Haxl.Core.Flags

The Flags type and related functions. This module is provided for access to Haxl internals only; most users should import Haxl.Core instead.

Tracing flags

data Flags

Flags that control the operation of the engine.

Constructors

Flags

Fields

• trace :: !Int

  Tracing level (0 = quiet, 3 = very verbose).

• report :: !Int

  Report level: * 0 = quiet * 1 = outgone fetches, for debugging eg: timeouts * 2 = data fetch stats & errors * 3 = (same as 2, this used to enable errors) * 4 = profiling * 5 = log stack traces of dataFetch calls

• caching :: !Int

  Non-zero if caching is enabled. If caching is disabled, then we still do batching and de-duplication, but do not cache results.

• recording :: !Int

  Non-zero if recording is enabled. This allows tests to record cache calls for datasources by making uncachedRequest behave like dataFetch

defaultFlags :: Flags

ifTrace :: Monad m => Flags -> Int -> m a -> m ()

Runs an action if the tracing level is above the given threshold.

ifReport :: Monad m => Flags -> Int -> m a -> m ()

Runs an action if the report level is above the given threshold.

ifProfiling :: Monad m => Flags -> m a -> m ()