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Integration between Micronaut and Kafka Messaging
/*
* Copyright 2017-2020 original authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package io.micronaut.configuration.kafka.bind;
import io.micronaut.configuration.kafka.KafkaHeaders;
import io.micronaut.core.convert.ArgumentConversionContext;
import io.micronaut.core.convert.ConversionService;
import io.micronaut.core.type.Argument;
import io.micronaut.messaging.MessageHeaders;
import jakarta.inject.Singleton;
import org.apache.kafka.clients.consumer.ConsumerRecord;
import java.util.Optional;
/**
* Obtains the {@link MessageHeaders} object for Kafka.
*
* @author Graeme Rocher
* @since 1.0
*/
@Singleton
public class KafkaHeadersBinder implements TypedConsumerRecordBinder {
public static final Argument TYPE = Argument.of(MessageHeaders.class);
private final ConversionService conversionService;
public KafkaHeadersBinder(ConversionService conversionService) {
this.conversionService = conversionService;
}
@Override
public Argument argumentType() {
return TYPE;
}
@Override
public BindingResult bind(ArgumentConversionContext context, ConsumerRecord, ?> source) {
KafkaHeaders kafkaHeaders = new KafkaHeaders(source.headers(), conversionService);
return () -> Optional.of(kafkaHeaders);
}
}
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