logger

Documentation

Overview

Package logger defines a simple logger API with level of logging control.

Index

• type ConfigLogLevel
  • func (cll *ConfigLogLevel) ConfigFromJSONString()
  • func (cll ConfigLogLevel) Level() string
  • func (cll *ConfigLogLevel) SetFromString(enc string) error
  • func (cll *ConfigLogLevel) UnmarshalJSON(b []byte) error
• type Logger
  • func NewSimpleLogger(w io.Writer, level string) Logger
  • func NewSimpleLoggerFromMinimalLogger(minLog MinimalLogger, level string) Logger
• type MinimalLogger

Types

type ConfigLogLevel

type ConfigLogLevel string

ConfigLogLevel can hold a log level in a configuration struct.

func (*ConfigLogLevel) ConfigFromJSONString

func (cll *ConfigLogLevel) ConfigFromJSONString()

func (ConfigLogLevel) Level

func (cll ConfigLogLevel) Level() string

Level returns the log level string held in cll.

func (*ConfigLogLevel) SetFromString

func (cll *ConfigLogLevel) SetFromString(enc string) error

func (*ConfigLogLevel) UnmarshalJSON

func (cll *ConfigLogLevel) UnmarshalJSON(b []byte) error

type Logger

type Logger interface {
	// Re-expose base Output for logging events.
	Output(calldept int, s string) error
	// Errorf logs an error.
	Errorf(format string, v ...interface{})
	// Fatalf logs an error and exits the program with os.Exit(1).
	Fatalf(format string, v ...interface{})
	// PanicStackf logs an error message and a stacktrace, for use
	// in panic recovery.
	PanicStackf(format string, v ...interface{})
	// Infof logs an info message.
	Infof(format string, v ...interface{})
	// Debugf logs a debug message.
	Debugf(format string, v ...interface{})
}

Logger is a simple logger interface with logging at levels.

func NewSimpleLogger

func NewSimpleLogger(w io.Writer, level string) Logger

NewSimpleLogger creates a logger logging only up to the given level. The level can be, in order: "error", "info", "debug". It takes an io.Writer.

func NewSimpleLoggerFromMinimalLogger

func NewSimpleLoggerFromMinimalLogger(minLog MinimalLogger, level string) Logger

NewSimpleLoggerFromMinimalLogger creates a logger logging only up to the given level. The level can be, in order: "error", "info", "debug". It takes a value just implementing stlib Logger.Output().

type MinimalLogger

type MinimalLogger interface {
	Output(calldepth int, s string) error
}

MinimalLogger is the minimal interface required to build a simple logger.