What's new in Dubbo-go v1.5.1

{"type":"doc","content":[{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"近期我們發佈了 Dubbo-go v1.5.1，雖然是 v1.5 的一個子版本，但相比於 v1.5.0， 社區還是投入了很大人力添加了如下重大改進。"}]},{"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":"更多信息："},{"type":"link","attrs":{"href":"https://github.com/apache/dubbo-go/releases/tag/v1.5.1","title":""},"content":[{"type":"text","text":"https://github.com/apache/dubbo-go/releases/tag/v1.5.1"}]}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"heading","attrs":{"align":null,"level":1},"content":[{"type":"text","text":"1 應用維度註冊模型"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"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":"在新模型 release 後，我們發現 Provider 每個 URL 發佈元數據都會註冊 ServiceInstance，影響性能需要優化。"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"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":"我們的優化方案是："}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"去除 ServiceDiscoveryRegistry 中註冊 ServiceInstance 的代碼，在 config_loader 中的loadProviderConfig 方法的最後註冊 ServiceInstance"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"具體步驟："}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"1、獲取所有註冊的 Registry，過濾出 ServiceDiscoveryRegistry，拿取所有 ServiceDiscovery。"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"2、創建 ServiceInstance。"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"3、每個 ServiceDiscovery 註冊 ServiceInstance。"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"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":"保證 Provider 在註冊成功之後，才暴露元數據信息。"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"heading","attrs":{"align":null,"level":1},"content":[{"type":"text","text":"2 支持基於 Seata 的事務"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"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":"基於 Seata 擴展實現。通過增加過濾器，在服務端接收  xid 並結合 "},{"type":"link","attrs":{"href":"https://github.com/seata-golang/seata-golang","title":""},"content":[{"type":"text","text":"seata-golang"}]},{"type":"text","text":" 達到支持分佈式事務的目的。 從而使 Dubbo-go 在分佈式場景下，讓用戶有更多的選擇，能適應更多的個性化場景。"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"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":"我們在 dubbo-samples 中給出了 "},{"type":"link","attrs":{"href":"https://github.com/apache/dubbo-samples/tree/master/golang/seata","title":""},"content":[{"type":"text","text":"事務測試用例"}]},{"type":"text","text":" 。"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"heading","attrs":{"align":null,"level":1},"content":[{"type":"text","text":"3 多註冊中心集羣負載均衡"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"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":"對於多註冊中心訂閱的場景，選址時的多了一層註冊中心集羣間的負載均衡："}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"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":"在 Cluster Invoker 這一級，我們支持的選址策略有："}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"bulletedlist","content":[{"type":"listitem","content":[{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"指定優先級"}]}]},{"type":"listitem","content":[{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"同 zone 優先"}]}]},{"type":"listitem","content":[{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"權重輪詢"}]}]}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"heading","attrs":{"align":null,"level":1},"content":[{"type":"text","text":"3 傳輸鏈路安全性"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"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":"該版本在傳輸鏈路的安全性上做了嘗試，對於內置的 Dubbo getty Server 提供了基於 TLS 的安全鏈路傳輸機制。"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"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":"爲儘可能保證應用啓動的靈活性，TLS Cert 的指定通過配置文件方式，具體請參見 Dubbo-go 配置讀取規則與 TLS 示例："}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"heading","attrs":{"align":null,"level":1},"content":[{"type":"text","text":"4 路由功能增強"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"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":"本次路由功能重點支持了 動態標籤路由 和 應用/服務級條件路由。"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"heading","attrs":{"align":null,"level":2},"content":[{"type":"text","text":"4.1 動態標籤路由"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"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":"標籤路由通過將某一個或多個服務的提供者劃分到同一個分組，約束流量只在指定分組中流轉，從而實現流量隔離的目的，可以作爲藍綠髮布、灰度發佈等場景的能力基礎。"