| /** |
| * Copyright 2016-present Open Networking Laboratory |
| * |
| * 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. |
| */ |
| |
| package org.onosproject.kafkaintegration.kafka; |
| |
| import org.apache.felix.scr.annotations.Activate; |
| import org.apache.felix.scr.annotations.Component; |
| import org.apache.felix.scr.annotations.Deactivate; |
| import org.apache.felix.scr.annotations.Reference; |
| import org.apache.felix.scr.annotations.ReferenceCardinality; |
| import org.apache.kafka.clients.producer.ProducerRecord; |
| import org.onosproject.kafkaintegration.api.EventConversionService; |
| import org.onosproject.kafkaintegration.api.EventSubscriptionService; |
| import org.onosproject.kafkaintegration.api.KafkaProducerService; |
| import org.onosproject.kafkaintegration.api.KafkaConfigService; |
| import org.onosproject.kafkaintegration.api.dto.OnosEvent; |
| import org.onosproject.net.device.DeviceEvent; |
| import org.onosproject.net.device.DeviceListener; |
| import org.onosproject.net.device.DeviceService; |
| import org.onosproject.net.link.LinkEvent; |
| import org.onosproject.net.link.LinkListener; |
| import org.onosproject.net.link.LinkService; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.util.concurrent.ExecutionException; |
| import java.util.concurrent.ExecutorService; |
| |
| import static java.util.concurrent.Executors.newSingleThreadScheduledExecutor; |
| import static org.onlab.util.Tools.groupedThreads; |
| import static org.onosproject.kafkaintegration.api.dto.OnosEvent.Type.DEVICE; |
| import static org.onosproject.kafkaintegration.api.dto.OnosEvent.Type.LINK; |
| |
| |
| /** |
| * Encapsulates the behavior of monitoring various ONOS events. |
| * */ |
| @Component(immediate = true) |
| public class EventMonitor { |
| private final Logger log = LoggerFactory.getLogger(getClass()); |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected EventSubscriptionService eventSubscriptionService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected EventConversionService eventConversionService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected KafkaProducerService kafkaProducer; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected DeviceService deviceService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected LinkService linkService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected KafkaConfigService kafkaConfigService; |
| |
| private final DeviceListener deviceListener = new InternalDeviceListener(); |
| private final LinkListener linkListener = new InternalLinkListener(); |
| |
| protected ExecutorService eventExecutor; |
| |
| @Activate |
| protected void activate() { |
| |
| eventExecutor = newSingleThreadScheduledExecutor(groupedThreads("onos/onosEvents", "events-%d", log)); |
| deviceService.addListener(deviceListener); |
| linkService.addListener(linkListener); |
| |
| kafkaProducer.start(kafkaConfigService.getConfigParams()); |
| |
| log.info("Started"); |
| } |
| |
| @Deactivate |
| protected void deactivate() { |
| deviceService.removeListener(deviceListener); |
| linkService.removeListener(linkListener); |
| |
| eventExecutor.shutdownNow(); |
| eventExecutor = null; |
| |
| kafkaProducer.stop(); |
| |
| log.info("Stopped"); |
| } |
| |
| private class InternalDeviceListener implements DeviceListener { |
| |
| @Override |
| public void event(DeviceEvent event) { |
| |
| if (!eventSubscriptionService.getEventSubscribers(DEVICE).isEmpty()) { |
| OnosEvent onosEvent = eventConversionService.convertEvent(event); |
| eventExecutor.execute(() -> { |
| try { |
| kafkaProducer.send(new ProducerRecord<>(DEVICE.toString(), |
| onosEvent.subject().toByteArray())).get(); |
| |
| log.debug("Event Type - {}, Subject {} sent successfully.", |
| DEVICE, onosEvent.subject()); |
| |
| } catch (InterruptedException e1) { |
| Thread.currentThread().interrupt(); |
| } catch (ExecutionException e2) { |
| log.error("Exception thrown {}", e2); |
| } |
| }); |
| } else { |
| log.debug("No device listeners"); |
| } |
| } |
| } |
| |
| private class InternalLinkListener implements LinkListener { |
| |
| @Override |
| public void event(LinkEvent event) { |
| |
| if (!eventSubscriptionService.getEventSubscribers(LINK).isEmpty()) { |
| OnosEvent onosEvent = eventConversionService.convertEvent(event); |
| eventExecutor.execute(() -> { |
| try { |
| kafkaProducer.send(new ProducerRecord<>(LINK.toString(), |
| onosEvent.subject().toByteArray())).get(); |
| |
| log.debug("Event Type - {}, Subject {} sent successfully.", |
| LINK, onosEvent.subject()); |
| |
| } catch (InterruptedException e1) { |
| Thread.currentThread().interrupt(); |
| } catch (ExecutionException e2) { |
| log.error("Exception thrown {}", e2); |
| } |
| }); |
| } else { |
| log.debug("No link listeners"); |
| } |
| } |
| } |
| } |