logger

package
v3.4.7 Latest Latest
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 Go to latest Published: Jul 5, 2021 License: Apache-2.0 Imports: 11 Imported by: 0

Documentation

Overview

Package logger provides a log interface

Index

Constants

This section is empty.

Variables

View Source 
var (
	// DefaultLogger variable
	DefaultLogger Logger = NewLogger()
	// DefaultLevel used by logger
	DefaultLevel Level = InfoLevel
)

Functions

func Debug 

func Debug(ctx context.Context, args ...interface{})

Debug writes msg to default logger on debug level

func Debugf 

func Debugf(ctx context.Context, msg string, args ...interface{})

Debugf writes formatted msg to default logger on debug level

func Error 

func Error(ctx context.Context, args ...interface{})

Error writes msg to default logger on error level

func Errorf 

func Errorf(ctx context.Context, msg string, args ...interface{})

Errorf writes formatted msg to default logger on error level

func Fatal 

func Fatal(ctx context.Context, args ...interface{})

Fatal writes msg to default logger on fatal level

func Fatalf 

func Fatalf(ctx context.Context, msg string, args ...interface{})

Fatalf writes formatted msg to default logger on fatal level

func Info 

func Info(ctx context.Context, args ...interface{})

Info writes msg to default logger on info level

func Infof 

func Infof(ctx context.Context, msg string, args ...interface{})

Infof writes formatted msg to default logger on info level

func Init 

func Init(opts ...Option) error

Init initialize logger

func NewContext 

func NewContext(ctx context.Context, l Logger) context.Context

NewContext stores logger into passed context

func Trace 

func Trace(ctx context.Context, args ...interface{})

Trace writes msg to default logger on trace level

func Tracef 

func Tracef(ctx context.Context, msg string, args ...interface{})

Tracef writes formatted msg to default logger on trace level

func V 

func V(level Level) bool

V returns true if passed level enabled in default logger

func Warn 

func Warn(ctx context.Context, args ...interface{})

Warn writes msg to default logger on warn level

func Warnf 

func Warnf(ctx context.Context, msg string, args ...interface{})

Warnf writes formatted msg to default logger on warn level

Types

type Level 

type Level int8

Level means logger level 

const (
	// TraceLevel level. Designates finer-grained informational events than the Debug.
	TraceLevel Level = iota - 2
	// DebugLevel level. Usually only enabled when debugging. Very verbose logging.
	DebugLevel
	// InfoLevel level. General operational entries about what's going on inside the application.
	InfoLevel
	// WarnLevel level. Non-critical entries that deserve eyes.
	WarnLevel
	// ErrorLevel level. Used for errors that should definitely be noted.
	ErrorLevel
	// FatalLevel level. Logs and then calls `os.Exit(1)`. highest level of severity.
	FatalLevel
)

func GetLevel 

func GetLevel(levelStr string) (Level, error)

GetLevel converts a level string into a logger Level value. returns an error if the input string does not match known values.

func (Level) Enabled 

func (l Level) Enabled(lvl Level) bool

Enabled returns true if the given level is at or above this level.

func (Level) String 

func (l Level) String() string

String returns logger level string representation

type LogFunc added in v3.4.6 

type LogFunc func(ctx context.Context, level Level, args ...interface{})

LogFunc function used for Log method

type LogfFunc added in v3.4.6 

type LogfFunc func(ctx context.Context, level Level, msg string, args ...interface{})

LogfFunc function used for Logf method

type Logger 

type Logger interface {
	// Init initialises options
	Init(opts ...Option) error
	// V compare provided verbosity level with current log level
	V(level Level) bool
	// The Logger options
	Options() Options
	// Fields set fields to always be logged
	Fields(fields map[string]interface{}) Logger
	// Info level message
	Info(ctx context.Context, args ...interface{})
	// Trace level message
	Trace(ctx context.Context, args ...interface{})
	// Debug level message
	Debug(ctx context.Context, args ...interface{})
	// Warn level message
	Warn(ctx context.Context, args ...interface{})
	// Error level message
	Error(ctx context.Context, args ...interface{})
	// Fatal level message
	Fatal(ctx context.Context, args ...interface{})
	// Infof level message
	Infof(ctx context.Context, msg string, args ...interface{})
	// Tracef level message
	Tracef(ctx context.Context, msg string, args ...interface{})
	// Debug level message
	Debugf(ctx context.Context, msg string, args ...interface{})
	// Warn level message
	Warnf(ctx context.Context, msg string, args ...interface{})
	// Error level message
	Errorf(ctx context.Context, msg string, args ...interface{})
	// Fatal level message
	Fatalf(ctx context.Context, msg string, args ...interface{})
	// Log logs message with needed level
	Log(ctx context.Context, level Level, args ...interface{})
	// Logf logs message with needed level
	Logf(ctx context.Context, level Level, msg string, args ...interface{})
	// String returns the name of logger
	String() string
}

Logger is a generic logging interface

func Fields 

func Fields(fields map[string]interface{}) Logger

Fields create logger with specific fields

func FromContext 

func FromContext(ctx context.Context) (Logger, bool)

