| /* |
| * 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.yms.app.ynh; |
| |
| import org.onosproject.event.Event; |
| import org.onosproject.event.EventListener; |
| import org.onosproject.event.ListenerRegistry; |
| import org.onosproject.event.ListenerService; |
| import org.onosproject.yms.app.ysr.YangSchemaRegistry; |
| import org.onosproject.yms.app.ytb.DefaultYangTreeBuilder; |
| import org.onosproject.yms.app.ytb.YangTreeBuilder; |
| import org.onosproject.yms.ydt.YdtContext; |
| import org.onosproject.yms.ynh.YangNotification; |
| import org.onosproject.yms.ynh.YangNotificationEvent; |
| import org.onosproject.yms.ynh.YangNotificationListener; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.util.concurrent.ExecutorService; |
| import java.util.concurrent.Executors; |
| |
| import static org.onlab.util.Tools.groupedThreads; |
| |
| /** |
| * Representation of YANG notification manager. |
| */ |
| public class YangNotificationManager |
| extends ListenerRegistry<YangNotificationEvent, YangNotificationListener> |
| implements YangNotificationExtendedService { |
| |
| private static final String YANG_NOTIFICATION = "yangnotification"; |
| |
| private final Logger log = LoggerFactory.getLogger(getClass()); |
| |
| private ExecutorService executor; |
| |
| /** |
| * YANG notification abstract listener. This listener will listens |
| * abstractly to all the notification from the application to which it |
| * has subscribed. |
| */ |
| private YnhAbstractListener listener; |
| |
| /** |
| * Maintains schema registry. |
| */ |
| private YangSchemaRegistry schemaRegistry; |
| |
| /** |
| * Creates an instance of YANG notification manager. |
| * |
| * @param registry YANG schema registry |
| */ |
| public YangNotificationManager(YangSchemaRegistry registry) { |
| listener = new YnhAbstractListener(); |
| executor = Executors.newSingleThreadExecutor(groupedThreads( |
| "onos/yms", "event-handler-%d", log)); |
| schemaRegistry = registry; |
| } |
| |
| @Override |
| public void registerAsListener(ListenerService manager) { |
| manager.addListener(listener); |
| } |
| |
| @Override |
| public YangNotification getFilteredSubject(YangNotification subject, |
| YangNotification filter) { |
| return null; |
| // TODO |
| } |
| |
| /** |
| * Representation of YANG notification handler's abstract listener. It |
| * listens for events from application(s). |
| */ |
| private class YnhAbstractListener<E extends Event> implements |
| EventListener<E> { |
| |
| @Override |
| public void event(Event event) { |
| executor.execute(() -> { |
| try { |
| log.info("Event received in ynh " + event.type()); |
| /* |
| * Obtain YANG data tree corresponding to notification with |
| * logical root node as yangnotification, followed by |
| * module/sub-module, followed by notification. |
| */ |
| YangTreeBuilder builder = new DefaultYangTreeBuilder(); |
| YdtContext context = builder.getYdtForNotification( |
| event, YANG_NOTIFICATION, schemaRegistry); |
| /* |
| * Create YANG notification from obtained data tree and |
| * send it to registered protocols. |
| */ |
| YangNotification notification = |
| new YangNotification(context); |
| process(new YangNotificationEvent(notification)); |
| } catch (Exception e) { |
| log.warn("Failed to process {}", event, e); |
| } |
| }); |
| } |
| } |
| } |