Happstack.Server.Plugins.Dynamic

Documentation

data PluginHandle

initPlugins :: IO PluginHandle

initialize the plugin system and return a PluginHandle

withServerPart :: Name -> ExpQ

dynamically load the specified symbol pass it as an argument to the supplied server monad function.

This is a wrapper aronud withServerPart_ which ensures the first and second argument stay in-sync.

Usage:

 $(withServerPart 'symbol) pluginHandle $ \a -> ...

withServerPart_

Arguments

:: (MonadIO m, ServerMonad m, FilterMonad Response m, WebMonad Response m)

=> Name

name of the symbol to dynamically load

-> a

the symbol (must be the function refered to by the Name argument)

-> PluginHandle

Handle to the function reloader

-> (a -> m b)

function which uses the loaded result

-> m b

dynamically load the specified symbol pass it as an argument to the supplied server monad function.

If something fails, this function will return '500 Internal Server Error' and a list of the errors encountered.

see also: withServerPart