Package org.apache.storm.kafka.spout
Enum FirstPollOffsetStrategy
- All Implemented Interfaces:
Serializable
,Comparable<FirstPollOffsetStrategy>
,java.lang.constant.Constable
Defines how the spout seeks the offset to be used in the first poll to Kafka upon topology deployment. By default this parameter is set
to UNCOMMITTED_EARLIEST.
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Nested Class Summary
Nested classes/interfaces inherited from class java.lang.Enum
Enum.EnumDesc<E extends Enum<E>>
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Enum Constant Summary
Enum ConstantDescriptionThe kafka spout polls records starting in the first offset of the partition, regardless of previous commits.The kafka spout polls records starting at the end of the partition, regardless of previous commits.The kafka spout polls records starting at the earliest offset whose timestamp is greater than or equal to the given startTimestamp.The kafka spout polls records from the last committed offset, if any.The kafka spout polls records from the last committed offset, if any.The kafka spout polls records from the last committed offset, if any. -
Method Summary
Modifier and TypeMethodDescriptionstatic FirstPollOffsetStrategy
Returns the enum constant of this type with the specified name.static FirstPollOffsetStrategy[]
values()
Returns an array containing the constants of this enum type, in the order they are declared.
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Enum Constant Details
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EARLIEST
The kafka spout polls records starting in the first offset of the partition, regardless of previous commits. This setting only takes effect on topology deployment -
LATEST
The kafka spout polls records starting at the end of the partition, regardless of previous commits. This setting only takes effect on topology deployment -
TIMESTAMP
The kafka spout polls records starting at the earliest offset whose timestamp is greater than or equal to the given startTimestamp. This setting only takes effect on topology deployment. This option is currently available only for the Trident Spout -
UNCOMMITTED_EARLIEST
The kafka spout polls records from the last committed offset, if any. If no offset has been committed it behaves as EARLIEST -
UNCOMMITTED_LATEST
The kafka spout polls records from the last committed offset, if any. If no offset has been committed it behaves as LATEST -
UNCOMMITTED_TIMESTAMP
The kafka spout polls records from the last committed offset, if any. If no offset has been committed it behaves as TIMESTAMP. This option is currently available only for the Trident Spout
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Method Details
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values
Returns an array containing the constants of this enum type, in the order they are declared.- Returns:
- an array containing the constants of this enum type, in the order they are declared
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valueOf
Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (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 type has no constant with the specified nameNullPointerException
- if the argument is null
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