mirror of
https://github.com/VictoriaMetrics/VictoriaMetrics.git
synced 2024-12-30 07:40:06 +01:00
111 lines
3.3 KiB
Go
111 lines
3.3 KiB
Go
package log
|
|
|
|
import (
|
|
"runtime"
|
|
"strconv"
|
|
"strings"
|
|
"time"
|
|
)
|
|
|
|
// A Valuer generates a log value. When passed to With, WithPrefix, or
|
|
// WithSuffix in a value element (odd indexes), it represents a dynamic
|
|
// value which is re-evaluated with each log event.
|
|
type Valuer func() interface{}
|
|
|
|
// bindValues replaces all value elements (odd indexes) containing a Valuer
|
|
// with their generated value.
|
|
func bindValues(keyvals []interface{}) {
|
|
for i := 1; i < len(keyvals); i += 2 {
|
|
if v, ok := keyvals[i].(Valuer); ok {
|
|
keyvals[i] = v()
|
|
}
|
|
}
|
|
}
|
|
|
|
// containsValuer returns true if any of the value elements (odd indexes)
|
|
// contain a Valuer.
|
|
func containsValuer(keyvals []interface{}) bool {
|
|
for i := 1; i < len(keyvals); i += 2 {
|
|
if _, ok := keyvals[i].(Valuer); ok {
|
|
return true
|
|
}
|
|
}
|
|
return false
|
|
}
|
|
|
|
// Timestamp returns a timestamp Valuer. It invokes the t function to get the
|
|
// time; unless you are doing something tricky, pass time.Now.
|
|
//
|
|
// Most users will want to use DefaultTimestamp or DefaultTimestampUTC, which
|
|
// are TimestampFormats that use the RFC3339Nano format.
|
|
func Timestamp(t func() time.Time) Valuer {
|
|
return func() interface{} { return t() }
|
|
}
|
|
|
|
// TimestampFormat returns a timestamp Valuer with a custom time format. It
|
|
// invokes the t function to get the time to format; unless you are doing
|
|
// something tricky, pass time.Now. The layout string is passed to
|
|
// Time.Format.
|
|
//
|
|
// Most users will want to use DefaultTimestamp or DefaultTimestampUTC, which
|
|
// are TimestampFormats that use the RFC3339Nano format.
|
|
func TimestampFormat(t func() time.Time, layout string) Valuer {
|
|
return func() interface{} {
|
|
return timeFormat{
|
|
time: t(),
|
|
layout: layout,
|
|
}
|
|
}
|
|
}
|
|
|
|
// A timeFormat represents an instant in time and a layout used when
|
|
// marshaling to a text format.
|
|
type timeFormat struct {
|
|
time time.Time
|
|
layout string
|
|
}
|
|
|
|
func (tf timeFormat) String() string {
|
|
return tf.time.Format(tf.layout)
|
|
}
|
|
|
|
// MarshalText implements encoding.TextMarshaller.
|
|
func (tf timeFormat) MarshalText() (text []byte, err error) {
|
|
// The following code adapted from the standard library time.Time.Format
|
|
// method. Using the same undocumented magic constant to extend the size
|
|
// of the buffer as seen there.
|
|
b := make([]byte, 0, len(tf.layout)+10)
|
|
b = tf.time.AppendFormat(b, tf.layout)
|
|
return b, nil
|
|
}
|
|
|
|
// Caller returns a Valuer that returns a file and line from a specified depth
|
|
// in the callstack. Users will probably want to use DefaultCaller.
|
|
func Caller(depth int) Valuer {
|
|
return func() interface{} {
|
|
_, file, line, _ := runtime.Caller(depth)
|
|
idx := strings.LastIndexByte(file, '/')
|
|
// using idx+1 below handles both of following cases:
|
|
// idx == -1 because no "/" was found, or
|
|
// idx >= 0 and we want to start at the character after the found "/".
|
|
return file[idx+1:] + ":" + strconv.Itoa(line)
|
|
}
|
|
}
|
|
|
|
var (
|
|
// DefaultTimestamp is a Valuer that returns the current wallclock time,
|
|
// respecting time zones, when bound.
|
|
DefaultTimestamp = TimestampFormat(time.Now, time.RFC3339Nano)
|
|
|
|
// DefaultTimestampUTC is a Valuer that returns the current time in UTC
|
|
// when bound.
|
|
DefaultTimestampUTC = TimestampFormat(
|
|
func() time.Time { return time.Now().UTC() },
|
|
time.RFC3339Nano,
|
|
)
|
|
|
|
// DefaultCaller is a Valuer that returns the file and line where the Log
|
|
// method was invoked. It can only be used with log.With.
|
|
DefaultCaller = Caller(3)
|
|
)
|