What is the Singleton Pattern?#

Singleton ensures that a class has only one instance and provides a global access point to it. It is commonly used for coordinating system-wide resources like database connection pools or file loggers.

Everyday Analogy#

An office network printer shared by multiple employees. Everyone sends their document to that single physical machine rather than each person creating a distinct virtual printer.

Common Use Cases#

  • Shared database connection pooling
  • Application runtime configuration caches
  • Centralized system telemetry loggers