/
trace.go
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/
trace.go
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// Copyright 2020 Douyu
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package xlog
import (
"context"
"sync"
"time"
"go.uber.org/zap"
)
var _mdTrace = "_meta_trace"
// Tracer ...
type Tracer struct {
BeginTime time.Time
fields []zap.Field
mu sync.RWMutex
lv zap.AtomicLevel
}
// NewTracer ...
func NewTracer() *Tracer {
return &Tracer{
BeginTime: time.Now(),
fields: make([]zap.Field, 0),
lv: zap.NewAtomicLevelAt(zap.InfoLevel),
}
}
// Flush ...
func (t *Tracer) Flush(msg string, logger *Logger) {
t.mu.RLock()
defer t.mu.RUnlock()
switch t.lv.Level() {
case zap.InfoLevel:
logger.Info(msg, t.fields...)
case zap.WarnLevel:
logger.Warn(msg, t.fields...)
case zap.ErrorLevel:
logger.Error(msg, t.fields...)
default:
}
}
// Info ...
func (t *Tracer) Info(fields ...Field) {
t.mu.Lock()
defer t.mu.Unlock()
t.fields = append(t.fields, fields...)
if t.lv.Level() < zap.InfoLevel {
t.lv.SetLevel(zap.InfoLevel)
}
}
// Warn ...
func (t *Tracer) Warn(fields ...Field) {
t.mu.Lock()
defer t.mu.Unlock()
t.fields = append(t.fields, fields...)
if t.lv.Level() < zap.WarnLevel {
t.lv.SetLevel(zap.WarnLevel)
}
}
// Error ...
func (t *Tracer) Error(fields ...Field) {
t.mu.Lock()
defer t.mu.Unlock()
t.fields = append(t.fields, fields...)
if t.lv.Level() < zap.ErrorLevel {
t.lv.SetLevel(zap.ErrorLevel)
}
}
// ExtractTraceMD ...
func ExtractTraceMD(ctx interface{ Get(string) interface{} }) (md *Tracer, ok bool) {
md, ok = ctx.Get(_mdTrace).(*Tracer)
return
}
// InjectTraceMD ...
func InjectTraceMD(ctx interface{ Set(string, interface{}) }, md *Tracer) {
ctx.Set(_mdTrace, md)
}
type tracerKey struct{}
// NewContext ...
func NewContext(ctx context.Context, tracer Tracer) context.Context {
return context.WithValue(ctx, tracerKey{}, tracer)
}