org.kie.hacep.core.infra.consumer

Class DefaultKafkaConsumer<T>

java.lang.Object

org.kie.hacep.core.infra.consumer.DefaultKafkaConsumer<T>

All Implemented Interfaces:

EventConsumer, LeadershipCallback

public class DefaultKafkaConsumer<T>
extends Object
implements EventConsumer

The default consumer relies on the Consumer thread and is based on the loop around poll method.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	DefaultKafkaConsumer.PolledTopic

Field Summary

Fields

Modifier and Type	Field and Description
protected DroolsConsumerHandler	consumerHandler
protected ConsumerUtilsCore	consumerUtilsCore
protected EnvConfig	envConfig
protected org.apache.kafka.clients.consumer.Consumer<String,T>	kafkaConsumer
protected org.apache.kafka.clients.consumer.Consumer<String,T>	kafkaSecondaryConsumer
static String	PRIMARY_CONSUMER
protected Producer	producer
static String	SECONDARY_CONSUMER
protected DefaultSessionSnapShooter	snapShooter
protected SnapshotOnDemandUtils	snapshotOnDemandUtils

Constructor Summary

Constructors

Constructor and Description
DefaultKafkaConsumer()
DefaultKafkaConsumer(EnvConfig config, Producer producer, SnapshotOnDemandUtils snapshotOnDemandUtils)

Method Summary

Modifier and Type	Method and Description
protected boolean	askAndProcessSnapshotOnDemand(SnapshotInfos snapshotInfos)
protected void	assign()
protected void	assignAndStartConsume()
protected void	assignAsALeader()
protected void	assignConsumer(org.apache.kafka.clients.consumer.Consumer<String,T> kafkaConsumer, String topic)
protected void	assignReplica()
protected void	consume()
protected void	consumeControlFromBufferAsAReplica()
protected void	consumeEventsFromBufferAsALeader()
protected void	consumeEventsFromBufferAsAReplica()
protected void	defaultProcessAsAReplica()
protected void	defaultProcessAsLeader()
protected void	enableConsumeAndStartLoop(State state)
protected void	handleSnapshotBetweenIteration(org.apache.kafka.clients.consumer.ConsumerRecord<String,T> record)
void	initConsumer(ConsumerHandler consumerHandler)
void	initKafkaConsumer()
void	poll()
protected void	pollControl()
protected void	pollEvents()
protected void	processControlAsAReplica(org.apache.kafka.clients.consumer.ConsumerRecord<String,T> record)
protected void	processEventsAsAReplica(org.apache.kafka.clients.consumer.ConsumerRecord<String,T> record)
protected void	processLeader(org.apache.kafka.clients.consumer.ConsumerRecord<String,T> record)
protected void	restart(State state)
protected void	restartConsumer()
protected void	saveOffset(org.apache.kafka.clients.consumer.ConsumerRecord<String,T> record, org.apache.kafka.clients.consumer.Consumer<String,T> kafkaConsumer)
protected void	setLastProcessedKey()
protected void	settingsOnAEmptyControlTopic(ControlMessage lastWrapper)
protected void	startConsume()
void	stop()
protected void	stopConsume()
void	updateKafkaSecondaryConsumer()
protected void	updateOnRunningConsumer(State state)
void	updateStatus(State state)

Methods inherited from class java.lang.Object

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

Field Detail

SECONDARY_CONSUMER

public static final String SECONDARY_CONSUMER

See Also:

Constant Field Values

PRIMARY_CONSUMER

public static final String PRIMARY_CONSUMER

See Also:

Constant Field Values

kafkaConsumer

protected org.apache.kafka.clients.consumer.Consumer<String,T> kafkaConsumer

kafkaSecondaryConsumer

protected org.apache.kafka.clients.consumer.Consumer<String,T> kafkaSecondaryConsumer

consumerHandler

protected DroolsConsumerHandler consumerHandler

snapShooter

protected DefaultSessionSnapShooter snapShooter

envConfig

protected EnvConfig envConfig

producer

protected Producer producer

consumerUtilsCore

protected ConsumerUtilsCore consumerUtilsCore

snapshotOnDemandUtils

protected SnapshotOnDemandUtils snapshotOnDemandUtils

Constructor Detail

DefaultKafkaConsumer

public DefaultKafkaConsumer()

DefaultKafkaConsumer

public DefaultKafkaConsumer(EnvConfig config,
                            Producer producer,
                            SnapshotOnDemandUtils snapshotOnDemandUtils)

Method Detail

initKafkaConsumer

public void initKafkaConsumer()

updateKafkaSecondaryConsumer

public void updateKafkaSecondaryConsumer()

initConsumer

public void initConsumer(ConsumerHandler consumerHandler)

Specified by:

initConsumer in interface EventConsumer

restartConsumer

protected void restartConsumer()

stop

public void stop()

Specified by:

stop in interface EventConsumer

updateStatus

public void updateStatus(State state)

Specified by:

updateStatus in interface LeadershipCallback

askAndProcessSnapshotOnDemand

protected boolean askAndProcessSnapshotOnDemand(SnapshotInfos snapshotInfos)

assign

protected void assign()

assignAsALeader

protected void assignAsALeader()

assignReplica

protected void assignReplica()

assignConsumer

protected void assignConsumer(org.apache.kafka.clients.consumer.Consumer<String,T> kafkaConsumer,
                              String topic)

poll

public void poll()

Specified by:

poll in interface EventConsumer

updateOnRunningConsumer

protected void updateOnRunningConsumer(State state)

restart

protected void restart(State state)

enableConsumeAndStartLoop

protected void enableConsumeAndStartLoop(State state)

setLastProcessedKey

protected void setLastProcessedKey()

settingsOnAEmptyControlTopic

protected void settingsOnAEmptyControlTopic(ControlMessage lastWrapper)

assignAndStartConsume

protected void assignAndStartConsume()

consume

protected void consume()

defaultProcessAsLeader

protected void defaultProcessAsLeader()

processLeader

protected void processLeader(org.apache.kafka.clients.consumer.ConsumerRecord<String,T> record)

consumeEventsFromBufferAsALeader

protected void consumeEventsFromBufferAsALeader()

handleSnapshotBetweenIteration

protected void handleSnapshotBetweenIteration(org.apache.kafka.clients.consumer.ConsumerRecord<String,T> record)

defaultProcessAsAReplica

protected void defaultProcessAsAReplica()

consumeEventsFromBufferAsAReplica

protected void consumeEventsFromBufferAsAReplica()

consumeControlFromBufferAsAReplica

protected void consumeControlFromBufferAsAReplica()

processEventsAsAReplica

protected void processEventsAsAReplica(org.apache.kafka.clients.consumer.ConsumerRecord<String,T> record)

processControlAsAReplica

protected void processControlAsAReplica(org.apache.kafka.clients.consumer.ConsumerRecord<String,T> record)

saveOffset

protected void saveOffset(org.apache.kafka.clients.consumer.ConsumerRecord<String,T> record,
                          org.apache.kafka.clients.consumer.Consumer<String,T> kafkaConsumer)

startConsume

protected void startConsume()

stopConsume

protected void stopConsume()

pollControl

protected void pollControl()

pollEvents

protected void pollEvents()