#how do I cache data from db

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wind garden
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as above

polar vergeBOT
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fading flint
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Caching is a huge topic

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it would help if you could narrow down what you want more

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do you want to cache

  • In memory, forever (ConcurrentHashMap might be a good use)
  • In memory, with custom expiration logic (the caffiene library would be good)
  • Out of memory, shared between nodes (hello redis)
  • In memory, but implicitly because you are doing ORM nonsense
  • ...
rigid flame
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Also, unless it's absolutely performance critical, DON'T

fading flint
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in a sense, all data fetching is caching

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since by the time you ask your database a question and get the answer, the answer to the question might have changed

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and there isn't much you can do about that sometimes