{"id":745,"date":"2024-11-10T22:57:40","date_gmt":"2024-11-10T14:57:40","guid":{"rendered":"https:\/\/www.db2go.net\/?p=745"},"modified":"2024-11-10T22:58:24","modified_gmt":"2024-11-10T14:58:24","slug":"%e5%9b%9b-%e6%95%b0%e6%8d%ae%e4%bc%a0%e8%be%93%e4%b8%8e%e6%b6%88%e6%81%af%e8%b7%af%e7%94%b1%e7%9a%84%e6%a0%b8%e5%bf%83%e4%bb%a3%e7%a0%81","status":"publish","type":"post","link":"https:\/\/www.db2go.net\/?p=745","title":{"rendered":"\u56db.\u6570\u636e\u4f20\u8f93\u4e0e\u6d88\u606f\u8def\u7531\u7684\u6838\u5fc3\u4ee3\u7801"},"content":{"rendered":"<p>\u5728 KubeEdge \u4e2d\uff0c\u9ad8\u6548\u7684\u6570\u636e\u4f20\u8f93\u4e0e\u6d88\u606f\u8def\u7531\u662f\u901a\u8fc7 <code>cloudhub<\/code>\uff08\u4e91\u7aef\uff09\u548c <code>eventbus<\/code>\uff08\u8fb9\u7aef\uff09\u6a21\u5757\u5171\u540c\u5b9e\u73b0\u7684\u3002\u4e91\u7aef\u7684 <code>cloudhub<\/code> \u6a21\u5757\u8d1f\u8d23\u4e91\u8fb9\u6570\u636e\u7684\u4f20\u8f93\u4e0e\u6d88\u606f\u8def\u7531\uff0c\u800c\u8fb9\u7aef\u7684 <code>eventbus<\/code> \u6a21\u5757\u652f\u6301 MQTT \u534f\u8bae\uff0c\u4e3b\u8981\u7528\u4e8e\u8bbe\u5907\u6570\u636e\u4e0a\u62a5\u548c\u63a7\u5236\u6307\u4ee4\u4e0b\u53d1\u3002\u4ee5\u4e0b\u662f\u5bf9\u6838\u5fc3\u4ee3\u7801\u7684\u8be6\u7ec6\u5206\u6790\u3002<\/p>\n<h3>1. \u4e91\u7aef\u6570\u636e\u4f20\u8f93\u4e0e\u6d88\u606f\u8def\u7531\u6a21\u5757\uff08<code>cloudhub<\/code>\uff09<\/h3>\n<p><code>cloudhub<\/code> \u662f\u4e91\u7aef\u7684\u6570\u636e\u4f20\u8f93\u548c\u6d88\u606f\u8def\u7531\u6a21\u5757\uff0c\u4e3b\u8981\u8d1f\u8d23\u63a5\u6536\u6765\u81ea\u8fb9\u7aef\u7684\u6d88\u606f\u5e76\u5c06\u5176\u8f6c\u53d1\u5230 Kubernetes \u4e2d\uff0c\u540c\u65f6\u5c06\u4e91\u7aef\u4e0b\u53d1\u7684\u63a7\u5236\u6307\u4ee4\u6216\u914d\u7f6e\u66f4\u65b0\u4f20\u9012\u5230\u8fb9\u7aef\u3002\u6838\u5fc3\u4ee3\u7801\u4f4d\u4e8e <code>cloud\/pkg\/cloudhub<\/code> \u76ee\u5f55\u4e2d\u3002<\/p>\n<h4>WebSocket \u670d\u52a1\u5668\u7684\u521d\u59cb\u5316<\/h4>\n<p><code>cloudhub<\/code> \u6a21\u5757\u901a\u8fc7 WebSocket \u6765\u5efa\u7acb\u4e0e <code>edgehub<\/code> \u7684\u53cc\u5411\u901a\u4fe1\u3002WebSocket \u670d\u52a1\u5668\u7684\u521d\u59cb\u5316\u4ee3\u7801\u5728 <code>cloud\/pkg\/cloudhub\/servers\/server.go<\/code> \u4e2d\u3002<\/p>\n<ul>\n<li><strong>\u670d\u52a1\u5668\u521d\u59cb\u5316\u4e0e\u76d1\u542c<\/strong>\uff1a\u5728 <code>NewWsServer<\/code> \u51fd\u6570\u4e2d\uff0c\u8bbe\u7f6e WebSocket \u670d\u52a1\u5668\u7684\u5730\u5740\u548c\u7aef\u53e3\uff0c\u5e76\u901a\u8fc7 <code>HandleWSConnection<\/code> \u51fd\u6570\u6765\u5904\u7406\u65b0\u8fde\u63a5\u3002\n<pre><code class=\"language-go line-numbers\">func NewWsServer(config *v1alpha1.EdgeControllerConfig) *WsServer {\n  return &amp;WsServer{\n      Config:  config,\n      