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"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":"標籤主要是指對 Provider 端應用實例的分組，目前有兩種方式可以完成實例分組，分別是"},{"type":"codeinline","content":[{"type":"text","text":"動態規則打標"}]},{"type":"text","text":"和"},{"type":"codeinline","content":[{"type":"text","text":"靜態規則打標"}]},{"type":"text","text":"，其中動態規則相較於靜態規則優先級更高，而當兩種規則同時存在且出現衝突時，將以動態規則爲準。"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"heading","attrs":{"align":null,"level":3},"content":[{"type":"text","text":"4.1.1 動態規則打標"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"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":"可隨時在"},{"type":"link","attrs":{"href":"http://dubbo.apache.org/zh-cn/docs/user/demos/routing-rule.html","title":""},"content":[{"type":"text","text":"服務治理控制檯"}]},{"type":"text","text":"下發標籤歸組規則"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"codeblock","attrs":{"lang":"yml"},"content":[{"type":"text","text":"# governance-tagrouter-provider應用增加了兩個標籤分組tag1和tag2\n# tag1包含一個實例 127.0.0.1:20880\n# tag2包含一個實例 127.0.0.1:20881\n---\n force: false\n runtime: true\n enabled: true\n key: governance-tagrouter-provider\n tags:\n - name: tag1\n addresses: [\"127.0.0.1:20880\"]\n - name: tag2\n addresses: [\"127.0.0.1:20881\"]\n ..."}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"heading","attrs":{"align":null,"level":3},"content":[{"type":"text","text":"4.1.2 靜態規則打標"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"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":"可以在 server 配置文件的 tag 字段裏設置"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"codeblock","attrs":{"lang":"yml"},"content":[{"type":"text","text":"services:\n \"UserProvider\":\n registry: \"hangzhouzk\"\n protocol : \"dubbo\"\n interface : \"com.ikurento.user.UserProvider\"\n loadbalance: \"random\"\n warmup: \"100\"\n tag: \"beijing\"\n cluster: \"failover\"\n methods:\n - name: \"GetUser\"\n retries: 1\n loadbalance: \"random\""}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"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":"consumer  添加 tag 至 attachment 即可"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"codeblock","attrs":{"lang":"go"},"content":[{"type":"text","text":"ctx := context.Background()\nattachment := make(map[string]string)\nattachment[\"dubbo.tag\"] = \"beijing\"\nctx = context.WithValue(ctx, constant.AttachmentKey, attachment)\nerr := userProvider.GetUser(ctx, []interface{}{\"A001\"}, user)"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"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":"請求標籤的作用域爲每一次 invocation，使用 attachment 來傳遞請求標籤，注意保存在 attachment 中的值將會在一次完整的遠程調用中持續傳遞，得益於這樣的特性，我們只需要在起始調用時，通過一行代碼的設置，達到標籤的持續傳遞。"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"heading","attrs":{"align":null,"level":3},"content":[{"type":"text","text":"4.1.3 規則詳解"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"heading","attrs":{"align":null,"level":4},"content":[{"type":"text","text":"格式"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"bulletedlist","content":[{"type":"listitem","content":[{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"codeinline","content":[{"type":"text","text":"Key"}]},{"type":"text","text":"明確規則體作用到哪個應用。"},{"type":"text","marks":[{"type":"strong"}],"text":"必填"},{"type":"text","text":"。"}]}]},{"type":"listitem","content":[{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"codeinline","content":[{"type":"text","text":"enabled=true"}]},{"type":"text","text":" 當前路由規則是否生效，可不填，缺省生效。"}]}]},{"type":"listitem","content":[{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"codeinline","content":[{"type":"text","text":"force=false"}]},{"type":"text","text":" 當路由結果爲空時，是否強制執行，如果不強制執行，路由結果爲空的路由規則將自動失效，可不填，缺省爲 "},{"type":"codeinline","content":[{"type":"text","text":"false"}]},{"type":"text","text":"。"}]}]},{"type":"listitem","content":[{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"codeinline","content":[{"type":"text","text":"runtime=false"}]},{"type":"text","text":" 是否在每次調用時執行路由規則，否則只在提供者地址列表變更時預先執行並緩存結果，調用時直接從緩存中獲取路由結果。