極速精簡 Go 版 Logstash

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也是這麼處理的：","attrs":{}}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"codeblock","attrs":{"lang":"go"},"content":[{"type":"text","text":"func (mh *MessageHandler) Consume(_, val string) error {\n var m map[string]interface{}\n // 反序列化從 kafka 中的消息\n if err := jsoniter.Unmarshal([]byte(val), &m); err != nil {\n return err\n }\n // es 寫入index配置\n index := mh.indexer.GetIndex(m)\n // filter 鏈式處理【因爲沒有泛型，整個處理都是 `map進map出`】\n for _, proc := range mh.filters {\n if m = proc(m); m == nil {\n return nil\n }\n }\n bs, err := jsoniter.Marshal(m)\n if err != nil {\n return err\n }\n // es 寫入\n return mh.writer.Write(index, string(bs))\n}\n","attrs":{}}]},{"type":"heading","attrs":{"align":null,"level":2},"content":[{"type":"text","text":"數據流","attrs":{}}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"說完了數據處理，以及上下游的連接點。但是數據要從 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","attrs":{}},{"type":"link","attrs":{"href":"#%E5%90%AF%E5%8A%A8","title":"","type":null},"content":[{"type":"text","text":"啓動","attrs":{}}]},{"type":"text","text":" 整個流程中，其實就是一個組合模式：","attrs":{}}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"codeblock","attrs":{"lang":"go"},"content":[{"type":"text","text":"func main() {\n // 解析命令行參數，啓動優雅退出\n ...\n // service 組合模式\n group := service.NewServiceGroup()\n defer group.Stop()\n\n for _, processor := range c.Clusters {\n // 連接es\n ...\n // filter processors 構建\n ...\n // 準備es的寫入操作 {寫入的index, 寫入器writer}\n handle := handler.NewHandler(writer, indexer)\n handle.AddFilters(filters...)\n handle.AddFilters(filter.AddUriFieldFilter(\"url\", \"uri\"))\n // 按照配置啓動kafka，並將消費操作傳入，同時加入組合器\n for _, k := range toKqConf(processor.Input.Kafka) {\n group.Add(kq.MustNewQueue(k, handle))\n }\n }\n // 啓動這個組合器\n group.Start()\n}\n","attrs":{}}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"整個數據流，就和這個 ","attrs":{}},{"type":"codeinline","content":[{"type":"text","text":"group","attrs":{}}],"attrs":{}},{"type":"text","text":" 組合器有關了。","attrs":{}}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"codeblock","attrs":{"lang":"go"},"content":[{"type":"text","text":"group.Start()\n |- group.doStart()\n |- [service.Start() for service in group.services]\n","attrs":{}}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"那麼說明加入 ","attrs":{}},{"type":"codeinline","content":[{"type":"text","text":"group","attrs":{}}],"attrs":{}},{"type":"text","text":" 的 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q.consumerRoutines.Wait()\n}\n","attrs":{}}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"numberedlist","attrs":{"start":1,"normalizeStart":1},"content":[{"type":"listitem","attrs":{"listStyle":null},"content":[{"type":"paragraph","attrs":{"indent":0,"number":1,"align":null,"origin":null},"content":[{"type":"text","text":"啓動 ","attrs":{}},{"type":"codeinline","content":[{"type":"text","text":"kafka","attrs":{}}],"attrs":{}},{"type":"text","text":" 消費程序","attrs":{}}]}]},{"type":"listitem","attrs":{"listStyle":null},"content":[{"type":"paragraph","attrs":{"indent":0,"number":2,"align":null,"origin":null},"content":[{"type":"text","text":"啓動 ","attrs":{}},{"type":"codeinline","content":[{"type":"text","text":"kafka","attrs":{}}],"attrs":{}},{"type":"text","text":" 消費拉取端【可能會被名字迷惑，實際上是從 ","attrs":{}},{"type":"codeinline","content":[{"type":"text","text":"kafka","attrs":{}}],"attrs":{}},{"type":"text","text":" 拉取消息到 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更多的設計和實現文章，可以持續關注我們。","attrs":{}}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"https://github.com/tal-tech/go-zero","attrs":{}}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"歡迎使用 go-zero 並 ","attrs":{}},{"type":"text","marks":[{"type":"strong","attrs":{}}],"text":"star","attrs":{}},{"type":"text","text":" 支持我們！","attrs":{}}]},{"type":"heading","attrs":{"align":null,"level":2},"content":[{"type":"text","text":"微信交流羣","attrs":{}}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"關注『微服務實踐』公衆號並回復 進羣 獲取社區羣二維碼。","attrs":{}}]}]}