Я использую Sprin облачную стрема Kstream.Я тестирую одну тему и одну @StreamListner.Это нормально.
Я изменяю свой код для двух входов KStream.(два @StreamListener) Но, ошибка весеннего облака ..
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APPLICATION FAILED TO START
***************************
Description:
The bean 'stream-builder-process', defined in null, could not be registered. A bean with that name has already been defined in null and overriding is disabled.
Action:
Consider renaming one of the beans or enabling overriding by setting spring.main.allow-bean-definition-overriding=true
Process finished with exit code 1
Первый слушатель
package com.kstream.spring.cloud.test1;
import static com.kstream.spring.cloud.test1.MyBinding.TOPIC1_IN;
import org.apache.avro.generic.GenericRecord;
import org.apache.kafka.streams.kstream.KStream;
import org.springframework.cloud.stream.annotation.Input;
import org.springframework.cloud.stream.annotation.StreamListener;
import org.springframework.stereotype.Component;
@Component
public class Topic1Source {
@StreamListener
public void process(@Input(TOPIC1_IN) KStream<String, GenericRecord> logs) {
logs
.foreach((key, value) -> {
System.out.println("Test Topic1 : " + value);
});
}
}
Только Первый слушатель в порядке.
Второй слушатель
package com.kstream.spring.cloud.test1;
import static com.kstream.spring.cloud.test1.MyBinding.TOPIC2_IN;
import org.apache.avro.generic.GenericRecord;
import org.apache.kafka.streams.kstream.KStream;
import org.springframework.cloud.stream.annotation.Input;
import org.springframework.cloud.stream.annotation.StreamListener;
import org.springframework.stereotype.Component;
@Component
public class Topic2Source {
@StreamListener
public void process(@Input(TOPIC2_IN) KStream<String, GenericRecord> logs) {
logs
.foreach((key, value) -> {
System.out.println("Test Topic2 : " + value);
});
}
}
Но это ошибка
application.properties
spring.application.name=kafka-streams-test
spring.kafka.bootstrap-servers=my brokers
# defaults
spring.cloud.stream.kafka.streams.binder.brokers=my brokers
spring.cloud.stream.kafka.streams.binder.configuration.commit.interval.ms=1000
spring.cloud.stream.kafka.streams.binder.configuration.schema.registry.url=my server
# topic1
spring.cloud.stream.bindings.topic1In.destination=topic1
spring.cloud.stream.bindings.topic1In.consumer.useNativeDecoding=true
spring.cloud.stream.bindings.topic1In.consumer.header-mode=raw
spring.cloud.stream.kafka.streams.bindings.topic1In.consumer.keySerde=org.apache.kafka.common.serialization.Serdes$StringSerde
spring.cloud.stream.kafka.streams.bindings.topic1In.consumer.valueSerde=io.confluent.kafka.streams.serdes.avro.SpecificAvroSerde
# topic2
spring.cloud.stream.bindings.topic2In.destination=topic2
spring.cloud.stream.bindings.topic2In.consumer.useNativeDecoding=true
spring.cloud.stream.bindings.topic2In.consumer.header-mode=raw
spring.cloud.stream.kafka.streams.bindings.topic2In.consumer.keySerde=org.apache.kafka.common.serialization.Serdes$StringSerde
spring.cloud.stream.kafka.streams.bindings.topic2In.consumer.valueSerde=io.confluent.kafka.streams.serdes.avro.SpecificAvroSerde