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 Go to latest Published: Jul 19, 2022 License: MIT Imports: 8 Imported by: 46

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Constants

View Source 
const (
	// AppMajor defines the major version of this binary.
	AppMajor uint = 0

	// AppMinor defines the minor version of this binary.
	AppMinor uint = 14

	// AppPatch defines the application patch for this binary.
	AppPatch uint = 2

	// AppPreRelease MUST only contain characters from semanticAlphabet
	// per the semantic versioning spec.
	AppPreRelease = "beta"
)

These constants define the application version and follow the semantic versioning 2.0.0 spec (http://semver.org/).

View Source 
const Deployment = Production

Deployment specifies a production build.

View Source 
const LoggingType = LogTypeDefault

LoggingType is a log type that writes to both stdout and the log rotator, if present.

Variables

View Source 
var (
	// Commit stores the current commit of this build, which includes the
	// most recent tag, the number of commits since that tag (if non-zero),
	// the commit hash, and a dirty marker. This should be set using the
	// -ldflags during compilation.
	Commit string

	// CommitHash stores the current commit hash of this build, this should
	// be set using the -ldflags during compilation.
	CommitHash string

	// RawTags contains the raw set of build tags, separated by commas. This
	// should be set using -ldflags during compilation.
	RawTags string

	// GoVersion stores the go version that the executable was compiled
	// with. This hsould be set using -ldflags during compilation.
	GoVersion string
)
View Source 
var LogLevel = "info"

LogLevel specifies a default log level of info.

Functions

func IsDevBuild 

func IsDevBuild() bool

IsDevBuild returns true if this is a development build.

func IsProdBuild 

func IsProdBuild() bool

IsProdBuild returns true if this is a production build.

func NewSubLogger 

func NewSubLogger(subsystem string,
	genSubLogger func(string) btclog.Logger) btclog.Logger

NewSubLogger constructs a new subsystem log from the current LogWriter implementation. This is primarily intended for use with stdlog, as the actual writer is shared amongst all instantiations.

func ParseAndSetDebugLevels 

func ParseAndSetDebugLevels(level string, logger LeveledSubLogger) error

ParseAndSetDebugLevels attempts to parse the specified debug level and set the levels accordingly on the given logger. An appropriate error is returned if anything is invalid.

func Tags 

func Tags() []string

Tags returns the list of build tags that were compiled into the executable.

func Version 

func Version() string

Version returns the application version as a properly formed string per the semantic versioning 2.0.0 spec (http://semver.org/).

Types

type DeploymentType 

type DeploymentType byte

DeploymentType is an enum specifying the deployment to compile. 

const (
	// Development is a deployment that includes extra testing hooks and
	// logging configurations.
	Development DeploymentType = iota

	// Production is a deployment that strips out testing logic and uses
	// Default logging.
	Production
)

func (DeploymentType) String 

func (b DeploymentType) String() string

String returns a human readable name for a build type.

type LeveledSubLogger 

type LeveledSubLogger interface {
	// SubLoggers returns the map of all registered subsystem loggers.
	SubLoggers() SubLoggers

	// SupportedSubsystems returns a slice of strings containing the names
	// of the supported subsystems. Should ideally correspond to the keys
	// of the subsystem logger map and be sorted.
	SupportedSubsystems() []string

	// SetLogLevel assigns an individual subsystem logger a new log level.
	SetLogLevel(subsystemID string, logLevel string)

	// SetLogLevels assigns all subsystem loggers the same new log level.
	SetLogLevels(logLevel string)
}

LeveledSubLogger provides the ability to retrieve the subsystem loggers of a logger and set their log levels individually or all at once.

type LogType 

type LogType byte

LogType is an indicating the type of logging specified by the build flag. 

const (
	// LogTypeNone indicates no logging.
	LogTypeNone LogType = iota

	// LogTypeStdOut all logging is written directly to stdout.
	LogTypeStdOut

	// LogTypeDefault logs to both stdout and a given io.PipeWriter.
	LogTypeDefault
)

func (LogType) String 

func (t LogType) String() string

String returns a human readable identifier for the logging type.

type LogWriter 

type LogWriter struct {
	// RotatorPipe is the write-end pipe for writing to the log rotator.  It
	// is written to by the Write method of the LogWriter type. This only
	// needs to be set if neither the stdlog or nolog builds are set.
	RotatorPipe *io.PipeWriter
}

LogWriter is a stub type whose behavior can be changed using the build flags "stdlog" and "nolog". The default behavior is to write to both stdout and the RotatorPipe. Passing "stdlog" will cause it only to write to stdout, and "nolog" implements Write as a no-op.

func (*LogWriter) Write 

func (w *LogWriter) Write(b []byte) (int, error)

Write writes the byte slice to both stdout and the log rotator, if present.

type PrefixLog 

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

PrefixLog is a pass-through logger that adds a prefix to every logged line.

func NewPrefixLog 

func NewPrefixLog(prefix string, log btclog.Logger) *PrefixLog

NewPrefixLog instantiates a new prefixed logger.

func (*PrefixLog) Critical 

func (p *PrefixLog) Critical(v ...interface{})

Critical formats message using the default formats for its operands and writes to log with LevelCritical.

func (*PrefixLog) Criticalf 

func (p *PrefixLog) Criticalf(format string, params ...interface{})

Criticalf formats message according to format specifier and writes to log with LevelCritical.

func (*PrefixLog) Debug 

func (p *PrefixLog) Debug(v ...interface{})

Debug formats message using the default formats for its operands and writes to log with LevelDebug.

