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cache2k v1.5.1.Alpha Release Notes

Release Date: 2020-10-04 // over 3 years ago

  • 🚀 This is a preview release for evaluation purposes and should not be used in production.
    The final release is planed as "Gulf of Thailand 1.6.0.Final".

    🆕 New and Noteworthy

    • 🆕 New timer based on hierarchical timer wheels, which is more performance and
      scales linear with more cache entries
    • No more extra thread per cache, in cache timer is used, e.g. for expiry

    Possible Breakages

    • 0️⃣ No separate executor for async listeners by default any more.
      If an async listener executor is not specified it uses the executor
      0️⃣ defined by Cache2kBuilder.executor which in turn defaults to the
      common ForkJoinPool in Java 8.
    • Slightly more lag for operations triggered by time, e.g. cache
      cleanup after expiry, calls of expiry listeners, refreshing.
      The lag can be controlled by Cache2kBuilder.timerLag

    API Changes

    • 🗄 Deprecated ExpiryTimeValues.NO_CACHE
    • 🗄 Deprecated Cache2kBuilder.prefetchExecutor, introduced Cache2kBuilder.refreshExecutor (rename)

    🛠 Fixes and Improvements

    • ✂ Remove hash quality metric
    • MutableCacheEntry.reload() does load the entry even if already cached