Eventful.Store.Memory

Documentation

tvarEventStoreReader :: TVar (EventMap event) -> VersionedEventStoreReader STM event

An EventStoreReader that stores events in a TVar and runs in STM. This functions initializes the store by creating the TVar and hooking up the event store API to that TVar.

tvarEventStoreWriter :: TVar (EventMap event) -> EventStoreWriter STM event

tvarGlobalEventStoreReader :: TVar (EventMap event) -> GlobalEventStoreReader STM event

Analog of tvarEventStoreReader for a GlobalEventStoreReader

stateEventStoreReader :: MonadState (EventMap event) m => VersionedEventStoreReader m event

Specialized version of embeddedStateEventStoreReader that only contains an EventMap in the state.

stateEventStoreWriter :: MonadState (EventMap event) m => EventStoreWriter m event

Specialized version of embeddedStateEventStoreWriter that only contains an EventMap in the state.

stateGlobalEventStoreReader :: MonadState (EventMap event) m => GlobalEventStoreReader m event

embeddedStateEventStoreReader :: MonadState s m => (s -> EventMap event) -> VersionedEventStoreReader m event

An EventStore that runs on some MonadState that contains an EventMap. This is useful if you want to include other state in your MonadState.

embeddedStateEventStoreWriter :: MonadState s m => (s -> EventMap event) -> (s -> EventMap event -> s) -> EventStoreWriter m event

embeddedStateGlobalEventStoreReader :: MonadState s m => (s -> EventMap event) -> GlobalEventStoreReader m event

Analogous to embeddedStateEventStore for a GlobalStreamEventStore.

data EventMap event

Internal data structure used for the in-memory event stores.

Instances

Show event => Show (EventMap event)

Methods

showsPrec :: Int -> EventMap event -> ShowS

show :: EventMap event -> String

showList :: [EventMap event] -> ShowS

emptyEventMap :: EventMap event

What it says on the tin, an initialized empty EventMap

eventMapTVar :: IO (TVar (EventMap event))

Initialize an EventMap in a TVar

module Eventful.Store.Class