graphql-engine/server/src-lib/Hasura/Cache/Bounded.hs
Robert 11a454c2d6 server, pro: actually reformat the code-base using ormolu
This commit applies ormolu to the whole Haskell code base by running `make format`.

For in-flight branches, simply merging changes from `main` will result in merge conflicts.
To avoid this, update your branch using the following instructions. Replace `<format-commit>`
by the hash of *this* commit.

$ git checkout my-feature-branch
$ git merge <format-commit>^    # and resolve conflicts normally
$ make format
$ git commit -a -m "reformat with ormolu"
$ git merge -s ours post-ormolu

https://github.com/hasura/graphql-engine-mono/pull/2404

GitOrigin-RevId: 75049f5c12f430c615eafb4c6b8e83e371e01c8e
2021-09-23 22:57:37 +00:00

33 lines
1.3 KiB
Haskell

-- | graphql-engine used to have a query plan cache, which cached the execution
-- plan for a given graphql query (sans JSON variable values). After the PDV
-- refactor (see
-- [hasura/graphql-engine#4111](https://github.com/hasura/graphql-engine/pull/4111)),
-- this query plan cache was not needed anymore. For backwards compatibility
-- reasons, we still need to parse the configuration options from the CLI, although
-- the CLI option gets ignored.
--
-- Eventually, we can decide to stop parsing the CLI option
-- --query-plan-cache-size, at which point this module can be removed.
module Hasura.Cache.Bounded
( CacheSize (..),
parseCacheSize,
)
where
import Data.Aeson qualified as J
import Data.Word (Word16)
import GHC.Natural (Natural)
import Hasura.Prelude hiding (lookup)
newtype CacheSize = CacheSize {unCacheSize :: Word16}
deriving (Show, Read, Eq, Ord, Bounded, Num, Real, Integral, Enum, J.ToJSON, J.FromJSON)
parseCacheSize :: String -> Either String CacheSize
parseCacheSize v =
-- NOTE: naively using readMaybe Word16 will silently wrap
case readMaybe v :: Maybe Natural of
Just n | n <= max16 && n >= 0 -> return (CacheSize $ fromIntegral n)
_ -> throwError "cache size must be given as a number between 0 and 65535"
where
max16 = fromIntegral (maxBound :: Word16) :: Natural