haxl-2.0.0.0: A Haskell library for efficient, concurrent, and concise data access.

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LanguageHaskell2010

Haxl.Core.Flags

Contents

Description

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

Synopsis

Tracing flags

data Flags Source #

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 = quiet (legacy, this used to do something) * 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

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

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

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

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

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