Safe HaskellNone

IHP.Log

Description

Import this module qualified! All code examples assume you have imported the module as follows:

import qualified IHP.Log as Log
Synopsis

Documentation

debug :: (?context :: context, LoggingProvider context) => Text -> IO () Source #

Log a debug level message.

action CreateUserAction { .. } = do
    Log.debug "entered CreateUserAction"
    ...

info :: (?context :: context, LoggingProvider context) => Text -> IO () Source #

Log an info level message.

action UsersAction = do
    users <- query @User |> fetch
    Log.info $ show (lengh users) <> " users fetched."
    ...

warn :: (?context :: context, LoggingProvider context) => Text -> IO () Source #

Log a warning level message.

action UsersAction = do
    users <- query @User |> fetch
    whenEmpty users $ Log.warn "No users found. Something might be wrong!"
    ...

error :: (?context :: context, LoggingProvider context) => Text -> IO () Source #

Log a warning level message.

   action CreatePostAction = do
       let post = newRecord @Post
       post
           |> buildPost
           |> ifValid case
               Left post -> do
                   Log.error "Invalid post."
                   render NewView { .. }
               Right post -> do
                   post post | createRecord
                   setSuccessMessage "Post created"
                   redirectTo PostsAction

fatal :: (?context :: context, LoggingProvider context) => Text -> IO () Source #

Log a fatal level message. Note this does not exit the program for you -- it only logs to the Fatal log level.

Log.fatal "Unrecoverable application error!"

unknown :: (?context :: context, LoggingProvider context) => Text -> IO () Source #

Log an "unknown" level message. This is the highest log level and will always be output by the logger.

Log.unknown "This will be sent to the logger no matter what!"

makeRequestLogger :: RequestLoggerSettings -> Logger -> Middleware Source #

Wraps RequestLogger from wai-extra to log to an IHP logger. See RequestLogger.

defaultRequestLogger :: Logger -> Middleware Source #

Create a request logger with default settings wrapped in an IHP logger. See RequestLogger.