| /* |
| * 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.impl; |
| |
| import org.apache.felix.scr.annotations.Activate; |
| import org.apache.felix.scr.annotations.Component; |
| import org.apache.felix.scr.annotations.Service; |
| import org.apache.felix.scr.annotations.Deactivate; |
| import org.apache.felix.scr.annotations.Reference; |
| import org.apache.felix.scr.annotations.ReferenceCardinality; |
| import org.onosproject.kafkaintegration.api.KafkaEventStorageService; |
| import org.onosproject.kafkaintegration.api.dto.OnosEvent; |
| import org.onosproject.store.serializers.KryoNamespaces; |
| import org.onosproject.store.service.Serializer; |
| import org.onosproject.store.service.StorageService; |
| import org.onosproject.store.service.Task; |
| import org.onosproject.store.service.WorkQueue; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.util.concurrent.CompletableFuture; |
| import java.util.concurrent.ExecutionException; |
| |
| @Component(immediate = false) |
| @Service |
| public class KafkaStorageManager implements KafkaEventStorageService { |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected StorageService storageService; |
| |
| private final Logger log = LoggerFactory.getLogger(getClass()); |
| |
| private static final String KAFKA_WORK_QUEUE = "Kafka-Work-Queue"; |
| |
| private WorkQueue<OnosEvent> queue; |
| |
| @Activate |
| protected void activate() { |
| queue = storageService.<OnosEvent>getWorkQueue(KAFKA_WORK_QUEUE, |
| Serializer.using(KryoNamespaces.API, |
| OnosEvent.class, |
| OnosEvent.Type.class)); |
| |
| log.info("Started"); |
| } |
| |
| @Deactivate |
| protected void deactivate() { |
| queue = null; |
| log.info("Stopped"); |
| } |
| |
| @Override |
| public void publishEvent(OnosEvent e) { |
| queue.addOne(e); |
| log.debug("Published {} Event to Distributed Work Queue", e.type()); |
| } |
| |
| @Override |
| public OnosEvent consumeEvent() { |
| Task<OnosEvent> task = null; |
| |
| CompletableFuture<Task<OnosEvent>> future = queue.take(); |
| try { |
| task = future.get(); |
| } catch (InterruptedException e) { |
| Thread.currentThread().interrupt(); |
| } catch (ExecutionException e) { |
| log.warn("consumeEvent()", e); |
| } |
| |
| if (task != null) { |
| queue.complete(task.taskId()); |
| log.debug("Consumed {} Event from Distributed Work Queue with id {}", |
| task.payload().type(), task.taskId()); |
| return task.payload(); |
| } |
| |
| return null; |
| } |
| |
| } |