如果用了參數路由，必須設爲 "},{"type":"codeinline","content":[{"type":"text","text":"true"}]},{"type":"text","text":"，需要注意設置會影響調用的性能，可不填，缺省爲 "},{"type":"codeinline","content":[{"type":"text","text":"false"}]},{"type":"text","text":"。"}]}]},{"type":"listitem","content":[{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"codeinline","content":[{"type":"text","text":"priority=1"}]},{"type":"text","text":" 路由規則的優先級，用於排序，優先級越大越靠前執行，可不填，缺省爲 "},{"type":"codeinline","content":[{"type":"text","text":"0"}]},{"type":"text","text":"。"}]}]},{"type":"listitem","content":[{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"codeinline","content":[{"type":"text","text":"tags"}]},{"type":"text","text":" 定義具體的標籤分組內容，可定義任意n（n>=1）個標籤併爲每個標籤指定實例列表。"},{"type":"text","marks":[{"type":"strong"}],"text":"必填"}]}]}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":" - name， 標籤名稱"}]},{"type":"bulletedlist","content":[{"type":"listitem","content":[{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"addresses， 當前標籤包含的實例列表"}]}]}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"heading","attrs":{"align":null,"level":4},"content":[{"type":"text","text":"降級約定"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"numberedlist","attrs":{"start":"1","normalizeStart":1},"content":[{"type":"listitem","content":[{"type":"paragraph","attrs":{"indent":0,"number":1,"align":null,"origin":null},"content":[{"type":"codeinline","content":[{"type":"text","text":"request.tag=tag1"}]},{"type":"text","text":" 時優先選擇 標記了 "},{"type":"codeinline","content":[{"type":"text","text":"tag=tag1"}]},{"type":"text","text":" 的 provider。若集羣中不存在與請求標記對應的服務，默認將降級請求 tag 爲空的 provider；如果要改變這種默認行爲，即找不到匹配 tag1 的 provider 返回異常，需設置"},{"type":"codeinline","content":[{"type":"text","text":"request.tag.force=true"}]},{"type":"text","text":"。"}]}]},{"type":"listitem","content":[{"type":"paragraph","attrs":{"indent":0,"number":2,"align":null,"origin":null},"content":[{"type":"codeinline","content":[{"type":"text","text":"request.tag"}]},{"type":"text","text":" 未設置時，只會匹配 tag 爲空的 provider。即使集羣中存在可用的服務，若 tag 不匹配也就無法調用，這與約定 1 不同，攜帶標籤的請求可以降級訪問到無標籤的服務，但不攜帶標籤/攜帶其他種類標籤的請求永遠無法訪問到其他標籤的服務。"}]}]}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"heading","attrs":{"align":null,"level":2},"content":[{"type":"text","text":" 4.2 應用/服務級條件路由"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"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":"您可以在路由規則配置中配置多個條件路由及其粒度"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"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":"Sample:"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"codeblock","attrs":{"lang":""},"content":[{"type":"text","text":"# dubbo router yaml configure file\nrouterRules: \n - scope: application\n key: BDTService\n priority: 1\n enable: false\n force: true\n conditions : [\"host = 192.168.199.208 => host = 192.168.199.208 \"]\n - scope: service\n key: com.ikurento.user.UserProvider\n priority: 1\n force: true\n conditions : [\"host = 192.168.199.208 => host = 192.168.199.208 \"]"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"heading","attrs":{"align":null,"level":3},"content":[{"type":"text","text":"4.2.1 規則詳解"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"heading","attrs":{"align":null,"level":4},"content":[{"type":"text","text":"各字段含義"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"bulletedlist","content":[{"type":"listitem","content":[{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"scope表示路由規則的作用粒度，scope的取值會決定key的取值。必填。"}]}]}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":" - service 服務粒度"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":" - application 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false。"}]}]},{"type":"listitem","content":[{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"runtime=false 是否在每次調用時執行路由規則，否則只在提供者地址列表變更時預先執行並緩存結果，調用時直接從緩存中獲取路由結果。如果用了參數路由，必須設爲 true，需要注意設置會影響調用的性能，可不填，缺省爲 false。"}]}]},{"type":"listitem","content":[{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"priority=1 路由規則的優先級，用於排序，優先級越大越靠前執行，可不填，缺省爲 0。"}]}]},{"type":"listitem","content":[{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"conditions 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