Digipost Cache

Library containing caching functionality used by Digipost projects.

Feature overview

In-memory cache

The entry point for creating in-memory caches can be found in the no.digipost.cache2.inmemory package, which wraps the Caffeine cache implementation. In addition to standard key-value cache, this library also offers a specialized API for caching a shared single object (SingleCached<V>).

Fallback

Digipost Cache also supports a fallback-concept, currently implemented as storing cache values on the file system. In the event of a cache value Loader failing (e.g. if it resolves the value over the network or other error-prone I/O), the last value it successfully loaded will instead be read from a disk-file. Other ways to store and read values for fallback can be implemented by implementing FallbackKeeper for storing a value for fallback, and the already mentioned Loader for loading an already stored fallback value.