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                合規國際互聯網加速 OSASE為企業客戶提供高速穩定SD-WAN國際加速解決方案。 廣告
                ZooKeeper除了提供了針對ZNode的標準增刪改查的API接口,還提供了監聽ZNode變化的實時通知接口——Watch接口,應用可以選擇任意ZNode進行監聽,如果被監聽的ZNode或者其Child發生變化,則應用可以實時收到通知 ### Watch事件類型 ZOO_CREATED_EVENT:節點創建事件,需要watch一個不存在的節點,當節點被創建時觸發,此watch通過zoo_exists()設置 ZOO_DELETED_EVENT:節點刪除事件,此watch通過zoo_exists()或zoo_get()設置 ZOO_CHANGED_EVENT:節點數據改變事件,此watch通過zoo_exists()或zoo_get()設置 ZOO_CHILD_EVENT:子節點列表改變事件,此watch通過zoo_get_children()或zoo_get_children2()設置 ZOO_SESSION_EVENT:會話失效事件,客戶端與服務端斷開或重連時觸發 ZOO_NOTWATCHING_EVENT:watch移除事件,服務端出于某些原因不再為客戶端watch節點時觸發
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