| /* |
| * 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.cloudstack.mom.kafka; |
| |
| import java.io.FileInputStream; |
| |
| import java.util.Map; |
| import java.util.UUID; |
| import java.util.Properties; |
| |
| import javax.naming.ConfigurationException; |
| |
| import org.apache.log4j.Logger; |
| |
| import org.apache.cloudstack.framework.events.Event; |
| import org.apache.cloudstack.framework.events.EventBus; |
| import org.apache.cloudstack.framework.events.EventBusException; |
| import org.apache.cloudstack.framework.events.EventSubscriber; |
| import org.apache.cloudstack.framework.events.EventTopic; |
| |
| import com.cloud.utils.component.ManagerBase; |
| |
| import org.apache.kafka.clients.producer.Producer; |
| import org.apache.kafka.clients.producer.KafkaProducer; |
| import org.apache.kafka.clients.producer.ProducerRecord; |
| |
| import com.cloud.utils.PropertiesUtil; |
| |
| public class KafkaEventBus extends ManagerBase implements EventBus { |
| |
| public static final String DEFAULT_TOPIC = "cloudstack"; |
| public static final String DEFAULT_SERIALIZER = "org.apache.kafka.common.serialization.StringSerializer"; |
| |
| private String _topic = null; |
| private Producer<String,String> _producer; |
| private static final Logger s_logger = Logger.getLogger(KafkaEventBus.class); |
| |
| @Override |
| public boolean configure(String name, Map<String, Object> params) throws ConfigurationException { |
| |
| final Properties props = new Properties(); |
| |
| try (final FileInputStream is = new FileInputStream(PropertiesUtil.findConfigFile("kafka.producer.properties"));) { |
| props.load(is); |
| |
| _topic = (String)props.remove("topic"); |
| if (_topic == null) { |
| _topic = DEFAULT_TOPIC; |
| } |
| |
| if (!props.containsKey("key.serializer")) { |
| props.put("key.serializer", DEFAULT_SERIALIZER); |
| } |
| |
| if (!props.containsKey("value.serializer")) { |
| props.put("value.serializer", DEFAULT_SERIALIZER); |
| } |
| } catch (Exception e) { |
| throw new ConfigurationException("Could not read kafka properties"); |
| } |
| |
| _producer = new KafkaProducer<String,String>(props); |
| _name = name; |
| |
| return true; |
| } |
| |
| @Override |
| public void setName(String name) { |
| _name = name; |
| } |
| |
| @Override |
| public UUID subscribe(EventTopic topic, EventSubscriber subscriber) throws EventBusException { |
| /* NOOP */ |
| return UUID.randomUUID(); |
| } |
| |
| @Override |
| public void unsubscribe(UUID subscriberId, EventSubscriber subscriber) throws EventBusException { |
| /* NOOP */ |
| } |
| |
| @Override |
| public void publish(Event event) throws EventBusException { |
| ProducerRecord<String, String> record = new ProducerRecord<String,String>(_topic, event.getResourceUUID(), event.getDescription()); |
| _producer.send(record); |
| } |
| |
| @Override |
| public String getName() { |
| return _name; |
| } |
| |
| @Override |
| public boolean start() { |
| return true; |
| } |
| |
| @Override |
| public boolean stop() { |
| return true; |
| } |
| } |