logger

package
v5.0.0+incompatible Latest Latest
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 Go to latest Published: Feb 20, 2018 License: GPL-3.0 Imports: 17 Imported by: 0

Documentation

Overview

Package logger implements a multi-output leveled logger.

Other packages use tagged logger to send log messages to shared (process-wide) logging engine. The shared logging engine dispatches to multiple log systems. The log level can be set separately per log system.

Logging is asynchronous and does not block the caller. Message formatting is performed by the caller goroutine to avoid incorrect logging of mutable state.

Index

Examples

Constants

View Source 
const (
	Error = iota + 1
	Warn
	Info
	Core
	Debug
	Detail

	Ridiculousness = 100
)
View Source 
const (
	MLOGJSON mlogFormatT
)

Variables

View Source 
var (
	ErrUnkownMLogFormat = errors.New("unknown mlog format")

	// MLogRegistryAvailable contains all available mlog components submitted by any package
	// with MLogRegisterAvailable.
	MLogRegistryAvailable = make(map[mlogComponent][]MLogT)
	// MLogRegistryActive contains all registered mlog component and their respective loggers.
	MLogRegistryActive = make(map[mlogComponent]*Logger)

	MLogStringToFormat = map[string]mlogFormatT{
		"plain": mLOGPlain,
		"kv":    mLOGKV,
		"json":  MLOGJSON,
	}
)

Functions

func AddLogSystem 

func AddLogSystem(sys LogSystem)

AddLogSystem starts printing messages to the given LogSystem.

func ColorBlue 

func ColorBlue(s string) (coloredString string)

func ColorGreen 

func ColorGreen(s string) (coloredString string)

func ColorMagenta 

func ColorMagenta(s string) (coloredString string)

func ColorRed 

func ColorRed(s string) (coloredString string)

func ColorYellow 

func ColorYellow(s string) (coloredString string)

func CreateMLogFile 

func CreateMLogFile(t time.Time) (f *os.File, filename string, err error)

CreateMLogFile creates a new log file and returns the file and its filename, which contains tag ("INFO", "FATAL", etc.) and t. If the file is created successfully, create also attempts to update the symlink for that tag, ignoring errors.

func Flush 

func Flush()

Flush waits until all current log messages have been dispatched to the active log systems.

func GetMLogDir 

func GetMLogDir() string

func GetMLogFormat 

func GetMLogFormat() mlogFormatT

func MLogRegisterActive 

func MLogRegisterActive(component mlogComponent)

MLogRegisterActive registers a component for mlogging. Only registered loggers will write to mlog file.

func MLogRegisterAvailable 

func MLogRegisterAvailable(name string, lines []MLogT) mlogComponent

MLogRegisterAvailable is called for each log component variable from a package/mlog.go file as they set up their mlog vars. It registers an mlog component as Available.

func MLogRegisterComponentsFromContext 

func MLogRegisterComponentsFromContext(s string) error

MLogRegisterComponentsFromContext receives a comma-separated string of desired mlog components. It returns an error if the specified mlog component is unavailable. For each available component, the desires mlog components are registered as active, creating new loggers for each.

func MlogEnabled 

func MlogEnabled() bool

func Reset 

func Reset()

Reset removes all active log systems. It blocks until all current messages have been delivered.

func SetMLogDir 

func SetMLogDir(str string)

SetMLogDir sets the mlog directory, into which one mlog file per session will be written.

func SetMLogFormat 

func SetMLogFormat(format mlogFormatT)

func SetMLogFormatFromString 

func SetMLogFormatFromString(formatString string) error

func SetMlogEnabled 

func SetMlogEnabled(b bool) bool

Getters.

Types

type EthChainNewHead 

type EthChainNewHead struct {
	BlockHash     string   `json:"block_hash"`
	BlockNumber   *big.Int `json:"block_number"`
	ChainHeadHash string   `json:"chain_head_hash"`
	BlockPrevHash string   `json:"block_prev_hash"`
	LogEvent
}

func (*EthChainNewHead) EventName 

func (l *EthChainNewHead) EventName() string

type EthChainReceivedNewBlock 

type EthChainReceivedNewBlock struct {
	BlockHash     string   `json:"block_hash"`
	BlockNumber   *big.Int `json:"block_number"`
	ChainHeadHash string   `json:"chain_head_hash"`
	BlockPrevHash string   `json:"block_prev_hash"`
	RemoteId      string   `json:"remote_id"`
	LogEvent
}

func (*EthChainReceivedNewBlock) EventName 

func (l *EthChainReceivedNewBlock) EventName() string

type EthMinerNewBlock 

type EthMinerNewBlock struct {
	BlockHash     string   `json:"block_hash"`
	BlockNumber   *big.Int `json:"block_number"`
	ChainHeadHash string   `json:"chain_head_hash"`
	BlockPrevHash string   `json:"block_prev_hash"`
	LogEvent
}

