log

package
v0.8.0 Latest Latest
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 Go to latest Published: Nov 9, 2021 License: Apache-2.0 Imports: 3 Imported by: 20

Documentation

Overview

Package log implements the logger interface of go-perun. Users are expected to pass an implementation of this interface to harmonize go-perun's logging with their application logging.

It mimics the interface of logrus, which is go-perun's logger of choice It is also possible to pass a simpler logger like the standard library's log logger by converting it to a perun logger. Use the Fieldify and Levellify factories for that.

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

func Debug 

func Debug(args ...interface{})

Debug calls Debug on the global Logger object.

func Debugf 

func Debugf(format string, args ...interface{})

Debugf calls Debugf on the global Logger object.

func Debugln 

func Debugln(args ...interface{})

Debugln calls Debugln on the global Logger object.

func Error 

func Error(args ...interface{})

Error calls Error on the global Logger object.

func Errorf 

func Errorf(format string, args ...interface{})

Errorf calls Errorf on the global Logger object.

func Errorln 

func Errorln(args ...interface{})

Errorln calls Errorln on the global Logger object.

func Fatal 

func Fatal(args ...interface{})

Fatal calls Fatal on the global Logger object.

func Fatalf 

func Fatalf(format string, args ...interface{})

Fatalf calls Fatalf on the global Logger object.

func Fatalln 

func Fatalln(args ...interface{})

Fatalln calls Fatalln on the global Logger object.

func Info 

func Info(args ...interface{})

Info calls Info on the global Logger object.

func Infof 

func Infof(format string, args ...interface{})

Infof calls Infof on the global Logger object.

func Infoln 

func Infoln(args ...interface{})

Infoln calls Infoln on the global Logger object.

func Panic 

func Panic(args ...interface{})

Panic calls Panic on the global Logger object.

func Panicf 

func Panicf(format string, args ...interface{})

Panicf calls Panicf on the global Logger object.

func Panicln 

func Panicln(args ...interface{})

Panicln calls Panicln on the global Logger object.

func Print 

func Print(args ...interface{})

Print calls Print on the global Logger object.

func Printf 

func Printf(format string, args ...interface{})

Printf calls Printf on the global Logger object.

func Println 

func Println(args ...interface{})

Println calls Println on the global Logger object.

func Set 

func Set(l Logger)

Set sets the framework logger. It is set to the none-logger by default. Set accepts nil and then sets the none-logger.

func Trace 

func Trace(args ...interface{})

Trace calls Trace on the global Logger object.

func Tracef 

func Tracef(format string, args ...interface{})

Tracef calls Tracef on the global Logger object.

func Traceln 

func Traceln(args ...interface{})

Traceln calls Traceln on the global Logger object.

func Warn 

func Warn(args ...interface{})

Warn calls Warn on the global Logger object.

func Warnf 

func Warnf(format string, args ...interface{})

Warnf calls Warnf on the global Logger object.

func Warnln 

func Warnln(args ...interface{})

Warnln calls Warnln on the global Logger object.

Types

type Embedding added in v0.4.0 

type Embedding struct {
	// contains filtered or unexported fields
}

An Embedding can be embedded into any struct to endow it with a logger and getter and setter for this logger. Embedding implements an Owner.

func MakeEmbedding added in v0.4.0 

func MakeEmbedding(log Logger) Embedding

MakeEmbedding returns an Embedding around log.

func (Embedding) Log added in v0.4.0 

func (em Embedding) Log() Logger

Log returns the embedded Logger.

func (*Embedding) SetLog added in v0.4.0 

func (em *Embedding) SetLog(l Logger)

SetLog sets the embedded Logger.

type Fields 

type Fields map[string]interface{}

Fields is a collection of fields that can be passed to FieldLogger.WithFields.

type Level 

type Level int8

Level is the log level. 

const (
	// FatalLevel calls the wrapped logger's Fatal method with the prefix "[fatal]".
	// The wrapped logger should usually immediately exit the program with
	// os.Exit(1) or similar.  It it the highest level of severity.
	FatalLevel Level = iota - defaultLogLevelShift // -3: default level WarnLevel
	// PanicLevel calls the wrapped logger's Panic method with the prefix "[panic]".
	// The wrapped logger should usually call panic with the given message.
	PanicLevel
	// ErrorLevel calls the wrapped logger's Print method with the prefix "[error]".
	ErrorLevel
	// WarnLevel calls the wrapped logger's Print method with the prefix "[warn]".
	// It is the default level.
	WarnLevel
	// InfoLevel calls the wrapped logger's Print method with the prefix "[info]".
	InfoLevel
	// DebugLevel calls the wrapped logger's Print method with the prefix "[debug]".
	DebugLevel
	// TraceLevel calls the wrapped logger's Print method with the prefix "[trace]".
	TraceLevel
)

func (Level) String 

func (l Level) String() string

String returns the string representation.

