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90 lines
2.3 KiB
Go
90 lines
2.3 KiB
Go
package logjson
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import (
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"encoding/json"
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"fmt"
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"io"
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"os"
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"git.blauwelle.com/go/crate/log/logsdk"
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"git.blauwelle.com/go/crate/runtimehelper"
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"git.blauwelle.com/go/crate/synchelper"
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)
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var _ logsdk.EntryProcessor = &Processor{}
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// New 返回日志处理对象,
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// 返回的对象是 [logsdk.EntryProcessor].
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func New(opts ...Option) *Processor {
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cfg := newConfig(opts...)
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return &Processor{
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bufferPool: cfg.pool,
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output: cfg.output,
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timeFormat: cfg.timestampFormat,
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disableTime: cfg.disableTime,
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disableHTMLEscape: cfg.disableHTMLEscape,
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prettyPrint: cfg.prettyPrint,
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}
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}
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// Processor 日志处理对象, 把日志处理成 JSON.
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type Processor struct {
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bufferPool synchelper.BytesBufferPool
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output io.Writer
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timeFormat string
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disableTime bool
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disableHTMLEscape bool
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prettyPrint bool
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}
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// Process 处理日志
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func (processor *Processor) Process(entry logsdk.ReadonlyEntry) {
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m := Entry{
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Stack: entry.Stack,
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Fields: entry.Fields,
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Level: entry.Level,
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Message: entry.Message,
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}
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if !processor.disableTime {
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m.Time = entry.Time.Format(processor.timeFormat) // 1次分配
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}
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if entry.Caller.IsValid() {
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// 1次分配
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// 直接取 &entry.Caller 会增加堆内存分配
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m.Caller = &runtimehelper.Frame{
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Function: entry.Caller.Function,
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File: entry.Caller.File,
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Line: entry.Caller.Line,
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}
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}
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buf := processor.bufferPool.Get()
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buf.Reset()
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defer processor.bufferPool.Put(buf)
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encoder := json.NewEncoder(buf)
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if processor.prettyPrint {
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encoder.SetIndent("", " ")
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}
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encoder.SetEscapeHTML(!processor.disableHTMLEscape)
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// Encode 2次分配
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if err := encoder.Encode(m); err != nil {
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_, _ = fmt.Fprintf(os.Stderr, "JSON processor cannot encode log %#v: %s\n", m, err.Error())
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}
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if _, err := buf.WriteTo(processor.output); err != nil {
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_, _ = fmt.Fprintf(os.Stderr, "JSON processor cannot write log: %s\n", err.Error())
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}
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}
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// Entry 被用来 JSON 序列化
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type Entry struct {
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Message string `json:"msg"`
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Time string `json:"time,omitempty"`
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Caller *runtimehelper.Frame `json:"caller,omitempty"`
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Stack []runtimehelper.Frame `json:"stack,omitempty"`
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Fields []logsdk.KV `json:"fields,omitempty"`
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Level logsdk.Level `json:"level"`
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}
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