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/*******************************************************************************
* ============LICENSE_START=======================================================
* org.onap.dmaap
* ================================================================================
* Copyright © 2017 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* 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
* 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.
* ============LICENSE_END=========================================================
*
* ECOMP is a trademark and service mark of AT&T Intellectual Property.
*
*******************************************************************************/
package com.att.nsa.cambria.backends.kafka;
import java.io.IOException;
import java.util.ArrayList;
import java.util.LinkedList;
import java.util.List;
import java.util.Properties;
import kafka.common.FailedToSendMessageException;
import kafka.javaapi.producer.Producer;
import kafka.producer.KeyedMessage;
import kafka.producer.ProducerConfig;
import org.json.JSONException;
//import org.slf4j.Logger;
//import org.slf4j.LoggerFactory;
import com.att.eelf.configuration.EELFLogger;
import com.att.eelf.configuration.EELFManager;
import org.springframework.beans.factory.annotation.Qualifier;
import com.att.nsa.cambria.backends.Publisher;
import com.att.nsa.cambria.constants.CambriaConstants;
import com.att.nsa.drumlin.till.nv.rrNvReadable;
/**
* Sends raw JSON objects into Kafka.
*
* Could improve space: BSON rather than JSON?
*
* @author author
*
*/
public class KafkaPublisher implements Publisher {
/**
* constructor initializing
*
* @param settings
* @throws rrNvReadable.missingReqdSetting
*/
public KafkaPublisher(@Qualifier("propertyReader") rrNvReadable settings) throws rrNvReadable.missingReqdSetting {
//fSettings = settings;
final Properties props = new Properties();
/*transferSetting(fSettings, props, "metadata.broker.list", "localhost:9092");
transferSetting(fSettings, props, "request.required.acks", "1");
transferSetting(fSettings, props, "message.send.max.retries", "5");
transferSetting(fSettings, props, "retry.backoff.ms", "150"); */
String kafkaConnUrl= com.att.ajsc.filemonitor.AJSCPropertiesMap.getProperty(CambriaConstants.msgRtr_prop,"kafka.metadata.broker.list");
System.out.println("kafkaConnUrl:- "+kafkaConnUrl);
if(null==kafkaConnUrl){
kafkaConnUrl="localhost:9092";
}
transferSetting( props, "metadata.broker.list", kafkaConnUrl);
transferSetting( props, "request.required.acks", "1");
transferSetting( props, "message.send.max.retries", "5");
transferSetting(props, "retry.backoff.ms", "150");
props.put("serializer.class", "kafka.serializer.StringEncoder");
fConfig = new ProducerConfig(props);
fProducer = new Producer<String, String>(fConfig);
}
/**
* Send a message with a given topic and key.
*
* @param msg
* @throws FailedToSendMessageException
* @throws JSONException
*/
@Override
public void sendMessage(String topic, message msg) throws IOException, FailedToSendMessageException {
final List<message> msgs = new LinkedList<message>();
msgs.add(msg);
sendMessages(topic, msgs);
}
/**
* method publishing batch messages
*
* @param topic
* @param kms
* throws IOException
*/
public void sendBatchMessage(String topic, ArrayList<KeyedMessage<String, String>> kms) throws IOException {
try {
fProducer.send(kms);
} catch (FailedToSendMessageException excp) {
log.error("Failed to send message(s) to topic [" + topic + "].", excp);
throw new FailedToSendMessageException(excp.getMessage(), excp);
}
}
/**
* Send a set of messages. Each must have a "key" string value.
*
* @param topic
* @param msg
* @throws FailedToSendMessageException
* @throws JSONException
*/
@Override
public void sendMessages(String topic, List<? extends message> msgs)
throws IOException, FailedToSendMessageException {
log.info("sending " + msgs.size() + " events to [" + topic + "]");
final List<KeyedMessage<String, String>> kms = new ArrayList<KeyedMessage<String, String>>(msgs.size());
for (message o : msgs) {
final KeyedMessage<String, String> data = new KeyedMessage<String, String>(topic, o.getKey(), o.toString());
kms.add(data);
}
try {
fProducer.send(kms);
} catch (FailedToSendMessageException excp) {
log.error("Failed to send message(s) to topic [" + topic + "].", excp);
throw new FailedToSendMessageException(excp.getMessage(), excp);
}
}
//private final rrNvReadable fSettings;
private ProducerConfig fConfig;
private Producer<String, String> fProducer;
/**
* It sets the key value pair
* @param topic
* @param msg
* @param key
* @param defVal
*/
private void transferSetting(Properties props, String key, String defVal) {
String kafka_prop= com.att.ajsc.filemonitor.AJSCPropertiesMap.getProperty(CambriaConstants.msgRtr_prop,"kafka." + key);
if (null==kafka_prop) kafka_prop=defVal;
//props.put(key, settings.getString("kafka." + key, defVal));
props.put(key, kafka_prop);
}
//private static final Logger log = LoggerFactory.getLogger(KafkaPublisher.class);
private static final EELFLogger log = EELFManager.getInstance().getLogger(KafkaPublisher.class);
}
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