Meaning
A decorator that ensures a class has only one instance, returning the same instance on every call.
Primary Function
Enforces the singleton design pattern by caching the first instantiated object per class and returning it on subsequent calls.
Communicative Purpose
Defines a reusable decorator that enforces singleton instantiation for any class it decorates.
Função primária
Enforces the singleton design pattern by caching the first instantiated object per class and returning it on subsequent calls.
Propósito comunicativo
Defines a reusable decorator that enforces singleton instantiation for any class it decorates.
Situações de gatilho
When a class should have exactly one instance throughout the program lifecycle, such as a configuration manager, logger, or connection pool.
Contextos
Used in software design where global state is needed but global variables are discouraged; common in configuration, caching, logging, and hardware abstraction layers.
Família do chunk
- singleton pattern
- factory pattern
- dependency injection
- monostate pattern
Upgrade path
Consider using metaclass-based singleton or module-level instance for thread‑safety and subclass safety.
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