebSockets**: Native Deno WebSocket support
250

95.deno/
96
97# Database files
98*.db
99*.sqlite

298    
299    try {
300      // Test database connectivity by attempting a simple query
301      const { sqlite } = await import("https://esm.town/v/stevekrouse/sqlite");
302      await sqlite.execute("SELECT 1");

1import { MetricsStorage, Metric } from "../storage/database.ts";
2
3export interface SystemMetrics {

1import { EventStorage, AggregateStorage, Event, Aggregate } from "../storage/database.ts";
2import { MetricsCollector } from "../monitoring/metricsCollector.ts";
3

1import { EventStorage, Event } from "../storage/database.ts";
2import { MetricsCollector } from "../monitoring/metricsCollector.ts";
3

1import { sqlite } from "https://esm.town/v/stevekrouse/sqlite";
2
3// Database schema for time-series event storage
4const EVENTS_TABLE = 'realtime_events_v1';
5const METRICS_TABLE = 'system_metrics_v1';
6const AGGREGATES_TABLE = 'event_aggregates_v1';
7
8export async function initializeDatabase() {
9  // Events table - optimized for time-series data
10  await sqlite.execute(`
73  `);
74
75  console.log("Database initialized successfully");
76}
77

5import { MetricsCollector } from "./monitoring/metricsCollector.ts";
6import { HealthChecker } from "./monitoring/healthChecker.ts";
7import { initializeDatabase } from "./storage/database.ts";
8
9const app = new Hono();
20const healthChecker = new HealthChecker(metricsCollector);
21
22// Initialize database on startup
23await initializeDatabase();
24
25// Start the stream processor