func execLevelExamples() {
// 默认日志级别 debug
log.Printf("default log level: %s", log.GetLevel())
log.Tracef("IsTraceEnabled? %t", log.IsTraceEnabled())
log.Debugf("IsDebugEnabled? %t", log.IsDebugEnabled())
log.Infof("IsInfoEnabled? %t", log.IsInfoEnabled())
// trace 级别
log.SetLevel(log.Ltrace)
log.Tracef(msgFmt, 1)
// info 级别
log.SetLevel(log.Linfo)
log.Debugf(msgFmt, 2)
log.Infof(msgFmt, 2)
// warn 级别
log.SetLevel(log.Lwarn)
log.Infof(msgFmt, 3)
log.Warnf(msgFmt, 3)
// error 级别
log.SetLevel(log.Lerror)
log.Warnf(msgFmt, 4)
log.Errorf(msgFmt, 4)
// 恢复默认级别，防止影响其他测试
// debug 级别
log.SetLevel(log.Ldebug)
log.Tracef(msgFmt, 5)
log.Debugf(msgFmt, 5)
}
// Tprintf 简单实现打印方法
func (p *CustomPrinter) Tprintf(l log.Level, tag string, format string, m ...interface{}) {
if log.GetLevel() > l {
return
}
p.mu.Lock()
defer p.mu.Unlock()
if p.dateFmt != "" {
now := time.Now()
p.buf.WriteString(now.Format(p.dateFmt))
p.buf.WriteByte(' ')
if p.timeFmt != "" {
p.buf.WriteString(now.Format(p.timeFmt))
p.buf.WriteByte(' ')
}
}
if p.tag {
if tag == "" {
tag = "-"
}
p.buf.WriteString(tag)
p.buf.WriteByte(' ')
}
if p.prefixLen > -1 {
_, file, line, ok := runtime.Caller(2) // expensive
if ok && p.prefixLen < len(file) {
p.buf.WriteString(file[p.prefixLen:])
p.buf.WriteByte(':')
p.buf.WriteString(strconv.Itoa(line))
p.buf.WriteByte(' ')
} else {
p.buf.WriteString("???:0 ")
}
}
if format == "" {
p.buf.WriteString(fmt.Sprint(m...))
} else {
p.buf.WriteString(fmt.Sprintf(format, m...))
}
p.buf.WriteByte('\n')
}