protolog

package module
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 Go to latest Published: Mar 9, 2016 License: MIT Imports: 19 Imported by: 0

README

CircleCI Go Report Card GoDoc MIT License

go get go.pedge.io/protolog

Initial beta release coming soon - I need to do one more pass on this and then document all the functionality.

  • Structured logging with Protocol buffers
  • Child of https://github.com/peter-edge/ledge-go
  • Some compatibility with existing libraries (specifically logrus and glog)
  • Two-way serialization - write logs somewhere, read them back, language independent

Where to poke around

  • protolog.go: all the public definiions
  • protolog.proto: the protos that are serialized over the wire
  • testing*: test compilation of proto definitions
  • benchmark*: more compilation of proto definitions, and benchmarks
  • make test: will print out some logs with the default text marshaller
  • make bench: some basic benchmarks

TODO

  • journal writer?
  • colors in terminals
  • better text formatting/options
  • third-party logs integration
  • performance improvements/testing
  • documentation

Documentation

Overview

Package protolog defines the main protolog functionality.

Index

Constants

This section is empty.

Variables

View Source 
var (
	// DefaultLevel is the default Level.
	DefaultLevel = LevelInfo
	// DefaultIDAllocator is the default IDAllocator.
	DefaultIDAllocator = &idAllocator{instanceID, 0}
	// DefaultTimer is the default Timer.
	DefaultTimer = &timer{}
	// DefaultErrorHandler is the default ErrorHandler.
	DefaultErrorHandler = &errorHandler{}

	// DelimitedMarshaller is a Marshaller that uses the protocol buffers write delimited scheme.
	DelimitedMarshaller = &delimitedMarshaller{}
	// DelimitedUnmarshaller is an Unmarshaller that uses the protocol buffers write delimited scheme.
	DelimitedUnmarshaller = &delimitedUnmarshaller{}

	// DiscardPusher is a Pusher that discards all logs.
	DiscardPusher = discardPusherInstance
	// DiscardLogger is a Logger that discards all logs.
	DiscardLogger = NewLogger(DiscardPusher)

	// DefaultPusher is the default Pusher.
	DefaultPusher = NewTextWritePusher(os.Stderr)
	// DefaultLogger is the default Logger.
	DefaultLogger = NewLogger(DefaultPusher)
)

Functions

func AddGlobalHook 

func AddGlobalHook(globalHook GlobalHook)

AddGlobalHook adds a GlobalHook that will be called any time SetLogger or SetLevel is called. It will also be called when added.

func Debug 

func Debug(Event proto.Message)

Debug calls Debug on the global Logger.

func DebugWriter 

func DebugWriter() io.Writer

DebugWriter calls DebugWriter on the global Logger.

func Debugf 

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

Debugf calls Debugf on the global Logger.

func Debugln 

func Debugln(args ...interface{})

Debugln calls Debugln on the global Logger.

func Error 

func Error(Event proto.Message)

Error calls Error on the global Logger.

func ErrorWriter 

func ErrorWriter() io.Writer

ErrorWriter calls ErrorWriter on the global Logger.

func Errorf 

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

Errorf calls Errorf on the global Logger.

func Errorln 

func Errorln(args ...interface{})

Errorln calls Errorln on the global Logger.

func Fatal 

func Fatal(Event proto.Message)

Fatal calls Fatal on the global Logger.

func Fatalf 

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

Fatalf calls Fatalf on the global Logger.

func Fatalln 

func Fatalln(args ...interface{})

Fatalln calls Fatalln on the global Logger.

func Flush 

func Flush() error

Flush calls Flush on the global Logger.

func Info 

func Info(Event proto.Message)

Info calls Info on the global Logger.

func InfoWriter 

func InfoWriter() io.Writer

InfoWriter calls InfoWriter on the global Logger.

func Infof 

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

Infof calls Infof on the global Logger.

func Infoln 

func Infoln(args ...interface{})

Infoln calls Infoln on the global Logger.

func Panic 

func Panic(Event proto.Message)

Panic calls Panic on the global Logger.

func Panicf 

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

Panicf calls Panicf on the global Logger.

func Panicln 

func Panicln(args ...interface{})

Panicln calls Panicln on the global Logger.

func Print 

func Print(Event proto.Message)

Print calls Print on the global Logger.

func Printf 

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

Printf calls Printf on the global Logger.

func Println 

func Println(args ...interface{})

Println calls Println on the global Logger.

func RedirectStdLogger 

func RedirectStdLogger()

RedirectStdLogger will redirect logs to golang's standard logger to the global Logger instance.

func SetLevel 

func SetLevel(level Level)

SetLevel sets the global Logger to to be at the given Level.

func SetLogger 

func SetLogger(logger Logger)

SetLogger sets the global Logger instance.

func Warn 

func Warn(Event proto.Message)

Warn calls Warn on the global Logger.

func WarnWriter 

func WarnWriter() io.Writer

WarnWriter calls WarnWriter on the global Logger.

func Warnf 

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

Warnf calls Warnf on the global Logger.

func Warnln 

func Warnln(args ...interface{})

Warnln calls Warnln on the global Logger.

func Writer 

func Writer() io.Writer

Writer calls Writer on the global Logger.

