Package org.apache.camel.processor.resume.kafka

Class AbstractKafkaResumeStrategy<K,V>

java.lang.Object

org.apache.camel.processor.resume.kafka.AbstractKafkaResumeStrategy<K,V>

All Implemented Interfaces:

AutoCloseable, org.apache.camel.Service, org.apache.camel.UpdatableConsumerResumeStrategy<K,V,org.apache.camel.Resumable<K,V>>

public abstract class AbstractKafkaResumeStrategy<K,V>
extends Object
implements org.apache.camel.UpdatableConsumerResumeStrategy<K,V,org.apache.camel.Resumable<K,V>>, org.apache.camel.Service

Field Summary

Fields

Modifier and Type	Field	Description
static int	UNLIMITED

Constructor Summary

Constructors

Constructor	Description
AbstractKafkaResumeStrategy(String bootstrapServers, String topic, org.apache.camel.ResumeCache<K,V> resumeCache)
AbstractKafkaResumeStrategy(String topic, org.apache.camel.ResumeCache<K,V> resumeCache, Properties producerConfig, Properties consumerConfig)

Method Summary

Modifier and Type	Method	Description
void	build()
void	checkAndSubscribe(String topic)
void	checkAndSubscribe(String topic, long remaining)
void	close()
org.apache.kafka.clients.consumer.ConsumerRecords<K,V>	consume()	Consumes message from the given topic until the predicate returns false
org.apache.kafka.clients.consumer.ConsumerRecords<K,V>	consume(int retries)
static Properties	createConsumer(String bootstrapServers)	Creates a basic string-based consumer
static Properties	createProducer(String bootstrapServers)	Creates a basic string-based producer
protected org.apache.kafka.clients.consumer.Consumer<K,V>	getConsumer()
long	getErrorCount()
Duration	getPollDuration()
protected org.apache.kafka.clients.producer.Producer<K,V>	getProducer()
List<Future<org.apache.kafka.clients.producer.RecordMetadata>>	getSentItems()
void	init()
protected void	loadCache()
void	produce(K key, V message)	Sends data to a topic
void	setPollDuration(Duration pollDuration)
void	start()
void	stop()
abstract void	subscribe()
void	unsubscribe()
void	updateLastOffset(org.apache.camel.Resumable<K,V> offset)

Methods inherited from class java.lang.Object

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

Field Detail

UNLIMITED

public static final int UNLIMITED

See Also:

Constant Field Values

Constructor Detail

AbstractKafkaResumeStrategy

public AbstractKafkaResumeStrategy(String bootstrapServers,
                                   String topic,
                                   org.apache.camel.ResumeCache<K,V> resumeCache)

AbstractKafkaResumeStrategy

public AbstractKafkaResumeStrategy(String topic,
                                   org.apache.camel.ResumeCache<K,V> resumeCache,
                                   Properties producerConfig,
                                   Properties consumerConfig)

Method Detail

createProducer

public static Properties createProducer(String bootstrapServers)

Creates a basic string-based producer

Parameters:

bootstrapServers - the Kafka host

Returns:

A set of default properties for producing string-based key/pair records from Kafka

createConsumer

public static Properties createConsumer(String bootstrapServers)

Creates a basic string-based consumer

Parameters:

bootstrapServers - the Kafka host

Returns:

A set of default properties for consuming string-based key/pair records from Kafka

produce

public void produce(K key,
                    V message)
             throws ExecutionException,
                    InterruptedException

Sends data to a topic

Parameters:

message - the message to send

Throws:

ExecutionException

InterruptedException

updateLastOffset

public void updateLastOffset(org.apache.camel.Resumable<K,V> offset)
                      throws Exception

Specified by:

updateLastOffset in interface org.apache.camel.UpdatableConsumerResumeStrategy<K,V,org.apache.camel.Resumable<K,V>>

Throws:

Exception

loadCache

protected void loadCache()
                  throws Exception

Throws:

Exception

checkAndSubscribe

public void checkAndSubscribe(String topic)

Parameters:

topic - the topic to consume the messages from

checkAndSubscribe

public void checkAndSubscribe(String topic,
                              long remaining)

Parameters:

topic - the topic to consume the messages from

subscribe

public abstract void subscribe()
                        throws Exception

Throws:

Exception

unsubscribe

public void unsubscribe()

consume

public org.apache.kafka.clients.consumer.ConsumerRecords<K,V> consume()

Consumes message from the given topic until the predicate returns false

Returns:

consume

public org.apache.kafka.clients.consumer.ConsumerRecords<K,V> consume(int retries)

getErrorCount

public long getErrorCount()

getSentItems

public List<Future<org.apache.kafka.clients.producer.RecordMetadata>> getSentItems()

build

public void build()

Specified by:

build in interface org.apache.camel.Service

init

public void init()

Specified by:

init in interface org.apache.camel.Service

stop

public void stop()

Specified by:

stop in interface org.apache.camel.Service

close

public void close()
           throws IOException

Specified by:

close in interface AutoCloseable

Specified by:

close in interface org.apache.camel.Service

Throws:

IOException

start

public void start()

Specified by:

start in interface org.apache.camel.Service

getPollDuration

public Duration getPollDuration()

setPollDuration

public void setPollDuration(Duration pollDuration)

getConsumer

protected org.apache.kafka.clients.consumer.Consumer<K,V> getConsumer()

getProducer

protected org.apache.kafka.clients.producer.Producer<K,V> getProducer()