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/*
* 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.logging.log4j.core.appender.mom.kafka;
import java.util.Properties;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
import org.apache.kafka.clients.producer.Producer;
import org.apache.kafka.clients.producer.ProducerRecord;
import org.apache.logging.log4j.core.appender.AbstractManager;
import org.apache.logging.log4j.core.config.Property;
import org.apache.logging.log4j.core.util.Log4jThread;
public class KafkaManager extends AbstractManager {
public static final String DEFAULT_TIMEOUT_MILLIS = "30000";
/**
* package-private access for testing.
*/
static KafkaProducerFactory producerFactory = new DefaultKafkaProducerFactory();
private final Properties config = new Properties();
private Producer producer = null;
private final int timeoutMillis;
private final String topic;
public KafkaManager(final String name, final String topic, final Property[] properties) {
super(name);
this.topic = topic;
config.setProperty("key.serializer", "org.apache.kafka.common.serialization.ByteArraySerializer");
config.setProperty("value.serializer", "org.apache.kafka.common.serialization.ByteArraySerializer");
config.setProperty("batch.size", "0");
for (final Property property : properties) {
config.setProperty(property.getName(), property.getValue());
}
this.timeoutMillis = Integer.parseInt(config.getProperty("timeout.ms", DEFAULT_TIMEOUT_MILLIS));
}
@Override
public void releaseSub() {
if (producer != null) {
// This thread is a workaround for this Kafka issue: https://issues.apache.org/jira/browse/KAFKA-1660
final Thread closeThread = new Log4jThread(new Runnable() {
@Override
public void run() {
producer.close();
}
});
closeThread.setName("KafkaManager-CloseThread");
closeThread.setDaemon(true); // avoid blocking JVM shutdown
closeThread.start();
try {
closeThread.join(timeoutMillis);
} catch (final InterruptedException ignore) {
// ignore
}
}
}
public void send(final byte[] msg) throws ExecutionException, InterruptedException, TimeoutException {
if (producer != null) {
producer.send(new ProducerRecord(topic, msg)).get(timeoutMillis, TimeUnit.MILLISECONDS);
}
}
public void startup() {
producer = producerFactory.newKafkaProducer(config);
}
public String getTopic() {
return topic;
}
}