org.apache.flink.connector.kafka.source.enumerator.initializer

Class NoStoppingOffsetsInitializer

java.lang.Object

org.apache.flink.connector.kafka.source.enumerator.initializer.NoStoppingOffsetsInitializer

All Implemented Interfaces:

Serializable, OffsetsInitializer

@Internal
public class NoStoppingOffsetsInitializer
extends Object
implements OffsetsInitializer

An implementation of OffsetsInitializer which does not initialize anything.

This class is used as the default stopping offsets initializer for unbounded Kafka sources.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.flink.connector.kafka.source.enumerator.initializer.OffsetsInitializer

OffsetsInitializer.PartitionOffsetsRetriever

Constructor Summary

Constructors

Constructor and Description
NoStoppingOffsetsInitializer()

Method Summary

Modifier and Type	Method and Description
org.apache.kafka.clients.consumer.OffsetResetStrategy	getAutoOffsetResetStrategy() Get the auto offset reset strategy in case the initialized offsets falls out of the range.
Map<org.apache.kafka.common.TopicPartition,Long>	getPartitionOffsets(Collection<org.apache.kafka.common.TopicPartition> partitions, OffsetsInitializer.PartitionOffsetsRetriever partitionOffsetsRetriever) Get the initial offsets for the given Kafka partitions.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.apache.flink.connector.kafka.source.enumerator.initializer.OffsetsInitializer

committedOffsets, committedOffsets, earliest, latest, offsets, offsets, timestamp

Constructor Detail

NoStoppingOffsetsInitializer

public NoStoppingOffsetsInitializer()

Method Detail

getPartitionOffsets

public Map<org.apache.kafka.common.TopicPartition,Long> getPartitionOffsets(Collection<org.apache.kafka.common.TopicPartition> partitions,
                                                                            OffsetsInitializer.PartitionOffsetsRetriever partitionOffsetsRetriever)

Description copied from interface: OffsetsInitializer

Get the initial offsets for the given Kafka partitions. These offsets will be used as either starting offsets or stopping offsets of the Kafka partitions.

If the implementation returns a starting offset which causes OffsetsOutOfRangeException from Kafka. The OffsetResetStrategy provided by the OffsetsInitializer.getAutoOffsetResetStrategy() will be used to reset the offset.

Specified by:

getPartitionOffsets in interface OffsetsInitializer

Parameters:

partitions - the Kafka partitions to get the starting offsets.

partitionOffsetsRetriever - a helper to retrieve information of the Kafka partitions.

Returns:

A mapping from Kafka partition to their offsets to start consuming from.

getAutoOffsetResetStrategy

public org.apache.kafka.clients.consumer.OffsetResetStrategy getAutoOffsetResetStrategy()

Description copied from interface: OffsetsInitializer

Get the auto offset reset strategy in case the initialized offsets falls out of the range.

The OffsetStrategy is only used when the offset initializer is used to initialize the starting offsets and the starting offsets is out of range.

Specified by:

getAutoOffsetResetStrategy in interface OffsetsInitializer

Returns:

An OffsetResetStrategy to use if the initialized offsets are out of the range.