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https://cache2k.org/
Refresh ahead 기능이 있음
Features at a glance
- Small jar file (less than 400k) with no external dependencies
- Fastest access times, due to non blocking and wait free access of cached values, Blog article
- Pure Java code, no use of sun.misc.Unsafe
- Thread safe, with a complete set of atomic operations
- Resilience and smart exception handling
- Null value support, see User Guide - Null Values
- Automatic Expiry and Refresh: duration or point in time, variable expiry per entry, delta calculations
- CacheLoader with blocking read through, see User Guide - Loading and Read Through
- CacheWriter
- Event listeners
- Refresh ahead reduces latency
- Low Overhead Statistics and JMX support
- Separate API with stable and concise interface
- complete JCache / JSR107 support
- XML based configuration, to separate cache tuning from logic
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