Database.CQL.IO.Log

Documentation

data Logger

A Logger provides functions for logging textual messages as well as binary CQL protocol requests and responses emitted by the client.

Constructors

Logger

Fields

• logMessage :: LogLevel -> Builder -> IO ()
• logRequest :: ByteString -> IO ()
• logResponse :: ByteString -> IO ()

data LogLevel

Log levels used by the client.

Constructors

LogDebug

Verbose debug information that should not be enabled in production environments.

LogInfo

General information concerning client and cluster state.

LogWarn

Warnings of potential problems that should be investigated.

LogError

Errors that should be investigated and monitored.

Instances

Eq LogLevel

Defined in Database.CQL.IO.Log

Methods

(==) :: LogLevel -> LogLevel -> Bool

(/=) :: LogLevel -> LogLevel -> Bool

Ord LogLevel

Defined in Database.CQL.IO.Log

Methods

compare :: LogLevel -> LogLevel -> Ordering

(<) :: LogLevel -> LogLevel -> Bool

(<=) :: LogLevel -> LogLevel -> Bool

(>) :: LogLevel -> LogLevel -> Bool

(>=) :: LogLevel -> LogLevel -> Bool

max :: LogLevel -> LogLevel -> LogLevel

min :: LogLevel -> LogLevel -> LogLevel

Read LogLevel

Defined in Database.CQL.IO.Log

Methods

readsPrec :: Int -> ReadS LogLevel

readList :: ReadS [LogLevel]

readPrec :: ReadPrec LogLevel

readListPrec :: ReadPrec [LogLevel]

Show LogLevel

Defined in Database.CQL.IO.Log

Methods

showsPrec :: Int -> LogLevel -> ShowS

show :: LogLevel -> String

showList :: [LogLevel] -> ShowS

nullLogger :: Logger

A logger that discards all log messages.

stdoutLogger :: LogLevel -> Logger

A logger that writes all log messages to stdout, discarding log messages whose level is less than the given level. Requests and responses are logged on debug level, formatted in hexadecimal blocks.

logDebug :: Logger -> Builder -> IO ()

logInfo :: Logger -> Builder -> IO ()

logWarn :: Logger -> Builder -> IO ()

logError :: Logger -> Builder -> IO ()

module Data.ByteString.Builder