{"id":10006525,"date":"2022-09-19T15:13:57","date_gmt":"2022-09-19T07:13:57","guid":{"rendered":"https:\/\/ityet.com\/?p=10006525"},"modified":"2022-09-19T15:13:57","modified_gmt":"2022-09-19T07:13:57","slug":"%e5%be%ae%e6%9c%8d%e5%8a%a1%e5%bc%80%e5%8f%91%e7%b3%bb%e5%88%97%ef%bc%9a%e6%9c%8d%e5%8a%a1%e5%8f%91%e7%8e%b0%ef%bc%8cnacos-%e7%9a%84%e5%b0%8f%e8%a1%a5%e5%85%85","status":"publish","type":"post","link":"https:\/\/itmax.cn\/?p=10006525","title":{"rendered":"\u5fae\u670d\u52a1\u5f00\u53d1\u7cfb\u5217\uff1a\u670d\u52a1\u53d1\u73b0\uff0cnacos \u7684\u5c0f\u8865\u5145"},"content":{"rendered":"<p><a href=\"https:\/\/link.segmentfault.com\/?enc=kAbG%2BYgdG6PtRv9nutHXnA%3D%3D.8AHqSnl2OOuJl5iDXOkKtiBBSBzHB1JNod%2FA1MpKxVBDrMoKYobygyfqP81myC6JxYMyHfg%2Fe1M7axVncTNp%2BQ%3D%3D\" rel=\"nofollow\">\u6e90\u7801\u5730\u5740<\/a><\/p>\n<h2>\u670d\u52a1\u53d1\u73b0<\/h2>\n<p>\u6846\u67b6\u4e2d\u7684\u670d\u52a1\u53d1\u73b0\uff0c\u4f7f\u7528\u7684\u662f nacos \u63d0\u4f9b\u7684\u3002<\/p>\n<p>nacos \u63d0\u4f9b\u7684\u57df\u7684\u6982\u5ff5\u975e\u5e38\u597d\u7528\uff0c\u80fd\u591f\u5f88\u65b9\u4fbf\u7684\u5c06\u5f00\u53d1\u73af\u5883\u548c\u672c\u5730\u73af\u5883\u533a\u5206\u6765\u5f00\uff0c\u6709\u52a9\u4e8e\u63a5\u53e3\u8c03\u8bd5\u3002<\/p>\n<p>\u4f46\u662f\u5b9e\u73b0\u4e0a\u4e5f\u6709\u4e00\u4e9b\u7f3a\u70b9\uff0c\u90a3\u5c31\u662f\u7f51\u5173\u65e0\u6cd5\u83b7\u53d6\u5230\u670d\u52a1\u6ce8\u518c\u7684\u4e8b\u4ef6\uff0c\u800c\u4e14\u5f53\u670d\u52a1\u542f\u52a8\u65f6\uff0c\u7f51\u5173\u4f1a\u6709\u51e0\u79d2\u5230\u5341\u51e0\u79d2\u7684\u65f6\u95f4\uff0c\u624d\u80fd\u591f\u53d1\u73b0\u6ce8\u518c\u7684\u65b0\u670d\u52a1\uff0c\u6b64\u65f6\uff0c\u624d\u80fd\u591f\u8f6c\u53d1\u8bf7\u6c42\u3002<\/p>\n<p>\u5bf9\u4e8e\u7f51\u5173\u65e0\u6cd5\u83b7\u53d6\u5230\u670d\u52a1\u6ce8\u518c\u4e8b\u4ef6\uff0c<code>Eureka<\/code> \u63d0\u4f9b\u4e86 <code>EurekalnstanceRegisteredEvent<\/code>\u3001<code>EurekalnstanceCanceledEvent<\/code>\u7b49\u4e8b\u4ef6\u53ef\u4ee5\u5224\u65ad\u3002<\/p>\n<p>\u4f46\u662f\u6211\u6ca1\u6709\u5728 nacos \u4e0b\u627e\u5230\u7c7b\u4f3c\u7684\u65b9\u6cd5\uff0c\u5bf9\u6b64\u4e00\u5f00\u59cb\u6211\u7684\u89e3\u51b3\u65b9\u6848\u662f\uff0c\u81ea\u5df1\u505a\u4e00\u4e2a\u68c0\u6d4b\u670d\u52a1\u7c7b <code>cn.gateway.core.InstanceDetect<\/code>\uff0c\u5c06\u5df2\u7ecf\u6ce8\u518c\u4e0a\u7684\u670d\u52a1\u4fdd\u5b58\uff0c\u4e4b\u540e\u5b9a\u65f6\u626b\u63cf\uff0c\u548c\u4fdd\u5b58\u7684\u670d\u52a1\u5bf9\u6bd4\uff0c\u5982\u679c\u65b0\u589e\u5c31\u662f\u6ce8\u518c\u6210\u529f\uff0c\u5982\u679c\u4e0d\u5b58\u5728\u5c31\u662f\u53d6\u6d88\u6ce8\u518c\u3002<\/p>\n<p>\u4e0d\u8fc7\u6700\u540e\uff0c\u8fd8\u662f\u627e\u5230\u4e86\u76f8\u5bf9\u5b8c\u7f8e\u7684\u89e3\u51b3\u65b9\u6cd5\uff0c\u901a\u8fc7 <code>NacosServiceManager<\/code> \uff0c\u5728 <code>InstanceRegisteredEvent<\/code> \u4e8b\u4ef6\u89e6\u53d1\u540e\uff0c\u4e5f\u5c31\u662f\u7f51\u5173\u672c\u8eab\u6ce8\u518c\u5230 nacos \u540e\uff0c<code>nacosServiceManager.getNamingService(null)<\/code> \u8fd9\u6bb5\u4ee3\u7801\u624d\u80fd\u591f\u83b7\u53d6\u5230 <code>namingService<\/code> \u5bf9\u8c61\u3002<\/p>\n<p>\u6700\u540e\u5c31\u53ef\u4ee5\u901a\u8fc7 <code>GatewayProperties<\/code> \u83b7\u53d6\u5230\u6240\u6709\u7684\u670d\u52a1\u540d\u79f0\uff0c\u518d\u8fdb\u884c\u5bf9\u5e94\u7684\u8ba2\u9605\u5373\u53ef\u3002<\/p>\n<p>\u80fd\u591f\u5b9e\u73b0\u8fd9\u4e00\u70b9\uff0c\u8fd8\u662f\u56e0\u4e3a