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

Class SingleNodeKafkaResumeStrategy

  • All Implemented Interfaces:
    AutoCloseable, org.apache.camel.CamelContextAware, KafkaResumeStrategy, org.apache.camel.resume.ResumeStrategy, org.apache.camel.Service
    @JdkService("kafka-resume-strategy")
public class SingleNodeKafkaResumeStrategy
extends Object
implements KafkaResumeStrategy, org.apache.camel.CamelContextAware
    A resume strategy that publishes offsets to a Kafka topic. This resume strategy is suitable for single node integrations.

    • Nested Class Summary

      • Nested classes/interfaces inherited from interface org.apache.camel.resume.ResumeStrategy

        org.apache.camel.resume.ResumeStrategy.UpdateCallBack

    • Field Summary

      • Fields inherited from interface org.apache.camel.resume.ResumeStrategy

        DEFAULT_NAME

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      void build()  
      protected void checkAndSubscribe​(org.apache.kafka.clients.consumer.Consumer<byte[],​byte[]> consumer, String topic)
      Subscribe to the topic if not subscribed yet
      void checkAndSubscribe​(org.apache.kafka.clients.consumer.Consumer<byte[],​byte[]> consumer, String topic, long remaining)
      Subscribe to the topic if not subscribed yet
      void close()  
      protected org.apache.kafka.clients.consumer.ConsumerRecords<byte[],​byte[]> consume​(int retries, org.apache.kafka.clients.consumer.Consumer<byte[],​byte[]> consumer)
      Consumes message from the topic previously setup
      protected org.apache.kafka.clients.consumer.ConsumerRecords<byte[],​byte[]> consume​(org.apache.kafka.clients.consumer.Consumer<byte[],​byte[]> consumer)
      Consumes message from the topic previously setup
      protected void doAdd​(org.apache.camel.resume.OffsetKey<?> key, org.apache.camel.resume.Offset<?> offsetValue)  
      org.apache.camel.resume.ResumeAdapter getAdapter()  
      org.apache.camel.CamelContext getCamelContext()  
      Duration getPollDuration()  
      protected org.apache.kafka.clients.producer.Producer<byte[],​byte[]> getProducer()  
      org.apache.camel.resume.ResumeStrategyConfiguration getResumeStrategyConfiguration()  
      void init()  
      void loadCache()
      Loads the existing data into the cache
      protected void poll​(org.apache.kafka.clients.consumer.Consumer<byte[],​byte[]> consumer, CountDownLatch latch)  
      protected void produce​(byte[] key, byte[] message, org.apache.camel.resume.ResumeStrategy.UpdateCallBack updateCallBack)
      Sends data to a topic.
      void setAdapter​(org.apache.camel.resume.ResumeAdapter adapter)  
      void setCamelContext​(org.apache.camel.CamelContext camelContext)  
      void setPollDuration​(Duration pollDuration)  
      void setResumeStrategyConfiguration​(org.apache.camel.resume.ResumeStrategyConfiguration resumeStrategyConfiguration)  
      void start()  
      void stop()  
      void updateLastOffset​(org.apache.camel.resume.OffsetKey<?> offsetKey, org.apache.camel.resume.Offset<?> offset)  
      void updateLastOffset​(org.apache.camel.resume.OffsetKey<?> offsetKey, org.apache.camel.resume.Offset<?> offset, org.apache.camel.resume.ResumeStrategy.UpdateCallBack updateCallBack)  
      <T extends org.apache.camel.resume.Resumable>
      void      		 updateLastOffset​(T offset)  
      <T extends org.apache.camel.resume.Resumable>
      void      		 updateLastOffset​(T offset, org.apache.camel.resume.ResumeStrategy.UpdateCallBack updateCallBack)  

      • Methods inherited from interface org.apache.camel.resume.ResumeStrategy

        getAdapter

    • Constructor Detail

      • SingleNodeKafkaResumeStrategy

        public SingleNodeKafkaResumeStrategy()

      • SingleNodeKafkaResumeStrategy

        public SingleNodeKafkaResumeStrategy​(KafkaResumeStrategyConfiguration resumeStrategyConfiguration)
        Builds an instance of this class
        Parameters:
        resumeStrategyConfiguration - the configuration to use for this strategy instance

      • SingleNodeKafkaResumeStrategy

        public SingleNodeKafkaResumeStrategy​(KafkaResumeStrategyConfiguration resumeStrategyConfiguration,
                                     ExecutorService executorService)
        Builds an instance of this class
        Parameters:
        resumeStrategyConfiguration - the configuration to use for this strategy instance

    • Method Detail

      • produce

        protected void produce​(byte[] key,
                       byte[] message,
                       org.apache.camel.resume.ResumeStrategy.UpdateCallBack updateCallBack)
        Sends data to a topic. The records will always be sent asynchronously. If there's an error, a producer error counter will be increased.
        Parameters:
        message - the message to send

