Package org.apache.flink.connector.kafka.dynamic.source

Class MetadataUpdateEvent

java.lang.Object

org.apache.flink.connector.kafka.dynamic.source.MetadataUpdateEvent

All Implemented Interfaces:

Serializable, org.apache.flink.api.connector.source.SourceEvent

@Internal
public class MetadataUpdateEvent
extends Object
implements org.apache.flink.api.connector.source.SourceEvent

Signals DynamicKafkaSourceReader to stop their underlying readers. The restart process is as follows:

1. Detect metadata change in enumerator 2. Stop sub enumerators and don't snapshot state 3. Send this event to all readers 4. Stop sub readers and snapshot state (offsets) 5. Start new sub enumerators with clean state and do total split reassignment to readers 6. Readers obtain splits, starting sub readers dynamically, and do reconciliation of starting offsets with the cached offsets

We don't snapshot enumerator state because we want to reassign previously assigned splits. After restart, readers need to reinitialize the sub readers by using the received splits.

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
MetadataUpdateEvent(Set<KafkaStream> kafkaStreams)

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object o)
Set<KafkaStream>	getKafkaStreams()
int	hashCode()
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Details

MetadataUpdateEvent

public MetadataUpdateEvent(Set<KafkaStream> kafkaStreams)

Method Details

getKafkaStreams

public Set<KafkaStream> getKafkaStreams()

toString

public String toString()

Overrides:

toString in class Object

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object