adv-web-scraper-api

Session Storage Adapters

Available Adapters

Memory Adapter

// src/storage/adapters/memory-storage.adapter.ts
interface MemorySession {
  id: string;
  data: Record<string, any>;
  createdAt: number;
  ttl: number;
}

• Pros: Fastest, no dependencies
• Cons: Lost on server restart
• Config:

  {
    "adapter": "memory",
    "ttl": 1800
  }
  

Redis Adapter

// src/storage/adapters/redis-storage.adapter.ts
interface RedisSession {
  id: string;
  data: string; // JSON stringified
  expiresAt: number;
}

• Pros: High performance, persistence
• Cons: Requires Redis server
• Config:

  {
    "adapter": "redis",
    "host": "localhost",
    "port": 6379,
    "ttl": 3600
  }
  

MongoDB Adapter

// src/storage/adapters/mongodb-storage.adapter.ts
interface MongoSession {
  _id: string;
  data: object;
  expiresAt: Date;
}

• Pros: Flexible schema, queryable
• Cons: Higher latency
• Config:

  {
    "adapter": "mongodb",
    "uri": "mongodb://localhost:27017",
    "dbName": "sessions",
    "ttl": 86400
  }
  

Performance Comparison

barChart
    title Requests Per Second
    x-axis Adapter
    y-axis RPS
    bar Memory: 12000
    bar Redis: 9500
    bar MongoDB: 3500

Choosing an Adapter

1. Development: Use memory for simplicity
2. Production: Redis for most use cases
3. Complex Data: MongoDB when you need querying

Custom Adapters

Implement StorageAdapterInterface:

export interface StorageAdapterInterface {
  get(id: string): Promise<SessionData>;
  set(id: string, data: SessionData, ttl: number): Promise<void>;
  delete(id: string): Promise<void>;
  clear(): Promise<void>;
}

Register in storage-factory.ts: ```typescript StorageFactory.register(‘custom’, CustomAdapter);