      • doAdd

        protected void doAdd​(org.apache.camel.resume.OffsetKey<?> key,
                     org.apache.camel.resume.Offset<?> offsetValue)

      • updateLastOffset

        public <T extends org.apache.camel.resume.Resumable> void updateLastOffset​(T offset)
                                                                    throws Exception
        Specified by:
        updateLastOffset in interface org.apache.camel.resume.ResumeStrategy
        Throws:
        Exception

      • updateLastOffset

        public <T extends org.apache.camel.resume.Resumable> void updateLastOffset​(T offset,
                                                                           org.apache.camel.resume.ResumeStrategy.UpdateCallBack updateCallBack)
                                                                    throws Exception
        Specified by:
        updateLastOffset in interface org.apache.camel.resume.ResumeStrategy
        Throws:
        Exception

      • updateLastOffset

        public void updateLastOffset​(org.apache.camel.resume.OffsetKey<?> offsetKey,
                             org.apache.camel.resume.Offset<?> offset)
                      throws Exception
        Specified by:
        updateLastOffset in interface org.apache.camel.resume.ResumeStrategy
        Throws:
        Exception

      • updateLastOffset

        public void updateLastOffset​(org.apache.camel.resume.OffsetKey<?> offsetKey,
                             org.apache.camel.resume.Offset<?> offset,
                             org.apache.camel.resume.ResumeStrategy.UpdateCallBack updateCallBack)
                      throws Exception
        Specified by:
        updateLastOffset in interface org.apache.camel.resume.ResumeStrategy
        Throws:
        Exception

      • loadCache

        public void loadCache()
        Loads the existing data into the cache
        Specified by:
        loadCache in interface org.apache.camel.resume.ResumeStrategy

      • poll

        protected void poll​(org.apache.kafka.clients.consumer.Consumer<byte[],​byte[]> consumer,
                    CountDownLatch latch)

      • checkAndSubscribe

        protected void checkAndSubscribe​(org.apache.kafka.clients.consumer.Consumer<byte[],​byte[]> consumer,
                                 String topic)
        Subscribe to the topic if not subscribed yet
        Parameters:
        topic - the topic to consume the messages from

      • checkAndSubscribe

        public void checkAndSubscribe​(org.apache.kafka.clients.consumer.Consumer<byte[],​byte[]> consumer,
                              String topic,
                              long remaining)
        Subscribe to the topic if not subscribed yet
        Parameters:
        topic - the topic to consume the messages from
        remaining - the number of messages to rewind from the last offset position (used to fill the cache)

      • consume

        protected org.apache.kafka.clients.consumer.ConsumerRecords<byte[],​byte[]> consume​(org.apache.kafka.clients.consumer.Consumer<byte[],​byte[]> consumer)
        Consumes message from the topic previously setup
        Returns:
        An instance of the consumer records

      • consume

        protected org.apache.kafka.clients.consumer.ConsumerRecords<byte[],​byte[]> consume​(int retries,
                                                                                         org.apache.kafka.clients.consumer.Consumer<byte[],​byte[]> consumer)
        Consumes message from the topic previously setup
        Parameters:
        retries - how many times to retry consuming data from the topic
        consumer - the kafka consumer object instance to use
        Returns:
        An instance of the consumer records

      • getAdapter

        public org.apache.camel.resume.ResumeAdapter getAdapter()
        Specified by:
        getAdapter in interface org.apache.camel.resume.ResumeStrategy

      • setAdapter

        public void setAdapter​(org.apache.camel.resume.ResumeAdapter adapter)
        Specified by:
        setAdapter in interface org.apache.camel.resume.ResumeStrategy

      • 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

      • start

        public void start()
        Specified by:
        start in interface org.apache.camel.Service

      • getPollDuration

        public Duration getPollDuration()

      • setPollDuration

        public void setPollDuration​(Duration pollDuration)

      • getProducer

        protected org.apache.kafka.clients.producer.Producer<byte[],​byte[]> getProducer()

      • setResumeStrategyConfiguration

        public void setResumeStrategyConfiguration​(org.apache.camel.resume.ResumeStrategyConfiguration resumeStrategyConfiguration)
        Specified by:
        setResumeStrategyConfiguration in interface org.apache.camel.resume.ResumeStrategy

      • getResumeStrategyConfiguration

        public org.apache.camel.resume.ResumeStrategyConfiguration getResumeStrategyConfiguration()
        Specified by:
        getResumeStrategyConfiguration in interface org.apache.camel.resume.ResumeStrategy

      • getCamelContext

        public org.apache.camel.CamelContext getCamelContext()
        Specified by:
        getCamelContext in interface org.apache.camel.CamelContextAware

      • setCamelContext

        public void setCamelContext​(org.apache.camel.CamelContext camelContext)
        Specified by:
        setCamelContext in interface org.apache.camel.CamelContextAware