Address: config.ControllerContext.Address,\n  }\n}\n\nfunc (s *WsServer) HandleWSConnection(conn *websocket.Conn) {\n  go s.ReceiveMessage(conn)\n  go s.SendMessage(conn)\n}\n<\/code><\/pre>\n<\/li>\n<li><strong>\u6d88\u606f\u63a5\u6536\u4e0e\u53d1\u9001<\/strong>\uff1a\u5728 <code>HandleWSConnection<\/code> \u4e2d\u542f\u52a8\u4e24\u4e2a\u534f\u7a0b\uff0c\u5206\u522b\u7528\u4e8e\u63a5\u6536\u548c\u53d1\u9001\u6d88\u606f\u3002<code>ReceiveMessage<\/code> \u51fd\u6570\u8d1f\u8d23\u4ece\u8fb9\u7aef\u63a5\u6536\u6d88\u606f\u5e76\u8def\u7531\u5230\u4e91\u7aef\u7684\u5404\u4e2a\u7ec4\u4ef6\uff0c\u800c <code>SendMessage<\/code> \u51fd\u6570\u7528\u4e8e\u5c06\u4e91\u7aef\u7684\u63a7\u5236\u6307\u4ee4\u53d1\u9001\u5230\u8fb9\u7aef\u3002<\/p>\n<\/li>\n<\/ul>\n<h4>\u6d88\u606f\u8def\u7531<\/h4>\n<p>\u4e91\u7aef <code>cloudhub<\/code> \u6a21\u5757\u7684\u6d88\u606f\u8def\u7531\u5728 <code>cloud\/pkg\/cloudhub\/handler\/messagehandler.go<\/code> \u4e2d\u5b9e\u73b0\u3002<code>ProcessMessage<\/code> \u51fd\u6570\u6839\u636e\u6d88\u606f\u7684\u76ee\u6807\u548c\u7c7b\u578b\uff0c\u5c06\u6d88\u606f\u8def\u7531\u5230\u4e0d\u540c\u7684\u5904\u7406\u903b\u8f91\u3002<\/p>\n<ul>\n<li><strong>\u6d88\u606f\u5904\u7406<\/strong>\uff1a<code>ProcessMessage<\/code> \u51fd\u6570\u6839\u636e\u6d88\u606f\u7684\u8def\u7531\u4fe1\u606f\uff08\u5982\u76ee\u6807\u8bbe\u5907\u548c\u64cd\u4f5c\u7c7b\u578b\uff09\uff0c\u9009\u62e9\u4e0d\u540c\u7684\u5904\u7406\u65b9\u6cd5\u3002\u4f8b\u5982\uff0c\u8bbe\u5907\u6570\u636e\u4f1a\u88ab\u53d1\u9001\u5230\u8bbe\u5907\u63a7\u5236\u5668\uff0c\u800c\u5e94\u7528\u914d\u7f6e\u66f4\u65b0\u5219\u4f1a\u8def\u7531\u5230\u5e94\u7528\u7ba1\u7406\u5668\u3002\n<pre><code class=\"language-go line-numbers\">func (mh *MessageHandler) ProcessMessage(msg model.Message) {\n  target := msg.GetTarget()\n  switch target {\n  case \"device\":\n      mh.deviceController.HandleDeviceMessage(msg)\n  case \"application\":\n      mh.appController.HandleAppMessage(msg)\n  default:\n      log.Warningf(\"Unknown target: %s\", target)\n  }\n}\n<\/code><\/pre>\n<\/li>\n<\/ul>\n<h3>2. \u8fb9\u7aef\u6570\u636e\u4f20\u8f93\u4e0e\u534f\u8bae\u9002\u914d\u6a21\u5757\uff08<code>eventbus<\/code>\uff09<\/h3>\n<p>\u5728\u8fb9\u7aef\uff0c<code>eventbus<\/code> \u6a21\u5757\u7528\u4e8e\u5c06\u8bbe\u5907\u6570\u636e\u4e0a\u62a5\u5230\u4e91\u7aef\uff0c\u6216\u63a5\u6536\u4e91\u7aef\u4e0b\u53d1\u7684\u63a7\u5236\u6307\u4ee4\u3002<code>eventbus<\/code> \u652f\u6301 MQTT \u534f\u8bae\uff0c\u4f7f KubeEdge \u80fd\u591f\u4e0e IoT \u8bbe\u5907\u8fdb\u884c\u9ad8\u6548\u7684\u901a\u4fe1\u3002<code>eventbus<\/code> \u7684\u6838\u5fc3\u4ee3\u7801\u4f4d\u4e8e <code>edge\/pkg\/eventbus<\/code> \u76ee\u5f55\u4e2d\u3002<\/p>\n<h4>MQTT \u5ba2\u6237\u7aef\u7684\u521d\u59cb\u5316\u4e0e\u914d\u7f6e<\/h4>\n<p>MQTT \u5ba2\u6237\u7aef\u521d\u59cb\u5316\u4ee3\u7801\u4f4d\u4e8e <code>edge\/pkg\/eventbus\/mqtt\/client.go<\/code> \u4e2d\uff0c\u4e3b\u8981\u8d1f\u8d23\u4e0e MQTT \u4ee3\u7406\u5efa\u7acb\u8fde\u63a5\uff0c\u5e76\u8ba2\u9605\u7279\u5b9a\u7684\u4e3b\u9898\u3002<\/p>\n<ul>\n<li><strong>MQTT \u5ba2\u6237\u7aef\u521d\u59cb\u5316<\/strong>\uff1a<code>NewMqttClient<\/code> \u51fd\u6570\u521b\u5efa\u4e00\u4e2a\u65b0\u7684 MQTT \u5ba2\u6237\u7aef\u5e76\u8fdb\u884c\u8fde\u63a5\u3002\u914d\u7f6e\u6587\u4ef6\u5305\u62ec MQTT \u4ee3\u7406\u5730\u5740\u3001\u7aef\u53e3\u3001\u5ba2\u6237\u7aef ID \u7b49\u3002\n<pre><code class=\"language-go line-numbers\">func NewMqttClient(config MqttConfig) (*MqttClient, error) {\n  opts := mqtt.NewClientOptions()\n  opts.AddBroker(config.Broker)\n  opts.SetClientID(config.ClientID)\n  client := mqtt.NewClient(opts)\n  token := client.Connect()\n  if token.Wait() &amp;&amp; token.Error() != nil {\n      return nil, token.Error()\n  }\n  return &amp;MqttClient{Client: client}, nil\n}\n<\/code><\/pre>\n<\/li>\n<li><strong>\u8ba2\u9605\u8bbe\u5907\u4e3b\u9898<\/strong>\uff1a\u901a\u8fc7 <code>Subscribe<\/code> \u65b9\u6cd5\uff0c<code>eventbus<\/code> \u6a21\u5757\u53ef\u4ee5\u76d1\u542c\u8bbe\u5907\u7684\u7279\u5b9a\u4e3b\u9898\uff0c\u4ee5\u63a5\u6536\u6765\u81ea\u4e91\u7aef\u7684\u63a7\u5236\u6307\u4ee4\u3002\n<pre><code class=\"line-numbers\">func (mc *MqttClient) Subscribe(topic string, callback mqtt.MessageHandler) error {\n  token := mc.Client.Subscribe(topic, 0, callback)\n  token.Wait()\n  return token.Error()\n}\n<\/code><\/pre>\n<\/li>\n<\/ul>\n<h4>\u6d88\u606f\u5904\u7406\u4e0e\u8def\u7531<\/h4>\n<p><code>eventbus<\/code> \u6a21\u5757\u4e2d\u7684\u6d88\u606f\u8def\u7531\u903b\u8f91\u5728 <code>eventbus.go<\/code> \u4e2d\u5b9e\u73b0\uff0c\u7528\u4e8e\u5728\u8fb9\u7aef\u4e0d\u540c\u6a21\u5757\u95f4\u4f20\u9012\u6d88\u606f\u3002<\/p>\n<ul>\n<li><strong>\u4e0b\u884c\u6d88\u606f\uff08\u4ece\u4e91\u7aef\u5230\u8bbe\u5907\uff09<\/strong>\uff1a\u63a5\u6536\u5230\u7684\u63a7\u5236\u6307\u4ee4\u4f1a\u88ab\u89e3\u6790\uff0c\u5e76\u8f6c\u53d1\u5230\u5bf9\u5e94\u7684\u8bbe\u5907\u6216\u5e94\u7528\u6a21\u5757\u8fdb\u884c\u5904\u7406\u3002\n<pre><code class=\"language-go line-numbers\">func (eb *EventBus) ProcessMessage(msg model.Message) {\n  switch msg.GetResource() {\n  case \"device\":\n      eb.deviceManager.HandleDeviceMessage(msg)\n  case \"application\":\n      eb.appManager.HandleAppMessage(msg)\n  default:\n      log.Warningf(\"Unknown resource type: %s\", msg.GetResource())\n  }\n}\n<\/code><\/pre>\n<\/li>\n<li><strong>\u4e0a\u884c\u6d88\u606f\uff08\u4ece\u8bbe\u5907\u5230\u4e91\u7aef\uff09<\/strong>\uff1a\u8bbe\u5907\u72b6\u6001\u6216\u4f20\u611f\u6570\u636e\u4f1a\u901a\u8fc7 <code>Publish<\/code> \u65b9\u6cd5\u53d1\u5e03\u5230 MQTT \u4e3b\u9898\uff0c\u4ee5\u4fbf\u4e0a\u4f20\u5230\u4e91\u7aef\u3002\n<pre><code class=\"language-go line-numbers\">func (mc *MqttClient) Publish(topic string, payload []byte) error {\n  token := mc.Client.Publish(topic, 0, false, payload)\n  token.Wait()\n  return token.Error()\n}\n<\/code><\/pre>\n<\/li>\n<\/ul>\n<h3>3. \u8fb9\u7aef\u4e0e\u4e91\u7aef\u7684\u6570\u636e\u683c\u5f0f\uff08\u6d88\u606f\u683c\u5f0f\uff09<\/h3>\n<p>\u5728 <code>cloudhub<\/code> \u548c <code>eventbus<\/code> \u4e2d\uff0c\u6d88\u606f\u7684\u6570\u636e\u683c\u5f0f\u91c7\u7528\u4e86\u7edf\u4e00\u7684\u7ed3\u6784 <code>Message<\/code>\uff0c\u5176\u5b9a\u4e49\u4f4d\u4e8e <code>pkg\/common\/message\/message.go<\/code> \u6587\u4ef6\u4e2d\u3002\u6d88\u606f\u5305\u542b\u4e86\u76ee\u6807\u3001\u6765\u6e90\u3001\u64cd\u4f5c\u7c7b\u578b\u3001\u6570\u636e\u5185\u5bb9\u7b49\u5b57\u6bb5\u3002<\/p>\n<pre><code class=\"language-go line-numbers\">type Message struct {\n    Header Header\n    Router Router\n    Content interface{}\n}\n<\/code><\/pre>\n<ul>\n<li><strong>Header<\/strong>\uff1a\u5305\u62ec\u6d88\u606f\u7684 ID\u3001\u6d88\u606f\u7c7b\u578b\u3001\u521b\u5efa\u65f6\u95f4\u7b49\u5143\u4fe1\u606f\u3002<\/li>\n<li><strong>Router<\/strong>\uff1a\u5305\u542b\u6d88\u606f\u7684\u6765\u6e90\u3001\u76ee\u6807\u3001\u7ec4\u548c\u8d44\u6e90\u8def\u5f84\u7b49\uff0c\u7528\u4e8e\u6d88\u606f\u8def\u7531\u3002<\/li>\n<li><strong>Content<\/strong>\uff1a\u6d88\u606f\u7684\u5b9e\u9645\u5185\u5bb9\uff0c\u901a\u5e38\u4e3a JSON \u683c\u5f0f\uff0c\u5305\u542b\u8bbe\u5907\u6570\u636e\u6216\u63a7\u5236\u6307\u4ee4\u3002<\/li>\n<\/ul>\n<h3>4. \u65ad\u7ebf\u91cd\u8fde\u4e0e\u6d88\u606f\u7f13\u5b58<\/h3>\n<p>\u5728 <code>cloudhub<\/code> \u548c <code>eventbus<\/code> \u4e2d\uff0c\u4e3a\u4fdd\u8bc1\u6d88\u606f\u4f20\u8f93\u7684\u53ef\u9760\u6027\uff0c\u8bbe\u8ba1\u4e86\u65ad\u7ebf\u91cd\u8fde\u548c\u6d88\u606f\u7f13\u5b58\u673a\u5236\uff0c\u4ee5\u5728\u7f51\u7edc\u65ad\u5f00\u540e\u91cd\u8fde\u65f6\u7ee7\u7eed\u6d88\u606f\u4f20\u8f93\u3002<\/p>\n<h4>\u8fb9\u7aef\u6d88\u606f\u7f13\u5b58\u4e0e\u91cd\u8fde<\/h4>\n<p><code>eventbus<\/code> \u6a21\u5757\u5728\u7f51\u7edc\u65ad\u5f00\u65f6\u4f1a\u7f13\u5b58\u672a\u53d1\u9001\u7684\u6d88\u606f\uff0c\u5e76\u5728\u7f51\u7edc\u6062\u590d\u65f6\u5c1d\u8bd5\u91cd\u65b0\u53d1\u9001\u3002\u65ad\u7ebf\u91cd\u8fde\u903b\u8f91\u5728 <code>edge\/pkg\/edgehub\/clients\/wsclient\/websocket.go<\/code> \u6587\u4ef6\u4e2d\u5b9e\u73b0\u3002<\/p>\n<pre><code class=\"language-go line-numbers\">func (wc *WebSocketClient) KeepConnection() {\n    for {\n        err := wc.InitWebSocket()\n        if err != nil {\n            time.Sleep(retryInterval)\n            continue\n        }\n        wc.HandleConnection()\n    }\n}\n<\/code><\/pre>\n<h3>\u603b\u7ed3<\/h3>\n<p>KubeEdge \u7684\u6570\u636e\u4f20\u8f93\u4e0e\u6d88\u606f\u8def\u7531\u901a\u8fc7 <code>cloudhub<\/code> \u548c <code>eventbus<\/code> \u6a21\u5757\u5b9e\u73b0\uff0c<code>cloudhub<\/code> \u7ba1\u7406\u4e91\u7aef\u7684\u6d88\u606f\u63a5\u6536\u3001\u8def\u7531\u548c\u4e0b\u53d1\uff0c<code>eventbus<\/code> \u63d0\u4f9b\u5bf9 MQTT \u534f\u8bae\u7684\u652f\u6301\uff0c\u5e76\u4e0e\u8bbe\u5907\u8fdb\u884c\u901a\u4fe1\u3002<code>cloudhub<\/code> \u548c <code>eventbus<\/code> \u90fd\u5177\u6709\u6d88\u606f\u8def\u7531\u3001\u65ad\u7ebf\u91cd\u8fde\u548c\u7f13\u5b58\u673a\u5236\uff0c\u4ee5\u786e\u4fdd\u8fb9\u7aef\u8bbe\u5907\u4e0e\u4e91\u7aef\u6570\u636e\u4f20\u8f93\u7684\u9ad8\u6548\u4e0e\u7a33\u5b9a\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728 KubeEdge \u4e2d\uff0c\u9ad8\u6548\u7684\u6570\u636e\u4f20\u8f93\u4e0e\u6d88\u606f\u8def\u7531\u662f\u901a\u8fc7 cloudhub\uff08\u4e91\u7aef\uff09\u548c eventbus\uff08\u8fb9\u7aef\uff09&hellip;<\/p>\n <a href=\"https:\/\/www.db2go.net\/?p=745\" title=\"\u56db.\u6570\u636e\u4f20\u8f93\u4e0e\u6d88\u606f\u8def\u7531\u7684\u6838\u5fc3\u4ee3\u7801\" class=\"entry-more-link\"><span>Read More<\/span> <span class=\"screen-reader-text\">\u56db.\u6570\u636e\u4f20\u8f93\u4e0e\u6d88\u606f\u8def\u7531\u7684\u6838\u5fc3\u4ee3\u7801<\/span><\/a>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"Layout":"","footnotes":""},"categories":[20],"tags":[],"class_list":["entry","author-suredandan","post-745","post","type-post","status-publish","format-standard","category-20"],"views":988,"_links":{"self":[{"href":"https:\/\/www.db2go.net\/index.php?rest_route=\/wp\/v2\/posts\/745","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.db2go.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.db2go.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.db2go.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.db2go.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=745"}],"version-history":[{"count":2,"href":"https:\/\/www.db2go.net\/index.php?rest_route=\/wp\/v2\/posts\/745\/revisions"}],"predecessor-version":[{"id":747,"href":"https:\/\/www.db2go.net\/index.php?rest_route=\/wp\/v2\/posts\/745\/revisions\/747"}],"wp:attachment":[{"href":"https:\/\/www.db2go.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=745"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.db2go.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=745"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.db2go.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=745"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}