i have tried wikifeed example with Kafka 2_12.1.0.0.the count method is now
depricated ,
previously in kafka_2.11-0.10.2.1 i have given count(localStateStoreName).
how to give the statestore name in Kafka 2_12.1.0.0.
i have attached the code below,
package kafka.examples.wikifeed;
import org.apache.kafka.clients.consumer.ConsumerConfig;
import org.apache.kafka.common.serialization.Serdes;
import org.apache.kafka.streams.KafkaStreams;
import org.apache.kafka.streams.KeyValue;
import org.apache.kafka.streams.StreamsBuilder;
import org.apache.kafka.streams.StreamsConfig;
import org.apache.kafka.streams.kstream.KStream;
import org.apache.kafka.streams.kstream.KTable;
import org.apache.kafka.streams.kstream.Produced;
import java.util.Properties;
/**
* Created by PravinKumar on 29/7/17.
*/
public class WikifeedLambdaexample {
final static String WIKIFEED_INPUT="wikifeedInput";
final static String WIKIFEED_OUTPUT="wikifeedOutput";
final static String WIKIFEED_LAMBDA="WikiFeedLambda";
final static String BOOTSTRAP_SERVERS="localhost:9092";
final static String COUNT_STORE="countstore";
final static String STAT_DIR="/home/admin/Documents/kafka_2.12.1.0.0/kafka-streams";
public static void main(String[] args) {
KafkaStreams kafkaStreams=getWikifeedStreams();
kafkaStreams.cleanUp();
kafkaStreams.start();
Runtime.getRuntime().addShutdownHook(new Thread(kafkaStreams::close));
}
public static KafkaStreams getWikifeedStreams(){
Properties properties=new Properties();
properties.put(StreamsConfig.APPLICATION_ID_CONFIG,WIKIFEED_LAMBDA);
properties.put(StreamsConfig.BOOTSTRAP_SERVERS_CONFIG,BOOTSTRAP_SERVERS);
properties.put(StreamsConfig.DEFAULT_KEY_SERDE_CLASS_CONFIG, Serdes.String().getClass().getName());
properties.put(StreamsConfig.DEFAULT_VALUE_SERDE_CLASS_CONFIG,WikifeedSerde.class);
properties.put(StreamsConfig.STATE_DIR_CONFIG,STAT_DIR);
properties.put(StreamsConfig.COMMIT_INTERVAL_MS_CONFIG,500);
properties.put(ConsumerConfig.AUTO_OFFSET_RESET_CONFIG, "earliest");
StreamsBuilder builder= new StreamsBuilder();
KStream<String,Wikifeed> inputStream=builder.stream(WIKIFEED_INPUT);
KTable<String,Long> kTable=inputStream
.filter((key, value) -> value.isNew())
.map(((key, value) -> KeyValue.pair(value.getName(),value)))
.groupByKey()
.count(COUNT_STORE);
kTable.toStream().to(WIKIFEED_OUTPUT, Produced.with(Serdes.String(), Serdes.Long()));
KafkaStreams streams= new KafkaStreams(builder.build(),properties);
return streams;
}
}