程序包 org.apache.pulsar.common.policies.data

枚举 SchemaAutoUpdateCompatibilityStrategy

    • 枚举常量概要

      枚举常量 
      枚举常量 说明
      AlwaysCompatible
      Always Compatible - The new schema will not be checked for compatibility against old schemas.
      AutoUpdateDisabled
      Don't allow any auto updates.
      Backward
      Messages written in the previous schema can be read by the new schema.
      BackwardTransitive
      Be similar to Backward.
      Forward
      Messages written in the new schema can be read by the previous schema.
      ForwardTransitive
      Be similar to Forward, ForwardTransitive ensure new schema can be ready by all previous version schema.
      Full
      Backward and Forward.
      FullTransitive
      BackwardTransitive and ForwardTransitive.

    • 方法概要

      所有方法 静态方法 具体方法 
      修饰符和类型 方法 说明
      static SchemaAutoUpdateCompatibilityStrategy valueOf​(java.lang.String name)
      返回带有指定名称的该类型的枚举常量。
      static SchemaAutoUpdateCompatibilityStrategy[] values()
      按照声明该枚举类型的常量的顺序, 返回 包含这些常量的数组。

      • 从类继承的方法 java.lang.Enum

        clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

      • 从类继承的方法 java.lang.Object

        getClass, notify, notifyAll, wait, wait, wait

    • 枚举常量详细资料

      • Backward

        public static final SchemaAutoUpdateCompatibilityStrategy Backward
        Messages written in the previous schema can be read by the new schema. To be backward compatible, the new schema must not add any new fields that don't have default values. However, it may remove fields.

      • Forward

        public static final SchemaAutoUpdateCompatibilityStrategy Forward
        Messages written in the new schema can be read by the previous schema. To be forward compatible, the new schema must not remove any fields which don't have default values in the previous schema. However, it may add new fields.

      • AlwaysCompatible

        public static final SchemaAutoUpdateCompatibilityStrategy AlwaysCompatible
        Always Compatible - The new schema will not be checked for compatibility against old schemas. In other words, new schemas will always be marked assumed compatible.

      • BackwardTransitive

        public static final SchemaAutoUpdateCompatibilityStrategy BackwardTransitive
        Be similar to Backward. BackwardTransitive ensure all previous version schema can be read by the new schema.

      • ForwardTransitive

        public static final SchemaAutoUpdateCompatibilityStrategy ForwardTransitive
        Be similar to Forward, ForwardTransitive ensure new schema can be ready by all previous version schema.

    • 方法详细资料

      • values

        public static SchemaAutoUpdateCompatibilityStrategy[] values()
        按照声明该枚举类型的常量的顺序, 返回 包含这些常量的数组。该方法可用于迭代 常量, 如下所示: 
        for (SchemaAutoUpdateCompatibilityStrategy c : SchemaAutoUpdateCompatibilityStrategy.values())
    System.out.println(c);
        返回:
        按照声明该枚举类型的常量的顺序返回的包含这些常量的数组

      • valueOf

        public static SchemaAutoUpdateCompatibilityStrategy valueOf​(java.lang.String name)
        返回带有指定名称的该类型的枚举常量。 字符串必须与用于声明该类型的枚举常量的 标识符完全匹配。(不允许有多余 的空格字符。)
        参数:
        name - 要返回的枚举常量的名称。
        返回:
        返回带有指定名称的枚举常量
        抛出:
        java.lang.IllegalArgumentException - 如果该枚举类型没有带有指定名称的常量
        java.lang.NullPointerException - 如果参数为空值