System.Log.HLogger

Documentation

data LogMessage

Used by logging implementations only. Contains information about the log message.

Constructors

LogMessage

Fields

message :: String

level :: LogLevel

data Logger

This object provides the logging API. Consult the documentation for the logging implementation (or SimpleLogger) about how to acquire a Logger object.

Constructors

Logger

Fields

logDebug :: String -> IO ()

Logs a debug message. Debug messages are the least significant messages.

logInfo :: String -> IO ()

Logs a purely informational message. Use logNotice instead of the information message is significant.

logNotice :: String -> IO ()

Logs a significant purely informational message. Use logNotice instead of the information message is significant.

logWarning :: String -> IO ()

Logs a message signaling a warning condition.

logError :: String -> IO ()

Logs a message signaling that a non-critical error has occurred.

logCritical :: String -> IO ()

Logs a message signaling that a critical error has occurred.

logAlert :: String -> IO ()

Logs a message signaling that an action must be taken.

logEmergency :: String -> IO ()

Logs a message signaling that the system is unusable.

stopLogger :: IO ()

Stops the logger. This action is asynchronous.

logger :: (Chan (Maybe LogMessage) -> IO ()) -> IO Logger

Used by logging implementations only. Provides a Logger object, given a looping function operating on a LogMessage channel.