Database.Persist.SqlBackend.Internal.SqlPoolHooks

Documentation

data SqlPoolHooks m backend

A set of hooks that may be used to alter the behaviour of runSqlPoolWithExtensibleHooks in a backwards-compatible fashion.

Constructors

SqlPoolHooks

Fields

• alterBackend :: backend -> m backend

  Alter the backend prior to executing any actions with it.

• runBefore :: backend -> Maybe IsolationLevel -> m ()

  Run this action immediately before the action is performed.

• runAfter :: backend -> Maybe IsolationLevel -> m ()

  Run this action immediately after the action is completed.

• runOnException :: backend -> Maybe IsolationLevel -> SomeException -> m ()

  This action is performed when an exception is received. The exception is provided as a convenience - it is rethrown once this cleanup function is complete.