type LevelLogger 

type LevelLogger interface {
	StdLogger

	Tracef(format string, args ...interface{})
	Debugf(format string, args ...interface{})
	Infof(format string, args ...interface{})
	Warnf(format string, args ...interface{})
	Errorf(format string, args ...interface{})

	Trace(...interface{})
	Debug(...interface{})
	Info(...interface{})
	Warn(...interface{})
	Error(...interface{})

	Traceln(...interface{})
	Debugln(...interface{})
	Infoln(...interface{})
	Warnln(...interface{})
	Errorln(...interface{})
}

LevelLogger is an extension to the StdLogger with different verbosity levels.

type Levellified 

type Levellified struct {
	// wrapped logger
	StdLogger
	// Lvl is the current logging level
	Lvl Level
}

Levellified levellifies a standard logger. Calls are just forwarded to the wrapped logger's Print{,f,ln} methods with the prefix [level], except for levels PanicLevel and FatalLevel, which are forwarded to the respective methods.

func (*Levellified) Debug 

func (l *Levellified) Debug(args ...interface{})

Debug implements log level debug.

func (*Levellified) Debugf 

func (l *Levellified) Debugf(format string, args ...interface{})

Debugf implementents log level debug and format parameters.

func (*Levellified) Debugln 

func (l *Levellified) Debugln(args ...interface{})

Debugln implements log.Debugln with white spaces in between arguments.

func (*Levellified) Error 

func (l *Levellified) Error(args ...interface{})

Error implements log level error.

func (*Levellified) Errorf 

func (l *Levellified) Errorf(format string, args ...interface{})

Errorf implementents log level error and format parameters.

func (*Levellified) Errorln 

func (l *Levellified) Errorln(args ...interface{})

Errorln implements log.Errorln with white spaces in between arguments.

func (*Levellified) Info 

func (l *Levellified) Info(args ...interface{})

Info implements log level info.

func (*Levellified) Infof 

func (l *Levellified) Infof(format string, args ...interface{})

Infof implementents log level info and format parameters.

func (*Levellified) Infoln 

func (l *Levellified) Infoln(args ...interface{})

Infoln implements log.Infoln with white spaces in between arguments.

func (*Levellified) Trace 

func (l *Levellified) Trace(args ...interface{})

Trace implements log level trace.

func (*Levellified) Tracef 

func (l *Levellified) Tracef(format string, args ...interface{})

Tracef implementents log level trace and format parameters.

func (*Levellified) Traceln 

func (l *Levellified) Traceln(args ...interface{})

Traceln implements log.TraceLn with white spaces in between arguments.

func (*Levellified) Warn 

func (l *Levellified) Warn(args ...interface{})

Warn implements log level warn.

func (*Levellified) Warnf 

func (l *Levellified) Warnf(format string, args ...interface{})

Warnf implementents log level warn and format parameters.

func (*Levellified) Warnln 

func (l *Levellified) Warnln(args ...interface{})

Warnln implements log.Warnln with white spaces in between arguments.

type Logger 

type Logger interface {
	LevelLogger

	WithField(key string, value interface{}) Logger
	WithFields(Fields) Logger
	WithError(error) Logger
}

Logger is a LevelLogger with structured field logging capabilities. This is the interface that needs to be passed to go-perun.

func AppendField added in v0.4.0 

func AppendField(owner Owner, key string, value interface{}) Logger

AppendField sets the given field in the owner's logger. The resulting logger is also returned.

func AppendFields added in v0.4.0 

func AppendFields(owner Owner, fs Fields) Logger

AppendFields sets the given fields in the owner's logger. The resulting logger is also returned.

func Get 

func Get() Logger

Get returns the currently set framework logger.

func WithError 

func WithError(err error) Logger

WithError calls WithError on the global Logger object.

func WithField 

func WithField(key string, value interface{}) Logger

WithField calls WithField on the global Logger object.

func WithFields 

func WithFields(fs Fields) Logger

WithFields calls WithFields on the global Logger object.

type Owner added in v0.4.0 

type Owner interface {
	// Log returns the logger used by the Owner.
	Log() Logger
	// SetLog sets the logger that the Owner uses in the future.
	SetLog(Logger)
}

An Owner owns a Logger that can be retrieved and a new Logger can be set.

type StdLogger 

type StdLogger interface {
	Printf(format string, args ...interface{})
	Print(...interface{})
	Println(...interface{})

	Fatalf(format string, args ...interface{})
	Fatal(...interface{})
	Fatalln(...interface{})

	Panicf(format string, args ...interface{})
	Panic(...interface{})
	Panicln(...interface{})
}

StdLogger describes the interface of the standard library log package logger. It is the base for more complex loggers. A StdLogger can be converted into a LevelLogger by wrapping it with a Levellified struct.

Source Files

View all Source files

Directories

Path Synopsis
Package logrus contains an adaptation of the github.com/sirupsen/logrus project to our log interface.
 Package logrus contains an adaptation of the github.com/sirupsen/logrus project to our log interface.

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