Haxl.Core.Env

The Haxl monad environment.

Documentation

data Env u

The data we carry around in the Haxl monad.

Constructors

Env

Fields

cacheRef :: IORef DataCache

memoRef :: IORef DataCache

flags :: Flags

userEnv :: u

statsRef :: IORef Stats

states :: StateStore

Data sources and other components can store their state in here. Items in this store must be instances of StateKey.

emptyEnv :: u -> IO (Env u)

A new, empty environment.

initEnv :: StateStore -> u -> IO (Env u)

Initializes an environment with DataStates and an input map.

initEnvWithData :: StateStore -> u -> Caches -> IO (Env u)

Initialize an environment with a StateStore, an input map, a preexisting DataCache, and a seed for the random number generator.

caches :: Env u -> Caches