Types

type Entry 

type Entry struct {
	// ID may not be set depending on LoggerOptions.
	// it is up to the user to determine if ID is required.
	ID    string    `json:"id,omitempty"`
	Level Level     `json:"level,omitempty"`
	Time  time.Time `json:"time,omitempty"`
	// both Contexts and Fields may be set
	Contexts []proto.Message   `json:"contexts,omitempty"`
	Fields   map[string]string `json:"fields,omitempty"`
	// one of Event, Message, WriterOutput will be set
	Event        proto.Message `json:"event,omitempty"`
	Message      string        `json:"message,omitempty"`
	WriterOutput []byte        `json:"writer_output,omitempty"`
}

Entry is the go equivalent of an Entry.

func (*Entry) String 

func (g *Entry) String() string

String defaults a string representation of the Entry.

type ErrorHandler 

type ErrorHandler interface {
	Handle(err error)
}

ErrorHandler handles errors when logging. The default behavior is to panic.

type Flusher 

type Flusher interface {
	Flush() error
}

Flusher is an object that can be flushed to a persistent store.

type GlobalHook 

type GlobalHook func(Logger)

GlobalHook is a function that handles a change in the global Logger instance.

type IDAllocator 

type IDAllocator interface {
	Allocate() string
}

IDAllocator allocates unique IDs for Entry objects. The default behavior is to allocate a new UUID for the process, then add an incremented integer to the end.

type Level 

type Level int32

Level is a logging level. 

const (
	// LevelNone represents no Level.
	LevelNone Level = 0
	// LevelDebug is the debug Level.
	LevelDebug Level = 1
	// LevelInfo is the info Level.
	LevelInfo Level = 2
	// LevelWarn is the warn Level.
	LevelWarn Level = 3
	// LevelError is the error Level.
	LevelError Level = 4
	// LevelFatal is the fatal Level.
	LevelFatal Level = 5
	// LevelPanic is the panic Level.
	LevelPanic Level = 6
)

func NameToLevel 

func NameToLevel(name string) (Level, error)

NameToLevel returns the Level for the given name.

func (Level) String 

func (l Level) String() string

String returns the name of a Level or the numerical value if the Level is unknown.

type Logger 

type Logger interface {
	Flusher

	AtLevel(level Level) Logger

	WithContext(context proto.Message) Logger
	Debug(event proto.Message)
	Info(event proto.Message)
	Warn(event proto.Message)
	Error(event proto.Message)
	Fatal(event proto.Message)
	Panic(event proto.Message)
	Print(event proto.Message)

	DebugWriter() io.Writer
	InfoWriter() io.Writer
	WarnWriter() io.Writer
	ErrorWriter() io.Writer
	Writer() io.Writer

	WithField(key string, value interface{}) Logger
	WithFields(fields map[string]interface{}) Logger
	Debugf(format string, args ...interface{})
	Debugln(args ...interface{})
	Infof(format string, args ...interface{})
	Infoln(args ...interface{})
	Warnf(format string, args ...interface{})
	Warnln(args ...interface{})
	Errorf(format string, args ...interface{})
	Errorln(args ...interface{})
	Fatalf(format string, args ...interface{})
	Fatalln(args ...interface{})
	Panicf(format string, args ...interface{})
	Panicln(args ...interface{})
	Printf(format string, args ...interface{})
	Println(args ...interface{})
}

Logger is the main logging interface. All methods are also replicated on the package and attached to a global Logger.

func AtLevel 

func AtLevel(level Level) Logger

AtLevel calls AtLevel on the global Logger.

func GlobalLogger 

func GlobalLogger() Logger

GlobalLogger returns the global Logger instance.

func NewLogger 

func NewLogger(pusher Pusher, options ...LoggerOption) Logger

NewLogger constructs a new Logger using the given Pusher.

func WithContext 

func WithContext(context proto.Message) Logger

WithContext calls WithContext on the global Logger.

func WithField 

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

WithField calls WithField on the global Logger.

func WithFields 

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

WithFields calls WithFields on the global Logger.

type LoggerOption 

type LoggerOption func(*logger)

LoggerOption is an option for the Logger constructor.