func (*EthMinerNewBlock) EventName 

func (l *EthMinerNewBlock) EventName() string

type EthTxReceived 

type EthTxReceived struct {
	TxHash   string `json:"tx_hash"`
	RemoteId string `json:"remote_id"`
	LogEvent
}

func (*EthTxReceived) EventName 

func (l *EthTxReceived) EventName() string

type JsonLog 

type JsonLog interface {
	EventName() string
}

type JsonLogger 

type JsonLogger struct {
	Coinbase string
}

func NewJsonLogger 

func NewJsonLogger() *JsonLogger

func (*JsonLogger) LogJson 

func (logger *JsonLogger) LogJson(v JsonLog)

type LogEvent 

type LogEvent struct {
	// Guid string      `json:"guid"`
	Ts utctime8601 `json:"ts"`
}

type LogLevel 

type LogLevel uint32
const (
	// Standard log levels
	Silence LogLevel = iota
	ErrorLevel
	WarnLevel
	InfoLevel
	DebugLevel
	DebugDetailLevel
)

type LogMsg 

type LogMsg interface {
	Level() LogLevel
	fmt.Stringer
}

type LogStarting 

type LogStarting struct {
	ClientString    string `json:"client_impl"`
	ProtocolVersion int    `json:"eth_version"`
	LogEvent
}

func (*LogStarting) EventName 

func (l *LogStarting) EventName() string

type LogSystem 

type LogSystem interface {
	LogPrint(LogMsg)
}

LogSystem is implemented by log output devices. All methods can be called concurrently from multiple goroutines.

Example 
filename := "test.log"
file, _ := os.OpenFile(filename, os.O_RDWR|os.O_CREATE, os.ModePerm)
fileLog := NewStdLogSystem(file, 0, WarnLevel)
AddLogSystem(fileLog)

stdoutLog := NewStdLogSystem(os.Stdout, 0, WarnLevel)
AddLogSystem(stdoutLog)

NewLogger("TAG").Warnln("reactor meltdown") // writes to both logs

Output:

func BuildNewMLogSystem 

func BuildNewMLogSystem(datadir string, logFile string, logLevel int, flags int, withTimestamp bool) LogSystem

func New 

func New(datadir string, logFile string, logLevel int, flags int) LogSystem

func NewJSONsystem 

func NewJSONsystem(datadir string, logFile string) LogSystem

func NewJsonLogSystem 

func NewJsonLogSystem(writer io.Writer) LogSystem

NewJSONLogSystem creates a LogSystem that prints to the given writer without adding extra information irrespective of loglevel only if message is JSON type

type Logger 

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

A Logger prints messages prefixed by a given tag. It provides named Printf and Println style methods for all loglevels. Each ethereum component should have its own logger with a unique prefix.

Example 
logger := NewLogger("TAG")
logger.Infoln("so awesome")            // prints [TAG] so awesome
logger.Infof("this %q is raw", "coin") // prints [TAG] this "coin" is raw

Output:

func NewLogger 

func NewLogger(tag string) *Logger

func (*Logger) DebugDetailf 

func (logger *Logger) DebugDetailf(format string, v ...interface{})

DebugDetailf writes a message with DebugDetailLevel.

func (*Logger) DebugDetailln 

func (logger *Logger) DebugDetailln(v ...interface{})

DebugDetailln writes a message with DebugDetailLevel.

func (*Logger) Debugf 

func (logger *Logger) Debugf(format string, v ...interface{})

Debugf writes a message with DebugLevel.

func (*Logger) Debugln 

func (logger *Logger) Debugln(v ...interface{})

Debugln writes a message with DebugLevel.

func (*Logger) Errorf 

func (logger *Logger) Errorf(format string, v ...interface{})

Errorf writes a message with ErrorLevel.

func (*Logger) Errorln 

func (logger *Logger) Errorln(v ...interface{})

Errorln writes a message with ErrorLevel.

func (*Logger) Fatalf 

func (logger *Logger) Fatalf(format string, v ...interface{})

Fatalf writes a message with ErrorLevel and exits the program.

func (*Logger) Fatalln 

func (logger *Logger) Fatalln(v ...interface{})

Fatalln writes a message with ErrorLevel and exits the program.

func (*Logger) GetTag 

func (logger *Logger) GetTag() string

GetTag is a getter function to expose the logger's tag

func (*Logger) Infof 

func (logger *Logger) Infof(format string, v ...interface{})

Infof writes a message with InfoLevel.

func (*Logger) Infoln 

func (logger *Logger) Infoln(v ...interface{})

Infoln writes a message with InfoLevel.

