nanozap

package module
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Published: May 1, 2021 License: MIT Imports: 11 Imported by: 2

README

nanozap

Nanozap is a nanosecond scale logging system for Go based on uber-go/zap.

zap provides stable & robust foundation, it easy to drop modules that we don't need, and the remaining parts are still working well.

It's designed for Zai with these changes:

  1. no console encoder

  2. use nanaoseconds as time

  3. float64 replace by int64 in epochTimeEncoder

  4. no stack

  5. no caller

  6. no error output in Logger

  7. no Any Type

  8. remove fields support, only message

  9. no options (no logger clone too)

  10. remove DPanicLevel

  11. no logger name

  12. async logger write

  13. no sampler

  14. add an internal log rolling package

Avg. latency is 30ns/op. (6x faster)

WIP

  1. refine codes

Documentation

Overview

Package randring provides a ring buckets for multi-producer & one-consumer which will drop messages if buckets full and won't guarantee order. randring only cares about memory corruption.

Index

Constants

View Source
const (
	// DebugLevel logs are typically voluminous, and are usually disabled in
	// production.
	DebugLevel = zapcore.DebugLevel
	// InfoLevel is the default logging priority.
	InfoLevel = zapcore.InfoLevel
	// WarnLevel logs are more important than Info, but don't need individual
	// human review.
	WarnLevel = zapcore.WarnLevel
	// ErrorLevel logs are high-priority. If an application is running smoothly,
	// it shouldn't generate any error-level logs.
	ErrorLevel = zapcore.ErrorLevel
	// PanicLevel logs a message, then panics.
	PanicLevel = zapcore.PanicLevel
	// FatalLevel logs a message, then calls os.Exit(1).
	FatalLevel = zapcore.FatalLevel
)

Variables

This section is empty.

Functions

This section is empty.

Types

type AtomicLevel

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

An AtomicLevel is an atomically changeable, dynamic logging level. It lets you safely change the log level of a tree of loggers (the root logger and any children created by adding context) at runtime.

The AtomicLevel itself is an http.Handler that serves a JSON endpoint to alter its level.

AtomicLevels must be created with the NewAtomicLevel constructor to allocate their internal atomic pointer.

func NewAtomicLevel

func NewAtomicLevel() AtomicLevel

NewAtomicLevel creates an AtomicLevel with InfoLevel and above logging enabled.

func NewAtomicLevelAt

func NewAtomicLevelAt(l zapcore.Level) AtomicLevel

NewAtomicLevelAt is a convenience function that creates an AtomicLevel and then calls SetLevel with the given level.

func (AtomicLevel) Enabled

func (lvl AtomicLevel) Enabled(l zapcore.Level) bool

Enabled implements the zapcore.LevelEnabler interface, which allows the AtomicLevel to be used in place of traditional static levels.

func (AtomicLevel) Level

func (lvl AtomicLevel) Level() zapcore.Level

Level returns the minimum enabled log level.

func (AtomicLevel) MarshalText

func (lvl AtomicLevel) MarshalText() (text []byte, err error)

MarshalText marshals the AtomicLevel to a byte slice. It uses the same text representation as the static zapcore.Levels ("debug", "info", "warn", "error", "dpanic", "panic", and "fatal").

func (AtomicLevel) SetLevel

func (lvl AtomicLevel) SetLevel(l zapcore.Level)

SetLevel alters the logging level.

func (AtomicLevel) String

func (lvl AtomicLevel) String() string

String returns the string representation of the underlying Level.

func (*AtomicLevel) UnmarshalText

func (lvl *AtomicLevel) UnmarshalText(text []byte) error

UnmarshalText unmarshals the text to an AtomicLevel. It uses the same text representations as the static zapcore.Levels ("debug", "info", "warn", "error", "dpanic", "panic", and "fatal").

type Field

type Field = zapcore.Field

Field is an alias for Field. Aliasing this type dramatically improves the navigability of this package's API documentation.

func Array

func Array(key string, val zapcore.ArrayMarshaler) Field

Array constructs a field with the given key and ArrayMarshaler. It provides a flexible, but still type-safe and efficient, way to add array-like types to the logging context. The struct's MarshalLogArray method is called lazily.

func Binary

func Binary(key string, val []byte) Field

Binary constructs a field that carries an opaque binary blob.