func (*PrefixLog) Debugf 

func (p *PrefixLog) Debugf(format string, params ...interface{})

Debugf formats message according to format specifier and writes to log with LevelDebug.

func (*PrefixLog) Error 

func (p *PrefixLog) Error(v ...interface{})

Error formats message using the default formats for its operands and writes to log with LevelError.

func (*PrefixLog) Errorf 

func (p *PrefixLog) Errorf(format string, params ...interface{})

Errorf formats message according to format specifier and writes to to log with LevelError.

func (*PrefixLog) Info 

func (p *PrefixLog) Info(v ...interface{})

Info formats message using the default formats for its operands and writes to log with LevelInfo.

func (*PrefixLog) Infof 

func (p *PrefixLog) Infof(format string, params ...interface{})

Infof formats message according to format specifier and writes to log with LevelInfo.

func (*PrefixLog) Level 

func (p *PrefixLog) Level() btclog.Level

Level returns the current logging level.

func (*PrefixLog) SetLevel 

func (p *PrefixLog) SetLevel(level btclog.Level)

SetLevel changes the logging level to the passed level.

func (*PrefixLog) Trace 

func (p *PrefixLog) Trace(v ...interface{})

Trace formats message using the default formats for its operands and writes to log with LevelTrace.

func (*PrefixLog) Tracef 

func (p *PrefixLog) Tracef(format string, params ...interface{})

Tracef formats message according to format specifier and writes to to log with LevelTrace.

func (*PrefixLog) Warn 

func (p *PrefixLog) Warn(v ...interface{})

Warn formats message using the default formats for its operands and writes to log with LevelWarn.

func (*PrefixLog) Warnf 

func (p *PrefixLog) Warnf(format string, params ...interface{})

Warnf formats message according to format specifier and writes to to log with LevelWarn.

type RotatingLogWriter 

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

RotatingLogWriter is a wrapper around the LogWriter that supports log file rotation.

func NewRotatingLogWriter 

func NewRotatingLogWriter() *RotatingLogWriter

NewRotatingLogWriter creates a new file rotating log writer.

NOTE: `InitLogRotator` must be called to set up log rotation after creating the writer.

func (*RotatingLogWriter) Close 

func (r *RotatingLogWriter) Close() error

Close closes the underlying log rotator if it has already been created.

func (*RotatingLogWriter) GenSubLogger 

func (r *RotatingLogWriter) GenSubLogger(tag string, shutdown func()) btclog.Logger

GenSubLogger creates a new sublogger. A shutdown callback function is provided to be able to shutdown in case of a critical error.

func (*RotatingLogWriter) InitLogRotator 

func (r *RotatingLogWriter) InitLogRotator(logFile string, maxLogFileSize int,
	maxLogFiles int) error

InitLogRotator initializes the log file rotator to write logs to logFile and create roll files in the same directory. It should be called as early on startup and possible and must be closed on shutdown by calling `Close`.

func (*RotatingLogWriter) RegisterSubLogger 

func (r *RotatingLogWriter) RegisterSubLogger(subsystem string,
	logger btclog.Logger)

RegisterSubLogger registers a new subsystem logger.

func (*RotatingLogWriter) SetLogLevel 

func (r *RotatingLogWriter) SetLogLevel(subsystemID string, logLevel string)

SetLogLevel sets the logging level for provided subsystem. Invalid subsystems are ignored. Uninitialized subsystems are dynamically created as needed.

NOTE: This is part of the LeveledSubLogger interface.

func (*RotatingLogWriter) SetLogLevels 

func (r *RotatingLogWriter) SetLogLevels(logLevel string)

SetLogLevels sets the log level for all subsystem loggers to the passed level. It also dynamically creates the subsystem loggers as needed, so it can be used to initialize the logging system.

NOTE: This is part of the LeveledSubLogger interface.

func (*RotatingLogWriter) SubLoggers 

func (r *RotatingLogWriter) SubLoggers() SubLoggers

SubLoggers returns all currently registered subsystem loggers for this log writer.

NOTE: This is part of the LeveledSubLogger interface.

func (*RotatingLogWriter) SupportedSubsystems 

func (r *RotatingLogWriter) SupportedSubsystems() []string

SupportedSubsystems returns a sorted string slice of all keys in the subsystems map, corresponding to the names of the subsystems.

NOTE: This is part of the LeveledSubLogger interface.

type ShutdownLogger 

type ShutdownLogger struct {
	btclog.Logger
	// contains filtered or unexported fields
}

ShutdownLogger wraps an existing logger with a shutdown function which will be called on Critical/Criticalf to prompt shutdown.

func NewShutdownLogger 

func NewShutdownLogger(logger btclog.Logger, shutdown func()) *ShutdownLogger

NewShutdownLogger creates a shutdown logger for the log provided which will use the signal package to request shutdown on critical errors.

func (*ShutdownLogger) Critical 

func (s *ShutdownLogger) Critical(v ...interface{})

Critical formats message using the default formats for its operands and writes to log with LevelCritical. It will then call the shutdown logger's shutdown function to prompt safe shutdown.

Note: it is part of the btclog.Logger interface.

func (*ShutdownLogger) Criticalf 

func (s *ShutdownLogger) Criticalf(format string, params ...interface{})

Criticalf formats message according to format specifier and writes to log with LevelCritical. It will then call the shutdown logger's shutdown function to prompt safe shutdown.

Note: it is part of the btclog.Logger interface.

type SubLoggers 

type SubLoggers map[string]btclog.Logger

SubLoggers is a type that holds a map of subsystem loggers keyed by their subsystem name.

Source Files

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