omarsmak commented on a change in pull request #4723: URL: https://github.com/apache/camel/pull/4723#discussion_r536706816
########## File path: components/camel-vertx-kafka/camel-vertx-kafka-component/src/main/java/org/apache/camel/component/vertx/kafka/VertxKafkaConsumer.java ########## @@ -0,0 +1,118 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You 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 + * + * http://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 org.apache.camel.component.vertx.kafka; + +import io.vertx.kafka.client.consumer.KafkaConsumer; +import io.vertx.kafka.client.consumer.KafkaConsumerRecord; +import org.apache.camel.Exchange; +import org.apache.camel.ExtendedExchange; +import org.apache.camel.Processor; +import org.apache.camel.component.vertx.kafka.configuration.VertxKafkaConfiguration; +import org.apache.camel.component.vertx.kafka.operations.VertxKafkaConsumerOperations; +import org.apache.camel.spi.Synchronization; +import org.apache.camel.support.DefaultConsumer; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +public class VertxKafkaConsumer extends DefaultConsumer { + + private static final Logger LOG = LoggerFactory.getLogger(VertxKafkaConsumer.class); + + private KafkaConsumer<Object, Object> kafkaConsumer; + + public VertxKafkaConsumer(final VertxKafkaEndpoint endpoint, final Processor processor) { + super(endpoint, processor); + } + + @Override + protected void doStart() throws Exception { + super.doStart(); + + // create the consumer client + kafkaConsumer = KafkaConsumer.create(getEndpoint().getVertx(), getConfiguration().createConsumerConfiguration()); + + // create the consumer operation + final VertxKafkaConsumerOperations consumerOperations + = new VertxKafkaConsumerOperations(kafkaConsumer, getConfiguration()); + + // process our records + consumerOperations.receiveEvents(this::onEventListener, this::onErrorListener); + } + + @Override + protected void doStop() throws Exception { + if (kafkaConsumer != null) { + kafkaConsumer.close(); + } + + super.doStop(); + } + + public VertxKafkaConfiguration getConfiguration() { + return getEndpoint().getConfiguration(); + } + + @Override + public VertxKafkaEndpoint getEndpoint() { + return (VertxKafkaEndpoint) super.getEndpoint(); + } + + private void onEventListener(final KafkaConsumerRecord<Object, Object> record) { + final Exchange exchange = getEndpoint().createVertxKafkaExchange(record); + // set propagated headers + VertxKafkaHeadersPropagation.getPropagatedHeaders(record.headers(), exchange.getIn()) + .forEach((key, value) -> exchange.getIn().setHeader(key, value)); + + // add exchange callback + exchange.adapt(ExtendedExchange.class).addOnCompletion(new Synchronization() { + @Override + public void onComplete(Exchange exchange) { + // at the moment we don't commit the offsets manually, we can add it in the future + } + + @Override + public void onFailure(Exchange exchange) { + // we do nothing here + processRollback(exchange); + } + }); + // send message to next processor in the route + getAsyncProcessor().process(exchange, doneSync -> LOG.trace("Processing exchange [{}] done.", exchange)); + } + + private void onErrorListener(final Throwable error) { + final Exchange exchange = getEndpoint().createExchange(); Review comment: Ah good note. Didnt realize that it will be always null ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org
