Enum Class DataNodeLayoutVersion.Feature
java.lang.Object
java.lang.Enum<DataNodeLayoutVersion.Feature>
org.apache.hadoop.hdfs.server.datanode.DataNodeLayoutVersion.Feature
- All Implemented Interfaces:
Serializable,Comparable<DataNodeLayoutVersion.Feature>,Constable,LayoutVersion.LayoutFeature
- Enclosing class:
- DataNodeLayoutVersion
public static enum DataNodeLayoutVersion.Feature
extends Enum<DataNodeLayoutVersion.Feature>
implements LayoutVersion.LayoutFeature
Enums for features that change the layout version.
To add a new layout version:
To add a new layout version:
- Define a new enum constant with a short enum name, the new layout version and description of the added feature.
- When adding a layout version with an ancestor that is not same as its immediate predecessor, use the constructor where a specific ancestor can be passed.
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Nested Class Summary
Nested classes/interfaces inherited from class java.lang.Enum
Enum.EnumDesc<E extends Enum<E>> -
Enum Constant Summary
Enum Constants -
Method Summary
Modifier and TypeMethodDescriptiongetInfo()Returns the enum constant of this class with the specified name.static DataNodeLayoutVersion.Feature[]values()Returns an array containing the constants of this enum class, in the order they are declared.
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Enum Constant Details
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FIRST_LAYOUT
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BLOCKID_BASED_LAYOUT
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BLOCKID_BASED_LAYOUT_32_by_32
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Method Details
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values
Returns an array containing the constants of this enum class, in the order they are declared.- Returns:
- an array containing the constants of this enum class, in the order they are declared
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valueOf
Returns the enum constant of this class with the specified name. The string must match exactly an identifier used to declare an enum constant in this class. (Extraneous whitespace characters are not permitted.)- Parameters:
name- the name of the enum constant to be returned.- Returns:
- the enum constant with the specified name
- Throws:
IllegalArgumentException- if this enum class has no constant with the specified nameNullPointerException- if the argument is null
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getInfo
- Specified by:
getInfoin interfaceLayoutVersion.LayoutFeature
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