/**
* 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.kafka;
import java.util.Properties;
import kafka.javaapi.producer.Producer;
import kafka.producer.KeyedMessage;
import kafka.producer.ProducerConfig;
import org.apache.camel.CamelException;
import org.apache.camel.CamelExchangeException;
import org.apache.camel.Exchange;
import org.apache.camel.impl.DefaultProducer;
/**
*
*/
public class KafkaProducer extends DefaultProducer {
protected Producer<String, String> producer;
private final KafkaEndpoint endpoint;
public KafkaProducer(KafkaEndpoint endpoint) {
super(endpoint);
this.endpoint = endpoint;
}
@Override
protected void doStop() throws Exception {
if (producer != null) {
producer.close();
}
}
Properties getProps() {
Properties props = new Properties();
props.put("metadata.broker.list", endpoint.getBrokers());
props.put("serializer.class", "kafka.serializer.StringEncoder");
props.put("partitioner.class", endpoint.getPartitioner());
props.put("request.required.acks", "1");
return props;
}
@Override
protected void doStart() throws Exception {
Properties props = getProps();
ProducerConfig config = new ProducerConfig(props);
producer = new Producer<String, String>(config);
}
@Override
public void process(Exchange exchange) throws CamelException {
Object partitionKey = exchange.getIn().getHeader(KafkaConstants.PARTITION_KEY);
if (partitionKey == null) {
throw new CamelExchangeException("No partition key set", exchange);
}
String msg = exchange.getIn().getBody(String.class);
KeyedMessage<String, String> data = new KeyedMessage<String, String>(endpoint.getTopic(), partitionKey.toString(), msg);
producer.send(data);
}
}