Freaks City

The Problem with Basic Future When discussing asynchronous programming, the Future interface immediately comes to mind. However, JDK's Future has a significant limitation that many developers overlook. When you call future.get() on the client side, it blocks the current thread until the result is available. This is essentially a half-baked impl ...

Overview What is Caching? A cache is defined as storage for content that may be needed again in the future, allowing for rapid retrieval. Caches are temporary collections of data that are either duplicates of information located elsewhere or results of computations. Data already present in a cache can be accessed repeatedly at minimal time and ...

Solving Cache Penetration Consider a typical product lookup service: public Product getProductById(Long id) { Product product = cache.get(id); if (product != null) { return product; } product = database.query(id); if (product != null) { cache.put(id, product); } return product; } If a product ID ...

Guava Cache is a robust, thread-safe in-memory caching library provided by Google's Guava toolkit. Built atop principles similar to ConcurrentHashMap, it extends core map functionality with rich cache-specific features—such as expiration, size constraints, automatic loading, and fine-grained concurrency control—while remaining lightweight and z ...