Binary data is serialized in an encoding-appropriate format. For example, zap's JSON encoder base64-encodes binary blobs. To log UTF-8 encoded text, use ByteString.

func Bool

func Bool(key string, val bool) Field

Bool constructs a field that carries a bool.

func Bools

func Bools(key string, bs []bool) Field

Bools constructs a field that carries a slice of bools.

func ByteString

func ByteString(key string, val []byte) Field

ByteString constructs a field that carries UTF-8 encoded text as a []byte. To log opaque binary blobs (which aren't necessarily valid UTF-8), use Binary.

func ByteStrings

func ByteStrings(key string, bss [][]byte) Field

ByteStrings constructs a field that carries a slice of []byte, each of which must be UTF-8 encoded text.

func Complex128

func Complex128(key string, val complex128) Field

Complex128 constructs a field that carries a complex number. Unlike most numeric fields, this costs an allocation (to convert the complex128 to interface{}).

func Complex128s

func Complex128s(key string, nums []complex128) Field

Complex128s constructs a field that carries a slice of complex numbers.

func Complex64

func Complex64(key string, val complex64) Field

Complex64 constructs a field that carries a complex number. Unlike most numeric fields, this costs an allocation (to convert the complex64 to interface{}).

func Complex64s

func Complex64s(key string, nums []complex64) Field

Complex64s constructs a field that carries a slice of complex numbers.

func Duration

func Duration(key string, val time.Duration) Field

Duration constructs a field with the given key and value. The encoder controls how the duration is serialized.

func Durations

func Durations(key string, ds []time.Duration) Field

Durations constructs a field that carries a slice of time.Durations.

func Error

func Error(err error) Field

Error is shorthand for the common idiom NamedError("error", err).

func Errors

func Errors(key string, errs []error) Field

Errors constructs a field that carries a slice of errors.

func Float32

func Float32(key string, val float32) Field

Float32 constructs a field that carries a float32. The way the floating-point value is represented is encoder-dependent, so marshaling is necessarily lazy.

func Float32s

func Float32s(key string, nums []float32) Field

Float32s constructs a field that carries a slice of floats.

func Float64

func Float64(key string, val float64) Field

Float64 constructs a field that carries a float64. The way the floating-point value is represented is encoder-dependent, so marshaling is necessarily lazy.

func Float64s

func Float64s(key string, nums []float64) Field

Float64s constructs a field that carries a slice of floats.

func Int

func Int(key string, val int) Field

Int constructs a field with the given key and value.

func Int16

func Int16(key string, val int16) Field

Int16 constructs a field with the given key and value.

func Int16s

func Int16s(key string, nums []int16) Field

Int16s constructs a field that carries a slice of integers.

func Int32

func Int32(key string, val int32) Field

Int32 constructs a field with the given key and value.

func Int32s

func Int32s(key string, nums []int32) Field

Int32s constructs a field that carries a slice of integers.

func Int64

func Int64(key string, val int64) Field

Int64 constructs a field with the given key and value.

func Int64s

func Int64s(key string, nums []int64) Field

Int64s constructs a field that carries a slice of integers.

func Int8

func Int8(key string, val int8) Field

Int8 constructs a field with the given key and value.

func Int8s

func Int8s(key string, nums []int8) Field

Int8s constructs a field that carries a slice of integers.

func Ints

func Ints(key string, nums []int) Field

Ints constructs a field that carries a slice of integers.

func NamedError

func NamedError(key string, err error) Field

NamedError constructs a field that lazily stores err.Error() under the provided key. Errors which also implement fmt.Formatter (like those produced by github.com/pkg/errors) will also have their verbose representation stored under key+"Verbose". If passed a nil error, the field is a no-op.

For the common case in which the key is simply "error", the Error function is shorter and less repetitive.

func Namespace

func Namespace(key string) Field

Namespace creates a named, isolated scope within the logger's context. All subsequent fields will be added to the new namespace.

This helps prevent key collisions when injecting loggers into sub-components or third-party libraries.

func Object

func Object(key string, val zapcore.ObjectMarshaler) Field

Object constructs a field with the given key and ObjectMarshaler. It provides a flexible, but still type-safe and efficient, way to add map- or struct-like user-defined types to the logging context. The struct's MarshalLogObject method is called lazily.

func Reflect

func Reflect(key string, val interface{}) Field

Reflect constructs a field with the given key and an arbitrary object. It uses an encoding-appropriate, reflection-based function to lazily serialize nearly any object into the logging context, but it's relatively slow and allocation-heavy. Outside tests, Any is always a better choice.

If encoding fails (e.g., trying to serialize a map[int]string to JSON), Reflect includes the error message in the final log output.

func Skip

func Skip() Field

Skip constructs a no-op field, which is often useful when handling invalid inputs in other Field constructors.

func String

func String(key string, val string) Field

String constructs a field with the given key and value.

func Stringer

func Stringer(key string, val fmt.Stringer) Field

Stringer constructs a field with the given key and the output of the value's String method. The Stringer's String method is called lazily.

func Strings

func Strings(key string, ss []string) Field

Strings constructs a field that carries a slice of strings.

func Time

func Time(key string, val int64) Field

Time constructs a Field with the given key and value. The encoder controls how the time is serialized.

func Times

func Times(key string, ts []time.Time) Field

Times constructs a field that carries a slice of time.Times.

