| /** |
| * Copyright 2016-present Open Networking Foundation |
| * |
| * 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.osgi.service.component.annotations.Activate; |
| import org.osgi.service.component.annotations.Component; |
| import org.osgi.service.component.annotations.Deactivate; |
| import org.osgi.service.component.annotations.Reference; |
| import org.onosproject.cluster.ClusterService; |
| import org.onosproject.cluster.NodeId; |
| import org.osgi.service.component.annotations.ReferenceCardinality; |
| import org.onosproject.cluster.LeadershipService; |
| import org.onosproject.kafkaintegration.api.EventConversionService; |
| import org.onosproject.kafkaintegration.api.EventSubscriptionService; |
| import org.onosproject.kafkaintegration.api.KafkaEventStorageService; |
| 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.Objects; |
| 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 EventListener { |
| private final Logger log = LoggerFactory.getLogger(getClass()); |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| protected EventSubscriptionService eventSubscriptionService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| protected EventConversionService eventConversionService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| protected DeviceService deviceService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| protected LinkService linkService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| protected KafkaEventStorageService kafkaStoreService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| protected LeadershipService leadershipService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| protected ClusterService clusterService; |
| |
| private final DeviceListener deviceListener = new InternalDeviceListener(); |
| private final LinkListener linkListener = new InternalLinkListener(); |
| |
| protected ExecutorService eventExecutor; |
| |
| private static final String PUBLISHER_TOPIC = "WORK_QUEUE_PUBLISHER"; |
| |
| private NodeId localNodeId; |
| |
| @Activate |
| protected void activate() { |
| |
| eventExecutor = newSingleThreadScheduledExecutor(groupedThreads("onos/onosEvents", "events-%d", log)); |
| deviceService.addListener(deviceListener); |
| linkService.addListener(linkListener); |
| |
| localNodeId = clusterService.getLocalNode().id(); |
| |
| leadershipService.runForLeadership(PUBLISHER_TOPIC); |
| |
| log.info("Started"); |
| } |
| |
| @Deactivate |
| protected void deactivate() { |
| deviceService.removeListener(deviceListener); |
| linkService.removeListener(linkListener); |
| |
| eventExecutor.shutdownNow(); |
| eventExecutor = null; |
| |
| log.info("Stopped"); |
| } |
| |
| private class InternalDeviceListener implements DeviceListener { |
| |
| @Override |
| public void event(DeviceEvent event) { |
| |
| // do not allow to proceed without leadership |
| NodeId leaderNodeId = leadershipService.getLeader(PUBLISHER_TOPIC); |
| if (!Objects.equals(localNodeId, leaderNodeId)) { |
| log.debug("Not a Leader, cannot publish!"); |
| return; |
| } |
| |
| if (!eventSubscriptionService.getEventSubscribers(DEVICE).isEmpty()) { |
| OnosEvent onosEvent = eventConversionService.convertEvent(event); |
| eventExecutor.execute(() -> { |
| kafkaStoreService.publishEvent(onosEvent); |
| }); |
| log.debug("Pushed event {} to kafka storage", onosEvent); |
| } |
| |
| } |
| } |
| |
| private class InternalLinkListener implements LinkListener { |
| |
| @Override |
| public void event(LinkEvent event) { |
| |
| // do not allow to proceed without leadership |
| NodeId leaderNodeId = leadershipService.getLeader(PUBLISHER_TOPIC); |
| if (!Objects.equals(localNodeId, leaderNodeId)) { |
| log.debug("Not a Leader, cannot publish!"); |
| return; |
| } |
| |
| if (!eventSubscriptionService.getEventSubscribers(LINK).isEmpty()) { |
| OnosEvent onosEvent = eventConversionService.convertEvent(event); |
| eventExecutor.execute(() -> { |
| kafkaStoreService.publishEvent(onosEvent); |
| }); |
| log.debug("Pushed event {} to kafka storage", onosEvent); |
| } |
| |
| } |
| } |
| } |