nacos \u548c gateway \u90fd\u662f\u57fa\u4e8e <code>spring.application.name<\/code> \u4f5c\u4e3a\u6ce8\u518c\u670d\u52a1\u548c\u8f6c\u53d1\u670d\u52a1\u7684\u4f9d\u636e\u3002<\/p>\n<pre><code class=\"kotlin\">@Service\nclass InstanceDetect(\n    private val nacosServiceManager: NacosServiceManager,\n    private val gatewayProperties: GatewayProperties\n) {\n    @EventListener\n    fun onApplicationEvent(event: InstanceRegisteredEvent&lt;*&gt;) {\n        val namingService = nacosServiceManager.getNamingService(null)\n        gatewayProperties.routes.forEach {\n            val serviceInstanceMap = mutableMapOf&lt;String, Instance&gt;()\n            namingService.subscribe(it.id) { event -&gt;\n                if (event !is NamingEvent) {\n                    return@subscribe\n                }\n                val serviceInstances = HashSet(serviceInstanceMap.keys)\n                event.instances.forEach { instance -&gt;\n                    if (serviceInstances.contains(instance.instanceId)) {\n                        serviceInstances.remove(instance.instanceId)\n                    } else {\n                        serviceInstanceMap[instance.instanceId] = instance\n                        log.info(\n                            &quot;instance connected : {}, ip : {}, port : {}&quot;,\n                            instance.instanceId, instance.ip, instance.port\n                        )\n                    }\n                }\n                for (removedInstance in serviceInstances) {\n                    val remove = serviceInstanceMap.remove(removedInstance)!!\n                    log.info(\n                        &quot;instance disconnected : {}, ip : {}, port : {}&quot;,\n                        removedInstance, remove.ip, remove.port\n                    )\n                }\n            }\n        }\n    }\n}<\/code><\/pre>\n<p>\u9664\u6b64\u4e4b\u5916\uff0c\u5ba2\u6237\u7aef\u4e5f\u63d0\u4f9b\u4e86 <code>RegisterEventListener<\/code> \u8fd9\u4e2a\u7c7b\uff0c\u5f53\u5ba2\u6237\u7aef\u6ce8\u518c\u5230 nacos \u6210\u529f\u65f6\uff0c\u6253\u5370\u4e00\u4e9b\u4fe1\u606f\u3002<\/p>\n<p><a href=\"https:\/\/segmentfault.com\/a\/1190000042509989\">https:\/\/segmentfault.com\/a\/1190000042509989<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6e90\u7801\u5730\u5740 \u670d\u52a1\u53d1\u73b0 \u6846\u67b6\u4e2d\u7684\u670d\u52a1\u53d1\u73b0\uff0c\u4f7f\u7528\u7684\u662f nacos \u63d0\u4f9b\u7684\u3002 nacos \u63d0\u4f9b\u7684\u57df\u7684\u6982\u5ff5\u975e\u5e38\u597d\u7528\uff0c\u80fd\u591f [&hellip;]<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[],"tags":[],"class_list":["post-10006525","post","type-post","status-publish","format-standard","hentry"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts\/10006525","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=10006525"}],"version-history":[{"count":0,"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts\/10006525\/revisions"}],"wp:attachment":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=10006525"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=10006525"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=10006525"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}