func Uint

func Uint(key string, val uint) Field

Uint constructs a field with the given key and value.

func Uint16

func Uint16(key string, val uint16) Field

Uint16 constructs a field with the given key and value.

func Uint16s

func Uint16s(key string, nums []uint16) Field

Uint16s constructs a field that carries a slice of unsigned integers.

func Uint32

func Uint32(key string, val uint32) Field

Uint32 constructs a field with the given key and value.

func Uint32s

func Uint32s(key string, nums []uint32) Field

Uint32s constructs a field that carries a slice of unsigned integers.

func Uint64

func Uint64(key string, val uint64) Field

Uint64 constructs a field with the given key and value.

func Uint64s

func Uint64s(key string, nums []uint64) Field

Uint64s constructs a field that carries a slice of unsigned integers.

func Uint8

func Uint8(key string, val uint8) Field

Uint8 constructs a field with the given key and value.

func Uint8s

func Uint8s(key string, nums []uint8) Field

Uint8s constructs a field that carries a slice of unsigned integers.

func Uintptr

func Uintptr(key string, val uintptr) Field

Uintptr constructs a field with the given key and value.

func Uintptrs

func Uintptrs(key string, us []uintptr) Field

Uintptrs constructs a field that carries a slice of pointer addresses.

func Uints

func Uints(key string, nums []uint) Field

Uints constructs a field that carries a slice of unsigned integers.

type LevelEnablerFunc

type LevelEnablerFunc func(zapcore.Level) bool

LevelEnablerFunc is a convenient way to implement zapcore.LevelEnabler with an anonymous function.

It's particularly useful when splitting log output between different outputs (e.g., standard error and standard out). For sample code, see the package-level AdvancedConfiguration example.

func (LevelEnablerFunc) Enabled

func (f LevelEnablerFunc) Enabled(lvl zapcore.Level) bool

Enabled calls the wrapped function.

type Logger

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

For nanozap, the random order only happens when there is a flood, and random order logs won't cause serious issues.

func New

func New(core zapcore.Core) *Logger

New constructs a new Logger from the provided zapcore.Core. If the passed zapcore.Core is nil, it panic.

func (*Logger) Close

func (log *Logger) Close()

Close close Logger background loop. Without guarantee anything except exiting loop.

func (*Logger) Core

func (log *Logger) Core() zapcore.Core

Core returns the Logger's underlying zapcore.Core.

func (*Logger) Debug

func (log *Logger) Debug(reqid uint64, msg string)

Debug logs a message at DebugLevel.

func (*Logger) Debugf

func (log *Logger) Debugf(reqid uint64, format string, args ...interface{})

func (*Logger) Error

func (log *Logger) Error(reqid uint64, msg string)

Error logs a message at ErrorLevel.

func (*Logger) Errorf

func (log *Logger) Errorf(reqid uint64, format string, args ...interface{})

func (*Logger) Fatal

func (log *Logger) Fatal(reqid uint64, msg string)

Fatal logs a message at FatalLevel.

The logger then calls os.Exit(1), even if logging at FatalLevel is disabled.

func (*Logger) Fatalf

func (log *Logger) Fatalf(reqid uint64, format string, args ...interface{})

func (*Logger) Info

func (log *Logger) Info(reqid uint64, msg string)

Info logs a message at InfoLevel.

func (*Logger) Infof

func (log *Logger) Infof(reqid uint64, format string, args ...interface{})

func (*Logger) Panic

func (log *Logger) Panic(reqid uint64, msg string)

Panic logs a message at PanicLevel. T

The logger then panics, even if logging at PanicLevel is disabled.

func (*Logger) Panicf

func (log *Logger) Panicf(reqid uint64, format string, args ...interface{})

func (*Logger) Sync

func (log *Logger) Sync() error

Sync calls the underlying Core's Sync method, flushing any buffered log entries. Applications should take care to call Sync before exiting.

func (*Logger) Warn

func (log *Logger) Warn(reqid uint64, msg string)

Warn logs a message at WarnLevel.

func (*Logger) Warnf

func (log *Logger) Warnf(reqid uint64, format string, args ...interface{})

type Ring

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

Ring provides a ring buckets for multi-producer & one-consumer.

func (*Ring) Push

func (r *Ring) Push(data unsafe.Pointer)

Push puts the data in ring in the next bucket no matter what in it.

func (*Ring) TryPop

func (r *Ring) TryPop() (unsafe.Pointer, bool)

TryPop tries to pop data from the next bucket, return (nil, false) if no data available.

Directories

Path Synopsis
Package buffer provides a thin wrapper around a byte slice.
Package buffer provides a thin wrapper around a byte slice.
zaproll provides a rolling logger for nanozap.
zaproll provides a rolling logger for nanozap.
internal
bufferpool
Package bufferpool houses zap's shared internal buffer pool.
Package bufferpool houses zap's shared internal buffer pool.

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