cache2k Java Caching

cache2k is an in-memory high performance Java Caching library.

  Cache<String,String> cache = new Cache2kBuilder<String, String>() {

}

  .expireAfterWrite(5, TimeUnit.MINUTES)
 // expire/refresh after 5 minutes
  .resilienceDuration(30, TimeUnit.SECONDS) // cope with at most 30 seconds

  // outage before propagating 

  // exceptions
  .refreshAhead(true)

  // keep fresh when expiring
  .loader(this::expensiveOperation)

// auto populating function
  .build();

For a detailed introduction continue with Getting Started.

Features at a glance

• Single small jar file (less than 400k) with no external dependencies
• Even smaller, for use with Android
• One of the fastest cache for JVM local caching, see the benchmarks page
• Java 6 and Android compatible
• Leverages Java 8 to increase performance (if possible)
• 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 and defined API with stable and concise interface
• complete JCache / JSR107 support
• XML based configuration, to separate cache tuning from logic

More...

For more documentation and latest news, see the cache2k homepage.