FromContext returns logger from passed context

func NewLogger 

func NewLogger(opts ...Option) Logger

NewLogger builds a new logger based on options

func NewOmitLogger added in v3.4.7 

func NewOmitLogger(l Logger) Logger

type OmitLogger added in v3.4.7 

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

func (*OmitLogger) Debug added in v3.4.7 

func (w *OmitLogger) Debug(ctx context.Context, args ...interface{})

func (*OmitLogger) Debugf added in v3.4.7 

func (w *OmitLogger) Debugf(ctx context.Context, msg string, args ...interface{})

func (*OmitLogger) Error added in v3.4.7 

func (w *OmitLogger) Error(ctx context.Context, args ...interface{})

func (*OmitLogger) Errorf added in v3.4.7 

func (w *OmitLogger) Errorf(ctx context.Context, msg string, args ...interface{})

func (*OmitLogger) Fatal added in v3.4.7 

func (w *OmitLogger) Fatal(ctx context.Context, args ...interface{})

func (*OmitLogger) Fatalf added in v3.4.7 

func (w *OmitLogger) Fatalf(ctx context.Context, msg string, args ...interface{})

func (*OmitLogger) Fields added in v3.4.7 

func (w *OmitLogger) Fields(fields map[string]interface{}) Logger

func (*OmitLogger) Info added in v3.4.7 

func (w *OmitLogger) Info(ctx context.Context, args ...interface{})

func (*OmitLogger) Infof added in v3.4.7 

func (w *OmitLogger) Infof(ctx context.Context, msg string, args ...interface{})

func (*OmitLogger) Init added in v3.4.7 

func (w *OmitLogger) Init(opts ...Option) error

func (*OmitLogger) Log added in v3.4.7 

func (w *OmitLogger) Log(ctx context.Context, level Level, args ...interface{})

func (*OmitLogger) Logf added in v3.4.7 

func (w *OmitLogger) Logf(ctx context.Context, level Level, msg string, args ...interface{})

func (*OmitLogger) Options added in v3.4.7 

func (w *OmitLogger) Options() Options

func (*OmitLogger) String added in v3.4.7 

func (w *OmitLogger) String() string

func (*OmitLogger) Trace added in v3.4.7 

func (w *OmitLogger) Trace(ctx context.Context, args ...interface{})

func (*OmitLogger) Tracef added in v3.4.7 

func (w *OmitLogger) Tracef(ctx context.Context, msg string, args ...interface{})

func (*OmitLogger) V added in v3.4.7 

func (w *OmitLogger) V(level Level) bool

func (*OmitLogger) Warn added in v3.4.7 

func (w *OmitLogger) Warn(ctx context.Context, args ...interface{})

func (*OmitLogger) Warnf added in v3.4.7 

func (w *OmitLogger) Warnf(ctx context.Context, msg string, args ...interface{})

type OmitWrapper added in v3.4.6 

type OmitWrapper struct{}

func (*OmitWrapper) Log added in v3.4.6 

func (w *OmitWrapper) Log(fn LogFunc) LogFunc

func (*OmitWrapper) Logf added in v3.4.6 

func (w *OmitWrapper) Logf(fn LogfFunc) LogfFunc

type Option 

type Option func(*Options)

Option func

func SetOption 

func SetOption(k, v interface{}) Option

SetOption returns a function to setup a context with given value

func WithCallerSkipCount 

func WithCallerSkipCount(c int) Option

WithCallerSkipCount set frame count to skip

func WithContext 

func WithContext(ctx context.Context) Option

WithContext set context

func WithFields 

func WithFields(fields map[string]interface{}) Option

WithFields set default fields for the logger

func WithLevel 

func WithLevel(level Level) Option

WithLevel set default level for the logger

func WithName added in v3.3.17 

func WithName(n string) Option

WithName sets the name

func WithOutput 

func WithOutput(out io.Writer) Option

WithOutput set default output writer for the logger

func WrapLogger added in v3.4.6 

func WrapLogger(w Wrapper) Option

WrapLogger adds a logger Wrapper to a list of options passed into the logger

type Options 

type Options struct {
	// Out holds the output writer
	Out io.Writer
	// Context holds exernal options
	Context context.Context
	// Fields holds additional metadata
	Fields map[string]interface{}
	// Name holds the logger name
	Name string
	// CallerSkipCount number of frmaes to skip
	CallerSkipCount int
	// The logging level the logger should log
	Level Level
	// Wrappers logger wrapper that called before actual Log/Logf function
	Wrappers []Wrapper
}

Options holds logger options

func NewOptions 

func NewOptions(opts ...Option) Options

NewOptions creates new options struct

type Wrapper added in v3.4.6 

type Wrapper interface {
	// Log logs message with needed level
	Log(LogFunc) LogFunc
	// Logf logs message with needed level
	Logf(LogfFunc) LogfFunc
}

func NewOmitWrapper added in v3.4.6 

func NewOmitWrapper() Wrapper

Source Files

View all Source files

Directories

Path Synopsis
Package wrapper provides wrapper for Logger
 Package wrapper provides wrapper for Logger

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