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  • Zookeeper CreateMode

    通过CreateMode 可以设置在zookeeper中创建节点的类型,节点类型共有4种:

    EPHEMERAL:临时节点

    EPHEMERAL_SEQUENTIAL:有序的临时节点

    PERSISTENT:持久节点

    PERSISTENT_SEQUENTIAL:有序的持久节点

       /**
         * The znode will not be automatically deleted upon client's disconnect.
         */
        PERSISTENT (0, false, false),
    

      客户端断开连接的时候,不会自动删除节点

        /**
        * The znode will not be automatically deleted upon client's disconnect,
        * and its name will be appended with a monotonically increasing number.
        */
        PERSISTENT_SEQUENTIAL (2, false, true)
    

      客户端断开连接的时候,不会自动删除节点,并且会将节点名拼接一个自增值,例如:创建节点时path输入的是test,当客户端退出时path将变成test0000000001,该值(0000000001)会自动增长!

     /**
         * The znode will be deleted upon the client's disconnect.
         */
        EPHEMERAL (1, true, false)
    

      客户端断开连接的时候,将会自定删除节点

        /**
         * The znode will be deleted upon the client's disconnect, and its name
         * will be appended with a monotonically increasing number.
         */
        EPHEMERAL_SEQUENTIAL (3, true, true);
    

      客户端断开连接的时候,将会自定删除几点,并且将节点名拼接一个自增值(同上)

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  • 原文地址:https://www.cnblogs.com/shiguotao-com/p/9368672.html
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