async-refresh alternatives and similar packages

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async-refresh-tokens

4.4 0.0 async-refresh VS async-refresh-tokens

The async-refresh package specialized for refreshing of access tokens.

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README

async-refresh

About

This is Haskell library implementing the logic for refreshing of expiring data according to user-provided actions.

Usage

Create a new configuration using newAsyncRefreshConf, providing the action to be used for data refreshing.
Adjust the configuration using the asyncRefreshConfSet* functions, in particular using asyncRefreshConfSetCallback.
Use newAsyncRefresh to initiate a new thread managing the asynchronous refreshing.

Example

The following IO action produces a TVar which is updated every ten seconds to contain the current time (wrapped in an Either SomeException, because refreshing may fail).

periodicTimeUpdater :: IO (TVar (Either SomeException UTCTime))
periodicTimeUpdater = runStderrLoggingT $ do
  timeStore <- liftIO $ newTVarIO (Left (toException NotFound))
  let conf = newAsyncRefreshConf (RefreshResult <$> liftIO getCurrentTime <*> pure Nothing)
        & asyncRefreshConfSetLabel "CurrentTime updated every 10 seconds"
        & asyncRefreshConfSetDefaultInterval (10 * 10^3)
        & asyncRefreshConfSetCallback (liftIO . atomically . writeTVar timeStore . fmap refreshResult)
  _ <- newAsyncRefresh conf
  return timeStore