Introduction
The Proxy pattern acts as a surrogate or placeholder for another object, controlling access while adding extra functionality like lazy initialization, security checks, or logging.
Real-Life Example
Imagine a VIP club where guests must pass through a security checkpoint before entering. The security guard (proxy) verifies identities before allowing access, ensuring that only authorized individuals get in.
Pros
Controls access to expensive or sensitive resources.
Adds functionality like caching, logging, or authentication.
Improves performance through lazy-loading mechanisms.
Cons
Introduces an extra layer of complexity.
Improper use can lead to unnecessary indirection and slowdowns.
When to Use It
When controlling access to an object (e.g., security or permission management).
When implementing lazy initialization to optimize performance.
Avoid when direct access is simpler and doesn’t require extra checks.
Conclusion
Proxy is a strategic pattern for controlled access but should be implemented carefully to avoid unnecessary overhead.
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