ExpiringMap provides a thread-safe, low-overhead map implementation designed for scenarios requiring automatic key expiration. It's a high-performance alternative to standard maps, offering features like flexible expiration policies and variable expiration times. The library is built with a focus on efficiency and minimal dependencies, making it suitable for a wide range of applications demanding reliable data management with time constraints.
ExpiringMap is notable for its high performance and zero-dependency design. It offers flexible expiration policies, including based on creation time, last access time, and maximum size. The library also supports variable expiration, allowing individual entries to have different expiration times. Expiration listeners provide a mechanism for reacting to expiring entries.
- Thread Safety: Provides a thread-safe map implementation for concurrent access.
- Expiration Policies: Supports expiration based on creation time, last access time, and maximum size.
- Variable Expiration: Enables individual entries to have custom expiration times and policies.
- Expiration Listeners: Allows for notification when entries expire via asynchronous or synchronous listeners.
- Lazy Entry Loading: Supports lazy loading of entries using an EntryLoader.
- Expiration Introspection: Provides methods to query expected expiration times and configured expiration.
- Google App Engine Support: Includes specific considerations for use on Google App Engine, including thread factory configuration.
ExpiringMap is a mature and well-established project with a long release history and active maintenance. It has a significant number of stars and forks on GitHub, indicating a stable and reliable codebase. The library has comprehensive documentation and an active community contributing through Javadocs and usage examples. Recent commits suggest ongoing development and support.
ExpiringMap is valuable for developers working with data that needs to expire automatically, such as caching systems, session management, and temporary data storage. It simplifies the management of time-sensitive information, avoiding the need for manual expiration logic and reducing the risk of stale data. By automating data expiration, ExpiringMap improves application reliability and resource management.