func LoggerWithErrorHandler 

func LoggerWithErrorHandler(errorHandler ErrorHandler) LoggerOption

LoggerWithErrorHandler uses the ErrorHandler for the Logger.

func LoggerWithIDAllocator 

func LoggerWithIDAllocator(idAllocator IDAllocator) LoggerOption

LoggerWithIDAllocator uses the IDAllocator for the Logger.

func LoggerWithIDEnabled 

func LoggerWithIDEnabled() LoggerOption

LoggerWithIDEnabled enables IDs for the Logger.

func LoggerWithTimer 

func LoggerWithTimer(timer Timer) LoggerOption

LoggerWithTimer uses the Timer for the Logger.

type Marshaller 

type Marshaller interface {
	Marshal(entry *Entry) ([]byte, error)
}

Marshaller marshals Entry objects to be written.

type Puller 

type Puller interface {
	Pull() (*Entry, error)
}

Puller pulls Entry objects from a persistent store.

func NewReadPuller 

func NewReadPuller(reader io.Reader, options ...ReadPullerOption) Puller

NewReadPuller constructs a new Puller that reads from the given Reader.

type Pusher 

type Pusher interface {
	Flusher
	Push(entry *Entry) error
}

Pusher is the interface used to push Entry objects to a persistent store.

func NewMultiPusher 

func NewMultiPusher(pushers ...Pusher) Pusher

NewMultiPusher constructs a new Pusher that calls all the given Pushers.

func NewTextWritePusher 

func NewTextWritePusher(writer io.Writer, textMarshallerOptions ...TextMarshallerOption) Pusher

NewTextWritePusher constructs a new Pusher using a TextMarshaller and newlines.

func NewWritePusher 

func NewWritePusher(writer io.Writer, options ...WritePusherOption) Pusher

NewWritePusher constructs a new Pusher that writes to the given io.Writer.

type ReadPullerOption 

type ReadPullerOption func(*readPuller)

ReadPullerOption is an option for a read Puller.

func ReadPullerWithUnmarshaller 

func ReadPullerWithUnmarshaller(unmarshaller Unmarshaller) ReadPullerOption

ReadPullerWithUnmarshaller uses the Unmarshaller for the read Puller.

By default, DelimitedUnmarshaller is used.

type TextMarshaller 

type TextMarshaller interface {
	Marshaller
	WithColors() TextMarshaller
	WithoutColors() TextMarshaller
}

TextMarshaller is a Marshaller used for text.

func NewTextMarshaller 

func NewTextMarshaller(options ...TextMarshallerOption) TextMarshaller

NewTextMarshaller constructs a new Marshaller that produces human-readable marshalled Entry objects. This Marshaller is currently inefficient.

type TextMarshallerOption 

type TextMarshallerOption func(*textMarshaller)

TextMarshallerOption is an option for creating Marshallers.

func TextMarshallerDisableContexts 

func TextMarshallerDisableContexts() TextMarshallerOption

TextMarshallerDisableContexts will suppress the printing of Entry contexts.

func TextMarshallerDisableLevel 

func TextMarshallerDisableLevel() TextMarshallerOption

TextMarshallerDisableLevel will suppress the printing of Entry Levels.

func TextMarshallerDisableNewlines 

func TextMarshallerDisableNewlines() TextMarshallerOption

TextMarshallerDisableNewlines disables newlines after each marshalled Entry.

func TextMarshallerDisableTime 

func TextMarshallerDisableTime() TextMarshallerOption

TextMarshallerDisableTime will suppress the printing of Entry Timestamps.

type Timer 

type Timer interface {
	Now() time.Time
}

Timer returns the current time. The default behavior is to call time.Now().UTC().

type Unmarshaller 

type Unmarshaller interface {
	Unmarshal(reader io.Reader, entry *Entry) error
}

Unmarshaller unmarshalls a marshalled Entry object. At the end of a stream, Unmarshaller will return io.EOF.

type WritePusherOption 

type WritePusherOption func(*writePusher)

WritePusherOption is an option for constructing a new write Pusher.

func WritePusherWithMarshaller 

func WritePusherWithMarshaller(marshaller Marshaller) WritePusherOption

WritePusherWithMarshaller uses the Marshaller for the write Pusher.

By default, DelimitedMarshaller is used.

Source Files

View all Source files

Directories

Path Synopsis
Package protolog_glog defines functionality for integration with glog.
 Package protolog_glog defines functionality for integration with glog.
Package protolog_logrus defines functionality for integration with Logrus.
 Package protolog_logrus defines functionality for integration with Logrus.
Package protologpb is a generated protocol buffer package.
 Package protologpb is a generated protocol buffer package.
Package protolog_syslog defines functionality for integration with syslog.
 Package protolog_syslog defines functionality for integration with syslog.

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