func (*Logger) SendFormatted 

func (l *Logger) SendFormatted(format mlogFormatT, level LogLevel, msg *MLogT)

func (*Logger) Sendf 

func (logger *Logger) Sendf(level LogLevel, format string, v ...interface{})

func (*Logger) Sendln 

func (logger *Logger) Sendln(level LogLevel, v ...interface{})

func (*Logger) Warnf 

func (logger *Logger) Warnf(format string, v ...interface{})

Warnf writes a message with WarnLevel.

func (*Logger) Warnln 

func (logger *Logger) Warnln(v ...interface{})

Warnln writes a message with WarnLevel.

type MLogDetailT 

type MLogDetailT struct {
	Owner string      `json:"owner"`
	Key   string      `json:"key"`
	Value interface{} `json:"value"`
}

MLogDetailT defines an mlog LINE DETAILS

func (*MLogDetailT) AsDocumentation 

func (m *MLogDetailT) AsDocumentation() *MLogDetailT

func (*MLogDetailT) EventName 

func (m *MLogDetailT) EventName() string

type MLogSystem 

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

func NewMLogSystem 

func NewMLogSystem(writer io.Writer, flags int, level LogLevel, withTimestamp bool) *MLogSystem

func (*MLogSystem) GetLogLevel 

func (m *MLogSystem) GetLogLevel() LogLevel

func (*MLogSystem) LogPrint 

func (m *MLogSystem) LogPrint(msg LogMsg)

type MLogT 

type MLogT struct {
	sync.Mutex
	Description string        `json:"-"`
	Receiver    string        `json:"receiver"`
	Verb        string        `json:"verb"`
	Subject     string        `json:"subject"`
	Details     []MLogDetailT `json:"details"`
}

MLogT defines an mlog LINE

func (*MLogT) AssignDetails 

func (m *MLogT) AssignDetails(detailVals ...interface{}) *MLogT

AssignDetails is a setter function for setting values for pre-existing details. It accepts a variadic number of empty interfaces. If the number of arguments does not match the number of established details for the receiving MLogT, it will fatal error. Arguments MUST be provided in the order in which they should be applied to the slice of existing details.

func (*MLogT) EventName 

func (m *MLogT) EventName() string

EventName implements the JsonMsg interface in case wanting to use existing half-established json logging system

func (*MLogT) FormatDocumentation 

func (m *MLogT) FormatDocumentation(cmp mlogComponent) (out string)

FormatDocumentation prints wiki-ready documentation for all available component mlog LINES. Output should be in markdown.

func (*MLogT) FormatJSON 

func (m *MLogT) FormatJSON() []byte

func (*MLogT) FormatJSONExample 

func (m *MLogT) FormatJSONExample() []byte

func (*MLogT) FormatKV 

func (m *MLogT) FormatKV() (out string)

func (*MLogT) FormatPlain 

func (m *MLogT) FormatPlain() (out string)

func (*MLogT) FormatUsage 

func (m *MLogT) FormatUsage() (out string)

Format usage print available mlog vars formatted for stderr help/usage instructions.

func (*MLogT) MarshalJSON 

func (m *MLogT) MarshalJSON() ([]byte, error)

func (*MLogT) Send 

func (msg *MLogT) Send(c mlogComponent)

SendMLog writes enabled component mlogs to file if the component is registered active.

type P2PConnected 

type P2PConnected struct {
	RemoteId            string `json:"remote_id"`
	RemoteAddress       string `json:"remote_addr"`
	RemoteVersionString string `json:"remote_version_string"`
	NumConnections      int    `json:"num_connections"`
	LogEvent
}

func (*P2PConnected) EventName 

func (l *P2PConnected) EventName() string

type P2PDisconnected 

type P2PDisconnected struct {
	NumConnections int    `json:"num_connections"`
	RemoteId       string `json:"remote_id"`
	LogEvent
}

func (*P2PDisconnected) EventName 

func (l *P2PDisconnected) EventName() string

type StdLogSystem 

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

func NewStdLogSystem 

func NewStdLogSystem(writer io.Writer, flags int, level LogLevel) *StdLogSystem

NewStdLogSystem creates a LogSystem that prints to the given writer. The flag values are defined package log.

func (*StdLogSystem) GetLogLevel 

func (t *StdLogSystem) GetLogLevel() LogLevel

func (*StdLogSystem) LogPrint 

func (t *StdLogSystem) LogPrint(msg LogMsg)

func (*StdLogSystem) SetLogLevel 

func (t *StdLogSystem) SetLogLevel(i LogLevel)

Source Files

View all Source files

Directories

Path Synopsis
Package glog implements logging analogous to the Google-internal C++ INFO/ERROR/V setup.
 Package glog implements logging analogous to the Google-internal C++ INFO/ERROR/V setup.

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